Documentation
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Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type CLIFlags ¶
type CLIFlags struct {
Noop *bool
SkipUnresolve *bool
SkipUnresolveCheck *bool
BinlogFile *string
Databaseless *bool
GrabElection *bool
}
CLIFlags stores some command line flags that are globally available in the process' lifetime
var RuntimeCLIFlags CLIFlags
type Configuration ¶
type Configuration struct {
Debug bool // set debug mode (similar to --debug option)
EnableSyslog bool // Should logs be directed (in addition) to syslog daemon?
ListenAddress string
AgentsServerPort string // port orchestrator agents talk back to
MySQLTopologyUser string
MySQLTopologyPassword string // my.cnf style configuration file from where to pick credentials. Expecting `user`, `password` under `[client]` section
MySQLTopologyCredentialsConfigFile string
MySQLTopologySSLPrivateKeyFile string // Private key file used to authenticate with a Topology mysql instance with TLS
MySQLTopologySSLCertFile string // Certificate PEM file used to authenticate with a Topology mysql instance with TLS
MySQLTopologySSLCAFile string // Certificate Authority PEM file used to authenticate with a Topology mysql instance with TLS
MySQLTopologySSLSkipVerify bool // If true, do not strictly validate mutual TLS certs for Topology mysql instances
MySQLTopologyUseMutualTLS bool // Turn on TLS authentication with the Topology MySQL instances
MySQLTopologyMaxPoolConnections int // Max concurrent connections on any topology instance
DatabaselessMode__experimental bool // !!!EXPERIMENTAL!!! Orchestrator will execute without speaking to a backend database; super-standalone mode
MySQLOrchestratorHost string
MySQLOrchestratorPort uint
MySQLOrchestratorDatabase string
MySQLOrchestratorUser string
MySQLOrchestratorPassword string
MySQLOrchestratorCredentialsConfigFile string // my.cnf style configuration file from where to pick credentials. Expecting `user`, `password` under `[client]` section
MySQLOrchestratorSSLPrivateKeyFile string // Private key file used to authenticate with the Orchestrator mysql instance with TLS
MySQLOrchestratorSSLCertFile string // Certificate PEM file used to authenticate with the Orchestrator mysql instance with TLS
MySQLOrchestratorSSLCAFile string // Certificate Authority PEM file used to authenticate with the Orchestrator mysql instance with TLS
MySQLOrchestratorSSLSkipVerify bool // If true, do not strictly validate mutual TLS certs for the Orchestrator mysql instances
MySQLOrchestratorUseMutualTLS bool // Turn on TLS authentication with the Orchestrator MySQL instance
MySQLConnectTimeoutSeconds int // Number of seconds before connection is aborted (driver-side)
DefaultInstancePort int // In case port was not specified on command line
SkipOrchestratorDatabaseUpdate bool // When false, orchestrator will attempt to create & update all tables in backend database; when true, this is skipped. It makes sense to skip on command-line invocations and to enable for http or occasional invocations, or just after upgrades
SmartOrchestratorDatabaseUpdate bool // When true, orchestrator deploys internal schema based on deployment history, and only applies changes known to be uncommitted
SlaveLagQuery string // custom query to check on slave lg (e.g. heartbeat table)
SlaveStartPostWaitMilliseconds int // Time to wait after START SLAVE before re-readong instance (give slave chance to connect to master)
DiscoverByShowSlaveHosts bool // Attempt SHOW SLAVE HOSTS before PROCESSLIST
InstancePollSeconds uint // Number of seconds between instance reads
ReadLongRunningQueries bool // Whether orchestrator should read and record current long running executing queries.
UnseenInstanceForgetHours uint // Number of hours after which an unseen instance is forgotten
SnapshotTopologiesIntervalHours uint // Interval in hour between snapshot-topologies invocation. Default: 0 (disabled)
DiscoveryPollSeconds uint // Auto/continuous discovery of instances sleep time between polls
InstanceBulkOperationsWaitTimeoutSeconds uint // Time to wait on a single instance when doing bulk (many instances) operation
ActiveNodeExpireSeconds uint // Maximum time to wait for active node to send keepalive before attempting to take over as active node.
HostnameResolveMethod string // Method by which to "normalize" hostname ("none"/"default"/"cname")
MySQLHostnameResolveMethod string // Method by which to "normalize" hostname via MySQL server. ("none"/"@@hostname"/"@@report_host"; default "@@hostname")
SkipBinlogServerUnresolveCheck bool // Skip the double-check that an unresolved hostname resolves back to same hostname for binlog servers
ExpiryHostnameResolvesMinutes int // Number of minutes after which to expire hostname-resolves
RejectHostnameResolvePattern string // Regexp pattern for resolved hostname that will not be accepted (not cached, not written to db). This is done to avoid storing wrong resolves due to network glitches.
ReasonableReplicationLagSeconds int // Above this value is considered a problem
ProblemIgnoreHostnameFilters []string // Will minimize problem visualization for hostnames matching given regexp filters
VerifyReplicationFilters bool // Include replication filters check before approving topology refactoring
MaintenanceOwner string // (Default) name of maintenance owner to use if none provided
ReasonableMaintenanceReplicationLagSeconds int // Above this value move-up and move-below are blocked
MaintenanceExpireMinutes uint // Minutes after which a maintenance flag is considered stale and is cleared
MaintenancePurgeDays uint // Days after which maintenance entries are purged from the database
CandidateInstanceExpireMinutes uint // Minutes after which a suggestion to use an instance as a candidate slave (to be preferably promoted on master failover) is expired.
AuditLogFile string // Name of log file for audit operations. Disabled when empty.
AuditToSyslog bool // If true, audit messages are written to syslog
AuditPageSize int
AuditPurgeDays uint // Days after which audit entries are purged from the database
RemoveTextFromHostnameDisplay string // Text to strip off the hostname on cluster/clusters pages
ReadOnly bool
AuthenticationMethod string // Type of autherntication to use, if any. "" for none, "basic" for BasicAuth, "multi" for advanced BasicAuth, "proxy" for forwarded credentials via reverse proxy
HTTPAuthUser string // Username for HTTP Basic authentication (blank disables authentication)
HTTPAuthPassword string // Password for HTTP Basic authentication
AuthUserHeader string // HTTP header indicating auth user, when AuthenticationMethod is "proxy"
PowerAuthUsers []string // On AuthenticationMethod == "proxy", list of users that can make changes. All others are read-only.
ClusterNameToAlias map[string]string // map between regex matching cluster name to a human friendly alias
DetectClusterAliasQuery string // Optional query (executed on topology instance) that returns the alias of a cluster. Query will only be executed on cluster master (though until the topology's master is resovled it may execute on other/all slaves). If provided, must return one row, one column
DetectClusterDomainQuery string // Optional query (executed on topology instance) that returns the VIP/CNAME/Alias/whatever domain name for the master of this cluster. Query will only be executed on cluster master (though until the topology's master is resovled it may execute on other/all slaves). If provided, must return one row, one column
DataCenterPattern string // Regexp pattern with one group, extracting the datacenter name from the hostname
PhysicalEnvironmentPattern string // Regexp pattern with one group, extracting physical environment info from hostname (e.g. combination of datacenter & prod/dev env)
PromotionIgnoreHostnameFilters []string // Orchestrator will not promote slaves with hostname matching pattern (via -c recovery; for example, avoid promoting dev-dedicated machines)
ServeAgentsHttp bool // Spawn another HTTP interface dedicated for orcehstrator-agent
AgentsUseSSL bool // When "true" orchestrator will listen on agents port with SSL as well as connect to agents via SSL
AgentsUseMutualTLS bool // When "true" Use mutual TLS for the server to agent communication
AgentSSLSkipVerify bool // When using SSL for the Agent, should we ignore SSL certification error
AgentSSLPrivateKeyFile string // Name of Agent SSL private key file, applies only when AgentsUseSSL = true
AgentSSLCertFile string // Name of Agent SSL certification file, applies only when AgentsUseSSL = true
AgentSSLCAFile string // Name of the Agent Certificate Authority file, applies only when AgentsUseSSL = true
AgentSSLValidOUs []string // Valid organizational units when using mutual TLS to communicate with the agents
UseSSL bool // Use SSL on the server web port
UseMutualTLS bool // When "true" Use mutual TLS for the server's web and API connections
SSLSkipVerify bool // When using SSL, should we ignore SSL certification error
SSLPrivateKeyFile string // Name of SSL private key file, applies only when UseSSL = true
SSLCertFile string // Name of SSL certification file, applies only when UseSSL = true
SSLCAFile string // Name of the Certificate Authority file, applies only when UseSSL = true
SSLValidOUs []string // Valid organizational units when using mutual TLS
StatusEndpoint string // Override the status endpoint. Defaults to '/api/status'
StatusSimpleHealth bool // If true, calling the status endpoint will use the simplified health check
StatusOUVerify bool // If true, try to verify OUs when Mutual TLS is on. Defaults to false
HttpTimeoutSeconds int // Number of idle seconds before HTTP GET request times out (when accessing orchestrator-agent)
AgentPollMinutes uint // Minutes between agent polling
AgentAutoDiscover bool // If true, instances should automatically discover when an agent is submitted
UnseenAgentForgetHours uint // Number of hours after which an unseen agent is forgotten
StaleSeedFailMinutes uint // Number of minutes after which a stale (no progress) seed is considered failed.
SeedAcceptableBytesDiff int64 // Difference in bytes between seed source & target data size that is still considered as successful copy
PseudoGTIDPattern string // Pattern to look for in binary logs that makes for a unique entry (pseudo GTID). When empty, Pseudo-GTID based refactoring is disabled.
PseudoGTIDMonotonicHint string // subtring in Pseudo-GTID entry which indicates Pseudo-GTID entries are expected to be monotonically increasing
DetectPseudoGTIDQuery string // Optional query which is used to authoritatively decide whether pseudo gtid is enabled on instance
BinlogEventsChunkSize int // Chunk size (X) for SHOW BINLOG|RELAYLOG EVENTS LIMIT ?,X statements. Smaller means less locking and mroe work to be done
BufferBinlogEvents bool // Should we used buffered read on SHOW BINLOG|RELAYLOG EVENTS -- releases the database lock sooner (recommended)
SkipBinlogEventsContaining []string // When scanning/comparing binlogs for Pseudo-GTID, skip entries containing given texts. These are NOT regular expressions (would consume too much CPU while scanning binlogs), just substrings to find.
ReduceReplicationAnalysisCount bool // When true, replication analysis will only report instances where possibility of handled problems is possible in the first place (e.g. will not report most leaf nodes, that are mostly uninteresting). When false, provides an entry for every known instance
FailureDetectionPeriodBlockMinutes int // The time for which an instance's failure discovery is kept "active", so as to avoid concurrent "discoveries" of the instance's failure; this preceeds any recovery process, if any.
RecoveryPollSeconds int // Interval between checks for a recovery scenario and initiation of a recovery process
RecoveryPeriodBlockMinutes int // (supported for backwards compatibility but please use newer `RecoveryPeriodBlockSeconds` instead) The time for which an instance's recovery is kept "active", so as to avoid concurrent recoveries on smae instance as well as flapping
RecoveryPeriodBlockSeconds int // (overrides `RecoveryPeriodBlockMinutes`) The time for which an instance's recovery is kept "active", so as to avoid concurrent recoveries on smae instance as well as flapping
RecoveryIgnoreHostnameFilters []string // Recovery analysis will completely ignore hosts matching given patterns
RecoverMasterClusterFilters []string // Only do master recovery on clusters matching these regexp patterns (of course the ".*" pattern matches everything)
RecoverIntermediateMasterClusterFilters []string // Only do IM recovery on clusters matching these regexp patterns (of course the ".*" pattern matches everything)
OnFailureDetectionProcesses []string // Processes to execute when detecting a failover scenario (before making a decision whether to failover or not). May and should use some of these placeholders: {failureType}, {failureDescription}, {failedHost}, {failureCluster}, {failureClusterAlias}, {failedPort}, {successorHost}, {successorPort}, {countSlaves}, {slaveHosts}, {isDowntimed}, {autoMasterRecovery}, {autoIntermediateMasterRecovery}
PreFailoverProcesses []string // Processes to execute before doing a failover (aborting operation should any once of them exits with non-zero code; order of execution undefined). May and should use some of these placeholders: {failureType}, {failureDescription}, {failedHost}, {failureCluster}, {failureClusterAlias}, {failedPort}, {successorHost}, {successorPort}, {countSlaves}, {slaveHosts}, {isDowntimed}
PostFailoverProcesses []string // Processes to execute after doing a failover (order of execution undefined). May and should use some of these placeholders: {failureType}, {failureDescription}, {failedHost}, {failureCluster}, {failureClusterAlias}, {failedPort}, {successorHost}, {successorPort}, {countSlaves}, {slaveHosts}, {isDowntimed}, {isSuccessful}, {lostSlaves}
PostUnsuccessfulFailoverProcesses []string // Processes to execute after a not-completely-successful failover (order of execution undefined). May and should use some of these placeholders: {failureType}, {failureDescription}, {failedHost}, {failureCluster}, {failureClusterAlias}, {failedPort}, {successorHost}, {successorPort}, {countSlaves}, {slaveHosts}, {isDowntimed}, {isSuccessful}, {lostSlaves}
PostMasterFailoverProcesses []string // Processes to execute after doing a master failover (order of execution undefined). Uses same placeholders as PostFailoverProcesses
PostIntermediateMasterFailoverProcesses []string // Processes to execute after doing a master failover (order of execution undefined). Uses same placeholders as PostFailoverProcesses
CoMasterRecoveryMustPromoteOtherCoMaster bool // When 'false', anything can get promoted (and candidates are prefered over others). When 'true', orchestrator will promote the other co-master or else fail
DetachLostSlavesAfterMasterFailover bool // Should slaves that are not to be lost in master recovery (i.e. were more up-to-date than promoted slave) be forcibly detached
ApplyMySQLPromotionAfterMasterFailover bool // Should orchestrator take upon itself to apply MySQL master promotion: set read_only=0, detach replication, etc.
MasterFailoverLostInstancesDowntimeMinutes uint // Number of minutes to downtime any server that was lost after a master failover (including failed master & lost slaves). 0 to disable
PostponeSlaveRecoveryOnLagMinutes uint // On crash recovery, slaves that are lagging more than given minutes are only resurrected late in the recovery process, after master/IM has been elected and processes executed. Value of 0 disables this feature
OSCIgnoreHostnameFilters []string // OSC slaves recommendation will ignore slave hostnames matching given patterns
GraphiteAddr string // Optional; address of graphite port. If supplied, metrics will be written here
GraphitePath string // Prefix for graphite path. May include {hostname} magic placeholder
GraphiteConvertHostnameDotsToUnderscores bool // If true, then hostname's dots are converted to underscores before being used in graphite path
}
Configuration makes for orchestrator configuration input, which can be provided by user via JSON formatted file. Some of the parameteres have reasonable default values, and some (like database credentials) are strictly expected from user.
var Config *Configuration = NewConfiguration()
func ForceRead ¶
func ForceRead(file_name string) *Configuration
ForceRead reads configuration from given file name or bails out if it fails
func NewConfiguration ¶
func NewConfiguration() *Configuration
func Read ¶
func Read(file_names ...string) *Configuration
Read reads configuration from zero, either, some or all given files, in order of input. A file can override configuration provided in previous file.
func Reload ¶
func Reload() *Configuration
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