prometheus & alertmanager: add self-alerting
Add self-alerting for Prometheus and Alertmanager using rules from https://samber.github.io/awesome-prometheus-alerts/rules
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@ -22,6 +22,13 @@ scrape_configs:
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static_configs:
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static_configs:
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- targets:
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- targets:
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- localhost:9090
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- localhost:9090
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- job_name: alertmanager
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honor_timestamps: true
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metrics_path: /metrics
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scheme: http
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static_configs:
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- targets:
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- alertmanager:9093
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- job_name: c3lingo
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- job_name: c3lingo
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honor_timestamps: true
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honor_timestamps: true
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scrape_interval: 5s
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scrape_interval: 5s
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@ -58,15 +65,6 @@ scrape_configs:
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static_configs:
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static_configs:
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- targets:
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- targets:
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- jitsi.hamburg.ccc.de:9888 # Jitsi Video Bridge
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- jitsi.hamburg.ccc.de:9888 # Jitsi Video Bridge
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- job_name: chaosknoten
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honor_timestamps: true
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scrape_interval: 5s
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scrape_timeout: 1s
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metrics_path: /metrics
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scheme: http
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static_configs:
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- targets:
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- chaosknoten.hamburg.ccc.de:9100 # Node Exporter
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- job_name: 'pve'
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- job_name: 'pve'
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static_configs:
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static_configs:
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- targets:
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- targets:
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@ -85,6 +83,7 @@ scrape_configs:
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replacement: pve-exporter:9221
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replacement: pve-exporter:9221
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- job_name: hosts
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- job_name: hosts
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static_configs:
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static_configs:
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# Wieske Chaosknoten VMs
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- labels:
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- labels:
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site: wieske
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site: wieske
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type: virtual_machine
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type: virtual_machine
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@ -101,3 +100,9 @@ scrape_configs:
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- woodpecker-intern.hamburg.ccc.de:9100
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- woodpecker-intern.hamburg.ccc.de:9100
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- penpot-intern.hamburg.ccc.de:9100
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- penpot-intern.hamburg.ccc.de:9100
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- jitsi.hamburg.ccc.de:9100
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- jitsi.hamburg.ccc.de:9100
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# Wieske Physical Machines
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- labels:
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site: wieske
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type: physical_machine
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targets:
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- chaosknoten.hamburg.ccc.de:9100
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@ -311,3 +311,222 @@ groups:
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annotations:
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annotations:
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summary: Host requires reboot (instance {{ $labels.instance }})
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summary: Host requires reboot (instance {{ $labels.instance }})
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description: "{{ $labels.instance }} requires a reboot.\n VALUE = {{ $value }}"
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description: "{{ $labels.instance }} requires a reboot.\n VALUE = {{ $value }}"
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- name: prometheus
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rules:
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- alert: PrometheusJobMissing
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expr: absent(up{job="prometheus"})
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for: 0m
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labels:
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severity: warning
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annotations:
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summary: Prometheus job missing (instance {{ $labels.instance }})
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description: "A Prometheus job has disappeared\n VALUE = {{ $value }}"
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- alert: PrometheusTargetMissing
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expr: up == 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus target missing (instance {{ $labels.instance }})
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description: "A Prometheus target has disappeared. An exporter might be crashed.\n VALUE = {{ $value }}"
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- alert: PrometheusAllTargetsMissing
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expr: sum by (job) (up) == 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus all targets missing (instance {{ $labels.instance }})
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description: "A Prometheus job does not have living target anymore.\n VALUE = {{ $value }}"
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- alert: PrometheusConfigurationReloadFailure
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expr: prometheus_config_last_reload_successful != 1
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for: 0m
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labels:
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severity: warning
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annotations:
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summary: Prometheus configuration reload failure (instance {{ $labels.instance }})
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description: "Prometheus configuration reload error\n VALUE = {{ $value }}"
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- alert: PrometheusTooManyRestarts
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expr: changes(process_start_time_seconds{job=~"prometheus|pushgateway|alertmanager"}[15m]) > 2
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for: 0m
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labels:
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severity: warning
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annotations:
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summary: Prometheus too many restarts (instance {{ $labels.instance }})
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description: "Prometheus has restarted more than twice in the last 15 minutes. It might be crashlooping.\n VALUE = {{ $value }}"
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- alert: PrometheusAlertmanagerJobMissing
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expr: absent(up{job="alertmanager"})
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for: 0m
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labels:
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severity: warning
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annotations:
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summary: Prometheus AlertManager job missing (instance {{ $labels.instance }})
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description: "A Prometheus AlertManager job has disappeared\n VALUE = {{ $value }}"
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- alert: PrometheusAlertmanagerConfigurationReloadFailure
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expr: alertmanager_config_last_reload_successful != 1
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for: 0m
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labels:
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severity: warning
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annotations:
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summary: Prometheus AlertManager configuration reload failure (instance {{ $labels.instance }})
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description: "AlertManager configuration reload error\n VALUE = {{ $value }}"
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- alert: PrometheusAlertmanagerConfigNotSynced
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expr: count(count_values("config_hash", alertmanager_config_hash)) > 1
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for: 0m
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labels:
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severity: warning
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annotations:
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summary: Prometheus AlertManager config not synced (instance {{ $labels.instance }})
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description: "Configurations of AlertManager cluster instances are out of sync\n VALUE = {{ $value }}"
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# For testing.
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# - alert: PrometheusAlertmanagerE2eDeadManSwitch
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# expr: vector(1)
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# for: 0m
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# labels:
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# severity: critical
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# annotations:
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# summary: Prometheus AlertManager E2E dead man switch (instance {{ $labels.instance }})
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# description: "Prometheus DeadManSwitch is an always-firing alert. It's used as an end-to-end test of Prometheus through the Alertmanager.\n VALUE = {{ $value }}"
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- alert: PrometheusNotConnectedToAlertmanager
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expr: prometheus_notifications_alertmanagers_discovered < 1
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus not connected to alertmanager (instance {{ $labels.instance }})
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description: "Prometheus cannot connect the alertmanager\n VALUE = {{ $value }}"
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- alert: PrometheusRuleEvaluationFailures
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expr: increase(prometheus_rule_evaluation_failures_total[3m]) > 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus rule evaluation failures (instance {{ $labels.instance }})
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description: "Prometheus encountered {{ $value }} rule evaluation failures, leading to potentially ignored alerts.\n VALUE = {{ $value }}"
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- alert: PrometheusTemplateTextExpansionFailures
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expr: increase(prometheus_template_text_expansion_failures_total[3m]) > 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus template text expansion failures (instance {{ $labels.instance }})
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description: "Prometheus encountered {{ $value }} template text expansion failures\n VALUE = {{ $value }}"
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- alert: PrometheusRuleEvaluationSlow
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expr: prometheus_rule_group_last_duration_seconds > prometheus_rule_group_interval_seconds
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for: 5m
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labels:
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severity: warning
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annotations:
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summary: Prometheus rule evaluation slow (instance {{ $labels.instance }})
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description: "Prometheus rule evaluation took more time than the scheduled interval. It indicates a slower storage backend access or too complex query.\n VALUE = {{ $value }}"
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- alert: PrometheusNotificationsBacklog
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expr: min_over_time(prometheus_notifications_queue_length[10m]) > 0
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for: 0m
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labels:
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severity: warning
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annotations:
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summary: Prometheus notifications backlog (instance {{ $labels.instance }})
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description: "The Prometheus notification queue has not been empty for 10 minutes\n VALUE = {{ $value }}"
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- alert: PrometheusAlertmanagerNotificationFailing
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expr: rate(alertmanager_notifications_failed_total[1m]) > 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus AlertManager notification failing (instance {{ $labels.instance }})
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description: "Alertmanager is failing sending notifications\n VALUE = {{ $value }}"
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- alert: PrometheusTargetEmpty
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expr: prometheus_sd_discovered_targets == 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus target empty (instance {{ $labels.instance }})
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description: "Prometheus has no target in service discovery\n VALUE = {{ $value }}"
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- alert: PrometheusTargetScrapingSlow
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expr: prometheus_target_interval_length_seconds{quantile="0.9"} / on (interval, instance, job) prometheus_target_interval_length_seconds{quantile="0.5"} > 1.05
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for: 5m
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labels:
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severity: warning
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annotations:
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summary: Prometheus target scraping slow (instance {{ $labels.instance }})
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description: "Prometheus is scraping exporters slowly since it exceeded the requested interval time. Your Prometheus server is under-provisioned.\n VALUE = {{ $value }}"
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- alert: PrometheusLargeScrape
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expr: increase(prometheus_target_scrapes_exceeded_sample_limit_total[10m]) > 10
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for: 5m
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labels:
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severity: warning
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annotations:
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summary: Prometheus large scrape (instance {{ $labels.instance }})
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description: "Prometheus has many scrapes that exceed the sample limit\n VALUE = {{ $value }}"
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- alert: PrometheusTargetScrapeDuplicate
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expr: increase(prometheus_target_scrapes_sample_duplicate_timestamp_total[5m]) > 0
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for: 0m
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labels:
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severity: warning
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annotations:
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summary: Prometheus target scrape duplicate (instance {{ $labels.instance }})
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description: "Prometheus has many samples rejected due to duplicate timestamps but different values\n VALUE = {{ $value }}"
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- alert: PrometheusTsdbCheckpointCreationFailures
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expr: increase(prometheus_tsdb_checkpoint_creations_failed_total[1m]) > 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus TSDB checkpoint creation failures (instance {{ $labels.instance }})
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description: "Prometheus encountered {{ $value }} checkpoint creation failures\n VALUE = {{ $value }}"
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- alert: PrometheusTsdbCheckpointDeletionFailures
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expr: increase(prometheus_tsdb_checkpoint_deletions_failed_total[1m]) > 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus TSDB checkpoint deletion failures (instance {{ $labels.instance }})
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description: "Prometheus encountered {{ $value }} checkpoint deletion failures\n VALUE = {{ $value }}"
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- alert: PrometheusTsdbCompactionsFailed
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expr: increase(prometheus_tsdb_compactions_failed_total[1m]) > 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus TSDB compactions failed (instance {{ $labels.instance }})
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description: "Prometheus encountered {{ $value }} TSDB compactions failures\n VALUE = {{ $value }}"
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- alert: PrometheusTsdbHeadTruncationsFailed
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expr: increase(prometheus_tsdb_head_truncations_failed_total[1m]) > 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus TSDB head truncations failed (instance {{ $labels.instance }})
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description: "Prometheus encountered {{ $value }} TSDB head truncation failures\n VALUE = {{ $value }}"
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- alert: PrometheusTsdbReloadFailures
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expr: increase(prometheus_tsdb_reloads_failures_total[1m]) > 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus TSDB reload failures (instance {{ $labels.instance }})
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description: "Prometheus encountered {{ $value }} TSDB reload failures\n VALUE = {{ $value }}"
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- alert: PrometheusTsdbWalCorruptions
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expr: increase(prometheus_tsdb_wal_corruptions_total[1m]) > 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus TSDB WAL corruptions (instance {{ $labels.instance }})
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description: "Prometheus encountered {{ $value }} TSDB WAL corruptions\n VALUE = {{ $value }}"
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- alert: PrometheusTsdbWalTruncationsFailed
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expr: increase(prometheus_tsdb_wal_truncations_failed_total[1m]) > 0
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for: 0m
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labels:
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severity: critical
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annotations:
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summary: Prometheus TSDB WAL truncations failed (instance {{ $labels.instance }})
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description: "Prometheus encountered {{ $value }} TSDB WAL truncation failures\n VALUE = {{ $value }}"
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- alert: PrometheusTimeseriesCardinality
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expr: label_replace(count by(__name__) ({__name__=~".+"}), "name", "$1", "__name__", "(.+)") > 10000
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for: 0m
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labels:
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severity: warning
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annotations:
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summary: Prometheus timeseries cardinality (instance {{ $labels.instance }})
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description: "The \"{{ $labels.name }}\" timeseries cardinality is getting very high: {{ $value }}\n VALUE = {{ $value }}"
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