Go to the AWS Systems Manager Parameter Store **page to create a parameter and click the Create parameter button.
Set AmazonCloudWatch-linux as name, select level Default and type as String.
Enter the JSON content described below under Value. Finally, click on Create parameter.
{
"metrics":{
"append_dimensions":{
"AutoScalingGroupName":"${aws:AutoScalingGroupName}",
"ImageId":"${aws:ImageId}",
"InstanceId":"${aws:InstanceId}",
"InstanceType":"${aws:InstanceType}"
},
"metrics_collected":{
"disk":{
"measurement":[
"disk_total",
"disk_used"
],
"metrics_collection_interval":300,
"ignore_file_system_types":[
"tmpfs",
"devtmpfs",
"rootfs",
"sysfs"
],
"resources":[
"*"
]
},
"mem":{
"measurement":[
"mem_total",
"mem_used"
],
"metrics_collection_interval":300
},
"swap":{
"measurement":[
"swap_used",
"swap_used_percent"
],
"metrics_collection_interval":300
}
}
}
}
Once it is created, the parameter will appear on the My parameters screen.
In order for CWAgent to send data to CloudWatch, you must create a role and include two permissions: AmazonEC2RoleforSSM and CloudWatchAgentServerPolicy, through AWS Managed policies in the IAM Role for EC2 instances. This IAM role must be attached to EC2 instances. If you already have an IAM role in use for EC2, you only need to add the AmazonEC2RoleforSSM and CloudWatchAgentServerPolicy permissions. Go to the Roles page to proceed with the tutorial:
On the Create role screen, select AWS Service and EC2 as Use case. Then click Next.
Select the AmazonEC2RoleforSSM policy and click Next.
On the Review screen, verify that the correct policies are being applied and click Create role.
You must install CWAgent on all the machines that you want to collect the metrics from. For this, it is possible to carry out the process using the individual access of each of the machines or automate this step by installing the bash script in the DevOps routine.
Follow the script below to perform the installation:
#!/bin/bash
cd /home/ubuntu
wgethttps://s3.amazonaws.com/ec2-downloads-windows/SSMAgent/latest/debian_amd64/amazon-ssm-agent.deb
sudo dpkg -i amazon-ssm-agent.deb
sudo rm -rf amazon-ssm-agent.deb
mkdir cwAgentPackage
cd cwAgentPackage
wgethttps://s3.amazonaws.com/amazoncloudwatch-agent/linux/amd64/latest/AmazonCloudWatchAgent.zip
sudo apt-get install -y --force-yes unzip
unzip AmazonCloudWatchAgent.zip
sudo chmod +x install.sh
sudo ./install.sh
cd ..
sudo rm -rf cwAgentPackage
## JSON file stored via ParameterStore called AmazonCloudWatch-linux
sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -a fetch-config -m ec2 -c ssm:AmazonCloudWatch-linux -s
sudo service amazon-ssm-agent restart