Documentation
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Index ¶
Constants ¶
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const ( HealthPollSeconds = 1 RaftHealthPollSeconds = 10 RecoveryPollSeconds = 1 ActiveNodeExpireSeconds = 5 BinlogFileHistoryDays = 1 MaintenanceOwner = "ham4db" AuditPageSize = 20 MaintenancePurgeDays = 7 TopologyMaxPoolConnections = 3 MaintenanceExpireMinutes = 10 AgentHttpTimeoutSeconds = 60 PseudoGTIDCoordinatesHistoryHeuristicMinutes = 2 DebugMetricsIntervalSeconds = 10 PseudoGTIDSchema = "_pseudo_gtid_" PseudoGTIDIntervalSeconds = 5 PseudoGTIDExpireMinutes = 60 StaleInstanceCoordinatesExpireSeconds = 60 CheckAutoPseudoGTIDGrantsIntervalSeconds = 60 SelectTrueQuery = "select 1" )
Variables ¶
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var Config = newConfiguration()
Config is *the* configuration instance, used globally to get configuration data
Functions ¶
func MarkConfigurationLoaded ¶
func MarkConfigurationLoaded()
MarkConfigurationLoaded is called once configuration has first been loaded. Listeners on ConfigurationLoaded will get a notification
func ValidSecondsFromSeenToLastAttemptedCheck ¶
func ValidSecondsFromSeenToLastAttemptedCheck() uint
ValidSecondsFromSeenToLastAttemptedCheck returns the maximum allowed elapsed time between last_attempted_check_timestamp to last_checked_timestamp before we consider the instance as invalid.
func WaitForConfigurationToBeLoaded ¶
func WaitForConfigurationToBeLoaded()
WaitForConfigurationToBeLoaded does just that. It will return after the configuration file has been read off disk.
Types ¶
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?
AutoDiscover bool // flag,for investigate upstream and downstream instance
ListenAddress string // Where ham4db HTTP should listen for TCP
ListenSocket string // Where ham4db HTTP should listen for unix socket (default: empty; when given, TCP is disabled)
HTTPAdvertise string // optional, for raft setups, what is the HTTP address this node will advertise to its peers (potentially use where behind NAT or when rerouting ports; example: "http://11.22.33.44:3030")
AgentsServerPort string // port ham4db agents talk back to
MysqlTopologyUser string
MysqlTopologyPassword string
MySQLTopologyCredentialsConfigFile string // my.cnf style configuration file from where to pick credentials. Expecting `user`, `password` under `[client]` section
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
MySQLTopologyUseMixedTLS bool // Mixed TLS and non-TLS authentication with the Topology MySQL instances
TLSCacheTTLFactor uint // Factor of InstancePollSeconds that we set as TLS info cache expiry
BackendDB string // EXPERIMENTAL: type of backend db; either "mysql" or "sqlite3"
SQLite3DataFile string // when BackendDB == "sqlite3", full path to sqlite3 datafile
SkipDatabaseUpdate bool // When true, do not check backend database schema nor attempt to update it. Useful when you may be running multiple versions of ham4db, and you only wish certain boxes to dictate the db structure (or else any time a different ham4db version runs it will rebuild database schema)
PanicIfDifferentDatabaseDeploy bool // When true, and this process finds the ham4db backend DB was provisioned by a different version, panic
RaftEnabled bool // When true, setup ham4db in a raft consensus layout. When false (default) all Raft* variables are ignored
RaftBind string
RaftAdvertise string
RaftDataDir string
DefaultRaftPort int // if a RaftNodes entry does not specify port, use this one
RaftNodes []string // Raft nodes to make initial connection with
ExpectFailureAnalysisConcensus bool
MaxPoolConnections int // The maximum size of the connection pool to the backend.
BackendDatabase string
BackendDBHost string
BackendDBPort uint
BackendDBUser string
BackendDBPassword string
MySQLCredentialsConfigFile string // my.cnf style configuration file from where to pick credentials. Expecting `user`, `password` under `[client]` section
MySQLSSLPrivateKeyFile string // Private key file used to authenticate with the mysql instance with TLS
MySQLSSLCertFile string // Certificate PEM file used to authenticate with the mysql instance with TLS
MySQLSSLCAFile string // Certificate Authority PEM file used to authenticate with the mysql instance with TLS
MySQLSSLSkipVerify bool // If true, do not strictly validate mutual TLS certs for the mysql instances
MySQLUseMutualTLS bool // Turn on TLS authentication with the MySQL instance
MySQLReadTimeoutSeconds int // Number of seconds before backend mysql read operation is aborted (driver-side)
MySQLRejectReadOnly bool // Reject read only connections https://github.com/go-sql-driver/mysql#rejectreadonly
ConnectTimeoutSeconds int // Number of seconds before connection is aborted (driver-side)
MySQLDiscoveryReadTimeoutSeconds int // Number of seconds before topology mysql read operation is aborted (driver-side). Used for discovery queries.
MySQLTopologyReadTimeoutSeconds int // Number of seconds before topology mysql read operation is aborted (driver-side). Used for all but discovery queries.
ConnectionLifetimeSeconds int // Number of seconds the mysql driver will keep database connection alive before recycling it
EnableAdaptor []string // plugin which enabled
DefaultInstancePort int // In case port was not specified on command line
SlaveLagQuery string // Synonym to ReplicationLagQuery
ReplicationLagQuery string // custom query to check on replica lg (e.g. heartbeat table). Must return a single row with a single numeric column, which is the lag.
ReplicationCredentialsQuery string // custom query to get replication credentials. Must return a single row, with two text columns: 1st is username, 2nd is password. This is optional, and can be used by ham4db to configure replication after master takeover or setup of co-masters. You need to ensure the ham4db user has the privileges to run this query
DiscoverByShowSlaveHosts bool // Attempt SHOW SLAVE HOSTS before PROCESSLIST
UseSuperReadOnly bool // Should ham4db super_read_only any time it sets read_only
InstancePollSeconds uint // Number of seconds between instance reads
InstanceWriteBufferSize int // Instance write buffer size (max number of instances to flush in one INSERT ODKU)
BufferInstanceWrites bool // Set to 'true' for write-optimization on backend table (compromise: writes can be stale and overwrite non stale data)
InstanceFlushIntervalMilliseconds int // Max interval between instance write buffer flushes
SkipMaxScaleCheck bool // If you don't ever have MaxScale BinlogServer in your topology (and most people don't), set this to 'true' to save some pointless 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)
DiscoveryMaxConcurrency uint // Number of goroutines doing hosts discovery
DiscoveryQueueCapacity uint // Buffer size of the discovery queue. Should be greater than the number of DB instances being discovered
DiscoveryQueueMaxStatisticsSize int // The maximum number of individual secondly statistics taken of the discovery queue
DiscoveryCollectionRetentionSeconds uint // Number of seconds to retain the discovery collection information
DiscoverySeeds []string // Hard coded array of type:hostname:port, ensuring ham4db discovers these hosts upon startup, assuming not already known to ham4db
InstanceBulkOperationsWaitTimeoutSeconds uint // Time to wait on a single instance when doing bulk (many instances) operation
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
ReasonableMaintenanceReplicationLagSeconds int // Above this value move-up and move-below are blocked
CandidateInstanceExpireMinutes uint // Minutes after which a suggestion to use an instance as a candidate replica (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
AuditToBackendDB bool // If true, audit messages are written to the backend DB's `audit` table (default: true)
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, "token" for token based access
OAuthClientId string
OAuthClientSecret string
OAuthScopes []string
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.
PowerAuthGroups []string // list of unix groups the authenticated user must be a member of to make changes.
AccessTokenUseExpirySeconds float32 // Time by which an issued token must be used
AccessTokenExpiryMinutes float32 // Time after which HTTP access token expires
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 replicas). 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 replicas). If provided, must return one row, one column
DetectInstanceAliasQuery string // Optional query (executed on topology instance) that returns the alias of an instance. If provided, must return one row, one column
DetectPromotionRuleQuery string // Optional query (executed on topology instance) that returns the promotion rule of an instance. If provided, must return one row, one column.
DataCenterPattern string // Regexp pattern with one group, extracting the datacenter name from the hostname
RegionPattern string // Regexp pattern with one group, extracting the region name from the hostname
EnvironmentPattern string // Regexp pattern with one group, extracting environment info from hostname (e.g. combination of datacenter & prod/dev env)
DetectDataCenterQuery string // Optional query (executed on topology instance) that returns the data center of an instance. If provided, must return one row, one column. Overrides DataCenterPattern and useful for installments where DC cannot be inferred by hostname
DetectRegionQuery string // Optional query (executed on topology instance) that returns the region of an instance. If provided, must return one row, one column. Overrides RegionPattern and useful for installments where Region cannot be inferred by hostname
DetectEnvironmentQuery string // Optional query (executed on topology instance) that returns the physical environment of an instance. If provided, must return one row, one column. Overrides EnvironmentPattern and useful for installments where env cannot be inferred by hostname
DetectSemiSyncEnforcedQuery string // Optional query (executed on topology instance) to determine whether semi-sync is fully enforced for master writes (async fallback is not allowed under any circumstance). If provided, must return one row, one column, value 0 or 1.
SupportFuzzyPoolHostnames bool // Should "submit-pool-instances" command be able to pass list of fuzzy instances (fuzzy means non-fqdn, but unique enough to recognize). Defaults 'true', implies more queries on backend db
InstancePoolExpiryMinutes uint // Time after which entries in database_instance_pool are expired (resubmit via `submit-pool-instances`)
PromotionIgnoreHostnameFilters []string // Will not promote replicas with hostname matching pattern (via -c recovery; for example, avoid promoting dev-dedicated machines)
ServeAgentsHttp bool // Spawn another HTTP interface dedicated for ham4db-agent
AgentsUseSSL bool // When "true" ham4db 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'
StatusOUVerify bool // If true, try to verify OUs when Mutual TLS is on. Defaults to false
AgentPollMinutes uint // Minutes between agent polling
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
SeedWaitSecondsBeforeSend int64 // Number of seconds for waiting before start send data command on agent
AutoPseudoGTID bool // Should ham4db automatically inject Pseudo-GTID entries to the masters
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.
PseudoGTIDPatternIsFixedSubstring bool // If true, then PseudoGTIDPattern is not treated as regular expression but as fixed substring, and can boost search time
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
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.
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 same 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 same 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)
ProcessesShellCommand string // Shell that executes command scripts
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}, {instanceType}, {isMaster}, {isCoMaster}, {failureDescription}, {command}, {failedHost}, {failureCluster}, {failureClusterAlias}, {failureClusterDomain}, {failedPort}, {successorHost}, {successorPort}, {successorAlias}, {countReplicas}, {replicaHosts}, {isDowntimed}, {autoMasterRecovery}, {autoIntermediateMasterRecovery}
PreGracefulTakeoverProcesses []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}, {instanceType}, {isMaster}, {isCoMaster}, {failureDescription}, {command}, {failedHost}, {failureCluster}, {failureClusterAlias}, {failureClusterDomain}, {failedPort}, {successorHost}, {successorPort}, {countReplicas}, {replicaHosts}, {isDowntimed}
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}, {instanceType}, {isMaster}, {isCoMaster}, {failureDescription}, {command}, {failedHost}, {failureCluster}, {failureClusterAlias}, {failureClusterDomain}, {failedPort}, {countReplicas}, {replicaHosts}, {isDowntimed}
PostFailoverProcesses []string // Processes to execute after doing a failover (order of execution undefined). May and should use some of these placeholders: {failureType}, {instanceType}, {isMaster}, {isCoMaster}, {failureDescription}, {command}, {failedHost}, {failureCluster}, {failureClusterAlias}, {failureClusterDomain}, {failedPort}, {successorHost}, {successorPort}, {successorAlias}, {countReplicas}, {replicaHosts}, {isDowntimed}, {isSuccessful}, {lostReplicas}, {countLostReplicas}
PostUnsuccessfulFailoverProcesses []string // Processes to execute after a not-completely-successful failover (order of execution undefined). May and should use some of these placeholders: {failureType}, {instanceType}, {isMaster}, {isCoMaster}, {failureDescription}, {command}, {failedHost}, {failureCluster}, {failureClusterAlias}, {failureClusterDomain}, {failedPort}, {successorHost}, {successorPort}, {successorAlias}, {countReplicas}, {replicaHosts}, {isDowntimed}, {isSuccessful}, {lostReplicas}, {countLostReplicas}
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
PostGracefulTakeoverProcesses []string // Processes to execute after runnign a graceful master takeover. Uses same placeholders as PostFailoverProcesses
PostTakeMasterProcesses []string // Processes to execute after a successful Take-Master event has taken place
CoMasterRecoveryMustPromoteOtherCoMaster bool // When 'false', anything can get promoted (and candidates are prefered over others). When 'true', ham4db will promote the other co-master or else fail
DetachLostSlavesAfterMasterFailover bool // synonym to DetachLostReplicasAfterMasterFailover
DetachLostReplicasAfterMasterFailover bool // Should replicas that are not to be lost in master recovery (i.e. were more up-to-date than promoted replica) be forcibly detached
ApplyMySQLPromotionAfterMasterFailover bool // Should ham4db take upon itself to apply MySQL master promotion: set read_only=0, detach replication, etc.
PreventCrossDataCenterMasterFailover bool // When true (default: false), cross-DC master failover are not allowed, ham4db will do all it can to only fail over within same DC, or else not fail over at all.
PreventCrossRegionMasterFailover bool // When true (default: false), cross-region master failover are not allowed, ham4db will do all it can to only fail over within same region, or else not fail over at all.
MasterFailoverLostInstancesDowntimeMinutes uint // Number of minutes to downtime any server that was lost after a master failover (including failed master & lost replicas). 0 to disable
MasterFailoverDetachSlaveMasterHost bool // synonym to MasterFailoverDetachReplicaMasterHost
MasterFailoverDetachReplicaMasterHost bool // Should ham4db issue a detach-replica-master-host on newly promoted master (this makes sure the new master will not attempt to replicate old master if that comes back to life). Defaults 'false'. Meaningless if ApplyMySQLPromotionAfterMasterFailover is 'true'.
FailMasterPromotionOnLagMinutes uint // when > 0, fail a master promotion if the candidate replica is lagging >= configured number of minutes.
FailMasterPromotionIfSQLThreadNotUpToDate bool // when true, and a master failover takes place, if candidate master has not consumed all relay logs, promotion is aborted with error
DelayMasterPromotionIfSQLThreadNotUpToDate bool // when true, and a master failover takes place, if candidate master has not consumed all relay logs, delay promotion until the sql thread has caught up
PostponeSlaveRecoveryOnLagMinutes uint // Synonym to PostponeReplicaRecoveryOnLagMinutes
PostponeReplicaRecoveryOnLagMinutes uint // On crash recovery, replicas 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 replicas recommendation will ignore replica hostnames matching given patterns
MonitorType []string // Monitor type
GraphiteAddr string // Optional; address of graphite port. If supplied, metric 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
GraphitePollSeconds int // Graphite writes interval. 0 disables.
URLPrefix string // URL prefix to run ham4db on non-root web path, e.g. /ham4db to put it behind nginx.
DiscoveryIgnoreReplicaHostnameFilters []string // Regexp filters to apply to prevent auto-discovering new replicas. Usage: unreachable servers due to firewalls, applications which trigger binlog dumps
DiscoveryIgnoreMasterHostnameFilters []string // Regexp filters to apply to prevent auto-discovering a master. Usage: pointing your master temporarily to replicate seom data from external host
DiscoveryIgnoreHostnameFilters []string // Regexp filters to apply to prevent discovering instances of any kind
ConsulAddress string // Address where Consul HTTP api is found. Example: 127.0.0.1:8500
ConsulScheme string // Scheme (http or https) for Consul
ConsulAclToken string // ACL token used to write to Consul KV
ConsulCrossDataCenterDistribution bool // should ham4db automatically auto-deduce all consul DCs and write KVs in all DCs
ConsulKVStoreProvider string // Consul KV store provider (consul or consul-txn), default: "consul"
ZkAddress string // UNSUPPERTED YET. Address where (single or multiple) ZooKeeper servers are found, in `srv1[:port1][,srv2[:port2]...]` format. Default port is 2181. Example: srv-a,srv-b:12181,srv-c
KVClusterMasterPrefix string // Prefix to use for clusters' masters entries in KV stores (internal, consul, ZK), default: "mysql/master"
WebMessage string // If provided, will be shown on all web pages below the title bar
MaxConcurrentReplicaOperations int // Maximum number of concurrent operations on replicas
}
Configuration makes for ham4db 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.
func ForceRead ¶
func ForceRead(fileName string) *Configuration
ForceRead reads configuration from given file name or bails out if it fails
func Read ¶
func Read(configFileList ...string) *Configuration
Read read 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(extraFileList ...string) *Configuration
Reload re-read configuration from last used files
func (*Configuration) IsMySQL ¶
func (this *Configuration) IsMySQL() bool
func (*Configuration) IsSQLite ¶
func (this *Configuration) IsSQLite() bool
func (*Configuration) ToJSONString ¶
func (this *Configuration) ToJSONString() string
ToJSONString will marshal this configuration as JSON
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