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Merge: nixos/vmalert: support multiple instances (#410856)
This commit is contained in:
Maximilian Bosch
GitHub
commit
d92e71021b
4 changed files with 159 additions and 109 deletions
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@ -10,9 +10,9 @@ let
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format = pkgs.formats.yaml { };
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confOpts = concatStringsSep " \\\n" (
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mapAttrsToList mkLine (filterAttrs (_: v: v != false) cfg.settings)
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);
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mkConfOpts =
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settings:
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concatStringsSep " \\\n" (mapAttrsToList mkLine (filterAttrs (_: v: v != false) settings));
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confType =
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with types;
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let
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@ -33,124 +33,171 @@ let
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concatMapStringsSep " " (v: "-${key}=${escapeShellArg (toString v)}") value
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else
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"-${key}=${escapeShellArg (toString value)}";
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vmalertName = name: "vmalert" + lib.optionalString (name != "") ("-" + name);
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enabledInstances = lib.filterAttrs (name: conf: conf.enable) config.services.vmalert.instances;
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in
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{
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imports = [
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(lib.mkRenamedOptionModule
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[ "services" "vmalert" "enable" ]
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[ "services" "vmalert" "instances" "" "enable" ]
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)
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(lib.mkRenamedOptionModule
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[ "services" "vmalert" "rules" ]
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[ "services" "vmalert" "instances" "" "rules" ]
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)
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(lib.mkRenamedOptionModule
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[ "services" "vmalert" "settings" ]
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[ "services" "vmalert" "instances" "" "settings" ]
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)
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];
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# interface
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options.services.vmalert = {
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enable = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = ''
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Wether to enable VictoriaMetrics's `vmalert`.
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options.services.vmalert.package = mkPackageOption pkgs "victoriametrics" { };
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`vmalert` evaluates alerting and recording rules against a data source, sends notifications via Alertmanager.
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'';
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};
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options.services.vmalert.instances = mkOption {
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default = { };
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package = mkPackageOption pkgs "victoriametrics" { };
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description = ''
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Define multiple instances of vmalert.
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'';
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settings = mkOption {
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type = types.submodule {
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freeformType = confType;
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options = {
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type = types.attrsOf (
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types.submodule (
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{ name, config, ... }:
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{
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options = {
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enable = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = ''
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Wether to enable VictoriaMetrics's `vmalert`.
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"datasource.url" = mkOption {
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type = types.nonEmptyStr;
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example = "http://localhost:8428";
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description = ''
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Datasource compatible with Prometheus HTTP API.
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'';
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`vmalert` evaluates alerting and recording rules against a data source, sends notifications via Alertmanager.
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'';
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};
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settings = mkOption {
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type = types.submodule {
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freeformType = confType;
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options = {
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"datasource.url" = mkOption {
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type = types.nonEmptyStr;
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example = "http://localhost:8428";
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description = ''
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Datasource compatible with Prometheus HTTP API.
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'';
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};
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"notifier.url" = mkOption {
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type = with types; listOf nonEmptyStr;
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default = [ ];
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example = [ "http://127.0.0.1:9093" ];
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description = ''
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Prometheus Alertmanager URL. List all Alertmanager URLs if it runs in the cluster mode to ensure high availability.
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'';
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};
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"rule" = mkOption {
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type = with types; listOf path;
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description = ''
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Path to the files with alerting and/or recording rules.
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::: {.note}
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Consider using the {option}`services.vmalert.instances.<name>.rules` option as a convenient alternative for declaring rules
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directly in the `nix` language.
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:::
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'';
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};
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};
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};
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default = { };
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example = {
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"datasource.url" = "http://localhost:8428";
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"datasource.disableKeepAlive" = true;
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"datasource.showURL" = false;
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"rule" = [
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"http://<some-server-addr>/path/to/rules"
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"dir/*.yaml"
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];
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};
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description = ''
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`vmalert` configuration, passed via command line flags. Refer to
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<https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/app/vmalert/README.md#configuration>
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for details on supported values.
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'';
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};
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rules = mkOption {
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type = format.type;
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default = { };
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example = {
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group = [
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{
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name = "TestGroup";
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rules = [
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{
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alert = "ExampleAlertAlwaysFiring";
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expr = ''
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sum by(job)
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(up == 1)
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'';
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}
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];
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}
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];
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};
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description = ''
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A list of the given alerting or recording rules against configured `"datasource.url"` compatible with
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Prometheus HTTP API for `vmalert` to execute. Refer to
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<https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/app/vmalert/README.md#rules>
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for details on supported values.
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'';
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};
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};
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"notifier.url" = mkOption {
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type = with types; listOf nonEmptyStr;
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default = [ ];
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example = [ "http://127.0.0.1:9093" ];
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description = ''
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Prometheus Alertmanager URL. List all Alertmanager URLs if it runs in the cluster mode to ensure high availability.
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'';
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};
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"rule" = mkOption {
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type = with types; listOf path;
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description = ''
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Path to the files with alerting and/or recording rules.
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::: {.note}
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Consider using the {option}`services.vmalert.rules` option as a convenient alternative for declaring rules
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directly in the `nix` language.
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:::
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'';
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};
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};
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};
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default = { };
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example = {
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"datasource.url" = "http://localhost:8428";
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"datasource.disableKeepAlive" = true;
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"datasource.showURL" = false;
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"rule" = [
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"http://<some-server-addr>/path/to/rules"
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"dir/*.yaml"
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];
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};
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description = ''
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`vmalert` configuration, passed via command line flags. Refer to
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<https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/app/vmalert/README.md#configuration>
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for details on supported values.
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'';
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};
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rules = mkOption {
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type = format.type;
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default = { };
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example = {
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group = [
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{
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name = "TestGroup";
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rules = [
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{
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alert = "ExampleAlertAlwaysFiring";
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expr = ''
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sum by(job)
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(up == 1)
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'';
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}
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config = {
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settings.rule = [
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"/etc/${vmalertName name}/rules.yml"
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];
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}
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];
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};
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description = ''
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A list of the given alerting or recording rules against configured `"datasource.url"` compatible with
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Prometheus HTTP API for `vmalert` to execute. Refer to
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<https://github.com/VictoriaMetrics/VictoriaMetrics/blob/master/app/vmalert/README.md#rules>
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for details on supported values.
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'';
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};
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};
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}
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)
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);
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};
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# implementation
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config = mkIf cfg.enable {
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config = mkIf (enabledInstances != { }) {
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environment.etc = lib.mapAttrs' (
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name:
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{ rules, ... }:
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lib.nameValuePair "${vmalertName name}/rules.yml" {
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source = format.generate "rules.yml" rules;
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}
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) enabledInstances;
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environment.etc."vmalert/rules.yml".source = format.generate "rules.yml" cfg.rules;
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systemd.services = lib.mapAttrs' (
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name:
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{ settings, ... }:
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let
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name' = vmalertName name;
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in
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lib.nameValuePair name' {
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description = "vmalert service";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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reloadTriggers = [ config.environment.etc."${name'}/rules.yml".source ];
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services.vmalert.settings.rule = [
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"/etc/vmalert/rules.yml"
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];
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systemd.services.vmalert = {
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description = "vmalert service";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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reloadTriggers = [ config.environment.etc."vmalert/rules.yml".source ];
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serviceConfig = {
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DynamicUser = true;
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Restart = "on-failure";
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ExecStart = "${cfg.package}/bin/vmalert ${confOpts}";
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ExecReload = ''${pkgs.coreutils}/bin/kill -SIGHUP "$MAINPID"'';
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};
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};
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serviceConfig = {
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DynamicUser = true;
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Restart = "on-failure";
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ExecStart = "${cfg.package}/bin/vmalert ${mkConfOpts settings}";
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ExecReload = ''${pkgs.coreutils}/bin/kill -SIGHUP "$MAINPID"'';
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};
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}
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) enabledInstances;
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};
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}
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