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 Go to latest Published: Apr 20, 2017 License: Apache-2.0 Imports: 28 Imported by: 0

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Index

Constants

View Source 
const (
	NoProblem                                             AnalysisCode = "NoProblem"
	DeadMasterWithoutSlaves                                            = "DeadMasterWithoutSlaves"
	DeadMaster                                                         = "DeadMaster"
	DeadMasterAndSlaves                                                = "DeadMasterAndSlaves"
	DeadMasterAndSomeSlaves                                            = "DeadMasterAndSomeSlaves"
	UnreachableMasterWithStaleSlaves                                   = "UnreachableMasterWithStaleSlaves"
	UnreachableMaster                                                  = "UnreachableMaster"
	MasterSingleSlaveNotReplicating                                    = "MasterSingleSlaveNotReplicating"
	MasterSingleSlaveDead                                              = "MasterSingleSlaveDead"
	AllMasterSlavesNotReplicating                                      = "AllMasterSlavesNotReplicating"
	AllMasterSlavesNotReplicatingOrDead                                = "AllMasterSlavesNotReplicatingOrDead"
	AllMasterSlavesStale                                               = "AllMasterSlavesStale"
	MasterWithoutSlaves                                                = "MasterWithoutSlaves"
	DeadCoMaster                                                       = "DeadCoMaster"
	DeadCoMasterAndSomeSlaves                                          = "DeadCoMasterAndSomeSlaves"
	UnreachableCoMaster                                                = "UnreachableCoMaster"
	AllCoMasterSlavesNotReplicating                                    = "AllCoMasterSlavesNotReplicating"
	DeadIntermediateMaster                                             = "DeadIntermediateMaster"
	DeadIntermediateMasterWithSingleSlave                              = "DeadIntermediateMasterWithSingleSlave"
	DeadIntermediateMasterWithSingleSlaveFailingToConnect              = "DeadIntermediateMasterWithSingleSlaveFailingToConnect"
	DeadIntermediateMasterAndSomeSlaves                                = "DeadIntermediateMasterAndSomeSlaves"
	DeadIntermediateMasterAndSlaves                                    = "DeadIntermediateMasterAndSlaves"
	UnreachableIntermediateMaster                                      = "UnreachableIntermediateMaster"
	AllIntermediateMasterSlavesFailingToConnectOrDead                  = "AllIntermediateMasterSlavesFailingToConnectOrDead"
	AllIntermediateMasterSlavesNotReplicating                          = "AllIntermediateMasterSlavesNotReplicating"
	FirstTierSlaveFailingToConnectToMaster                             = "FirstTierSlaveFailingToConnectToMaster"
	BinlogServerFailingToConnectToMaster                               = "BinlogServerFailingToConnectToMaster"
)
View Source 
const (
	StatementAndMixedLoggingSlavesStructureWarning StructureAnalysisCode = "StatementAndMixedLoggingSlavesStructureWarning"
	StatementAndRowLoggingSlavesStructureWarning                         = "StatementAndRowLoggingSlavesStructureWarning"
	MixedAndRowLoggingSlavesStructureWarning                             = "MixedAndRowLoggingSlavesStructureWarning"
	MultipleMajorVersionsLoggingSlaves                                   = "MultipleMajorVersionsLoggingSlaves"
)
View Source 
const (
	MustPromoteRule      CandidatePromotionRule = "must"
	PreferPromoteRule                           = "prefer"
	NeutralPromoteRule                          = "neutral"
	PreferNotPromoteRule                        = "prefer_not"
	MustNotPromoteRule                          = "must_not"
)
View Source 
const (
	NoStopReplication     StopReplicationMethod = "NoStopReplication"
	StopReplicationNormal                       = "StopReplicationNormal"
	StopReplicationNicely                       = "StopReplicationNicely"
)
View Source 
const (
	GTIDHintDeny    OperationGTIDHint = "NoGTID"
	GTIDHintNeutral                   = "GTIDHintNeutral"
	GTIDHintForce                     = "GTIDHintForce"
)
View Source 
const ReasonableDiscoveryLatency = 500 * time.Millisecond

Variables

View Source 
var (
	DowntimeLostInRecoveryMessage = "lost-in-recovery"
)

Functions

func ASCIITopology 

func ASCIITopology(clusterName string, historyTimestampPattern string) (result string, err error)

ASCIITopology returns a string representation of the topology of given cluster.

func ApplyPoolInstances 

func ApplyPoolInstances(pool string, instancesList string) error

func AreReplicationThreadsRunning 

func AreReplicationThreadsRunning(instanceKey *InstanceKey) (replicationThreadsRunning bool, err error)

AreReplicationThreadsRunning checks if both IO and SQL threads are running

func AuditOperation 

func AuditOperation(auditType string, instanceKey *InstanceKey, message string) error

AuditOperation creates and writes a new audit entry by given params

func BeginBoundedMaintenance 

func BeginBoundedMaintenance(instanceKey *InstanceKey, owner string, reason string, durationSeconds uint, explicitlyBounded bool) (int64, error)

BeginBoundedMaintenance will make new maintenance entry for given instanceKey.

func BeginDowntime 

func BeginDowntime(instanceKey *InstanceKey, owner string, reason string, durationSeconds uint) error

BeginDowntime will make mark an instance as downtimed (or override existing downtime period)

func BeginMaintenance 

func BeginMaintenance(instanceKey *InstanceKey, owner string, reason string) (int64, error)

BeginMaintenance will make new maintenance entry for given instanceKey. Maintenance time is unbounded

func DeleteInvalidHostnameResolves 

func DeleteInvalidHostnameResolves() error

DeleteInvalidHostnameResolves removes invalid resolves. At this time these are: - infinite loop resolves (A->B and B->A), remove earlier mapping

func DeregisterHostnameUnresolve 

func DeregisterHostnameUnresolve(instanceKey *InstanceKey) error

DeregisterHostnameUnresolve removes an unresovle entry

func EmptyCommitInstance 

func EmptyCommitInstance(instanceKey *InstanceKey) error

EmptyCommitInstance issues an empty COMMIT on a given instance

func EnableAuditSyslog 

func EnableAuditSyslog() (err error)

EnableSyslogWriter enables, if possible, writes to syslog. These will execute _in addition_ to normal logging

func EnableSemiSync 

func EnableSemiSync(instanceKey *InstanceKey, master, slave bool) error

EnableSemiSync sets the rpl_semi_sync_(master|slave)_enabled variables on a given instance.

func EndDowntime 

func EndDowntime(instanceKey *InstanceKey) (wasDowntimed bool, err error)

EndDowntime will remove downtime flag from an instance

func EndMaintenance 

func EndMaintenance(maintenanceToken int64) (wasMaintenance bool, err error)

EndMaintenance will terminate an active maintenance via maintenanceToken

func EndMaintenanceByInstanceKey 

func EndMaintenanceByInstanceKey(instanceKey *InstanceKey) (wasMaintenance bool, err error)

EndMaintenanceByInstanceKey will terminate an active maintenance using given instanceKey as hint

func ExecDBWriteFunc 

func ExecDBWriteFunc(f func() error) error

ExecDBWriteFunc chooses how to execute a write onto the database: whether synchronuously or not

func ExecInstance 

func ExecInstance(instanceKey *InstanceKey, query string, args ...interface{}) (sql.Result, error)

ExecInstance executes a given query on the given MySQL topology instance

func ExecInstanceNoPrepare 

func ExecInstanceNoPrepare(instanceKey *InstanceKey, query string, args ...interface{}) (sql.Result, error)

ExecInstanceNoPrepare executes a given query on the given MySQL topology instance, without using prepared statements

func ExecuteOnTopology 

func ExecuteOnTopology(f func())

ExecuteOnTopology will execute given function while maintaining concurrency limit on topology servers. It is safe in the sense that we will not leak tokens.

func ExpireAudit 

func ExpireAudit() error

ExpireAudit removes old rows from the audit table

func ExpireCandidateInstances 

func ExpireCandidateInstances() error

ExpireCandidateInstances removes stale master candidate suggestions.

func ExpireClusterDomainName 

func ExpireClusterDomainName() error

ExpireClusterDomainName expires cluster_domain_name entries that haven't been updated recently.

func ExpireDowntime 

func ExpireDowntime() error

ExpireDowntime will remove the maintenance flag on old downtimes

func ExpireHostnameUnresolve 

func ExpireHostnameUnresolve() error

ExpireHostnameUnresolve expires hostname_unresolve entries that haven't been updated recently.

func ExpireInstanceAnalysisChangelog 

func ExpireInstanceAnalysisChangelog() error

ExpireInstanceAnalysisChangelog removes old-enough analysis entries from the changelog

func ExpireMaintenance 

func ExpireMaintenance() error

ExpireMaintenance will remove the maintenance flag on old maintenances and on bounded maintenances

func ExpireMasterPositionEquivalence 

func ExpireMasterPositionEquivalence() error

ExpireMasterPositionEquivalence expires old master_position_equivalence

func ExpirePoolInstances 

func ExpirePoolInstances() error

ExpirePoolInstances cleans up the database_instance_pool table from expired items

func FindClusterNameByFuzzyInstanceKey 

func FindClusterNameByFuzzyInstanceKey(fuzzyInstanceKey *InstanceKey) (string, error)

FindClusterNameByFuzzyInstanceKey attempts to find a uniquely identifyable cluster name given a fuzze key. It hopes to find instances matching given fuzzy key such that they all belong to same cluster

func FlushNontrivialResolveCacheToDatabase 

func FlushNontrivialResolveCacheToDatabase() error

func ForgetExpiredHostnameResolves 

func ForgetExpiredHostnameResolves() error

ForgetExpiredHostnameResolves

func ForgetInstance 

func ForgetInstance(instanceKey *InstanceKey) error

ForgetInstance removes an instance entry from the orchestrator backed database. It may be auto-rediscovered through topology or requested for discovery by multiple means.

func ForgetLongUnseenInstances 

func ForgetLongUnseenInstances() error

ForgetLongUnseenInstances will remove entries of all instacnes that have long since been last seen.

func ForgetUnseenInstancesDifferentlyResolved 

func ForgetUnseenInstancesDifferentlyResolved() error

ForgetUnseenInstancesDifferentlyResolved will purge instances which are invalid, and whose hostname appears on the hostname_resolved table; this means some time in the past their hostname was unresovled, and now resovled to a different value; the old hostname is never accessed anymore and the old entry should be removed.

func GetCNAME 

func GetCNAME(hostname string) (string, error)

GetCNAME resolves an IP or hostname into a normalized valid CNAME

func GetCandidateReplica 

func GetCandidateReplica(masterKey *InstanceKey, forRematchPurposes bool) (*Instance, [](*Instance), [](*Instance), [](*Instance), [](*Instance), error)

GetCandidateReplica chooses the best replica to promote given a (possibly dead) master

func GetClusterByAlias 

func GetClusterByAlias(alias string) (string, error)

GetClusterByAlias returns the cluster name associated with given alias. The function returns with error when: - No cluster is associated with the alias - More than one cluster is associated with the alias

func GetClusterHeuristicLag 

func GetClusterHeuristicLag(clusterName string) (int64, error)

GetClusterHeuristicLag returns a heuristic lag for a cluster, based on its OSC replicas

func GetClusterName 

func GetClusterName(instanceKey *InstanceKey) (clusterName string, err error)

func GetHeuristicClusterPoolInstancesLag 

func GetHeuristicClusterPoolInstancesLag(clusterName string, pool string) (int64, error)

GetHeuristicClusterPoolInstancesLag returns a heuristic lag for the instances participating in a cluster pool (or all the cluster's pools)

func GetHeuristiclyRecentCoordinatesForInstance 

func GetHeuristiclyRecentCoordinatesForInstance(instanceKey *InstanceKey) (selfCoordinates *BinlogCoordinates, relayLogCoordinates *BinlogCoordinates, err error)

GetHeuristiclyRecentCoordinatesForInstance returns valid and reasonably recent coordinates for given instance.

func GetInstancesMaxLag 

func GetInstancesMaxLag(instances [](*Instance)) (maxLag int64, err error)

GetInstancesMaxLag returns the maximum lag in a set of instances

func GetLastKnownCoordinatesForInstance 

func GetLastKnownCoordinatesForInstance(instanceKey *InstanceKey) (selfCoordinates *BinlogCoordinates, relayLogCoordinates *BinlogCoordinates, err error)

GetLastKnownCoordinatesForInstance returns the very last known coordinates for an instance

func GetMaintenanceOwner 

func GetMaintenanceOwner() string

func GetSlaveRestartPreserveStatements 

func GetSlaveRestartPreserveStatements(instanceKey *InstanceKey, injectedStatement string) (statements []string, err error)

GetSlaveRestartPreserveStatements returns a sequence of statements that make sure a replica is stopped and then returned to the same state. For example, if the replica was fully running, this will issue a STOP on both io_thread and sql_thread, followed by START on both. If one of them is not running at the time this function is called, said thread will be neither stopped nor started. The caller may provide an injected statememt, to be executed while the replica is stopped. This is useful for CHANGE MASTER TO commands, that unfortunately must take place while the replica is completely stopped.

func HostnameResolveCache 

func HostnameResolveCache() (map[string]cache.Item, error)

func HostnameResolveMethodIsNone 

func HostnameResolveMethodIsNone() bool

func InjectUnseenMasters 

func InjectUnseenMasters() error

InjectUnseenMasters will review masters of instances that are known to be replicating, yet which are not listed in database_instance. Since their replicas are listed as replicating, we can assume that such masters actually do exist: we shall therefore inject them with minimal details into the database_instance table.

func InstanceIsMasterOf 

func InstanceIsMasterOf(allegedMaster, allegedReplica *Instance) bool

InstanceIsMasterOf checks whether an instance is the master of another

func InstancesAreSiblings 

func InstancesAreSiblings(instance0, instance1 *Instance) bool

InstancesAreSiblings checks whether both instances are replicating from same master

func IsBannedFromBeingCandidateReplica 

func IsBannedFromBeingCandidateReplica(replica *Instance) bool

func IsSmallerBinlogFormat 

func IsSmallerBinlogFormat(binlogFormat string, otherBinlogFormat string) bool

IsSmallerBinlogFormat tests two binlog formats and sees if one is "smaller" than the other. "smaller" binlog format means you can replicate from the smaller to the larger.

func IsSmallerMajorVersion 

func IsSmallerMajorVersion(version string, otherVersion string) bool

IsSmallerMajorVersion tests two versions against another and returns true if the former is a smaller "major" varsion than the latter. e.g. 5.5.36 is NOT a smaller major version as comapred to 5.5.40, but IS as compared to 5.6.9

func LoadHostnameResolveCache 

func LoadHostnameResolveCache() error

func MajorVersion 

func MajorVersion(version string) []string

MajorVersion returns a MySQL major version number (e.g. given "5.5.36" it returns "5.5")

func MatchBelow 

func MatchBelow(instanceKey, otherKey *InstanceKey, requireInstanceMaintenance bool) (*Instance, *BinlogCoordinates, error)

MatchBelow will attempt moving instance indicated by instanceKey below its the one indicated by otherKey. The refactoring is based on matching binlog entries, not on "classic" positions comparisons. The "other instance" could be the sibling of the moving instance any of its ancestors. It may actually be a cousin of some sort (though unlikely). The only important thing is that the "other instance" is more advanced in replication than given instance.

func MatchUp 

func MatchUp(instanceKey *InstanceKey, requireInstanceMaintenance bool) (*Instance, *BinlogCoordinates, error)

MatchUp will move a replica up the replication chain, so that it becomes sibling of its master, via Pseudo-GTID

func MatchUpReplicas 

func MatchUpReplicas(masterKey *InstanceKey, pattern string) ([](*Instance), *Instance, error, []error)

MatchUpReplicas will move all replicas of given master up the replication chain, so that they become siblings of their master. This should be called when the local master dies, and all its replicas are to be resurrected via Pseudo-GTID

func MoveReplicasGTID 

func MoveReplicasGTID(masterKey *InstanceKey, belowKey *InstanceKey, pattern string) (movedReplicas [](*Instance), unmovedReplicas [](*Instance), err error, errs []error)

MoveReplicasGTID will (attempt to) move all replicas of given master below given instance.

func MoveUpReplicas 

func MoveUpReplicas(instanceKey *InstanceKey, pattern string) ([](*Instance), *Instance, error, []error)

MoveUpReplicas will attempt moving up all replicas of a given instance, at the same time. Clock-time, this is fater than moving one at a time. However this means all replicas of the given instance, and the instance itself, will all stop replicating together.

func MultiMatchBelow 

func MultiMatchBelow(replicas [](*Instance), belowKey *InstanceKey, replicasAlreadyStopped bool, postponedFunctionsContainer *PostponedFunctionsContainer) ([](*Instance), *Instance, error, []error)

MultiMatchBelow will efficiently match multiple replicas below a given instance. It is assumed that all given replicas are siblings

func MultiMatchBelowIndependently 

func MultiMatchBelowIndependently(replicas [](*Instance), belowKey *InstanceKey, postponedFunctionsContainer *PostponedFunctionsContainer) (matchedReplicas [](*Instance), belowInstance *Instance, err error, errs []error)

func MultiMatchReplicas 

func MultiMatchReplicas(masterKey *InstanceKey, belowKey *InstanceKey, pattern string) ([](*Instance), *Instance, error, []error)

MultiMatchReplicas will match (via pseudo-gtid) all replicas of given master below given instance.

func PopulateInstancesAgents 

func PopulateInstancesAgents(instances [](*Instance)) error

PopulateInstancesAgents will fill in extra data acquired from agents for given instances At current this is the number of snapshots. This isn't too pretty; it's a push-into-instance-data-that-belongs-to-agent thing. Originally the need was to visually present the number of snapshots per host on the web/cluster page, which indeed proves to be useful in our experience.

func ReadAliasByClusterName 

func ReadAliasByClusterName(clusterName string) (alias string, err error)

ReadAliasByClusterName returns the cluster alias for the given cluster name, or the cluster name itself if not explicit alias found

func ReadClusterAliasOverride 

func ReadClusterAliasOverride(instance *Instance) (err error)

ReadClusterAliasOverride reads and applies SuggestedClusterAlias based on cluster_alias_override

func ReadClusterNameByAlias 

func ReadClusterNameByAlias(alias string) (clusterName string, err error)

ReadClusterNameByAlias

func ReadClusters 

func ReadClusters() (clusterNames []string, err error)

ReadClusters reads names of all known clusters

func ReadCountMySQLSnapshots 

func ReadCountMySQLSnapshots(hostnames []string) (map[string]int, error)

ReadCountMySQLSnapshots is a utility method to return registered number of snapshots for a given list of hosts

func ReadInstanceClusterAttributes 

func ReadInstanceClusterAttributes(instance *Instance) (err error)

ReadInstanceClusterAttributes will return the cluster name for a given instance by looking at its master and getting it from there. It is a non-recursive function and so-called-recursion is performed upon periodic reading of instances.

func ReadInstancePromotionRule 

func ReadInstancePromotionRule(instance *Instance) (err error)

func ReadReplicationCredentials 

func ReadReplicationCredentials(instanceKey *InstanceKey) (replicationUser string, replicationPassword string, err error)

Attempt to read and return replication credentials from the mysql.slave_master_info system table

func ReadResolvedHostname 

func ReadResolvedHostname(hostname string) (string, error)

ReadResolvedHostname returns the resolved hostname given a hostname, or empty if not exists

func RecordInstanceBinlogFileHistory 

func RecordInstanceBinlogFileHistory() error

RecordInstanceBinlogFileHistory snapshots the binlog coordinates of instances

func RecordInstanceCoordinatesHistory 

func RecordInstanceCoordinatesHistory() error

RecordInstanceCoordinatesHistory snapshots the binlog coordinates of instances

func RefreshTopologyInstances 

func RefreshTopologyInstances(instances [](*Instance))

RefreshTopologyInstances will do a blocking (though concurrent) refresh of all given instances

func RegexpMatchPatterns 

func RegexpMatchPatterns(s string, regexpPatterns []string) bool

RegexpMatchPatterns returns true if s matches any of the provided regexpPatterns

func RegisterCandidateInstance 

func RegisterCandidateInstance(instanceKey *InstanceKey, promotionRule CandidatePromotionRule) error

RegisterCandidateInstance markes a given instance as suggested for successoring a master in the event of failover.

func RegisterHostnameUnresolve 

func RegisterHostnameUnresolve(instanceKey *InstanceKey, unresolvedHostname string) (err error)

func RegroupReplicas 

func RegroupReplicas(masterKey *InstanceKey, returnReplicaEvenOnFailureToRegroup bool,
	onCandidateReplicaChosen func(*Instance),
	postponedFunctionsContainer *PostponedFunctionsContainer) (
	aheadReplicas [](*Instance), equalReplicas [](*Instance), laterReplicas [](*Instance), cannotReplicateReplicas [](*Instance), instance *Instance, err error)

RegroupReplicas is a "smart" method of promoting one replica over the others ("promoting" it on top of its siblings) This method decides which strategy to use: GTID, Pseudo-GTID, Binlog Servers.

func RegroupReplicasBinlogServers 

func RegroupReplicasBinlogServers(masterKey *InstanceKey, returnReplicaEvenOnFailureToRegroup bool) (repointedBinlogServers [](*Instance), promotedBinlogServer *Instance, err error)

RegroupReplicasBinlogServers works on a binlog-servers topology. It picks the most up-to-date BLS and repoints all other BLS below it

func RegroupReplicasGTID 

func RegroupReplicasGTID(masterKey *InstanceKey, returnReplicaEvenOnFailureToRegroup bool, onCandidateReplicaChosen func(*Instance)) ([](*Instance), [](*Instance), [](*Instance), *Instance, error)

RegroupReplicasGTID will choose a candidate replica of a given instance, and take its siblings using GTID

func RegroupReplicasPseudoGTID 

func RegroupReplicasPseudoGTID(masterKey *InstanceKey, returnReplicaEvenOnFailureToRegroup bool, onCandidateReplicaChosen func(*Instance), postponedFunctionsContainer *PostponedFunctionsContainer) ([](*Instance), [](*Instance), [](*Instance), [](*Instance), *Instance, error)

RegroupReplicasPseudoGTID will choose a candidate replica of a given instance, and take its siblings using pseudo-gtid

func RegroupReplicasPseudoGTIDIncludingSubReplicasOfBinlogServers 

func RegroupReplicasPseudoGTIDIncludingSubReplicasOfBinlogServers(masterKey *InstanceKey, returnReplicaEvenOnFailureToRegroup bool, onCandidateReplicaChosen func(*Instance), postponedFunctionsContainer *PostponedFunctionsContainer) ([](*Instance), [](*Instance), [](*Instance), [](*Instance), *Instance, error)

RegroupReplicasPseudoGTIDIncludingSubReplicasOfBinlogServers uses Pseugo-GTID to regroup replicas of given instance. The function also drill in to replicas of binlog servers that are replicating from given instance, and other recursive binlog servers, as long as they're in the same binlog-server-family.

func RelocateReplicas 

func RelocateReplicas(instanceKey, otherKey *InstanceKey, pattern string) (replicas [](*Instance), other *Instance, err error, errs []error)

RelocateReplicas will attempt moving replicas of an instance indicated by instanceKey below another instance. Orchestrator will try and figure out the best way to relocate the servers. This could span normal binlog-position, pseudo-gtid, repointing, binlog servers...

func RematchReplica 

func RematchReplica(instanceKey *InstanceKey, requireInstanceMaintenance bool) (*Instance, *BinlogCoordinates, error)

RematchReplica will re-match a replica to its master, using pseudo-gtid

func ReplaceAliasClusterName 

func ReplaceAliasClusterName(oldClusterName string, newClusterName string) (err error)

ReplaceAliasClusterName replaces alis mapping of one cluster name onto a new cluster name. Used in topology failover/recovery

func ResetHostnameResolveCache 

func ResetHostnameResolveCache() error

func ResetInstanceRelaylogCoordinatesHistory 

func ResetInstanceRelaylogCoordinatesHistory(instanceKey *InstanceKey) error

ResetInstanceRelaylogCoordinatesHistory forgets about the history of an instance. This action is desirable when relay logs become obsolete or irrelevant. Such is the case on `CHANGE MASTER TO`: servers gets compeltely new relay logs.

func ResolveHostname 

func ResolveHostname(hostname string) (string, error)

Attempt to resolve a hostname. This may return a database cached hostname or otherwise it may resolve the hostname via CNAME

func ResolveUnknownMasterHostnameResolves 

func ResolveUnknownMasterHostnameResolves() error

ResolveUnknownMasterHostnameResolves fixes missing hostname resolves based on hostname_resolve_history The use case is replicas replicating from some unknown-hostname which cannot be otherwise found. This could happen due to an expire unresolve together with clearing up of hostname cache.

func ReviewUnseenInstances 

func ReviewUnseenInstances() error

ReviewUnseenInstances reviews instances that have not been seen (suposedly dead) and updates some of their data

func ScanInstanceRow 

func ScanInstanceRow(instanceKey *InstanceKey, query string, dest ...interface{}) error

ScanInstanceRow executes a read-a-single-row query on a given MySQL topology instance

func SemicolonTerminated 

func SemicolonTerminated(statement string) string

SemicolonTerminated is a utility function that makes sure a statement is terminated with a semicolon, if it isn't already

func SetClusterAlias 

func SetClusterAlias(clusterName string, alias string) error

SetClusterAlias will write (and override) a single cluster name mapping

func SetClusterAliasManualOverride 

func SetClusterAliasManualOverride(clusterName string, alias string) error

SetClusterAliasManualOverride will write (and override) a single cluster name mapping

func SetMaintenanceOwner 

func SetMaintenanceOwner(owner string)

func SnapshotTopologies 

func SnapshotTopologies() error

SnapshotTopologies records topology graph for all existing topologies

func StartSlaves 

func StartSlaves(replicas [](*Instance))

StartSlaves will do concurrent start-slave

func UpdateClusterAliases 

func UpdateClusterAliases() error

UpdateClusterAliases writes down the cluster_alias table based on information gained from database_instance

func UpdateInstanceLastAttemptedCheck 

func UpdateInstanceLastAttemptedCheck(instanceKey *InstanceKey) error

UpdateInstanceLastAttemptedCheck updates the last_attempted_check timestamp in the orchestrator backed database for a given instance. This is used as a failsafe mechanism in case access to the instance gets hung (it happens), in which case the entire ReadTopology gets stuck (and no, connection timeout nor driver timeouts don't help. Don't look at me, the world is a harsh place to live in). And so we make sure to note down *before* we even attempt to access the instance; and this raises a red flag when we wish to access the instance again: if last_attempted_check is *newer* than last_checked, that's bad news and means we have a "hanging" issue.

func UpdateInstanceLastChecked 

func UpdateInstanceLastChecked(instanceKey *InstanceKey) error

UpdateInstanceLastChecked updates the last_check timestamp in the orchestrator backed database for a given instance

func UpdateResolvedHostname 

func UpdateResolvedHostname(hostname string, resolvedHostname string) bool

UpdateResolvedHostname will store the given resolved hostname in cache Returns false when the key already existed with same resolved value (similar to AFFECTED_ROWS() in mysql)

func WriteClusterAlias 

func WriteClusterAlias(clusterName string, alias string) error

WriteClusterAlias will write (and override) a single cluster name mapping

func WriteClusterAliasManualOverride 

func WriteClusterAliasManualOverride(clusterName string, alias string) error

WriteClusterAliasManualOverride will write (and override) a single cluster name mapping

func WriteClusterDomainName 

func WriteClusterDomainName(clusterName string, domainName string) error

WriteClusterDomainName will write (and override) the domain name of a cluster

func WriteHostnameUnresolve 

func WriteHostnameUnresolve(instanceKey *InstanceKey, unresolvedHostname string) error

WriteHostnameUnresolve upserts an entry in hostname_unresolve

func WriteLongRunningProcesses 

func WriteLongRunningProcesses(instanceKey *InstanceKey, processes []Process) error

WriteLongRunningProcesses rewrites current state of long running processes for given instance

func WriteMasterPositionEquivalence 

func WriteMasterPositionEquivalence(master1Key *InstanceKey, master1BinlogCoordinates *BinlogCoordinates,
	master2Key *InstanceKey, master2BinlogCoordinates *BinlogCoordinates) error

func WriteResolvedHostname 

func WriteResolvedHostname(hostname string, resolvedHostname string) error

WriteResolvedHostname stores a hostname and the resolved hostname to backend database

Types

type AnalysisCode 

type AnalysisCode string

type Audit 

type Audit struct {
	AuditId          int64
	AuditTimestamp   string
	AuditType        string
	AuditInstanceKey InstanceKey
	Message          string
}

Audit presents a single audit entry (namely in the database)

func ReadRecentAudit 

func ReadRecentAudit(instanceKey *InstanceKey, page int) ([]Audit, error)

ReadRecentAudit returns a list of audit entries order chronologically descending, using page number.

type BinlogCoordinates 

type BinlogCoordinates struct {
	LogFile string
	LogPos  int64
	Type    BinlogType
}

BinlogCoordinates described binary log coordinates in the form of log file & log position.

func CorrelateBinlogCoordinates 

func CorrelateBinlogCoordinates(instance *Instance, binlogCoordinates *BinlogCoordinates, otherInstance *Instance) (*BinlogCoordinates, int, error)

CorrelateBinlogCoordinates find out, if possible, the binlog coordinates of given otherInstance that correlate with given coordinates of given instance.

func CorrelateRelaylogCoordinates 

func CorrelateRelaylogCoordinates(instance *Instance, relaylogCoordinates *BinlogCoordinates, otherInstance *Instance) (instanceCoordinates, correlatedCoordinates, nextCoordinates *BinlogCoordinates, found bool, err error)

func FindLastPseudoGTIDEntry 

func FindLastPseudoGTIDEntry(instance *Instance, recordedInstanceRelayLogCoordinates BinlogCoordinates, maxBinlogCoordinates *BinlogCoordinates, exhaustiveSearch bool, expectedBinlogFormat *string) (instancePseudoGtidCoordinates *BinlogCoordinates, instancePseudoGtidText string, err error)

FindLastPseudoGTIDEntry will search an instance's binary logs or relay logs for the last pseudo-GTID entry, and return found coordinates as well as entry text

func GetEquivalentBinlogCoordinatesFor 

func GetEquivalentBinlogCoordinatesFor(instanceCoordinates *InstanceBinlogCoordinates, belowKey *InstanceKey) (*BinlogCoordinates, error)

func GetNextBinlogCoordinatesToMatch 

func GetNextBinlogCoordinatesToMatch(
	instance *Instance,
	instanceCoordinates BinlogCoordinates,
	recordedInstanceRelayLogCoordinates BinlogCoordinates,
	maxBinlogCoordinates *BinlogCoordinates,
	other *Instance,
	otherCoordinates BinlogCoordinates) (*BinlogCoordinates, int, error)

GetNextBinlogCoordinatesToMatch is given a twin-coordinates couple for a would-be replica (instance) and another instance (other). This is part of the match-below process, and is the heart of the operation: matching the binlog events starting the twin-coordinates (where both share the same Pseudo-GTID) until "instance" runs out of entries, hopefully before "other" runs out. If "other" runs out that means "instance" is more advanced in replication than "other", in which case we can't turn it into a replica of "other".

func GetPreviousKnownRelayLogCoordinatesForInstance 

func GetPreviousKnownRelayLogCoordinatesForInstance(instance *Instance) (relayLogCoordinates *BinlogCoordinates, err error)

GetPreviousKnownRelayLogCoordinatesForInstance returns known relay log coordinates, that are not the exact current coordinates

func ParseBinlogCoordinates 

func ParseBinlogCoordinates(logFileLogPos string) (*BinlogCoordinates, error)

ParseInstanceKey will parse an InstanceKey from a string representation such as 127.0.0.1:3306

func SearchEntryInBinlog 

func SearchEntryInBinlog(pseudoGTIDRegexp *regexp.Regexp, instanceKey *InstanceKey, binlog string, entryText string, monotonicPseudoGTIDEntries bool, minBinlogCoordinates *BinlogCoordinates) (BinlogCoordinates, bool, error)

SearchEntryInBinlog Given a binlog entry text (query), search it in the given binary log of a given instance

func SearchEntryInInstanceBinlogs 

func SearchEntryInInstanceBinlogs(instance *Instance, entryText string, monotonicPseudoGTIDEntries bool, minBinlogCoordinates *BinlogCoordinates) (*BinlogCoordinates, error)

SearchEntryInInstanceBinlogs will search for a specific text entry within the binary logs of a given instance.

func SearchEventInRelayLogs 

func SearchEventInRelayLogs(searchEvent *BinlogEvent, instance *Instance, minBinlogCoordinates *BinlogCoordinates, recordedInstanceRelayLogCoordinates BinlogCoordinates) (binlogCoordinates, nextCoordinates *BinlogCoordinates, found bool, err error)

func (*BinlogCoordinates) DetachedCoordinates 

func (this *BinlogCoordinates) DetachedCoordinates() (isDetached bool, detachedLogFile string, detachedLogPos string)

FileSmallerThan returns true if this coordinate's file is strictly smaller than the other's.

func (*BinlogCoordinates) DisplayString 

func (this *BinlogCoordinates) DisplayString() string

DisplayString returns a user-friendly string representation of these coordinates

func (*BinlogCoordinates) Equals 

func (this *BinlogCoordinates) Equals(other *BinlogCoordinates) bool

Equals tests equality of this corrdinate and another one.

func (*BinlogCoordinates) FileNumber 

func (this *BinlogCoordinates) FileNumber() (int, int)

FileNumber returns the numeric value of the file, and the length in characters representing the number in the filename. Example: FileNumber() of mysqld.log.000789 is (789, 6)

func (*BinlogCoordinates) FileNumberDistance 

func (this *BinlogCoordinates) FileNumberDistance(other *BinlogCoordinates) int

FileNumberDistance returns the numeric distance between this corrdinate's file number and the other's. Effectively it means "how many roatets/FLUSHes would make these coordinates's file reach the other's"

func (*BinlogCoordinates) FileSmallerThan 

func (this *BinlogCoordinates) FileSmallerThan(other *BinlogCoordinates) bool

FileSmallerThan returns true if this coordinate's file is strictly smaller than the other's.

func (*BinlogCoordinates) IsEmpty 

func (this *BinlogCoordinates) IsEmpty() bool

IsEmpty returns true if the log file is empty, unnamed

func (*BinlogCoordinates) NextFileCoordinates 

func (this *BinlogCoordinates) NextFileCoordinates() (BinlogCoordinates, error)

PreviousFileCoordinates guesses the filename of the previous binlog/relaylog

func (*BinlogCoordinates) PreviousFileCoordinates 

func (this *BinlogCoordinates) PreviousFileCoordinates() (BinlogCoordinates, error)

PreviousFileCoordinates guesses the filename of the previous binlog/relaylog

func (*BinlogCoordinates) PreviousFileCoordinatesBy 

func (this *BinlogCoordinates) PreviousFileCoordinatesBy(offset int) (BinlogCoordinates, error)

PreviousFileCoordinatesBy guesses the filename of the previous binlog/relaylog, by given offset (number of files back)

func (*BinlogCoordinates) SmallerThan 

func (this *BinlogCoordinates) SmallerThan(other *BinlogCoordinates) bool

SmallerThan returns true if this coordinate is strictly smaller than the other.

func (*BinlogCoordinates) SmallerThanOrEquals 

func (this *BinlogCoordinates) SmallerThanOrEquals(other *BinlogCoordinates) bool

SmallerThanOrEquals returns true if this coordinate is the same or equal to the other one. We do NOT compare the type so we can not use this.Equals()

func (BinlogCoordinates) String 

func (this BinlogCoordinates) String() string

String returns a user-friendly string representation of these coordinates

type BinlogEvent 

type BinlogEvent struct {
	Coordinates  BinlogCoordinates
	NextEventPos int64
	EventType    string
	Info         string
}

func GetLastExecutedEntryInRelayLogs 

func GetLastExecutedEntryInRelayLogs(instance *Instance, minBinlogCoordinates *BinlogCoordinates, recordedInstanceRelayLogCoordinates BinlogCoordinates) (binlogEvent *BinlogEvent, err error)

func ReadBinlogEventAtRelayLogCoordinates 

func ReadBinlogEventAtRelayLogCoordinates(instanceKey *InstanceKey, relaylogCoordinates *BinlogCoordinates) (binlogEvent *BinlogEvent, err error)

func (*BinlogEvent) Equals 

func (this *BinlogEvent) Equals(other *BinlogEvent) bool

func (*BinlogEvent) EqualsIgnoreCoordinates 

func (this *BinlogEvent) EqualsIgnoreCoordinates(other *BinlogEvent) bool

func (*BinlogEvent) NextBinlogCoordinates 

func (this *BinlogEvent) NextBinlogCoordinates() BinlogCoordinates

func (*BinlogEvent) NormalizeInfo 

func (this *BinlogEvent) NormalizeInfo()

type BinlogEventCursor 

type BinlogEventCursor struct {
	// contains filtered or unexported fields
}

func NewBinlogEventCursor 

func NewBinlogEventCursor(startCoordinates BinlogCoordinates, fetchNextEventsFunc func(BinlogCoordinates) ([]BinlogEvent, error)) BinlogEventCursor

fetchNextEventsFunc expected to return events starting at a given position, and automatically fetch those from next binary log when no more rows are found in current log. It is expected to return empty array with no error upon end of binlogs It is expected to return error upon error...

type BinlogType 

type BinlogType int
const (
	BinaryLog BinlogType = iota
	RelayLog
)

type CandidateDatabaseInstance 

type CandidateDatabaseInstance struct {
	Hostname      string
	Port          int
	PromotionRule CandidatePromotionRule
}

CandidateDatabaseInstance contains information about explicit promotion rules for an instance

func BulkReadCandidateDatabaseInstance 

func BulkReadCandidateDatabaseInstance() ([]CandidateDatabaseInstance, error)

BulkReadCandidateDatabaseInstance returns a slice of CandidateDatabaseInstance converted to JSON.

root@myorchestrator [orchestrator]> select * from candidate_database_instance; +-------------------+------+---------------------+----------+----------------+ | hostname | port | last_suggested | priority | promotion_rule | +-------------------+------+---------------------+----------+----------------+ | host1.example.com | 3306 | 2016-11-22 17:41:06 | 1 | prefer | | host2.example.com | 3306 | 2016-11-22 17:40:24 | 1 | prefer | +-------------------+------+---------------------+----------+----------------+ 2 rows in set (0.00 sec)

func (CandidateDatabaseInstance) String 

func (cdi CandidateDatabaseInstance) String() string

String returns a string representation of the CandidateDatabaseInstance struct

type CandidatePromotionRule 

type CandidatePromotionRule string

CandidatePromotionRule describe the promotion preference/rule for an instance. It maps to promotion_rule column in candidate_database_instance

func ParseCandidatePromotionRule 

func ParseCandidatePromotionRule(ruleName string) (CandidatePromotionRule, error)

ParseCandidatePromotionRule returns a CandidatePromotionRule by name. It returns an error if there is no known rule by the given name.

type ClusterInfo 

type ClusterInfo struct {
	ClusterName                            string
	ClusterAlias                           string // Human friendly alias
	ClusterDomain                          string // CNAME/VIP/A-record/whatever of the master of this cluster
	CountInstances                         uint
	HeuristicLag                           int64
	HasAutomatedMasterRecovery             bool
	HasAutomatedIntermediateMasterRecovery bool
}

ClusterInfo makes for a cluster status/info summary

func ReadClusterInfo 

func ReadClusterInfo(clusterName string) (*ClusterInfo, error)

ReadClusterInfo reads some info about a given cluster

func ReadClustersInfo 

func ReadClustersInfo(clusterName string) ([]ClusterInfo, error)

ReadClustersInfo reads names of all known clusters and some aggregated info

func (*ClusterInfo) ApplyClusterAlias 

func (this *ClusterInfo) ApplyClusterAlias()

ApplyClusterAlias updates the given clusterInfo's ClusterAlias property

func (*ClusterInfo) ReadRecoveryInfo 

func (this *ClusterInfo) ReadRecoveryInfo()

ReadRecoveryInfo

type ClusterPoolInstance 

type ClusterPoolInstance struct {
	ClusterName  string
	ClusterAlias string
	Pool         string
	Hostname     string
	Port         int
}

ClusterPoolInstance is an instance mapping a cluster, pool & instance

func ReadAllClusterPoolInstances 

func ReadAllClusterPoolInstances() ([](*ClusterPoolInstance), error)

ReadAllClusterPoolInstances returns all clusters-pools-insatnces associations

func ReadClusterPoolInstances 

func ReadClusterPoolInstances(clusterName string, pool string) (result [](*ClusterPoolInstance), err error)

ReadClusterPoolInstances reads cluster-pool-instance associationsfor given cluster and pool

type HostnameResolve 

type HostnameResolve struct {
	// contains filtered or unexported fields
}

func ReadAllHostnameResolves 

func ReadAllHostnameResolves() ([]HostnameResolve, error)

func (HostnameResolve) String 

func (this HostnameResolve) String() string

type HostnameUnresolve 

type HostnameUnresolve struct {
	// contains filtered or unexported fields
}

func ReadAllHostnameUnresolves 

func ReadAllHostnameUnresolves() ([]HostnameUnresolve, error)

ReadAllHostnameUnresolves returns the content of the hostname_unresolve table

func (HostnameUnresolve) String 

func (this HostnameUnresolve) String() string

type Instance 

type Instance struct {
	Key                    InstanceKey
	InstanceAlias          string
	Uptime                 uint
	ServerID               uint
	ServerUUID             string
	Version                string
	VersionComment         string
	FlavorName             string
	ReadOnly               bool
	Binlog_format          string
	BinlogRowImage         string
	LogBinEnabled          bool
	LogSlaveUpdatesEnabled bool
	SelfBinlogCoordinates  BinlogCoordinates
	MasterKey              InstanceKey
	IsDetachedMaster       bool
	Slave_SQL_Running      bool
	Slave_IO_Running       bool
	HasReplicationFilters  bool
	SupportsOracleGTID     bool
	UsingOracleGTID        bool
	UsingMariaDBGTID       bool
	UsingPseudoGTID        bool
	ReadBinlogCoordinates  BinlogCoordinates
	ExecBinlogCoordinates  BinlogCoordinates
	IsDetached             bool
	RelaylogCoordinates    BinlogCoordinates
	LastSQLError           string
	LastIOError            string
	SecondsBehindMaster    sql.NullInt64
	SQLDelay               uint
	ExecutedGtidSet        string
	GtidPurged             string

	SlaveLagSeconds                 sql.NullInt64
	SlaveHosts                      InstanceKeyMap
	ClusterName                     string
	SuggestedClusterAlias           string
	DataCenter                      string
	PhysicalEnvironment             string
	ReplicationDepth                uint
	IsCoMaster                      bool
	HasReplicationCredentials       bool
	ReplicationCredentialsAvailable bool
	SemiSyncEnforced                bool

	LastSeenTimestamp    string
	IsLastCheckValid     bool
	IsUpToDate           bool
	IsRecentlyChecked    bool
	SecondsSinceLastSeen sql.NullInt64
	CountMySQLSnapshots  int

	// Careful. IsCandidate and PromotionRule are used together
	// and probably need to be merged. IsCandidate's value may
	// be picked up from daabase_candidate_instance's value when
	// reading an instance from the db.
	IsCandidate          bool
	PromotionRule        CandidatePromotionRule
	IsDowntimed          bool
	DowntimeReason       string
	DowntimeOwner        string
	DowntimeEndTimestamp string
	UnresolvedHostname   string
	AllowTLS             bool

	LastDiscoveryLatency time.Duration
}

Instance represents a database instance, including its current configuration & status. It presents important replication configuration and detailed replication status.

func ChangeMasterCredentials 

func ChangeMasterCredentials(instanceKey *InstanceKey, masterUser string, masterPassword string) (*Instance, error)

ChangeMasterCredentials issues a CHANGE MASTER TO... MASTER_USER=, MASTER_PASSWORD=...

func ChangeMasterTo 

func ChangeMasterTo(instanceKey *InstanceKey, masterKey *InstanceKey, masterBinlogCoordinates *BinlogCoordinates, skipUnresolve bool, gtidHint OperationGTIDHint) (*Instance, error)

ChangeMasterTo changes the given instance's master according to given input.

func DetachReplica 

func DetachReplica(instanceKey *InstanceKey) (*Instance, error)

DetachReplica detaches a replica from replication; forcibly corrupting the binlog coordinates (though in such way that is reversible)

func DetachReplicaMasterHost 

func DetachReplicaMasterHost(instanceKey *InstanceKey) (*Instance, error)

DetachReplicaMasterHost detaches a replica from its master by corrupting the Master_Host (in such way that is reversible)

func DetachReplicaOperation 

func DetachReplicaOperation(instanceKey *InstanceKey) (*Instance, error)

DetachReplicaOperation will detach a replica from its master by forcibly corrupting its replication coordinates

func DisableGTID 

func DisableGTID(instanceKey *InstanceKey) (*Instance, error)

DisableGTID will attempt to disable GTID-mode (either Oracle or MariaDB) and revert to binlog file:pos replication

func EnableGTID 

func EnableGTID(instanceKey *InstanceKey) (*Instance, error)

EnableGTID will attempt to enable GTID-mode (either Oracle or MariaDB)

func FindFuzzyInstances 

func FindFuzzyInstances(fuzzyInstanceKey *InstanceKey) ([](*Instance), error)

FindFuzzyInstances return instances whose names are like the one given (host & port substrings) For example, the given `mydb-3:3306` might find `myhosts-mydb301-production.mycompany.com:3306`

func FindInstances 

func FindInstances(regexpPattern string) ([](*Instance), error)

FindInstances reads all instances whose name matches given pattern

func FlushBinaryLogs 

func FlushBinaryLogs(instanceKey *InstanceKey, count int) (*Instance, error)

FlushBinaryLogs attempts a 'FLUSH BINARY LOGS' statement on the given instance.

func FlushBinaryLogsTo 

func FlushBinaryLogsTo(instanceKey *InstanceKey, logFile string) (*Instance, error)

FlushBinaryLogsTo attempts to 'FLUSH BINARY LOGS' until given binary log is reached

func GetCandidateReplicaOfBinlogServerTopology 

func GetCandidateReplicaOfBinlogServerTopology(masterKey *InstanceKey) (candidateReplica *Instance, err error)

GetCandidateReplicaOfBinlogServerTopology chooses the best replica to promote given a (possibly dead) master

func GetClusterGhostReplicas 

func GetClusterGhostReplicas(clusterName string) (result [](*Instance), err error)

GetClusterGhostReplicas returns a list of replicas that can serve as the connected servers for a [gh-ost](https://github.com/github/gh-ost) operation. A gh-ost operation prefers to talk to a RBR replica that has no children.

func GetClusterOSCReplicas 

func GetClusterOSCReplicas(clusterName string) ([](*Instance), error)

GetClusterOSCReplicas returns a heuristic list of replicas which are fit as controll replicas for an OSC operation. These would be intermediate masters

func GetHeuristicClusterPoolInstances 

func GetHeuristicClusterPoolInstances(clusterName string, pool string) (result [](*Instance), err error)

GetHeuristicClusterPoolInstances returns instances of a cluster which are also pooled. If `pool` argument is empty, all pools are considered, otherwise, only instances of given pool are considered.

func GetInstanceMaster 

func GetInstanceMaster(instance *Instance) (*Instance, error)

GetInstanceMaster synchronously reaches into the replication topology and retrieves master's data

func GetSortedReplicas 

func GetSortedReplicas(masterKey *InstanceKey, stopReplicationMethod StopReplicationMethod) (replicas [](*Instance), err error)

GetSortedReplicas reads list of replicas of a given master, and returns them sorted by exec coordinates (most up-to-date replica first).

func KillQuery 

func KillQuery(instanceKey *InstanceKey, process int64) (*Instance, error)

KillQuery stops replication on a given instance

func MakeCoMaster 

func MakeCoMaster(instanceKey *InstanceKey) (*Instance, error)

MakeCoMaster will attempt to make an instance co-master with its master, by making its master a replica of its own. This only works out if the master is not replicating; the master does not have a known master (it may have an unknown master).

func MakeLocalMaster 

func MakeLocalMaster(instanceKey *InstanceKey) (*Instance, error)

MakeLocalMaster promotes a replica above its master, making it replica of its grandparent, while also enslaving its siblings. This serves as a convenience method to recover replication when a local master fails; the instance promoted is one of its replicas, which is most advanced among its siblings. This method utilizes Pseudo GTID

func MakeMaster 

func MakeMaster(instanceKey *InstanceKey) (*Instance, error)

MakeMaster will take an instance, make all its siblings its replicas (via pseudo-GTID) and make it master (stop its replicaiton, make writeable).

func MasterPosWait 

func MasterPosWait(instanceKey *InstanceKey, binlogCoordinates *BinlogCoordinates) (*Instance, error)

MasterPosWait issues a MASTER_POS_WAIT() an given instance according to given coordinates.

func MoveBelow 

func MoveBelow(instanceKey, siblingKey *InstanceKey) (*Instance, error)

MoveBelow will attempt moving instance indicated by instanceKey below its supposed sibling indicated by sinblingKey. It will perform all safety and sanity checks and will tamper with this instance's replication as well as its sibling.

func MoveBelowGTID 

func MoveBelowGTID(instanceKey, otherKey *InstanceKey) (*Instance, error)

MoveBelowGTID will attempt moving instance indicated by instanceKey below another instance using either Oracle GTID or MariaDB GTID.

func MoveEquivalent 

func MoveEquivalent(instanceKey, otherKey *InstanceKey) (*Instance, error)

MoveEquivalent will attempt moving instance indicated by instanceKey below another instance, based on known master coordinates equivalence

func MoveUp 

func MoveUp(instanceKey *InstanceKey) (*Instance, error)

MoveUp will attempt moving instance indicated by instanceKey up the topology hierarchy. It will perform all safety and sanity checks and will tamper with this instance's replication as well as its master.

func NewInstance 

func NewInstance() *Instance

NewInstance creates a new, empty instance

func PurgeBinaryLogsTo 

func PurgeBinaryLogsTo(instanceKey *InstanceKey, logFile string) (*Instance, error)

FlushBinaryLogsTo attempts to 'PURGE BINARY LOGS' until given binary log is reached

func PurgeBinaryLogsToCurrent 

func PurgeBinaryLogsToCurrent(instanceKey *InstanceKey) (*Instance, error)

FlushBinaryLogsTo attempts to 'PURGE BINARY LOGS' until given binary log is reached

func ReadBinlogServerReplicaInstances 

func ReadBinlogServerReplicaInstances(masterKey *InstanceKey) ([](*Instance), error)

ReadBinlogServerReplicaInstances reads direct replicas of a given master that are binlog servers

func ReadClusterCandidateInstances 

func ReadClusterCandidateInstances(clusterName string) ([](*Instance), error)

ReadClusterCandidateInstances reads cluster instances which are also marked as candidates

func ReadClusterInstances 

func ReadClusterInstances(clusterName string) ([](*Instance), error)

ReadClusterInstances reads all instances of a given cluster

func ReadClusterWriteableMaster 

func ReadClusterWriteableMaster(clusterName string) ([](*Instance), error)

ReadClusterWriteableMaster returns the/a writeable master of this cluster Typically, the cluster name indicates the master of the cluster. However, in circular master-master replication one master can assume the name of the cluster, and it is not guaranteed that it is the writeable one.

func ReadFuzzyInstance 

func ReadFuzzyInstance(fuzzyInstanceKey *InstanceKey) (*Instance, error)

ReadFuzzyInstance accepts a fuzzy instance key and expects to return a single instance. Multiple instances matching the fuzzy keys are not allowed.

func ReadHistoryClusterInstances 

func ReadHistoryClusterInstances(clusterName string, historyTimestampPattern string) ([](*Instance), error)

ReadHistoryClusterInstances reads (thin) instances from history

func ReadInstance 

func ReadInstance(instanceKey *InstanceKey) (*Instance, bool, error)

ReadInstance reads an instance from the orchestrator backend database

func ReadLostInRecoveryInstances 

func ReadLostInRecoveryInstances(clusterName string) ([](*Instance), error)

ReadLostInRecoveryInstances returns all instances (potentially filtered by cluster) which are currently indicated as downtimed due to being lost during a topology recovery. Keep in mind: - instances are only marked as such when config's MasterFailoverLostInstancesDowntimeMinutes > 0 - The downtime expires at some point

func ReadProblemInstances 

func ReadProblemInstances(clusterName string) ([](*Instance), error)

ReadProblemInstances reads all instances with problems

func ReadReplicaInstances 

func ReadReplicaInstances(masterKey *InstanceKey) ([](*Instance), error)

ReadReplicaInstances reads replicas of a given master

func ReadReplicaInstancesIncludingBinlogServerSubReplicas 

func ReadReplicaInstancesIncludingBinlogServerSubReplicas(masterKey *InstanceKey) ([](*Instance), error)

ReadReplicaInstancesIncludingBinlogServerSubReplicas returns a list of direct slves including any replicas of a binlog server replica

func ReadTopologyInstance 

func ReadTopologyInstance(instanceKey *InstanceKey) (*Instance, error)

ReadTopologyInstance collects information on the state of a MySQL server and writes the result synchronously to the orchestrator backend.

func ReadTopologyInstanceBufferable 

func ReadTopologyInstanceBufferable(instanceKey *InstanceKey, bufferWrites bool, latency *stopwatch.NamedStopwatch) (*Instance, error)

ReadTopologyInstanceBufferable connects to a topology MySQL instance and collects information on the server and its replication state. It writes the information retrieved into orchestrator's backend. - writes are optionally buffered. - timing information can be collected for the stages performed.

func ReadUnseenInstances 

func ReadUnseenInstances() ([](*Instance), error)

ReadUnseenInstances reads all instances which were not recently seen

func ReadWriteableClustersMasters 

func ReadWriteableClustersMasters() (instances [](*Instance), err error)

ReadWriteableClustersMasters returns writeable masters of all clusters, but only one per cluster, in similar logic to ReadClusterWriteableMaster

func ReattachReplica 

func ReattachReplica(instanceKey *InstanceKey) (*Instance, error)

ReattachReplica restores a detached replica back into replication

func ReattachReplicaMasterHost 

func ReattachReplicaMasterHost(instanceKey *InstanceKey) (*Instance, error)

ReattachReplicaMasterHost reattaches a replica back onto its master by undoing a DetachReplicaMasterHost operation

func ReattachReplicaOperation 

func ReattachReplicaOperation(instanceKey *InstanceKey) (*Instance, error)

ReattachReplicaOperation will detach a replica from its master by forcibly corrupting its replication coordinates

func RefreshInstanceSlaveHosts 

func RefreshInstanceSlaveHosts(instanceKey *InstanceKey) (*Instance, error)

RefreshInstanceSlaveHosts is a workaround for a bug in MySQL where SHOW SLAVE HOSTS continues to present old, long disconnected replicas. It turns out issuing a couple FLUSH commands mitigates the problem.

func RefreshTopologyInstance 

func RefreshTopologyInstance(instanceKey *InstanceKey) (*Instance, error)

RefreshTopologyInstance will synchronuously re-read topology instance

func RelocateBelow 

func RelocateBelow(instanceKey, otherKey *InstanceKey) (*Instance, error)

RelocateBelow will attempt moving instance indicated by instanceKey below another instance. Orchestrator will try and figure out the best way to relocate the server. This could span normal binlog-position, pseudo-gtid, repointing, binlog servers...

func RemoveBinlogServerInstances 

func RemoveBinlogServerInstances(instances [](*Instance)) [](*Instance)

removeBinlogServerInstances will remove all binlog servers from given lsit

func RemoveInstance 

func RemoveInstance(instances [](*Instance), instanceKey *InstanceKey) [](*Instance)

removeInstance will remove an instance from a list of instances

func RemoveNilInstances 

func RemoveNilInstances(instances [](*Instance)) [](*Instance)

removeNilInstances

func Repoint 

func Repoint(instanceKey *InstanceKey, masterKey *InstanceKey, gtidHint OperationGTIDHint) (*Instance, error)

Repoint connects a replica to a master using its exact same executing coordinates. The given masterKey can be null, in which case the existing master is used. Two use cases: - masterKey is nil: use case is corrupted relay logs on replica - masterKey is not nil: using Binlog servers (coordinates remain the same)

func RepointReplicas 

func RepointReplicas(instanceKey *InstanceKey, pattern string) ([](*Instance), error, []error)

RepointReplicas repoints all replicas of a given instance onto its existing master.

func RepointReplicasTo 

func RepointReplicasTo(instanceKey *InstanceKey, pattern string, belowKey *InstanceKey) ([](*Instance), error, []error)

RepointReplicasTo repoints replicas of a given instance (possibly filtered) onto another master. Binlog Server is the major use case

func RepointTo 

func RepointTo(replicas [](*Instance), belowKey *InstanceKey) ([](*Instance), error, []error)

RepointTo repoints list of replicas onto another master. Binlog Server is the major use case

func ResetMaster 

func ResetMaster(instanceKey *InstanceKey) (*Instance, error)

ResetMaster issues a RESET MASTER statement on given instance. Use with extreme care!

func ResetMasterGTIDOperation 

func ResetMasterGTIDOperation(instanceKey *InstanceKey, removeSelfUUID bool, uuidToRemove string) (*Instance, error)

ResetMasterGTIDOperation will issue a safe RESET MASTER on a replica that replicates via GTID: It will make sure the gtid_purged set matches the executed set value as read just before the RESET. this will enable new replicas to be attached to given instance without complaints about missing/purged entries. This function requires that the instance does not have replicas.

func ResetSlave 

func ResetSlave(instanceKey *InstanceKey) (*Instance, error)

ResetSlave resets a replica, breaking the replication

func ResetSlaveOperation 

func ResetSlaveOperation(instanceKey *InstanceKey) (*Instance, error)

ResetSlaveOperation will reset a replica

func RestartSlave 

func RestartSlave(instanceKey *InstanceKey) (instance *Instance, err error)

RestartSlave stops & starts replication on a given instance

func SearchInstances 

func SearchInstances(searchString string) ([](*Instance), error)

SearchInstances reads all instances qualifying for some searchString

func SetReadOnly 

func SetReadOnly(instanceKey *InstanceKey, readOnly bool) (*Instance, error)

SetReadOnly sets or clears the instance's global read_only variable

func SkipQuery 

func SkipQuery(instanceKey *InstanceKey) (*Instance, error)

SkipQuery skip a single query in a failed replication instance

func SkipToNextBinaryLog 

func SkipToNextBinaryLog(instanceKey *InstanceKey) (*Instance, error)

SkipToNextBinaryLog changes master position to beginning of next binlog USE WITH CARE! Use case is binlog servers where the master was gone & replaced by another.

func StartSlave 

func StartSlave(instanceKey *InstanceKey) (*Instance, error)

StartSlave starts replication on a given instance.

func StartSlaveUntilMasterCoordinates 

func StartSlaveUntilMasterCoordinates(instanceKey *InstanceKey, masterCoordinates *BinlogCoordinates) (*Instance, error)

StartSlaveUntilMasterCoordinates issuesa START SLAVE UNTIL... statement on given instance

func StopSlave 

func StopSlave(instanceKey *InstanceKey) (*Instance, error)

StopSlave stops replication on a given instance

func StopSlaveNicely 

func StopSlaveNicely(instanceKey *InstanceKey, timeout time.Duration) (*Instance, error)

StopSlaveNicely stops a replica such that SQL_thread and IO_thread are aligned (i.e. SQL_thread consumes all relay log entries) It will actually START the sql_thread even if the replica is completely stopped.

func StopSlaves 

func StopSlaves(replicas [](*Instance), stopReplicationMethod StopReplicationMethod, timeout time.Duration) [](*Instance)

StopSlaves will stop replication concurrently on given set of replicas. It will potentially do nothing, or attempt to stop _nicely_ or just stop normally, all according to stopReplicationMethod

func StopSlavesNicely 

func StopSlavesNicely(replicas [](*Instance), timeout time.Duration) [](*Instance)

StopSlavesNicely will attemt to stop all given replicas nicely, up to timeout

func TakeMaster 

func TakeMaster(instanceKey *InstanceKey) (*Instance, error)

TakeMaster will move an instance up the chain and cause its master to become its replica. It's almost a role change, just that other replicas of either 'instance' or its master are currently unaffected (they continue replicate without change) Note that the master must itself be a replica; however the grandparent does not necessarily have to be reachable and can in fact be dead.

func TakeSiblings 

func TakeSiblings(instanceKey *InstanceKey) (*Instance, int, error)

TakeSiblings is a convenience method for turning sublings of a replica to be its subordinates. This uses normal connected replication (does not utilize Pseudo-GTID)

func (*Instance) AddReplicaKey 

func (this *Instance) AddReplicaKey(replicaKey *InstanceKey)

AddReplicaKey adds a replica to the list of this instance's replicas.

func (*Instance) CanMove 

func (this *Instance) CanMove() (bool, error)

CanMove returns true if this instance's state allows it to be repositioned. For example, if this instance lags too much, it will not be moveable.

func (*Instance) CanMoveAsCoMaster 

func (this *Instance) CanMoveAsCoMaster() (bool, error)

CanMoveAsCoMaster returns true if this instance's state allows it to be repositioned.

func (*Instance) CanMoveViaMatch 

func (this *Instance) CanMoveViaMatch() (bool, error)

CanMoveViaMatch returns true if this instance's state allows it to be repositioned via pseudo-GTID matching

func (*Instance) CanReplicateFrom 

func (this *Instance) CanReplicateFrom(other *Instance) (bool, error)

CanReplicateFrom uses heursitics to decide whether this instacne can practically replicate from other instance. Checks are made to binlog format, version number, binary logs etc.

func (*Instance) Equals 

func (this *Instance) Equals(other *Instance) bool

Equals tests that this instance is the same instance as other. The function does not test configuration or status.

func (*Instance) FlavorNameAndMajorVersion 

func (this *Instance) FlavorNameAndMajorVersion() string

FlavorNameAndMajorVersion returns a string of the combined flavor and major version which is useful in some checks.

func (*Instance) GetNextBinaryLog 

func (this *Instance) GetNextBinaryLog(binlogCoordinates BinlogCoordinates) (BinlogCoordinates, error)

GetNextBinaryLog returns the successive, if any, binary log file to the one given

func (*Instance) HasReasonableMaintenanceReplicationLag 

func (this *Instance) HasReasonableMaintenanceReplicationLag() bool

HasReasonableMaintenanceReplicationLag returns true when the replica lag is reasonable, and maintenance operations should have a green light to go.

func (*Instance) HumanReadableDescription 

func (this *Instance) HumanReadableDescription() string

HumanReadableDescription returns a simple readable string describing the status, version, etc. properties of this instance

func (*Instance) IsBinlogServer 

func (this *Instance) IsBinlogServer() bool

IsBinlogServer checks whether this is any type of a binlog server (currently only maxscale)

func (*Instance) IsMariaDB 

func (this *Instance) IsMariaDB() bool

IsMariaDB checks whether this is any version of MariaDB

func (*Instance) IsMasterOf 

func (this *Instance) IsMasterOf(replica *Instance) bool

IsReplicaOf returns true if this i supposed master of given replica

func (*Instance) IsMySQL51 

func (this *Instance) IsMySQL51() bool

func (*Instance) IsMySQL55 

func (this *Instance) IsMySQL55() bool

func (*Instance) IsMySQL56 

func (this *Instance) IsMySQL56() bool

func (*Instance) IsMySQL57 

func (this *Instance) IsMySQL57() bool

func (*Instance) IsMySQL80 

func (this *Instance) IsMySQL80() bool

func (*Instance) IsOracleMySQL 

func (this *Instance) IsOracleMySQL() bool

IsOracleMySQL checks whether this is an Oracle MySQL distribution

func (*Instance) IsPercona 

func (this *Instance) IsPercona() bool

IsPercona checks whether this is any version of Percona Server

func (*Instance) IsReplica 

func (this *Instance) IsReplica() bool

IsReplica makes simple heuristics to decide whether this insatnce is a replica of another instance

func (*Instance) IsReplicaOf 

func (this *Instance) IsReplicaOf(master *Instance) bool

IsReplicaOf returns true if this instance claims to replicate from given master

func (*Instance) IsSmallerBinlogFormat 

func (this *Instance) IsSmallerBinlogFormat(other *Instance) bool

IsSmallerBinlogFormat returns true when this instance's binlgo format is "smaller" than the other's, i.e. binary logs cannot flow from the other instance to this one

func (*Instance) IsSmallerMajorVersion 

func (this *Instance) IsSmallerMajorVersion(other *Instance) bool

IsSmallerMajorVersion tests this instance against another and returns true if this instance is of a smaller "major" varsion. e.g. 5.5.36 is NOT a smaller major version as comapred to 5.5.36, but IS as compared to 5.6.9

func (*Instance) IsSmallerMajorVersionByString 

func (this *Instance) IsSmallerMajorVersionByString(otherVersion string) bool

IsSmallerMajorVersionByString cehcks if this instance has a smaller major version number than given one

func (*Instance) LagStatusString 

func (this *Instance) LagStatusString() string

LagStatusString returns a human readable representation of current lag

func (*Instance) MajorVersion 

func (this *Instance) MajorVersion() []string

MajorVersion returns this instance's major version number (e.g. for 5.5.36 it returns "5.5")

func (*Instance) MajorVersionString 

func (this *Instance) MajorVersionString() string

MajorVersion returns this instance's major version number (e.g. for 5.5.36 it returns "5.5")

func (*Instance) NextGTID 

func (this *Instance) NextGTID() (string, error)

NextGTID returns the next (Oracle) GTID to be executed. Useful for skipping queries

func (*Instance) ReplicaRunning 

func (this *Instance) ReplicaRunning() bool

ReplicaRunning returns true when this instance's status is of a replicating replica.

func (*Instance) SQLThreadUpToDate 

func (this *Instance) SQLThreadUpToDate() bool

SQLThreadUpToDate returns true when the instance had consumed all relay logs.

func (*Instance) StatusString 

func (this *Instance) StatusString() string

StatusString returns a human readable description of this instance's status

func (*Instance) UsingGTID 

func (this *Instance) UsingGTID() bool

UsingGTID returns true when this replica is currently replicating via GTID (either Oracle or MariaDB)

type InstanceBinlogCoordinates 

type InstanceBinlogCoordinates struct {
	Key         InstanceKey
	Coordinates BinlogCoordinates
}

InstanceBinlogCoordinates is a convenice wrapper for instance key + binlog coordinates

func GetEquivalentMasterCoordinates 

func GetEquivalentMasterCoordinates(instanceCoordinates *InstanceBinlogCoordinates) (result [](*InstanceBinlogCoordinates), err error)

type InstanceKey 

type InstanceKey struct {
	Hostname string
	Port     int
}

InstanceKey is an instance indicator, identifued by hostname and port

func BulkReadInstance 

func BulkReadInstance() ([](*InstanceKey), error)

BulkReadInstance returns a list of all instances from the database

  • I only need the Hostname and Port fields.
  • I must use readInstancesByCondition to ensure all column settings are correct.

func GetHeuristicClusterDomainInstanceAttribute 

func GetHeuristicClusterDomainInstanceAttribute(clusterName string) (instanceKey *InstanceKey, err error)

GetHeuristicClusterDomainInstanceAttribute attempts detecting the cluster domain for the given cluster, and return the instance key associated as writer with that domain

func HeuristicallyApplyClusterDomainInstanceAttribute 

func HeuristicallyApplyClusterDomainInstanceAttribute(clusterName string) (instanceKey *InstanceKey, err error)

HeuristicallyApplyClusterDomainInstanceAttribute writes down the cluster-domain to master-hostname as a general attribute, by reading current topology and **trusting** it to be correct

func NewInstanceKeyFromStrings 

func NewInstanceKeyFromStrings(hostname string, port string) (*InstanceKey, error)

NewInstanceKeyFromStrings creates a new InstanceKey by resolving hostname and port. hostname is normalized via ResolveHostname. port is tested to be valid integer.

func NewRawInstanceKey 

func NewRawInstanceKey(hostPort string) (*InstanceKey, error)

ParseInstanceKey will parse an InstanceKey from a string representation such as 127.0.0.1:3306

func ParseInstanceKey 

func ParseInstanceKey(hostPort string) (*InstanceKey, error)

ParseInstanceKey will parse an InstanceKey from a string representation such as 127.0.0.1:3306

func ParseInstanceKeyLoose 

func ParseInstanceKeyLoose(hostPort string) (*InstanceKey, error)

ParseInstanceKeyLoose will parse an InstanceKey from a string representation such as 127.0.0.1:3306. The port part is optional

func ParseRawInstanceKeyLoose 

func ParseRawInstanceKeyLoose(hostPort string) (*InstanceKey, error)

ParseRawInstanceKeyLoose will parse an InstanceKey from a string representation such as 127.0.0.1:3306. The port part is optional; there will be no name resolve

func ReadFuzzyInstanceKey 

func ReadFuzzyInstanceKey(fuzzyInstanceKey *InstanceKey) *InstanceKey

ReadFuzzyInstanceKey accepts a fuzzy instance key and expects to return a single, fully qualified, known instance key.

func ReadFuzzyInstanceKeyIfPossible 

func ReadFuzzyInstanceKeyIfPossible(fuzzyInstanceKey *InstanceKey) *InstanceKey

ReadFuzzyInstanceKeyIfPossible accepts a fuzzy instance key and hopes to return a single, fully qualified, known instance key, or else the original given key

func ReadMaintenanceInstanceKey 

func ReadMaintenanceInstanceKey(maintenanceToken int64) (*InstanceKey, error)

ReadMaintenanceInstanceKey will return the instanceKey for active maintenance by maintenanceToken

func ReadOutdatedInstanceKeys 

func ReadOutdatedInstanceKeys() ([]InstanceKey, error)

ReadOutdatedInstanceKeys reads and returns keys for all instances that are not up to date (i.e. pre-configured time has passed since they were last checked) But we also check for the case where an attempt at instance checking has been made, that hasn't resulted in an actual check! This can happen when TCP/IP connections are hung, in which case the "check" never returns. In such case we multiply interval by a factor, so as not to open too many connections on the instance.

func UnresolveHostname 

func UnresolveHostname(instanceKey *InstanceKey) (InstanceKey, bool, error)

func (*InstanceKey) DetachedKey 

func (this *InstanceKey) DetachedKey() *InstanceKey

DetachedKey returns an instance key whose hostname is detahced: invalid, but recoverable

func (*InstanceKey) DisplayString 

func (this *InstanceKey) DisplayString() string

DisplayString returns a user-friendly string representation of this key

func (*InstanceKey) Equals 

func (this *InstanceKey) Equals(other *InstanceKey) bool

Equals tests equality between this key and another key

func (*InstanceKey) Formalize 

func (this *InstanceKey) Formalize() *InstanceKey

Formalize this key by getting CNAME for hostname

func (*InstanceKey) IsDetached 

func (this *InstanceKey) IsDetached() bool

IsDetached returns 'true' when this hostname is logically "detached"

func (*InstanceKey) IsValid 

func (this *InstanceKey) IsValid() bool

IsValid uses simple heuristics to see whether this key represents an actual instance

func (*InstanceKey) ReattachedKey 

func (this *InstanceKey) ReattachedKey() *InstanceKey

ReattachedKey returns an instance key whose hostname is detahced: invalid, but recoverable

func (*InstanceKey) SmallerThan 

func (this *InstanceKey) SmallerThan(other *InstanceKey) bool

SmallerThan returns true if this key is dictionary-smaller than another. This is used for consistent sorting/ordering; there's nothing magical about it.

func (InstanceKey) String 

func (this InstanceKey) String() string

String returns a user-friendly string representation of this key

func (*InstanceKey) StringCode 

func (this *InstanceKey) StringCode() string

StringCode returns an official string representation of this key

type InstanceKeyMap 

type InstanceKeyMap map[InstanceKey]bool

InstanceKeyMap is a convenience struct for listing InstanceKey-s

func NewInstanceKeyMap 

func NewInstanceKeyMap() *InstanceKeyMap

func (*InstanceKeyMap) AddInstances 

func (this *InstanceKeyMap) AddInstances(instances [](*Instance))

AddInstances adds keys of all given instances to this map

func (*InstanceKeyMap) AddKey 

func (this *InstanceKeyMap) AddKey(key InstanceKey)

AddKey adds a single key to this map

func (*InstanceKeyMap) AddKeys 

func (this *InstanceKeyMap) AddKeys(keys []InstanceKey)

AddKeys adds all given keys to this map

func (*InstanceKeyMap) GetInstanceKeys 

func (this *InstanceKeyMap) GetInstanceKeys() []InstanceKey

GetInstanceKeys returns keys in this map in the form of an array

func (*InstanceKeyMap) HasKey 

func (this *InstanceKeyMap) HasKey(key InstanceKey) bool

HasKey checks if given key is within the map

func (*InstanceKeyMap) MarshalJSON 

func (this *InstanceKeyMap) MarshalJSON() ([]byte, error)

MarshalJSON will marshal this map as JSON

func (*InstanceKeyMap) ReadCommaDelimitedList 

func (this *InstanceKeyMap) ReadCommaDelimitedList(list string) error

ReadJson unmarshalls a json into this map

func (*InstanceKeyMap) ReadJson 

func (this *InstanceKeyMap) ReadJson(jsonString string) error

ReadJson unmarshalls a json into this map

func (*InstanceKeyMap) ToCommaDelimitedList 

func (this *InstanceKeyMap) ToCommaDelimitedList() string

ToCommaDelimitedList will export this map in comma delimited format

func (*InstanceKeyMap) ToJSON 

func (this *InstanceKeyMap) ToJSON() (string, error)

ToJSON will marshal this map as JSON

func (*InstanceKeyMap) ToJSONString 

func (this *InstanceKeyMap) ToJSONString() string

ToJSONString will marshal this map as JSON

type InstancesByCountSlaveHosts 

type InstancesByCountSlaveHosts [](*Instance)

InstancesByCountSlaveHosts is a sortable type for Instance

func (InstancesByCountSlaveHosts) Len 

func (this InstancesByCountSlaveHosts) Len() int

func (InstancesByCountSlaveHosts) Less 

func (this InstancesByCountSlaveHosts) Less(i, j int) bool

func (InstancesByCountSlaveHosts) Swap 

func (this InstancesByCountSlaveHosts) Swap(i, j int)

type InstancesSorterByExec 

type InstancesSorterByExec struct {
	// contains filtered or unexported fields
}

func NewInstancesSorterByExec 

func NewInstancesSorterByExec(instances [](*Instance), dataCenter string) *InstancesSorterByExec

func (*InstancesSorterByExec) Len 

func (this *InstancesSorterByExec) Len() int

func (*InstancesSorterByExec) Less 

func (this *InstancesSorterByExec) Less(i, j int) bool

func (*InstancesSorterByExec) Swap 

func (this *InstancesSorterByExec) Swap(i, j int)

type Maintenance 

type Maintenance struct {
	MaintenanceId  uint
	Key            InstanceKey
	BeginTimestamp string
	SecondsElapsed uint
	IsActive       bool
	Owner          string
	Reason         string
}

Maintenance indicates a maintenance entry (also in the database)

func ReadActiveMaintenance 

func ReadActiveMaintenance() ([]Maintenance, error)

ReadActiveMaintenance returns the list of currently active maintenance entries

type OperationGTIDHint 

type OperationGTIDHint string

type OracleGtidSet 

type OracleGtidSet struct {
	GtidEntries [](*OracleGtidSetEntry)
}

OracleGtidSet represents a set of GTID ranges as depicted by Retrieved_Gtid_Set, Executed_Gtid_Set or @@gtid_purged.

func ParseGtidSet 

func ParseGtidSet(gtidSet string) (res *OracleGtidSet, err error)

Example input: `230ea8ea-81e3-11e4-972a-e25ec4bd140a:1-10539, 316d193c-70e5-11e5-adb2-ecf4bb2262ff:1-8935:8984-6124596, 321f5c0d-70e5-11e5-adb2-ecf4bb2262ff:1-56`

func (*OracleGtidSet) RemoveUUID 

func (this *OracleGtidSet) RemoveUUID(uuid string) (removed bool)

RemoveUUID removes entries that belong to given UUID. By way of how this works there can only be one entry matching our UUID, but we generalize. We keep order of entries.

func (OracleGtidSet) String 

func (this OracleGtidSet) String() string

type OracleGtidSetEntry 

type OracleGtidSetEntry struct {
	UUID   string
	Ranges string
}

OracleGtidSetEntry represents an entry in a set of GTID ranges, for example, the entry: "316d193c-70e5-11e5-adb2-ecf4bb2262ff:1-8935:8984-6124596" (may include gaps)

func NewOracleGtidSetEntry 

func NewOracleGtidSetEntry(gtidRangeString string) (*OracleGtidSetEntry, error)

NewOracleGtidSetEntry parses a single entry text

func (OracleGtidSetEntry) String 

func (this OracleGtidSetEntry) String() string

String returns a user-friendly string representation of this entry

type PoolInstancesMap 

type PoolInstancesMap map[string]([]*InstanceKey)

PoolInstancesMap lists instance keys per pool name

func ReadClusterPoolInstancesMap 

func ReadClusterPoolInstancesMap(clusterName string, pool string) (*PoolInstancesMap, error)

ReadClusterPoolInstancesMap returns association of pools-to-instances for a given cluster and potentially for a given pool.

type PostponedFunctionsContainer 

type PostponedFunctionsContainer struct {
	// contains filtered or unexported fields
}

func NewPostponedFunctionsContainer 

func NewPostponedFunctionsContainer() *PostponedFunctionsContainer

func (*PostponedFunctionsContainer) AddPostponedFunction 

func (this *PostponedFunctionsContainer) AddPostponedFunction(postponedFunction func() error)

func (*PostponedFunctionsContainer) Len 

func (this *PostponedFunctionsContainer) Len() int64

func (*PostponedFunctionsContainer) Wait 

func (this *PostponedFunctionsContainer) Wait()

type Process 

type Process struct {
	InstanceHostname string
	InstancePort     int
	Id               int64
	User             string
	Host             string
	Db               string
	Command          string
	Time             int64
	State            string
	Info             string
	StartedAt        string
}

Process presents a MySQL executing thread (as observed by PROCESSLIST)

func ReadLongRunningProcesses 

func ReadLongRunningProcesses(filter string) ([]Process, error)

ReadLongRunningProcesses returns the list of current known long running processes of all instances

type ReplicationAnalysis 

type ReplicationAnalysis struct {
	AnalyzedInstanceKey                       InstanceKey
	AnalyzedInstanceMasterKey                 InstanceKey
	ClusterDetails                            ClusterInfo
	IsMaster                                  bool
	IsCoMaster                                bool
	LastCheckValid                            bool
	CountReplicas                             uint
	CountValidReplicas                        uint
	CountValidReplicatingReplicas             uint
	CountReplicasFailingToConnectToMaster     uint
	CountStaleReplicas                        uint
	ReplicationDepth                          uint
	SlaveHosts                                InstanceKeyMap
	IsFailingToConnectToMaster                bool
	Analysis                                  AnalysisCode
	Description                               string
	StructureAnalysis                         []StructureAnalysisCode
	IsDowntimed                               bool
	DowntimeEndTimestamp                      string
	DowntimeRemainingSeconds                  int
	IsBinlogServer                            bool
	PseudoGTIDImmediateTopology               bool
	OracleGTIDImmediateTopology               bool
	MariaDBGTIDImmediateTopology              bool
	BinlogServerImmediateTopology             bool
	CountStatementBasedLoggingReplicas        uint
	CountMixedBasedLoggingReplicas            uint
	CountRowBasedLoggingReplicas              uint
	CountDistinctMajorVersionsLoggingReplicas uint
}

ReplicationAnalysis notes analysis on replication chain status, per instance

func GetReplicationAnalysis 

func GetReplicationAnalysis(clusterName string, includeDowntimed bool, auditAnalysis bool) ([]ReplicationAnalysis, error)

GetReplicationAnalysis will check for replication problems (dead master; unreachable master; etc)

func (*ReplicationAnalysis) AnalysisString 

func (this *ReplicationAnalysis) AnalysisString() string

AnalysisString returns a human friendly description of all analysis issues

func (*ReplicationAnalysis) ReadReplicaHostsFromString 

func (this *ReplicationAnalysis) ReadReplicaHostsFromString(replicaHostsString string) error

ReadReplicaHostsFromString parses and reads replica keys from comma delimited string

type ReplicationAnalysisChangelog 

type ReplicationAnalysisChangelog struct {
	AnalyzedInstanceKey InstanceKey
	Changelog           []string
}

func ReadReplicationAnalysisChangelog 

func ReadReplicationAnalysisChangelog() (res [](*ReplicationAnalysisChangelog), err error)

ReadReplicationAnalysisChangelog

type StopReplicationMethod 

type StopReplicationMethod string

type StructureAnalysisCode 

type StructureAnalysisCode string

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