groups:
  - name: Prometheus

    rules:
      - alert: PrometheusJobMissing
        expr: 'absent(up{job="prometheus"})'
        for: 0m
        labels:
          severity: warning
        annotations:
          summary: Prometheus job missing (instance {{ $labels.instance }})
          description: "A Prometheus job has disappeared\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTargetMissing
        expr: "up == 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus target missing (instance {{ $labels.instance }})
          description: "A Prometheus target has disappeared. An exporter might be crashed.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusAllTargetsMissing
        expr: "sum by (job) (up) == 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus all targets missing (instance {{ $labels.instance }})
          description: "A Prometheus job does not have living target anymore.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTargetMissingWithWarmupTime
        expr: "sum by (instance, job) ((up == 0) * on (instance) group_left(__name__) (node_time_seconds - node_boot_time_seconds > 600))"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus target missing with warmup time (instance {{ $labels.instance }})
          description: "Allow a job time to start up (10 minutes) before alerting that it's down.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusConfigurationReloadFailure
        expr: "prometheus_config_last_reload_successful != 1"
        for: 0m
        labels:
          severity: warning
        annotations:
          summary: Prometheus configuration reload failure (instance {{ $labels.instance }})
          description: "Prometheus configuration reload error\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTooManyRestarts
        expr: 'changes(process_start_time_seconds{job=~"prometheus|pushgateway|alertmanager"}[15m]) > 2'
        for: 0m
        labels:
          severity: warning
        annotations:
          summary: Prometheus too many restarts (instance {{ $labels.instance }})
          description: "Prometheus has restarted more than twice in the last 15 minutes. It might be crashlooping.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusAlertmanagerJobMissing
        expr: 'absent(up{job="alertmanager"})'
        for: 0m
        labels:
          severity: warning
        annotations:
          summary: Prometheus AlertManager job missing (instance {{ $labels.instance }})
          description: "A Prometheus AlertManager job has disappeared\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusAlertmanagerConfigurationReloadFailure
        expr: "alertmanager_config_last_reload_successful != 1"
        for: 0m
        labels:
          severity: warning
        annotations:
          summary: Prometheus AlertManager configuration reload failure (instance {{ $labels.instance }})
          description: "AlertManager configuration reload error\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusAlertmanagerConfigNotSynced
        expr: 'count(count_values("config_hash", alertmanager_config_hash)) > 1'
        for: 0m
        labels:
          severity: warning
        annotations:
          summary: Prometheus AlertManager config not synced (instance {{ $labels.instance }})
          description: "Configurations of AlertManager cluster instances are out of sync\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusAlertmanagerE2eDeadManSwitch
        expr: "vector(1)"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus AlertManager E2E dead man switch (instance {{ $labels.instance }})
          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 }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusNotConnectedToAlertmanager
        expr: "prometheus_notifications_alertmanagers_discovered < 1"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus not connected to alertmanager (instance {{ $labels.instance }})
          description: "Prometheus cannot connect the alertmanager\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusRuleEvaluationFailures
        expr: "increase(prometheus_rule_evaluation_failures_total[3m]) > 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus rule evaluation failures (instance {{ $labels.instance }})
          description: "Prometheus encountered {{ $value }} rule evaluation failures, leading to potentially ignored alerts.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTemplateTextExpansionFailures
        expr: "increase(prometheus_template_text_expansion_failures_total[3m]) > 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus template text expansion failures (instance {{ $labels.instance }})
          description: "Prometheus encountered {{ $value }} template text expansion failures\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusRuleEvaluationSlow
        expr: "prometheus_rule_group_last_duration_seconds > prometheus_rule_group_interval_seconds"
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: Prometheus rule evaluation slow (instance {{ $labels.instance }})
          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 }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusNotificationsBacklog
        expr: "min_over_time(prometheus_notifications_queue_length[10m]) > 0"
        for: 0m
        labels:
          severity: warning
        annotations:
          summary: Prometheus notifications backlog (instance {{ $labels.instance }})
          description: "The Prometheus notification queue has not been empty for 10 minutes\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusAlertmanagerNotificationFailing
        expr: "rate(alertmanager_notifications_failed_total[1m]) > 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus AlertManager notification failing (instance {{ $labels.instance }})
          description: "Alertmanager is failing sending notifications\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTargetEmpty
        expr: "prometheus_sd_discovered_targets == 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus target empty (instance {{ $labels.instance }})
          description: "Prometheus has no target in service discovery\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTargetScrapingSlow
        expr: 'prometheus_target_interval_length_seconds{quantile="0.9"} / on (interval, instance, job) prometheus_target_interval_length_seconds{quantile="0.5"} > 1.05'
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: Prometheus target scraping slow (instance {{ $labels.instance }})
          description: "Prometheus is scraping exporters slowly since it exceeded the requested interval time. Your Prometheus server is under-provisioned.\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusLargeScrape
        expr: "increase(prometheus_target_scrapes_exceeded_sample_limit_total[10m]) > 10"
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: Prometheus large scrape (instance {{ $labels.instance }})
          description: "Prometheus has many scrapes that exceed the sample limit\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTargetScrapeDuplicate
        expr: "increase(prometheus_target_scrapes_sample_duplicate_timestamp_total[5m]) > 0"
        for: 0m
        labels:
          severity: warning
        annotations:
          summary: Prometheus target scrape duplicate (instance {{ $labels.instance }})
          description: "Prometheus has many samples rejected due to duplicate timestamps but different values\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTsdbCheckpointCreationFailures
        expr: "increase(prometheus_tsdb_checkpoint_creations_failed_total[1m]) > 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus TSDB checkpoint creation failures (instance {{ $labels.instance }})
          description: "Prometheus encountered {{ $value }} checkpoint creation failures\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTsdbCheckpointDeletionFailures
        expr: "increase(prometheus_tsdb_checkpoint_deletions_failed_total[1m]) > 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus TSDB checkpoint deletion failures (instance {{ $labels.instance }})
          description: "Prometheus encountered {{ $value }} checkpoint deletion failures\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTsdbCompactionsFailed
        expr: "increase(prometheus_tsdb_compactions_failed_total[1m]) > 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus TSDB compactions failed (instance {{ $labels.instance }})
          description: "Prometheus encountered {{ $value }} TSDB compactions failures\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTsdbHeadTruncationsFailed
        expr: "increase(prometheus_tsdb_head_truncations_failed_total[1m]) > 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus TSDB head truncations failed (instance {{ $labels.instance }})
          description: "Prometheus encountered {{ $value }} TSDB head truncation failures\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTsdbReloadFailures
        expr: "increase(prometheus_tsdb_reloads_failures_total[1m]) > 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus TSDB reload failures (instance {{ $labels.instance }})
          description: "Prometheus encountered {{ $value }} TSDB reload failures\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTsdbWalCorruptions
        expr: "increase(prometheus_tsdb_wal_corruptions_total[1m]) > 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus TSDB WAL corruptions (instance {{ $labels.instance }})
          description: "Prometheus encountered {{ $value }} TSDB WAL corruptions\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTsdbWalTruncationsFailed
        expr: "increase(prometheus_tsdb_wal_truncations_failed_total[1m]) > 0"
        for: 0m
        labels:
          severity: critical
        annotations:
          summary: Prometheus TSDB WAL truncations failed (instance {{ $labels.instance }})
          description: "Prometheus encountered {{ $value }} TSDB WAL truncation failures\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"

      - alert: PrometheusTimeseriesCardinality
        expr: 'label_replace(count by(__name__) ({__name__=~".+"}), "name", "$1", "__name__", "(.+)") > 10000'
        for: 0m
        labels:
          severity: warning
        annotations:
          summary: Prometheus timeseries cardinality (instance {{ $labels.instance }})
          description: "The \"{{ $labels.name }}\" timeseries cardinality is getting very high: {{ $value }}\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
