59 lines
2.0 KiB
YAML
59 lines
2.0 KiB
YAML
groups:
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- name: Prometheus self-monitoring
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rules:
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- alert: Prometheus target missing
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expr: 'up == 0'
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annotations:
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description: A Prometheus target has disappeared. An exporter might be crashed.
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labels:
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severity: critical
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for: 2m
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- alert: Prometheus AlertManager config not synced
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expr: 'count(count_values("config_hash", alertmanager_config_hash)) > 1'
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annotations:
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description: Configurations of AlertManager cluster instances are out of sync
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labels:
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severity: warning
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- alert: Prometheus target scraping slow
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expr: 'prometheus_target_interval_length_seconds{quantile="0.9"} > 60'
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annotations:
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description: Prometheus is scraping exporters slowly
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labels:
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severity: warning
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for: 5m
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- name: Host and hardware
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rules:
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- alert: Host out of memory
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expr: 'node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes * 100 < 10'
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annotations:
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description: Node memory is filling up (< 10% left)
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labels:
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severity: warning
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for: 2m
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- alert: Host out of disk space
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expr: '(node_filesystem_avail_bytes * 100) / node_filesystem_size_bytes < 10 and ON (instance, device, mountpoint) node_filesystem_readonly == 0'
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annotations:
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description: Disk is almost full (< 10% left)
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labels:
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severity: warning
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for: 2m
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- alert: Host high CPU load
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expr: '100 - (avg by(instance) (rate(node_cpu_seconds_total{mode="idle"}[2m])) * 100) > 80'
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annotations:
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description: CPU load is > 80%
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labels:
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severity: warning
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for: 2m
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- alert: Host OOM kill detected
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expr: 'increase(node_vmstat_oom_kill[1m]) > 0'
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annotations:
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description: OOM kill detected
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labels:
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severity: warning
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- alert: Host clock skew
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expr: '(node_timex_offset_seconds > 0.05 and deriv(node_timex_offset_seconds[5m]) >= 0) or (node_timex_offset_seconds < -0.05 and deriv(node_timex_offset_seconds[5m]) <= 0)'
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annotations:
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description: 'Clock skew detected. Clock is out of sync.'
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labels:
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severity: warning
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for: 2m |