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prometheus.exporter.mysql

Open source

prometheus.exporter.mysql

The prometheus.exporter.mysql component embeds mysqld_exporter for collecting stats from a MySQL server.

Usage

prometheus.exporter.mysql "LABEL" {
    data_source_name = DATA_SOURCE_NAME
}

Arguments

The following arguments can be used to configure the exporter’s behavior. All arguments are optional. Omitted fields take their default values.

Name	Type	Description	Default	Required
`data_source_name`	`secret`	Data Source Name for the MySQL server to connect to.		yes
`enable_collectors`	`list(string)`	A list of collectors to enable on top of the default set.		no
`disable_collectors`	`list(string)`	A list of collectors to disable from the default set.		no
`set_collectors`	`list(string)`	A list of collectors to run. Fully overrides the default set.		no
`lock_wait_timeout`	`int`	Timeout, in seconds, to acquire a metadata lock.	`2`	no
`log_slow_filter`	`bool`	Used to avoid queries from scrapes being logged in the slow query log.	`false`	no

Set a lock_wait_timeout on the connection to avoid potentially long wait times for metadata locks. View more detailed documentation on lock_wait_timeout in the MySQL documentation.

NOTE: log_slow_filter is not supported by Oracle MySQL.

Blocks

The following blocks are supported inside the definition of prometheus.exporter.mysql to configure collector-specific options:

Hierarchy	Name	Description	Required
info_schema.processlist	info_schema.processlist	Configures the `info_schema.processlist` collector.	no
info_schema.tables	info_schema.tables	Configures the `info_schema.tables` collector.	no
perf_schema.eventsstatements	perf_schema.eventsstatements	Configures the `perf_schema.eventsstatements` collector.	no
perf_schema.file_instances	perf_schema.file_instances	Configures the `perf_schema.file_instances` collector.	no
heartbeat	heartbeat	Configures the `heartbeat` collector.	no
mysql.user	mysql.user	Configures the `mysql.user` collector.	no

info_schema.processlist block

Name	Type	Description	Default	Required
`min_time`	`int`	Minimum time a thread must be in each state to be counted.	`0`	no
`processes_by_user`	`bool`	Enable collecting the number of processes by user.	`true`	no
`processes_by_host`	`bool`	Enable collecting the number of processes by host.	`true`	no

info_schema.tables block

Name	Type	Description	Default	Required
`info_schema_tables_databases`	`string`	Regular expression to match databases to collect table stats for.	`"*"`	no

perf_schema.eventsstatements block

Name	Type	Description	Default	Required
`limit`	`int`	Limit the number of events statements digests, in descending order by `last_seen`.	`250`	no
`time_limit`	`int`	Limit how old, in seconds, the `last_seen` events statements can be.	`86400`	no
`text_limit`	`int`	Maximum length of the normalized statement text.	`120`	no

perf_schema.file_instances block

Name	Type	Description	Default	Required
`filter`	`string`	Regular expression to select rows in `performance_schema.file_summary_by_instance`.	`".*"`	no
`remove_prefix`	`string`	Prefix to trim away from `file_name`.	`"/var/lib/mysql"`	no

View more detailed documentation on the tables used in perf_schema_file_instances_filter and perf_schema_file_instances_remove_prefix in the MySQL documentation.

heartbeat block

Name	Type	Description	Default	Required
`database`	`string`	Database to collect heartbeat data from.	`"heartbeat"`	no
`table`	`string`	Table to collect heartbeat data from.	`"heartbeat"`	no
`utc`	`bool`	Use UTC for timestamps of the current server (`pt-heartbeat` is called with `--utc`).	`false`	no

mysql.user block

Name	Type	Description	Default	Required
`privileges`	`bool`	Enable collecting user privileges from `mysql.user`.	`false`	no

Supported Collectors

The full list of supported collectors is:

Name	Description	Enabled by default
auto_increment.columns	Collect `auto_increment` columns and max values from `information_schema`.	no
binlog_size	Collect the current size of all registered `binlog` files.	no
engine_innodb_status	Collect metrics from `SHOW ENGINE INNODB STATUS`.	no
engine_tokudb_status	Collect metrics from `SHOW ENGINE TOKUDB STATUS`.	no
global_status	Collect metrics from `SHOW GLOBAL STATUS`.	yes
global_variables	Collect metrics from `SHOW GLOBAL VARIABLES`.	yes
heartbeat	Collect metrics from heartbeat database and tables.	no
info_schema.clientstats	If running with userstat=1, enable to collect client statistics.	no
info_schema.innodb_cmpmem	Collect metrics from `information_schema.innodb_cmpmem`.	yes
info_schema.innodb_metrics	Collect metrics from `information_schema.innodb_metrics`.	yes
info_schema.innodb_tablespaces	Collect metrics from `information_schema.innodb_sys_tablespaces`.	no
info_schema.processlist	Collect current thread state counts from the `information_schema.processlist`.	no
info_schema.query_response_time	Collect query response time distribution if `query_response_time_stats` is ON.	yes
info_schema.replica_host	Collect metrics from `information_schema.replica_host_status`.	no
info_schema.schemastats	If running with userstat=1, enable to collect schema statistics.	no
info_schema.tables	Collect metrics from `information_schema.tables`.	no
info_schema.tablestats	If running with userstat=1, enable to collect table statistics.	no
info_schema.userstats	If running with userstat=1, enable to collect user statistics.	no
mysql.user	Collect data from `mysql.user`.	no
perf_schema.eventsstatements	Collect metrics from `performance_schema.events_statements_summary_by_digest`.	no
perf_schema.eventsstatementssum	Collect metrics of grand sums from `performance_schema.events_statements_summary_by_digest`.	no
perf_schema.eventswaits	Collect metrics from `performance_schema.events_waits_summary_global_by_event_name`.	no
perf_schema.file_events	Collect metrics from `performance_schema.file_summary_by_event_name`.	no
perf_schema.file_instances	Collect metrics from `performance_schema.file_summary_by_instance`.	no
perf_schema.indexiowaits	Collect metrics from `performance_schema.table_io_waits_summary_by_index_usage`.	no
perf_schema.replication_applier_status_by_worker	Collect metrics from `performance_schema.replication_applier_status_by_worker`.	no
perf_schema.replication_group_member_stats	Collect metrics from `performance_schema.replication_group_member_stats`.	no
perf_schema.replication_group_members	Collect metrics from `performance_schema.replication_group_members`.	no
perf_schema.tableiowaits	Collect metrics from `performance_schema.table_io_waits_summary_by_table`.	no
perf_schema.tablelocks	Collect metrics from `performance_schema.table_lock_waits_summary_by_table`.	no
slave_hosts	Scrape information from `SHOW SLAVE HOSTS`.	no
slave_status	Scrape information from `SHOW SLAVE STATUS`.	yes

Exported fields

The following fields are exported and can be referenced by other components.

Name	Type	Description
`targets`	`list(map(string))`	The targets that can be used to collect exporter metrics.

For example, the targets can either be passed to a discovery.relabel component to rewrite the targets’ label sets or to a prometheus.scrape component that collects the exposed metrics.

The exported targets use the configured in-memory traffic address specified by the run command.

Component health

prometheus.exporter.mysql is only reported as unhealthy if given an invalid configuration. In those cases, exported fields retain their last healthy values.

Debug information

prometheus.exporter.mysql does not expose any component-specific debug information.

Debug metrics

prometheus.exporter.mysql does not expose any component-specific debug metrics.

Example

This example uses a prometheus.scrape component to collect metrics from prometheus.exporter.mysql:

prometheus.exporter.mysql "example" {
  data_source_name  = "root@(server-a:3306)/"
  enable_collectors = ["heartbeat", "mysql.user"]
}

// Configure a prometheus.scrape component to collect mysql metrics.
prometheus.scrape "demo" {
  targets    = prometheus.exporter.mysql.example.targets
  forward_to = [prometheus.remote_write.demo.receiver]
}

prometheus.remote_write "demo" {
  endpoint {
    url = PROMETHEUS_REMOTE_WRITE_URL

    basic_auth {
      username = USERNAME
      password = PASSWORD
    }
  }
}

Replace the following:

PROMETHEUS_REMOTE_WRITE_URL: The URL of the Prometheus remote_write-compatible server to send metrics to.
USERNAME: The username to use for authentication to the remote_write API.
PASSWORD: The password to use for authentication to the remote_write API.

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