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nixos/modules/services/monitoring/prometheus/exporters/pgbouncer.nix
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,145 @@ | ||
| { config, lib, pkgs, options }: | ||
|
|
||
| with lib; | ||
|
|
||
| let | ||
| cfg = config.services.prometheus.exporters.pgbouncer; | ||
| in | ||
| { | ||
| port = 9127; | ||
| extraOpts = { | ||
|
|
||
| telemetryPath = mkOption { | ||
| type = types.str; | ||
| default = "/metrics"; | ||
| description = lib.mdDoc '' | ||
| Path under which to expose metrics. | ||
| ''; | ||
| }; | ||
|
|
||
| connectionString = mkOption { | ||
| type = types.str; | ||
| default = ""; | ||
| example = "postgres://admin:@localhost:6432/pgbouncer?sslmode=require"; | ||
| description = lib.mdDoc '' | ||
| Connection string for accessing pgBouncer. | ||
| NOTE: You MUST keep pgbouncer as database name (special internal db)!!! | ||
| NOTE: Admin user (with password or passwordless) MUST exist | ||
| in the services.pgbouncer.authFile if authType other than any is used. | ||
| WARNING: this secret is stored in the world-readable Nix store! | ||
| Use {option}`connectionStringFile` instead. | ||
| ''; | ||
| }; | ||
|
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| connectionStringFile = mkOption { | ||
| type = types.nullOr types.path; | ||
| default = null; | ||
| example = "/run/keys/pgBouncer-connection-string"; | ||
| description = lib.mdDoc '' | ||
| File that contains pgBouncer connection string in format: | ||
| postgres://admin:@localhost:6432/pgbouncer?sslmode=require | ||
| NOTE: You MUST keep pgbouncer as database name (special internal db)!!! | ||
| NOTE: Admin user (with password or passwordless) MUST exist | ||
| in the services.pgbouncer.authFile if authType other than any is used. | ||
| {option}`connectionStringFile` takes precedence over {option}`connectionString` | ||
| ''; | ||
| }; | ||
|
|
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| pidFile = mkOption { | ||
| type = types.nullOr types.str; | ||
| default = null; | ||
| description = lib.mdDoc '' | ||
| Path to PgBouncer pid file. | ||
| If provided, the standard process metrics get exported for the PgBouncer | ||
| process, prefixed with 'pgbouncer_process_...'. The pgbouncer_process exporter | ||
| needs to have read access to files owned by the PgBouncer process. Depends on | ||
| the availability of /proc. | ||
| https://prometheus.io/docs/instrumenting/writing_clientlibs/#process-metrics. | ||
| ''; | ||
| }; | ||
|
|
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| webSystemdSocket = mkOption { | ||
| type = types.bool; | ||
| default = false; | ||
| description = lib.mdDoc '' | ||
| Use systemd socket activation listeners instead of port listeners (Linux only). | ||
| ''; | ||
| }; | ||
|
|
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| logLevel = mkOption { | ||
| type = types.enum ["debug" "info" "warn" "error" ]; | ||
| default = "info"; | ||
| description = lib.mdDoc '' | ||
| Only log messages with the given severity or above. | ||
| ''; | ||
| }; | ||
|
|
||
| logFormat = mkOption { | ||
| type = types.enum ["logfmt" "json"]; | ||
| default = "logfmt"; | ||
| description = lib.mdDoc '' | ||
| Output format of log messages. One of: [logfmt, json] | ||
| ''; | ||
| }; | ||
|
|
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| webConfigFile = mkOption { | ||
| type = types.nullOr types.path; | ||
| default = null; | ||
| description = lib.mdDoc '' | ||
| Path to configuration file that can enable TLS or authentication. | ||
| ''; | ||
| }; | ||
|
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| extraFlags = mkOption { | ||
| type = types.listOf types.str; | ||
| default = [ ]; | ||
| description = lib.mdDoc '' | ||
| Extra commandline options when launching Prometheus. | ||
| ''; | ||
| }; | ||
|
|
||
| }; | ||
|
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| serviceOpts = { | ||
| after = [ "pgbouncer.service" ]; | ||
| serviceConfig = let | ||
| startScript = pkgs.writeShellScriptBin "pgbouncer-start" "${concatStringsSep " " ([ | ||
| "${pkgs.prometheus-pgbouncer-exporter}/bin/pgbouncer_exporter" | ||
| "--web.listen-address ${cfg.listenAddress}:${toString cfg.port}" | ||
| "--pgBouncer.connectionString ${if cfg.connectionStringFile != null then | ||
| "$(head -n1 ${cfg.connectionStringFile})" else "${escapeShellArg cfg.connectionString}"}" | ||
| ] | ||
| ++ optionals (cfg.telemetryPath != null) [ | ||
| "--web.telemetry-path ${escapeShellArg cfg.telemetryPath}" | ||
| ] | ||
| ++ optionals (cfg.pidFile != null) [ | ||
| "--pgBouncer.pid-file= ${escapeShellArg cfg.pidFile}" | ||
| ] | ||
| ++ optionals (cfg.logLevel != null) [ | ||
| "--log.level ${escapeShellArg cfg.logLevel}" | ||
| ] | ||
| ++ optionals (cfg.logFormat != null) [ | ||
| "--log.format ${escapeShellArg cfg.logFormat}" | ||
| ] | ||
| ++ optionals (cfg.webSystemdSocket != false) [ | ||
| "--web.systemd-socket ${escapeShellArg cfg.webSystemdSocket}" | ||
| ] | ||
| ++ optionals (cfg.webConfigFile != null) [ | ||
| "--web.config.file ${escapeShellArg cfg.webConfigFile}" | ||
| ] | ||
| ++ cfg.extraFlags)}"; | ||
| in | ||
| { | ||
| ExecStart = "${startScript}/bin/pgbouncer-start"; | ||
| }; | ||
| }; | ||
| } |
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