Monitoring and Validation Setup

Content:

Setup CloudWatch Dashboard

Access CloudWatch Console

  1. In AWS Console, search for CloudWatch.
  2. Click Dashboards.

Create a Custom Dashboard

  1. Click Create dashboard.
  2. Dashboard name: Migration-Monitoring.
  3. Click Create dashboard.

Monitor Task Status

Add DMS Metrics

  1. Click Add widget.

  2. Select Line chart.

  3. Click Configure.

  4. Metrics configuration:

    • Namespace: AWS/DMS
    • Metric name: CDCLatencySource
    • ReplicationInstanceIdentifier: migration-replication-instance

    Monitor Task Status

  5. Click Create widget.

Add additional widgets:

  • CDCLatencyTarget
  • FullLoadThroughputRowsSource
  • FullLoadThroughputRowsTarget

Add RDS Metrics

  • Create a new widget.
  • Namespace: AWS/RDS
  • Metrics:
    • CPUUtilization for both databases
    • DatabaseConnections
    • ReadLatency, WriteLatency

Click Save dashboard.

Monitor Task Status

Setup CloudWatch Alarms

Create DMS Replication Lag Alarm

  1. Go to Alarms → All alarms.

  2. Click Create alarm. Monitor Task Status

  3. Click Select metric.

  4. Metric selection:

    • AWS/DMS > ReplicationInstanceIdentifier
    • Select CDCLatencySource
    • ReplicationInstanceIdentifier: migration-replication-instance

    Monitor Task Status Monitor Task Status Monitor Task Status

Conditions:

  • Threshold type: Static
  • Whenever CDCLatencySource is: Greater than 300 (5 minutes) Monitor Task Status Actions:
  • Alarm state trigger: In alarm
  • Send notification to: Create new topic
  • Topic name: migration-alerts
  • Email endpoint: your-email@domain.com Monitor Task Status Alarm name: DMS-High-Replication-Lag
    Monitor Task Status Click Create alarm. Monitor Task Status

Create RDS CPU Alarm

  • Create a new alarm for RDS CPU > 80%.
  • Metric: AWS/RDS > CPUUtilization
  • DBInstanceIdentifier: source-mysql-db
  • Threshold: 80%
  • Action: Use the same SNS topic migration-alerts.