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feat: add service monitoring alerts for Gitea, Postfix, Dovecot, OpenLDAP, and WireGuard, and consolidate alerting rules in Grafana

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This commit is contained in:
Dominik Polakovics Polakovics
2025-05-31 15:53:26 +02:00
parent 94ee6bc9a4
commit 89b2a1cf45
5 changed files with 364 additions and 275 deletions
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16
hosts/web-arm/modules/grafana/alerting/service/default.nix Normal file
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@@ -0,0 +1,16 @@
{ lib, pkgs, config, ... }:
let
serviceDownAlertRules = (import ./service_down.nix { inherit lib pkgs config; }).grafanaAlertRuleDefinitions;
allServiceRules = serviceDownAlertRules;
in
{
services.grafana.provision.alerting.rules.settings.groups = [
{
name = "Service Alerts";
folder = "Service Monitoring";
interval = "1m";
rules = allServiceRules;
}
];
}

318
hosts/web-arm/modules/grafana/alerting/service/service_down.nix Normal file
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@@ -0,0 +1,318 @@
{ lib, pkgs, config, ... }:
{
grafanaAlertRuleDefinitions = [
# Systemd service monitoring alerts
{
uid = "gitea-service-down-alert-uid";
title = "Gitea Service Down";
condition = "C";
data = [
{
refId = "A";
relativeTimeRange = {
from = 300;
to = 0;
};
datasourceUid = "vm-datasource-uid";
model = {
editorMode = "code";
expr = "node_systemd_unit_state{state=\"active\", name=\"container@git.service\"} OR on() vector(0)";
hide = false;
intervalMs = 1000;
legendFormat = "__auto";
maxDataPoints = 43200;
range = true;
refId = "A";
};
}
{
refId = "B";
datasourceUid = "__expr__";
model = {
type = "reduce";
expression = "A";
reducer = "last";
};
}
{
refId = "C";
datasourceUid = "__expr__";
model = {
type = "math";
expression = "$B < 1";
};
}
];
noDataState = "Alerting";
execErrState = "Alerting";
for = "5m";
annotations = {
description = "Gitea service is down on {{ $labels.instance }}";
summary = "Gitea Service Down";
};
labels = {
severity = "critical";
};
}
{
uid = "gitea-runner-service-down-alert-uid";
title = "Gitea Runner Service Down";
condition = "C";
data = [
{
refId = "A";
relativeTimeRange = {
from = 300;
to = 0;
};
datasourceUid = "vm-datasource-uid";
model = {
editorMode = "code";
expr = "node_systemd_unit_state{state=\"active\", name=\"microvm@git-runner-1.service \"} OR on() vector(0)";
hide = false;
intervalMs = 1000;
legendFormat = "__auto";
maxDataPoints = 43200;
range = true;
refId = "A";
};
}
{
refId = "B";
datasourceUid = "__expr__";
model = {
type = "reduce";
expression = "A";
reducer = "last";
};
}
{
refId = "C";
datasourceUid = "__expr__";
model = {
type = "math";
expression = "$B < 1";
};
}
];
noDataState = "Alerting";
execErrState = "Alerting";
for = "5m";
annotations = {
description = "Gitea Runner service is down on {{ $labels.instance }}";
summary = "Gitea Runner Service Down";
};
labels = {
severity = "critical";
};
}
{
uid = "postfix-service-down-alert-uid";
title = "Postfix Service Down";
condition = "C";
data = [
{
refId = "A";
relativeTimeRange = {
from = 300;
to = 0;
};
datasourceUid = "vm-datasource-uid";
model = {
editorMode = "code";
expr = "node_systemd_unit_state{state=\"active\", name=\"postfix.service\"} OR on() vector(0)";
hide = false;
intervalMs = 1000;
legendFormat = "__auto";
maxDataPoints = 43200;
range = true;
refId = "A";
};
}
{
refId = "B";
datasourceUid = "__expr__";
model = {
type = "reduce";
expression = "A";
reducer = "last";
};
}
{
refId = "C";
datasourceUid = "__expr__";
model = {
type = "math";
expression = "$B < 1";
};
}
];
noDataState = "Alerting";
execErrState = "Alerting";
for = "5m";
annotations = {
description = "Postfix service is down on {{ $labels.instance }}";
summary = "Postfix Service Down";
};
labels = {
severity = "critical";
};
}
{
uid = "dovecot-service-down-alert-uid";
title = "Dovecot Service Down";
condition = "C";
data = [
{
refId = "A";
relativeTimeRange = {
from = 300;
to = 0;
};
datasourceUid = "vm-datasource-uid";
model = {
editorMode = "code";
expr = "node_systemd_unit_state{state=\"active\", name=\"dovecot2.service\"} OR on() vector(0)";
hide = false;
intervalMs = 1000;
legendFormat = "__auto";
maxDataPoints = 43200;
range = true;
refId = "A";
};
}
{
refId = "B";
datasourceUid = "__expr__";
model = {
type = "reduce";
expression = "A";
reducer = "last";
};
}
{
refId = "C";
datasourceUid = "__expr__";
model = {
type = "math";
expression = "$B < 1";
};
}
];
noDataState = "Alerting";
execErrState = "Alerting";
for = "5m";
annotations = {
description = "Dovecot service is down on {{ $labels.instance }}";
summary = "Dovecot Service Down";
};
labels = {
severity = "critical";
};
}
{
uid = "openldap-service-down-alert-uid";
title = "OpenLDAP Service Down";
condition = "C";
data = [
{
refId = "A";
relativeTimeRange = {
from = 300;
to = 0;
};
datasourceUid = "vm-datasource-uid";
model = {
editorMode = "code";
expr = "node_systemd_unit_state{state=\"active\", name=\"openldap.service\"} OR on() vector(0)";
hide = false;
intervalMs = 1000;
legendFormat = "__auto";
maxDataPoints = 43200;
range = true;
refId = "A";
};
}
{
refId = "B";
datasourceUid = "__expr__";
model = {
type = "reduce";
expression = "A";
reducer = "last";
};
}
{
refId = "C";
datasourceUid = "__expr__";
model = {
type = "math";
expression = "$B < 1";
};
}
];
noDataState = "Alerting";
execErrState = "Alerting";
for = "5m";
annotations = {
description = "OpenLDAP service is down on {{ $labels.instance }}";
summary = "OpenLDAP Service Down";
};
labels = {
severity = "critical";
};
}
{
uid = "wireguard-service-down-alert-uid";
title = "WireGuard Service Down";
condition = "C";
data = [
{
refId = "A";
relativeTimeRange = {
from = 300;
to = 0;
};
datasourceUid = "vm-datasource-uid";
model = {
editorMode = "code";
expr = "node_systemd_unit_state{state=\"active\", name=\"wireguard-wg_cloonar.service\"} OR on() vector(0)";
hide = false;
intervalMs = 1000;
legendFormat = "__auto";
maxDataPoints = 43200;
range = true;
refId = "A";
};
}
{
refId = "B";
datasourceUid = "__expr__";
model = {
type = "reduce";
expression = "A";
reducer = "last";
};
}
{
refId = "C";
datasourceUid = "__expr__";
model = {
type = "math";
expression = "$B < 1";
};
}
];
noDataState = "Alerting";
execErrState = "Alerting";
for = "5m";
annotations = {
description = "WireGuard service is down on {{ $labels.instance }}";
summary = "WireGuard Service Down";
};
labels = {
severity = "critical";
};
}
];
}

1
hosts/web-arm/modules/grafana/default.nix
View File

@@ -35,6 +35,7 @@ in
# ./alerting/inode_usage.nix
# ./alerting/ram_usage.nix
./alerting/system/default.nix # Added: Imports the consolidated system alerts module
./alerting/service/default.nix # Added: Imports the new service alerts module
# ... other rule files can be added here ...
./datasources/victoriametrics.nix
];