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feat: better prometheus integration

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xinyangli 2024-07-30 15:56:02 +08:00
parent 62fe085b31
commit f418cf8620
Signed by: xin
SSH key fingerprint: SHA256:qZ/tzd8lYRtUFSrfBDBMcUqV4GHKxqeqRA3huItgvbk
1 changed files with 212 additions and 62 deletions
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172
modules/nixos/prometheus.nix
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@ -25,22 +25,39 @@ in
};
};
config = mkIf cfg.enable (mkMerge [{
config = mkIf cfg.enable (mkMerge [
{
services.tailscale = {
enable = true;
permitCertUid = config.services.caddy.user;
};
services.caddy = {
enable = true;
virtualHosts."${config.networking.hostName}.coho-tet.ts.net".extraConfig = ''
reverse_proxy 127.0.0.1:${toString config.services.prometheus.port}
'';
};
services.caddy.globalConfig = ''
servers {
metrics
}
'';
services.restic.server.prometheus = cfg.enable;
services.gotosocial.settings = {
metrics-enable = true;
services.gotosocial.settings = mkIf cfg.enable {
metrics-enabled = true;
};
services.prometheus = mkIf cfg.enable {
services.ntfy-sh.settings.enable-metrics = true;
services.prometheus = mkIf cfg.enable
{
enable = true;
port = 9091;
globalConfig.external_labels = { hostname = config.networking.hostName; };
remoteWrite = mkIf cfg.grafana.enable [
{ name = "grafana";
{
name = "grafana";
url = "https://prometheus-prod-24-prod-eu-west-2.grafana.net/api/prom/push";
basic_auth = {
username = "1340065";
@ -51,44 +68,177 @@ in
exporters = {
node = {
enable = true;
enabledCollectors = [ "systemd" ];
enabledCollectors = [
"conntrack"
"diskstats"
"entropy"
"filefd"
"filesystem"
"loadavg"
"meminfo"
"netdev"
"netstat"
"stat"
"time"
"vmstat"
"systemd"
"logind"
"interrupts"
"ksmd"
];
port = 9100;
};
};
scrapeConfigs = [
{ job_name = "prometheus";
{
job_name = "prometheus";
static_configs = [
{ targets = [ "localhost:${toString config.services.prometheus.port}" ]; }
];
}
{ job_name = "node";
{
job_name = "node";
static_configs = [
{ targets = [ "localhost:${toString config.services.prometheus.exporters.node.port}" ]; }
];
}
];
alertmanager = {
enable = true;
listenAddress = "127.0.0.1";
logLevel = "debug";
configuration = {
route = {
receiver = "ntfy";
};
receivers = [
{
name = "ntfy";
webhook_configs = [
{
url = "https://ntfy.xinyang.life/prometheus-alerts?tpl=yes&m=${lib.escapeURL ''
Alert {{.status}}
{{range .alerts}}-----{{range $k,$v := .labels}}
{{$k}}={{$v}}{{end}}
{{end}}
''}";
send_resolved = true;
}
];
}
];
};
};
alertmanagers = [
{
scheme = "http";
static_configs = [
{
targets = [
"${config.services.prometheus.alertmanager.listenAddress}:${toString config.services.prometheus.alertmanager.port}"
];
}
];
}
];
rules = let mkRule = condition: { ... }@rule: (if condition then [ rule ] else [ ]); in [
(lib.generators.toYAML { } {
groups = (mkRule true
{
name = "system_alerts";
rules = [
{
alert = "SystemdFailedUnits";
expr = "node_systemd_unit_state{state=\"failed\"} > 0";
for = "5m";
labels = { severity = "critical"; };
annotations = { summary = "Systemd has failed units on {{ $labels.instance }}"; description = "There are {{ $value }} failed units on {{ $labels.instance }}. Immediate attention required!"; };
}
{
alert = "HighLoadAverage";
expr = "node_load1 > 0.8 * count without (cpu) (node_cpu_seconds_total{mode=\"idle\"})";
for = "1m";
labels = { severity = "warning"; };
annotations = { summary = "High load average detected on {{ $labels.instance }}"; description = "The 1-minute load average ({{ $value }}) exceeds 80% the number of CPUs."; };
}
{
alert = "HighTransmitTraffic";
expr = "rate(node_network_transmit_bytes_total{device!=\"lo\"}[5m]) > 100000000";
for = "1m";
labels = { severity = "warning"; };
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."; };
}
];
}) ++ (mkRule config.services.restic.server.enable {
name = "restic_alerts";
rules = [
{
alert = "ResticCheckFailed";
expr = "restic_check_success == 0";
for = "5m";
labels = { severity = "critical"; };
annotations = { summary = "Restic check failed (instance {{ $labels.instance }})"; description = "Restic check failed\\n VALUE = {{ $value }}\\n LABELS = {{ $labels }}"; };
}
{
alert = "ResticOutdatedBackup";
expr = "time() - restic_backup_timestamp > 518400";
for = "0m";
labels = { severity = "critical"; };
annotations = { summary = "Restic {{ $labels.client_hostname }} / {{ $labels.client_username }} backup is outdated"; description = "Restic backup is outdated\\n VALUE = {{ $value }}\\n LABELS = {{ $labels }}"; };
}
];
}) ++ (mkRule config.services.caddy.enable {
name = "caddy_alerts";
rules = [
{
alert = "UpstreamHealthy";
expr = "caddy_reverse_proxy_upstreams_healthy == 0";
for = "5m";
labels = { severity = "critical"; };
annotations = { summary = "Upstream {{ $labels.unstream }} not healthy"; };
}
{
alert = "HighRequestLatency";
expr = "histogram_quantile(0.95, rate(caddy_http_request_duration_seconds_bucket[10m])) > 0.5";
for = "2m";
labels = { severity = "warning"; };
annotations = { summary = "High request latency on {{ $labels.instance }}"; description = "95th percentile of request latency is above 0.5 seconds for the last 2 minutes."; };
}
];
});
})
];
};
}
{
services.prometheus.scrapeConfigs = [
( mkIf config.services.caddy.enable {
(mkIf config.services.caddy.enable {
job_name = "caddy";
static_configs = [
{ targets = [ "localhost:2019" ]; }
];
})
( mkIf config.services.restic.server.enable {
(mkIf config.services.restic.server.enable {
job_name = "restic";
static_configs = [
{ targets = [ config.services.restic.server.listenAddress ]; }
];
})
( mkIf config.services.gotosocial.enable {
(mkIf config.services.gotosocial.enable {
job_name = "gotosocial";
static_configs = [
{ targets = [ "localhost:${toString config.services.gotosocial.settings.port}" ]; }
];
})
(mkIf config.services.ntfy-sh.enable {
job_name = "ntfy-sh";
static_configs = [
{ targets = [ "auth.xinyang.life" ]; }
];
})
];
}
]);