3 Steps to Setup EC2 EBS Volume Disk Space Monitoring using Cloudwatch

The default monitoring of Amazon EC2 does not track the EBS disk space. To monitor disk space in EC2 instance, you need can either manually installed Cloudwatch Agent or can use SSM to install the agent. After installing you

Step 1. Instal cloudwatch agent
sudo yum -y install amazon-cloudwatch-agent

Step 2. create a config.json file  in the following location.

/opt/aws/amazon-cloudwatch-agent/bin/config.json


{
"agent": {
"metrics_collection_interval": 60,
"run_as_user": "root"
},
"metrics": {
"append_dimensions": {
"AutoScalingGroupName": "${aws:AutoScalingGroupName}",
"ImageId": "${aws:ImageId}",
"InstanceId": "${aws:InstanceId}",
"InstanceType": "${aws:InstanceType}"
},
"metrics_collected": {
"disk": {
"measurement": [
"used_percent"
],
"metrics_collection_interval": 60,
"resources": [
"*"
]
},
"mem": {
"measurement": [
"mem_used_percent"
],
"metrics_collection_interval": 60
}
}
}
}

 

3. Run the agent
sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -a fetch-config -m ec2 -s -c file:/opt/aws/amazon-cloudwatch-agent/bin/config.json

4. check the status of the agent.

systemctl status amazon-cloudwatch-agent

 

Troubleshooting

If there is an issue starting the agent, you can have a look at  the Cloudwatch logs at var/log/amazon/amazon-cloudwatch-agent