infra/services/monitoring/agent.nix

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{
config,
lib,
...
}:
let
cfg = config.bagel.monitoring.grafana-agent;
inherit (lib) mkEnableOption mkOption mkIf types;
passwordAsCredential = "\${CREDENTIALS_DIRECTORY}/password";
in
{
options.bagel.monitoring.grafana-agent = {
enable = (mkEnableOption "Grafana Agent") // { default = true; };
exporters = mkOption {
description = "List of all exporters to scrape";
type = types.listOf (types.submodule {
options.port = mkOption {
description = "Exporter port";
type = types.int;
};
});
default = [];
};
};
config = mkIf cfg.enable {
age.secrets.grafana-agent-password.file = ../../secrets/metrics-push-password.age;
services.grafana-agent = {
enable = true;
credentials.password = config.age.secrets.grafana-agent-password.path;
settings = {
metrics = {
global.remote_write = [
{
url = "https://mimir.forkos.org/api/v1/push";
basic_auth = {
username = "promtail";
password_file = passwordAsCredential;
};
}
];
configs = [
{
name = config.networking.hostName;
scrape_configs = [
{
job_name = config.networking.hostName;
static_configs = [
{ targets = map (e: "localhost:" + (toString e.port)) config.bagel.monitoring.grafana-agent.exporters; }
];
}
];
}
];
};
logs = {
global.clients = [
{
url = "https://loki.forkos.org/loki/api/v1/push";
basic_auth = {
username = "promtail";
password_file = passwordAsCredential;
};
}
];
configs = [
{
name = "journald";
scrape_configs = [
{
job_name = "system";
journal = {
max_age = "12h";
labels = {
job = "systemd-journal";
host = config.networking.hostName;
};
};
relabel_configs = [
{
source_labels = [ "__journal__systemd_unit" ];
target_label = "unit";
}
];
}
];
}
];
positions_directory = "\${STATE_DIRECTORY}/positions";
};
integrations.node_exporter.enable_collectors = [
"processes"
"systemd"
];
};
};
};
}