Prometheus exporter for PostgreSQL Server & Pgbouncer metrics.
PG Exporter aims to bring the ultimate observability for Pigsty x PostgreSQL, which is a Free RDS PG Alternative and battery-included open-source PostgreSQL distribution: Demo & Gallery
PG Exporter is fully customizable, flexible, and extensible. It defines almost all metrics with declarative YAML configuration files. It's easy to add new metrics or modify existing ones. Much more that the prometheus community one.
The latest stable version is 0.6.1, which support PostgreSQL 10 ~ 16+ and Pgbouncer 1.8 ~ 1.21+.
- Support Pigsty, the battery-include PostgreSQL distribution with ultimate observability.
- Support both Postgres & Pgbouncer (Pgbouncer is detected when target dbname is
pgbouncer) - Flexible: Almost all metrics are defined in customizable conf files with SQL collector.
- Schedule: Fine-grained execution control: Timeout, Cache, Skip, Fatality, etc...
- Dynamic Planning: Define multiple branches for a collector. Install specific branch when server & exporter meet certain conditions.
- Rich self-monitoring metrics about
pg_exporteritself. - Auto-discovery multiple databases, and run database level collectors
- Tested and verified in a real-world production environment for several years (10K+ cores)
To run this exporter, you will need two things:
- Where to scrape: A Postgres or pgbouncer URL given via
PG_EXPORTER_URLor--url. - What to scrape: A path to config file or directory, by default
./pg_exporter.ymlor/etc/pg_exporter.yml
export PG_EXPORTER_URL='postgres://postgres:password@localhost:5432/postgres'
export PG_EXPORTER_CONFIG='/path/to/conf/file/or/dir'
pg_exporterpg_exporter only built-in with 3 metrics: pg_up,pg_version , and pg_in_recovery. All other metrics are defined in configuration files.
You could use the pre-defined configuration file: pg_exporter.yml or use separated metric query in conf dir.
Parameters could be given via command-line args or environment variables.
--web.listen-addressis the web endpoint listen address,:9630by default, this parameter can not be changed via environment variable.--web.telemetry-path orPG_EXPORTER_TELEMETRY_PATH` is the URL path under which to expose metrics.--urlorPG_EXPORTER_URLdefines where to scrape, it should be a valid DSN or URL. (note thatsslmode=disablemust be specifed explicitly for database that does not using SSL)--configorPG_EXPORTER_CONFIGdefines how to scrape. It could be a single YAML file or a directory containing a series of separated YAML configs, which config will be loaded in alphabetic order.--labelorPG_EXPORTER_LABELdefines constant labels that are added to all metrics. It should be a comma-separated list oflabel=valuepairs.--tagorPG_EXPORTER_TAGwill mark this exporter with given tags. Tags are a comma-separated-value list of strings. which could be used for query filtering and execution control.--disable-cacheorPG_EXPORTER_DISABLE_CACHEwill disable metric cache.--auto-discoveryorPG_EXPORTER_AUTO_DISCOVERYwill automatically spawn peripheral servers for other databases in the target PostgreSQL server. except for those listed in--exclude-database. (Not implemented yet)--exclude-databaseorPG_EXPORTER_EXCLUDE_DATABASEis a comma-separated list of the database name. Which are not scrapped when--auto-discoveryis enabled--namespaceorPG_EXPORTER_NAMESPACEdefined internal metrics prefix, by defaultpg|pgbouncer.--fail-fastorPG_EXPORTER_FAIL_FASTis a flag. During start-up,pg_exporterwill wait if the target is down. with--fail-fast=true,pg_exporterwill fail instead of waiting on the start-up procedure if the target is down--connect-timeoutorPG_EXPORTER_CONNECT_TIMEOUTis the timeout for connecting to the target.--dry-runwill print configuration files--explainwill actually connect to the target server and plan queries for it. Then explain which queries are installed.--log.levelwill set logging level: one ofdebug,info,warn,error.
usage: pg_exporter [<flags>]
Flags:
-h, --[no-]help Show context-sensitive help (also try --help-long and --help-man).
-u, --url=URL postgres target url
-c, --config=CONFIG path to config dir or file
--web.listen-address=:9630 ...
Addresses on which to expose metrics and web interface. Repeatable for multiple addresses.
--web.config.file="" [EXPERIMENTAL] Path to configuration file that can enable TLS or authentication. See: https://github.com/prometheus/exporter-toolkit/blob/master/docs/web-configuration.md
-l, --label="" constant lables:comma separated list of label=value pair ($PG_EXPORTER_LABEL)
-t, --tag="" tags,comma separated list of server tag ($PG_EXPORTER_TAG)
-C, --[no-]disable-cache force not using cache ($PG_EXPORTER_DISABLE_CACHE)
-m, --[no-]disable-intro disable collector level introspection metrics ($PG_EXPORTER_DISABLE_INTRO)
-a, --[no-]auto-discovery automatically scrape all database for given server ($PG_EXPORTER_AUTO_DISCOVERY)
-x, --exclude-database="template0,template1,postgres"
excluded databases when enabling auto-discovery ($PG_EXPORTER_EXCLUDE_DATABASE)
-i, --include-database="" included databases when enabling auto-discovery ($PG_EXPORTER_INCLUDE_DATABASE)
-n, --namespace="" prefix of built-in metrics, (pg|pgbouncer) by default ($PG_EXPORTER_NAMESPACE)
-f, --[no-]fail-fast fail fast instead of waiting during start-up ($PG_EXPORTER_FAIL_FAST)
-T, --connect-timeout=100 connect timeout in ms, 100 by default ($PG_EXPORTER_CONNECT_TIMEOUT)
-P, --web.telemetry-path="/metrics"
URL path under which to expose metrics. ($PG_EXPORTER_TELEMETRY_PATH)
-D, --[no-]dry-run dry run and print raw configs
-E, --[no-]explain explain server planned queries
--log.level="info" log level: debug|info|warn|error]
--[no-]version Show application version.Here are pg_exporter REST APIs
# Fetch metrics (metrics path depends on parameters)
curl localhost:9630/metrics
# Reload configuration
curl localhost:9630/reload
# Explain configuration
curl localhost:9630/explain
# Print Statistics
curl localhost:9630/stat
# Aliveness health check (200 up, 503 down)
curl localhost:9630/up
curl localhost:9630/health
curl localhost:9630/liveness
curl localhost:9630/readiness
# traffic route health check
### 200 if not in recovery, 404 if in recovery, 503 if server is down
curl localhost:9630/primary
curl localhost:9630/leader
curl localhost:9630/master
curl localhost:9630/read-write
curl localhost:9630/rw
### 200 if in recovery, 404 if not in recovery, 503 if server is down
curl localhost:9630/replica
curl localhost:9630/standby
curl localhost:9630/slave
curl localhost:9630/read-only
curl localhost:9630/ro
### 200 if server is ready for read traffic (including primary), 503 if server is down
curl localhost:9630/readBuild on your local machine:
go build
To build a static stand-alone binary for docker scratch
CGO_ENABLED=0 GOOS=linux go build -a -ldflags '-extldflags "-static"' -o pg_exporterTo build a docker image, use:
make docker
Or download the latest prebuilt binaries from release pages.
Redhat rpm and Debian/Ubuntu deb packages is made with nfpm.
/usr/bin/pg_exporter: the binary file。/etc/default/pg_exporter: the envs & options/etc/pg_exporter.yml: the config file
Configs lie in the core of pg_exporter. Actually, this project contains more lines of YAML than go.
- A monolith battery-included config file:
pg_exporter.yml - Separated metrics definition in
config/collector - Example of how to write a config file:
doc.yml
Current pg_exporter is shipped with the following metrics collector definition files
Supported version: PostgreSQL 10, 11, 12, 13, 14, 15, 16+
But you can still get PostgreSQL 9.4, 9.5, 9.6 support by switching to the older version collector definition
pgpg_metapg_settingpg_replpg_sync_standbypg_downstrempg_slotpg_recvpg_subpg_originpg_iopg_sizepg_archiverpg_bgwriterpg_sslpg_checkpointpg_recoverypg_slrupg_shmempg_walpg_activitypg_waitpg_backendpg_xactpg_lockpg_querypg_vacuumingpg_indexingpg_clusteringpg_backuppg_dbpg_db_confpg_pubrelpg_subrelpg_relkindpg_tablepg_indexpg_funcpg_seqpg_defpartpg_table_sizepg_table_bloatpg_index_bloatpgbouncer_listpgbouncer_databasepgbouncer_statpgbouncer_pool
pg_exporter will generate approximately 200~300 metrics for a completely new database cluster. For a real-world database with 10 ~ 100 tables, it may generate several 1k ~ 10k metrics. You may need to modify or disable some database-level metrics on a database with several thousand or more tables in order to complete the scrape in time.
Config files are using YAML format, there are lots of examples in the conf dir. and here is a sample config.
#################################################################
#┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓#
#┃ PostgreSQL/Pgbouncer Metric Collector Definition ┃#
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┫#
#┃ Author: Vonng ([email protected]) ┃#
#┃ Desc : pg_exporter metrics collector definition ┃#
#┃ Ver : PostgreSQL 10~14 pgbouncer 1.9+ ┃#
#┃ Ctime : 2019-12-09 ┃#
#┃ Mtime : 2022-04-27 ┃#
#┃ Copyright (C) 2019-2022 Ruohang Feng ┃#
#┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛#
#################################################################
#┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
#┃ 1. Configuration File
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ The configuration file for pg_exporter is a YAML file.
#┃ Default configuration are retrieved via following precedence:
#┃ 1. command line args: --config=<config path>
#┃ 2. environment variables: PG_EXPORTER_CONFIG=<config path>
#┃ 3. pg_exporter.yml (Current directory)
#┃ 4. /etc/pg_exporter.yml (etc config file)
#┃ 5. /etc/pg_exporter (etc config dir)
#┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
#┃ 2. Config Format
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ pg_exporter config could be a single YAML file, or a directory containing a series of separated YAML files.
#┃ each YAML config file is consist of one or more metrics Collector definition. Which are top-level objects
#┃ If a directory is provided, all YAML in that directory will be merged in alphabetic order.
#┃ Collector definition examples are shown below.
#┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
#┃ 3. Collector Example
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ # Here is an example of a metrics collector definition
#┃ pg_primary_only: <---- Collector branch name. Must be UNIQUE among the entire configuration
#┃ name: pg <---- Collector namespace, used as METRIC PREFIX, set to branch name by default, can be override
#┃ the Same namespace may contain multiple collector branches. It's the user's responsibility
#┃ to make sure that AT MOST ONE collector is picked for each namespace.
#┃
#┃ desc: PostgreSQL basic information (on primary) <---- Collector description
#┃ query: | <---- SQL string
#┃
#┃ SELECT extract(EPOCH FROM CURRENT_TIMESTAMP) AS timestamp,
#┃ pg_current_wal_lsn() - '0/0' AS lsn,
#┃ pg_current_wal_insert_lsn() - '0/0' AS insert_lsn,
#┃ pg_current_wal_lsn() - '0/0' AS write_lsn,
#┃ pg_current_wal_flush_lsn() - '0/0' AS flush_lsn,
#┃ extract(EPOCH FROM now() - pg_postmaster_start_time()) AS uptime,
#┃ extract(EPOCH FROM now() - pg_conf_load_time()) AS conf_reload_time,
#┃ pg_is_in_backup() AS is_in_backup,
#┃ extract(EPOCH FROM now() - pg_backup_start_time()) AS backup_time;
#┃
#┃ <---- [OPTIONAL] metadata fields, control collector behavior
#┃ ttl: 10 <---- Cache TTL: in seconds, how long will pg_exporter cache this collector's query result.
#┃ timeout: 0.1 <---- Query Timeout: in seconds, query that exceed this limit will be canceled.
#┃ min_version: 100000 <---- minimal supported version, boundary IS included. In server version number format,
#┃ max_version: 130000 <---- maximal supported version, boundary NOT included, In server version number format
#┃ fatal: false <---- Collector marked `fatal` fails, the entire scrape will abort immediately and marked as failed
#┃ skip: false <---- Collector marked `skip` will not be installed during the planning procedure
#┃
#┃ tags: [cluster, primary] <---- list of strings, which could be:
#┃ * 'cluster' marks this query as cluster level, so it will only execute once for the same PostgreSQL Server
#┃ * 'primary' or 'master' mark this query can only run on a primary instance (WILL NOT execute if pg_is_in_recovery())
#┃ * 'standby' or 'replica' mark this query can only run on a replica instance (WILL execute if pg_is_in_recovery())
#┃ some special tag prefix have special interpretation:
#┃ * 'dbname:<dbname>' means this query will ONLY be executed on database with name '<dbname>'
#┃ * 'username:<user>' means this query will only be executed when connect with user '<user>'
#┃ * 'extension:<extname>' means this query will only be executed when extension '<extname>' is installed
#┃ * 'schema:<nspname>' means this query will only by executed when schema '<nspname>' exist
#┃ * 'not:<negtag>' means this query WILL NOT be executed when exporter is tagged with '<negtag>'
#┃ * '<tag>' means this query WILL be executed when exporter is tagged with '<tag>'
#┃ ( <tag> could not be cluster,primary,standby,master,replica,etc...)
#┃
#┃
#┃ metrics: <---- List of returned columns, each column must have a `name` and `usage`, `rename` and `description` are optional
#┃ - timestamp: <---- Column name, should be exactly the same as returned column name
#┃ usage: GAUGE <---- Metric type, `usage` could be
#┃ * DISCARD: completely ignoring this field
#┃ * LABEL: use columnName=columnValue as a label in metric
#┃ * GAUGE: Mark column as a gauge metric, full name will be '<query.name>_<column.name>'
#┃ * COUNTER: Same as above, except it is a counter rather than a gauge.
#┃ rename: ts <---- [OPTIONAL] Alias, optional, the alias will be used instead of the column name
#┃ description: xxxx <---- [OPTIONAL] Description of the column, will be used as a metric description
#┃ default: 0 <---- [OPTIONAL] Default value, will be used when column is NULL
#┃ scale: 1000 <---- [OPTIONAL] Scale the value by this factor
#┃ - lsn:
#┃ usage: COUNTER
#┃ description: log sequence number, current write location (on primary)
#┃ - insert_lsn:
#┃ usage: COUNTER
#┃ description: primary only, location of current wal inserting
#┃ - write_lsn:
#┃ usage: COUNTER
#┃ description: primary only, location of current wal writing
#┃ - flush_lsn:
#┃ usage: COUNTER
#┃ description: primary only, location of current wal syncing
#┃ - uptime:
#┃ usage: GAUGE
#┃ description: seconds since postmaster start
#┃ - conf_reload_time:
#┃ usage: GAUGE
#┃ description: seconds since last configuration reload
#┃ - is_in_backup:
#┃ usage: GAUGE
#┃ description: 1 if backup is in progress
#┃ - backup_time:
#┃ usage: GAUGE
#┃ description: seconds since the current backup start. null if don't have one
#┃
#┃
#┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
#┃ 4. Collector Presets
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ pg_exporter is shipped with a series of preset collectors (already numbered and ordered by filename)
#┃
#┃ 1xx Basic metrics: basic info, metadata, settings
#┃ 2xx Replication metrics: replication, walreceiver, downstream, sync standby, slots, subscription
#┃ 3xx Persist metrics: size, wal, background writer, checkpoint, recovery, cache, shmem usage
#┃ 4xx Activity metrics: backend count group by state, wait event, locks, xacts, queries
#┃ 5xx Progress metrics: clustering, vacuuming, indexing, basebackup, copy
#┃ 6xx Database metrics: pg_database, publication, subscription
#┃ 7xx Object metrics: pg_class, table, index, function, sequence, default partition
#┃ 8xx Optional metrics: optional metrics collector (disable by default, slow queries)
#┃ 9xx Pgbouncer metrics: metrics from pgbouncer admin database `pgbouncer`
#┃
#┃ 100-599 Metrics for entire database cluster (scrape once)
#┃ 600-899 Metrics for single database instance (scrape for each database ,except for pg_db itself)
#┃
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ 5. Cache TTL
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ Cache can be used for reducing query overhead, it can be enabled by setting a non-zero value for `ttl`
#┃ It is highly recommended to use cache to avoid duplicate scrapes. Especially when you got multiple Prometheus
#┃ scraping the same instance with slow monitoring queries. Setting `ttl` to zero or leaving blank will disable
#┃ result caching, which is the default behavior
#┃
#┃ TTL has to be smaller than your scrape interval. 15s scrape interval and 10s TTL is a good start for
#┃ production environment. Some expensive monitoring queries (such as size/bloat check) will have longer `ttl`
#┃ which can also be used as a mechanism to achieve 'different scrape frequency'
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ 6. Query Timeout
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ Collectors can be configured with an optional Timeout. If the collector's query executes more than that
#┃ timeout, it will be canceled immediately. Setting the `timeout` to 0 or leaving blank will reset it to
#┃ default timeout 0.1 (100ms). Setting it to any negative number will disable the query timeout feature.
#┃ All queries have a default timeout of 100ms, if exceed, the query will be canceled immediately to avoid
#┃ avalanche. You can explicitly overwrite that option. but beware: in some extreme cases, if all your
#┃ timeout sum up greater your scrape/cache interval (usually 15s), the query may still be jammed.
#┃ or, you can just disable potential slow queries.
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ 7. Version Compatibility
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ Each collector has two optional version compatibility parameters: `min_version` and `max_version`.
#┃ These two parameters specify the version compatibility of the collector. If target postgres/pgbouncer
#┃ version is less than `min_version`, or higher than `max_version`, the collector will not be installed.
#┃ These two parameters are using PostgreSQL server version number format, which is a 6-digit integer
#┃ format as <major:2 digit><minor:2 digit>:<release: 2 digit>.
#┃ For example, 090600 stands for 9.6 and 120100 stands for 12.1
#┃ And beware that version compatibility range is left-inclusive right exclusive: [min, max), set to zero or
#┃ leaving blank will affect as -inf or +inf
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ 8. Fatality
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ If a collector is marked with `fatal` falls, the entire scrape operation will be marked as fail and key metrics
#┃ `pg_up` / `pgbouncer_up` will be reset to 0. It is always a good practice to set up AT LEAST ONE fatal
#┃ collector for pg_exporter. `pg.pg_primary_only` and `pgbouncer_list` are the default fatal collector.
#┃
#┃ If a collector without `fatal` flag fails, it will increase global fail counters. But the scrape operation
#┃ will carry on. The entire scrape result will not be marked as faile, thus will not affect the `<xx>_up` metric.
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ 9. Skip
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ Collector with `skip` flag set to true will NOT be installed.
#┃ This could be a handy option to disable collectors
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ 10. Tags and Planning
#┣┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈
#┃ Tags are designed for collector planning & schedule. It can be handy to customize which queries run
#┃ on which instances. And thus you can use one-single monolith config for multiple environments
#┃
#┃ Tags are a list of strings, each string could be:
#┃ Pre-defined special tags
#┃ * 'cluster' marks this collector as cluster level, so it will ONLY BE EXECUTED ONCE for the same PostgreSQL Server
#┃ * 'primary' or 'master' mark this collector as primary-only, so it WILL NOT work iff pg_is_in_recovery()
#┃ * 'standby' or 'replica' mark this collector as replica-only, so it WILL work iff pg_is_in_recovery()
#┃ Special tag prefix which have different interpretation:
#┃ * 'dbname:<dbname>' means this collector will ONLY work on database with name '<dbname>'
#┃ * 'username:<user>' means this collector will ONLY work when connect with user '<user>'
#┃ * 'extension:<extname>' means this collector will ONLY work when extension '<extname>' is installed
#┃ * 'schema:<nspname>' means this collector will only work when schema '<nspname>' exists
#┃ Customized positive tags (filter) and negative tags (taint)
#┃ * 'not:<negtag>' means this collector WILL NOT work when exporter is tagged with '<negtag>'
#┃ * '<tag>' means this query WILL work if exporter is tagged with '<tag>' (special tags not included)
#┃
#┃ pg_exporter will trigger the Planning procedure after connecting to the target. It will gather database facts
#┃ and match them with tags and other metadata (such as supported version range). Collector will only
#┃ be installed if and only if it is compatible with the target server.
#┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━Author: Vonng ([email protected])
License: Apache Apache License Version 2.0
Copyright: 2018-2023 [email protected]
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