What are the supported metrics for EC2 Instance using CloudWatch agent in Applications Manager?

1. Windows
   

1. LogicalDisk
   
1. % Free Space
   
2. Free Megabytes
   
2. Memory
   
1. % Committed Bytes In Use
   
2. Available MBytes
   
3. Committed Bytes
   

Use the below JSON while configuring the CloudWatch agent for Windows:

{ "metrics": { "append_dimensions": { "InstanceId": "${aws:InstanceId}" }, "metrics_collected": { "LogicalDisk": { "measurement": [ "% Free Space", "Free Megabytes" ], "metrics_collection_interval": 300, "resources": [ "*" ] }, "Memory": { "measurement": [ "% Committed Bytes In Use", "Available MBytes", "Committed Bytes" ], "metrics_collection_interval": 300 } } } }

1. Linux
   

1. Memory
   
1. mem_total
   
2. mem_used
   
2. Disk
   
1. disk_total
   
2. disk_used
   
3. Swap
   
1. swap_used_percent
   

Use the below JSON while configuring the CloudWatch agent for Linux:

{ "metrics": { "append_dimensions": { "InstanceId": "${aws:InstanceId}" }, "metrics_collected": { "mem": { "measurement": [ "mem_total", "mem_used" ], "metrics_collection_interval": 300 }, "disk": { "resources": [ "/", "/run" ], "measurement": [ "disk_total", "disk_used" ], "metrics_collection_interval": 300 }, "swap": { "measurement": [ "swap_used_percent" ], "metrics_collection_interval": 300 } } } }

Use the JSON provided in the prerequisites to configure the CloudWatch agent. Only if all the metrics given in prerequisites are present in the CloudWatch, Applications Manager will proceed for the data collection of the OS metrics.

How to verify if the CloudWatchAgentServerRole is attached to the EC2 instance?

1. Go to AWS console > EC2 > Instances > choose the instance.
   
2. In the EC2 instance page, click Actions in the top right > Security > Modify IAM role.
   
3. Verify whether the CloudWatchAgentServerRole is attached as mentioned in the pre-requisites step 1 & 2.
   

This is mandatory to allow the CloudWatch agent to send the collected data to CloudWatch.

No data for OS metrics in EC2 instance monitor in Applications Manager

1. Verify if the JSON used to configure the CloudWatch agent is same as given in pre-requisites.
   
1. 

   Before Applications Manager version v16320, the dimension should be only 'InstanceId'; otherwise, the data will not be populated. Ensure that the configuration matches the given JSON. However, starting from Applications Manager v16320, we have removed this limitation and now support multiple dimensions.
2. Ensure all the metrics mentioned in the supported metrics section is present in the namespace.
3. Verify if the CWAgent namespace is present in the CloudWatch console.
   
1. To verify, navigate to AWS console > Choose region of the EC2 Instance > CloudWatch console > Metrics > All metrics.