feat: better prometheus integration
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SHA256:qZ/tzd8lYRtUFSrfBDBMcUqV4GHKxqeqRA3huItgvbk
1 changed files with 212 additions and 62 deletions
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@ -25,71 +25,221 @@ in
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};
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};
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config = mkIf cfg.enable (mkMerge [{
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services.caddy.globalConfig = ''
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servers {
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metrics
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}
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'';
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services.restic.server.prometheus = cfg.enable;
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services.gotosocial.settings = {
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metrics-enable = true;
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};
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services.prometheus = mkIf cfg.enable {
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enable = true;
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port = 9091;
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globalConfig.external_labels = { hostname = config.networking.hostName; };
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remoteWrite = mkIf cfg.grafana.enable [
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{ name = "grafana";
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url = "https://prometheus-prod-24-prod-eu-west-2.grafana.net/api/prom/push";
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basic_auth = {
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username = "1340065";
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password_file = cfg.grafana.password_file;
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};
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}
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];
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exporters = {
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node = {
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enable = true;
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enabledCollectors = [ "systemd" ];
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port = 9100;
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};
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config = mkIf cfg.enable (mkMerge [
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{
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services.tailscale = {
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enable = true;
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permitCertUid = config.services.caddy.user;
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};
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scrapeConfigs = [
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{ job_name = "prometheus";
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static_configs = [
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{ targets = [ "localhost:${toString config.services.prometheus.port}" ]; }
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];
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services.caddy = {
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enable = true;
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virtualHosts."${config.networking.hostName}.coho-tet.ts.net".extraConfig = ''
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reverse_proxy 127.0.0.1:${toString config.services.prometheus.port}
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'';
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};
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services.caddy.globalConfig = ''
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servers {
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metrics
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}
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{ job_name = "node";
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static_configs = [
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{ targets = [ "localhost:${toString config.services.prometheus.exporters.node.port}" ]; }
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'';
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services.restic.server.prometheus = cfg.enable;
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services.gotosocial.settings = mkIf cfg.enable {
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metrics-enabled = true;
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};
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services.ntfy-sh.settings.enable-metrics = true;
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services.prometheus = mkIf cfg.enable
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{
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enable = true;
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port = 9091;
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globalConfig.external_labels = { hostname = config.networking.hostName; };
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remoteWrite = mkIf cfg.grafana.enable [
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{
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name = "grafana";
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url = "https://prometheus-prod-24-prod-eu-west-2.grafana.net/api/prom/push";
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basic_auth = {
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username = "1340065";
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password_file = cfg.grafana.password_file;
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};
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}
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];
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}
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exporters = {
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node = {
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enable = true;
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enabledCollectors = [
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"conntrack"
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"diskstats"
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"entropy"
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"filefd"
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"filesystem"
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"loadavg"
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"meminfo"
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"netdev"
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"netstat"
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"stat"
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"time"
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"vmstat"
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"systemd"
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"logind"
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"interrupts"
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"ksmd"
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];
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port = 9100;
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};
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};
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scrapeConfigs = [
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{
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job_name = "prometheus";
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static_configs = [
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{ targets = [ "localhost:${toString config.services.prometheus.port}" ]; }
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];
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}
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{
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job_name = "node";
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static_configs = [
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{ targets = [ "localhost:${toString config.services.prometheus.exporters.node.port}" ]; }
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];
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}
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];
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alertmanager = {
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enable = true;
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listenAddress = "127.0.0.1";
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logLevel = "debug";
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configuration = {
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route = {
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receiver = "ntfy";
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};
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receivers = [
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{
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name = "ntfy";
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webhook_configs = [
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{
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url = "https://ntfy.xinyang.life/prometheus-alerts?tpl=yes&m=${lib.escapeURL ''
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Alert {{.status}}
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{{range .alerts}}-----{{range $k,$v := .labels}}
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{{$k}}={{$v}}{{end}}
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{{end}}
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''}";
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send_resolved = true;
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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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alertmanagers = [
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{
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scheme = "http";
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static_configs = [
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{
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targets = [
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"${config.services.prometheus.alertmanager.listenAddress}:${toString config.services.prometheus.alertmanager.port}"
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];
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}
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];
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}
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];
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rules = let mkRule = condition: { ... }@rule: (if condition then [ rule ] else [ ]); in [
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(lib.generators.toYAML { } {
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groups = (mkRule true
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{
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name = "system_alerts";
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rules = [
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{
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alert = "SystemdFailedUnits";
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expr = "node_systemd_unit_state{state=\"failed\"} > 0";
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for = "5m";
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labels = { severity = "critical"; };
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annotations = { summary = "Systemd has failed units on {{ $labels.instance }}"; description = "There are {{ $value }} failed units on {{ $labels.instance }}. Immediate attention required!"; };
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}
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{
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alert = "HighLoadAverage";
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expr = "node_load1 > 0.8 * count without (cpu) (node_cpu_seconds_total{mode=\"idle\"})";
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for = "1m";
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labels = { severity = "warning"; };
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annotations = { summary = "High load average detected on {{ $labels.instance }}"; description = "The 1-minute load average ({{ $value }}) exceeds 80% the number of CPUs."; };
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}
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{
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alert = "HighTransmitTraffic";
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expr = "rate(node_network_transmit_bytes_total{device!=\"lo\"}[5m]) > 100000000";
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for = "1m";
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labels = { severity = "warning"; };
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annotations = { summary = "High network transmit traffic on {{ $labels.instance }} ({{ $labels.device }})"; description = "The network interface {{ $labels.device }} on {{ $labels.instance }} is transmitting data at a rate exceeding 100 MB/s for the last 1 minute."; };
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}
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];
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}) ++ (mkRule config.services.restic.server.enable {
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name = "restic_alerts";
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rules = [
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{
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alert = "ResticCheckFailed";
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expr = "restic_check_success == 0";
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for = "5m";
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labels = { severity = "critical"; };
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annotations = { summary = "Restic check failed (instance {{ $labels.instance }})"; description = "Restic check failed\\n VALUE = {{ $value }}\\n LABELS = {{ $labels }}"; };
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}
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{
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alert = "ResticOutdatedBackup";
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expr = "time() - restic_backup_timestamp > 518400";
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for = "0m";
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labels = { severity = "critical"; };
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annotations = { summary = "Restic {{ $labels.client_hostname }} / {{ $labels.client_username }} backup is outdated"; description = "Restic backup is outdated\\n VALUE = {{ $value }}\\n LABELS = {{ $labels }}"; };
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}
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];
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}) ++ (mkRule config.services.caddy.enable {
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name = "caddy_alerts";
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rules = [
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{
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alert = "UpstreamHealthy";
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expr = "caddy_reverse_proxy_upstreams_healthy == 0";
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for = "5m";
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labels = { severity = "critical"; };
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annotations = { summary = "Upstream {{ $labels.unstream }} not healthy"; };
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}
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{
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alert = "HighRequestLatency";
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expr = "histogram_quantile(0.95, rate(caddy_http_request_duration_seconds_bucket[10m])) > 0.5";
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for = "2m";
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labels = { severity = "warning"; };
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annotations = { summary = "High request latency on {{ $labels.instance }}"; description = "95th percentile of request latency is above 0.5 seconds for the last 2 minutes."; };
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}
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];
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});
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})
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];
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};
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}
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{
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services.prometheus.scrapeConfigs = [
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(mkIf config.services.caddy.enable {
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job_name = "caddy";
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static_configs = [
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{ targets = [ "localhost:2019" ]; }
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];
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})
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(mkIf config.services.restic.server.enable {
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job_name = "restic";
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static_configs = [
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{ targets = [ config.services.restic.server.listenAddress ]; }
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];
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})
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(mkIf config.services.gotosocial.enable {
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job_name = "gotosocial";
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static_configs = [
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{ targets = [ "localhost:${toString config.services.gotosocial.settings.port}" ]; }
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];
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})
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(mkIf config.services.ntfy-sh.enable {
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job_name = "ntfy-sh";
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static_configs = [
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{ targets = [ "auth.xinyang.life" ]; }
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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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services.prometheus.scrapeConfigs = [
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( mkIf config.services.caddy.enable {
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job_name = "caddy";
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static_configs = [
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{ targets = [ "localhost:2019" ]; }
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];
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})
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( mkIf config.services.restic.server.enable {
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job_name = "restic";
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static_configs = [
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{ targets = [ config.services.restic.server.listenAddress ]; }
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];
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})
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( mkIf config.services.gotosocial.enable {
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job_name = "gotosocial";
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static_configs = [
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{ targets = [ "localhost:${toString config.services.gotosocial.settings.port}" ]; }
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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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