85d4857d1b
- 加入 redis_memory_max_bytes > 0 前置條件 - 防止 Redis 未設 maxmemory 時除以零產生 +Inf 永遠觸發 - 影響: alerts-unified.yml + database-alerts.yaml Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
265 lines
9.9 KiB
YAML
265 lines
9.9 KiB
YAML
# =============================================================================
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# AWOOOI Database Alerts
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# =============================================================================
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# 負責人: DevOps Commander
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# 版本: v1.0
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# 日期: 2026-03-29
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# ADR: ADR-037 Phase B (Database Exporters)
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#
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# 告警目標: PostgreSQL (192.168.0.188:5432) + Redis (192.168.0.188:6380)
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# =============================================================================
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apiVersion: monitoring.coreos.com/v1
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kind: PrometheusRule
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metadata:
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name: database-alerts
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namespace: monitoring
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labels:
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release: prometheus
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app: prometheus
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spec:
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groups:
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# =========================================================================
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# PostgreSQL 告警
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# =========================================================================
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- name: postgresql
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rules:
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# -----------------------------------------------------------------
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# 連接池即將耗盡 (> 80%)
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# -----------------------------------------------------------------
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- alert: PostgreSQLConnectionPoolNearLimit
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expr: |
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sum(pg_stat_activity_count{state="active"}) by (datname) > 80
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for: 5m
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labels:
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severity: warning
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service: postgres
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team: infra
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annotations:
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summary: "PostgreSQL 活躍連接數過高"
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description: "Database {{ $labels.datname }} 活躍連接: {{ $value }}"
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runbook_url: "https://awoooi.internal/runbooks/postgres-connections"
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# -----------------------------------------------------------------
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# 連接池耗盡 (> 95%)
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# -----------------------------------------------------------------
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- alert: PostgreSQLConnectionPoolExhausted
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expr: |
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sum(pg_stat_activity_count{state="active"}) by (datname) > 95
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for: 2m
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labels:
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severity: critical
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service: postgres
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team: infra
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annotations:
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summary: "PostgreSQL 連接池即將耗盡"
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description: "Database {{ $labels.datname }} 活躍連接 > 95"
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# -----------------------------------------------------------------
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# 慢查詢過多
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# -----------------------------------------------------------------
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- alert: PostgreSQLSlowQueries
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expr: pg_slow_queries > 5
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for: 5m
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labels:
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severity: warning
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service: postgres
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team: backend
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annotations:
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summary: "PostgreSQL 慢查詢數量過多"
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description: "User {{ $labels.usename }} 有 {{ $value }} 個慢查詢 (> 1s)"
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# -----------------------------------------------------------------
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# 鎖等待過多
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# -----------------------------------------------------------------
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- alert: PostgreSQLLockWaiting
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expr: sum(pg_locks_waiting) > 10
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for: 2m
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labels:
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severity: warning
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service: postgres
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team: backend
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annotations:
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summary: "PostgreSQL 鎖等待過多"
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description: "{{ $value }} 個查詢正在等待鎖"
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# -----------------------------------------------------------------
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# 表膨脹 (Dead Tuple > 20%)
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# -----------------------------------------------------------------
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- alert: PostgreSQLTableBloat
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expr: pg_stat_user_tables_bloat_dead_tuple_ratio > 20
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for: 30m
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labels:
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severity: warning
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service: postgres
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team: infra
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annotations:
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summary: "PostgreSQL 表膨脹嚴重"
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description: "Table {{ $labels.relname }} dead tuple 比例: {{ $value }}%"
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# -----------------------------------------------------------------
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# 資料庫不可達
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# -----------------------------------------------------------------
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- alert: PostgreSQLDown
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expr: pg_up == 0
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for: 1m
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labels:
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severity: critical
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service: postgres
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team: infra
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annotations:
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summary: "PostgreSQL 無法連線"
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description: "PostgreSQL Exporter 無法連接到資料庫"
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# -----------------------------------------------------------------
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# 長時間執行查詢 (> 60s)
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# -----------------------------------------------------------------
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- alert: PostgreSQLLongRunningQuery
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expr: pg_longest_query_seconds > 60
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for: 1m
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labels:
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severity: warning
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service: postgres
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team: backend
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annotations:
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summary: "PostgreSQL 長時間執行查詢"
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description: "User {{ $labels.usename }} 查詢已執行 {{ $value | humanizeDuration }}"
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# -----------------------------------------------------------------
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# 高 Rollback 率 (> 5%)
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# -----------------------------------------------------------------
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- alert: PostgreSQLHighRollbackRate
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expr: pg_stat_database_transactions_rollback_ratio > 5
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for: 15m
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labels:
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severity: warning
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service: postgres
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team: backend
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annotations:
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summary: "PostgreSQL 事務回滾率過高"
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description: "Database {{ $labels.datname }} 回滾率: {{ $value }}%"
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# =========================================================================
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# Redis 告警
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# =========================================================================
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- name: redis
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rules:
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# -----------------------------------------------------------------
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# 記憶體使用過高 (> 85%)
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# -----------------------------------------------------------------
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- alert: RedisMemoryHigh
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expr: |
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redis_memory_max_bytes > 0 and redis_memory_used_bytes / redis_memory_max_bytes > 0.85
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for: 5m
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labels:
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severity: warning
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service: redis
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team: infra
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annotations:
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summary: "Redis 記憶體使用 > 85%"
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description: "Redis 記憶體使用: {{ $value | humanizePercentage }}"
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# -----------------------------------------------------------------
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# 記憶體即將耗盡 (> 95%)
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# -----------------------------------------------------------------
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- alert: RedisMemoryCritical
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expr: |
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redis_memory_used_bytes / redis_memory_max_bytes > 0.95
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for: 2m
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labels:
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severity: critical
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service: redis
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team: infra
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annotations:
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summary: "Redis 記憶體即將耗盡"
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description: "Redis 記憶體使用 > 95%"
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# -----------------------------------------------------------------
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# 快取命中率過低 (< 80%)
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# -----------------------------------------------------------------
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- alert: RedisCacheHitRateLow
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expr: |
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rate(redis_keyspace_hits_total[5m])
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/
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(rate(redis_keyspace_hits_total[5m]) + rate(redis_keyspace_misses_total[5m]))
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< 0.8
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for: 15m
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labels:
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severity: warning
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service: redis
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team: backend
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annotations:
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summary: "Redis 快取命中率過低"
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description: "命中率: {{ $value | humanizePercentage }}"
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# -----------------------------------------------------------------
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# 連接數過高
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# -----------------------------------------------------------------
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- alert: RedisConnectionsHigh
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expr: redis_connected_clients > 500
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for: 5m
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labels:
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severity: warning
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service: redis
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team: infra
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annotations:
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summary: "Redis 連接數過高"
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description: "連接數: {{ $value }}"
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# -----------------------------------------------------------------
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# Key 驅逐頻繁
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# -----------------------------------------------------------------
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- alert: RedisEvictedKeys
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expr: rate(redis_evicted_keys_total[5m]) > 100
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for: 5m
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labels:
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severity: warning
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service: redis
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team: backend
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annotations:
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summary: "Redis Key 驅逐頻繁"
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description: "每秒驅逐 {{ $value }} 個 key"
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# -----------------------------------------------------------------
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# Redis 不可達
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# -----------------------------------------------------------------
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- alert: RedisDown
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expr: redis_up == 0
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for: 1m
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labels:
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severity: critical
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service: redis
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team: infra
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annotations:
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summary: "Redis 無法連線"
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description: "Redis Exporter 無法連接到 Redis"
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# -----------------------------------------------------------------
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# 命令延遲過高
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# -----------------------------------------------------------------
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- alert: RedisLatencyHigh
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expr: |
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redis_commands_duration_seconds_total / redis_commands_processed_total > 0.01
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for: 5m
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labels:
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severity: warning
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service: redis
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team: backend
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annotations:
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summary: "Redis 命令延遲過高"
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description: "平均命令延遲 > 10ms"
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# -----------------------------------------------------------------
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# 阻塞客戶端
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# -----------------------------------------------------------------
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- alert: RedisBlockedClients
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expr: redis_blocked_clients > 10
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for: 5m
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labels:
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severity: warning
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service: redis
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team: backend
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annotations:
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summary: "Redis 有阻塞的客戶端"
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description: "{{ $value }} 個客戶端被阻塞 (BLPOP/BRPOP)"
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