AWS RDS创建ReadLatency，WriteLatency，DBLoad，AuroraVolumeBytesLeftTotal四种指标告警

ReadLatency：连续3个5分钟读延迟20ms告警

bash 复制代码

# Alert when read latency exceeds 20ms
aws cloudwatch put-metric-alarm \
  --alarm-name "rds-mydb-read-latency-high" \
  --alarm-description "RDS read latency above 20ms" \
  --metric-name ReadLatency \
  --namespace AWS/RDS \
  --statistic Average \
  --period 300 \
  --evaluation-periods 3 \
  --threshold 0.02 \
  --comparison-operator GreaterThanThreshold \
  --dimensions Name=DBInstanceIdentifier,Value=my-database \
  --alarm-actions arn:aws:sns:us-east-1:1242436:rds-critical-alerts

WriteLatency：连续3个5分钟写延迟20ms告警

bash 复制代码

# Alert when write latency exceeds 20ms
aws cloudwatch put-metric-alarm \
  --alarm-name "rds-mydb-write-latency-high" \
  --alarm-description "RDS write latency above 20ms" \
  --metric-name WriteLatency \
  --namespace AWS/RDS \
  --statistic Average \
  --period 300 \
  --evaluation-periods 3 \
  --threshold 0.02 \
  --comparison-operator GreaterThanThreshold \
  --dimensions Name=DBInstanceIdentifier,Value=my-database \
  --alarm-actions arn:aws:sns:us-east-1:1231423523:rds-critical-alerts

DBLoad:连续3个5分钟CPU平均负载超80%告警

bash 复制代码

aws cloudwatch put-metric-alarm \
    --alarm-name "aurora-dbload-writer-high" \
    --alarm-description "DBLoad 超过 1.6 (vCPU 80%)" \
    --metric-name "DBLoad" \
    --namespace "AWS/RDS" \
    --statistic "Average" \
    --period 300 \
    --evaluation-periods 3 \
    --threshold 1.6 \
    --comparison-operator "GreaterThanThreshold" \
    --dimensions Name=DBInstanceIdentifier,Value=你的Writer实例ID

这个1.6是怎么来的。我的AWS数据库实例是db.r5.large类型，这个类型只有2个vCPU，所以2*0.8=1.6，意思CPU平均负载超80%。

AuroraVolumeBytesLeftTotal：剩余磁盘空间不足50GB告警

bash 复制代码

aws cloudwatch put-metric-alarm \
  --alarm-name "Aurora-Storage-Left-Critical-30GB" \
  --alarm-description "Aurora 剩余存储低于 50GB，紧急！" \
  --metric-name AuroraVolumeBytesLeftTotal \
  --namespace AWS/RDS \
  --statistic Average \
  --period 300 \
  --evaluation-periods 3 \
  --threshold 53687091200 \
  --comparison-operator LessThanOrEqualToThreshold \
  --dimensions Name=DBClusterIdentifier,Value=你的集群名 \
  --alarm-actions arn:aws:sns:us-west-2:123456789012:MyAlarmTopic \
  --ok-actions arn:aws:sns:us-west-2:123456789012:MyAlarmTopic \
  --treat-missing-data notBreaching

AWS RDS创建ReadLatency，WriteLatency，DBLoad，AuroraVolumeBytesLeftTotal四种指标告警

ReadLatency：连续3个5分钟读延迟20ms告警

WriteLatency：连续3个5分钟写延迟20ms告警

DBLoad:连续3个5分钟CPU平均负载超80%告警

AuroraVolumeBytesLeftTotal：剩余磁盘空间不足50GB告警

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