Implementation

• Confirm Container Insights is Enabled

  1. If for any reason, you missed enabling Container Insights in Module 4, you can enable it via AWS CLI on existing Amazon ECS clusters using the command below:
  

  aws ecs update-cluster-settings --cluster Graviton2ECSCluster --settings name=containerInsights,value=enabled --region ${AWS_REGION}

  Code snippet copied

  Copy

  2. From the response of the command, confirm that the settings has a setting with name "containerInsights" and value "enabled".
  

  

• Visualizing Container Insights in CloudWatch

  1. Navigate to the Amazon CloudWatch Console by typing “CloudWatch” in the search box, and selecting the service name as shown below:

  

  2. The CloudWatch console is displayed as below. Ensure the “New menu experience” is selected in the top left corner of the screen, to be able to use the new CloudWatch console. On the menu on the left, click on “Container Insights” under the “Insights” section.
  

  

  3. The Container Insights dashboard is displayed as below. Ensure the “List View” is selected in the top right corner to show the list of the container resources. You can see the “Graviton2ECSCluster”, “Graviton2ECSService”, and “Graviton2ECSTask” which are the resources created so far.
  

  

  4. Container Insights provides metrics for each of these resources to help provide visibility on what is going on within the resources. Click on each of the resources to see the metrics as show below.

  Cluster metrics - this provides a view of the CPU Utilization, Memory Utilization and Network Transferred and Received. It also provides a view of the count of Container Instance, Task and Service within the cluster.
  

  

  Service metrics - provides a view of the aggregated metrics of the tasks running within the service and also the performance for each of the tasks.
  

  Task metrics - provides a view of the metrics for each task running in the cluster.
  

  

• Analyzing Application Logs via CloudWatch

  While creating the Task Definition as shown in Module 4, you enabled Log Configuration and specified a name for the log group. This will enable the application logs that were previously sent out to standard output to be sent to Amazon CloudWatch Logs. In this step, you will see how to review the application logs sent to CloudWatch.

  1. Navigate to the CloudWatch Console and click on Log Group under Logs in the left menu.

  

  2. The Log Group that was configured in Module 4 while creating the task definition is “/ecs/Graviton2ECSTask“. Select this log group to show the log streams from the containers in the ECS task. Sending logs to Cloudwatch logs enables you to view different logs from your containers in one convenient location, and it prevents your container logs from taking up disk space on your container instances. 
  

  

  3. Select a log stream to display the application logs. In the top right corner of the screen you can specify filters based on date and time to retrieve the logs.