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services/monitoring: add scraping of Gerrit's internal metrics

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This commit is contained in:
Luke Granger-Brown 2024-07-13 19:11:43 +01:00
parent 48e17163c8
commit 309d54e7b0
2 changed files with 40 additions and 9 deletions
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7
services/gerrit/default.nix
View file

@ -221,5 +221,12 @@ in
};
environment.REVWALK_USE_PRIORITY_QUEUE = "true";
};
age.secrets.gerrit-prometheus-bearer-token.file = ../../secrets/gerrit-prometheus-bearer-token.age;
bagel.monitoring.grafana-agent.exporters.gerrit = {
port = 4778; # grrt
bearerTokenFile = config.age.secrets.gerrit-prometheus-bearer-token.path;
scrapeConfig.metrics_path = "/plugins/metrics-reporter-prometheus/metrics";
};
};
}

42
services/monitoring/agent.nix
View file

@ -20,12 +20,40 @@ in
internally, which ends up exported as `job` label
on all metrics of that exporter.
'';
type = types.attrsOf (types.submodule {
type = types.attrsOf (types.submodule ({ config, name, ... }: {
options.port = mkOption {
description = "Exporter port";
type = types.int;
};
});
options.bearerTokenFile = mkOption {
description = "File containing a bearer token";
type = types.nullOr types.path;
default = null;
};
options.scrapeConfig = mkOption {
description = "Prometheus scrape config";
type = types.attrs;
};
config.scrapeConfig = lib.mkMerge [{
job_name = name;
static_configs = [
{ targets = [ "localhost:${toString config.port}" ]; }
];
} (lib.mkIf (config.bearerTokenFile != null) {
authorization.credentials_file = "\${CREDENTIALS_DIRECTORY}/${name}-bearer-token";
})];
options.secrets = mkOption {
description = "Secrets required for scrape config";
type = types.attrs;
internal = true;
default = {};
};
config.secrets = lib.mkIf (config.bearerTokenFile != null) {
"${name}-bearer-token" = config.bearerTokenFile;
};
}));
default = {};
};
};
@ -35,7 +63,8 @@ in
services.grafana-agent = {
enable = true;
credentials.password = config.age.secrets.grafana-agent-password.path;
credentials = lib.mkMerge ([{ password = config.age.secrets.grafana-agent-password.path; }] ++
lib.mapAttrsToList (name: value: value.secrets) config.bagel.monitoring.grafana-agent.exporters);
settings = {
metrics = {
global.remote_write = [
@ -51,12 +80,7 @@ in
configs = [
{
name = config.networking.hostName;
scrape_configs = lib.mapAttrsToList (name: value: {
job_name = name;
static_configs = [
{ targets = [ "localhost:${toString value.port}" ]; }
];
}) config.bagel.monitoring.grafana-agent.exporters;
scrape_configs = lib.mapAttrsToList (name: value: value.scrapeConfig) config.bagel.monitoring.grafana-agent.exporters;
}
];
};