How to Collect Memory Disk Usage By Using CloudWatch Agent
This blog provides a quick guide on how to set up CloudWatch Agent manually on EC2 Linux Instance, CloudWatch Agent enables you to collect system or custom metrics from Amazon EC2 instances across operating systems. You can install CloudWatch Agent on AWS Cloud or on-promise server, Linux, or Windows as well.
Install the CloudWatch Agent on Amazon Linux EC2
sudo yum install amazon-cloudwatch-agent
You can import the CloudWatch agent if you have already, that'll be useful if you want to re-use the same CloudWatch agent config over and over again. Following is the step to use the default wizard to create a new config file.
Run the CloudWatch Agent Wizard
Once you run the following command on Linux EC2, you'll get started with the CloudWatch Agent wizard.
CloudWatch Agent Config File Path
After you finish the CloudWatch agent setup wizard, it'll create a JSON config file at the following location.
Install collectd for the CloudWatch Agent
If you wish to use collectd to collect metrics, you should install via the following command.
sudo yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm sudo yum install -y collectd
CloudWatch Agent File
This CloudWatch agent config file, it used to specify proxy and region information.
cd /opt/aws/amazon-cloudwatch-agent/etc nano amazon-cloudwatch-agent.toml
Run the CloudWatch Agent on EC2 Linux
Following is the command to the CloudWatch agent with config file you either create from the wizard or from your previous config file.
sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -a fetch-conf ig -m ec2 -s -c file:/opt/aws/amazon-cloudwatch-agent/bin/config.json
Should work now..?
At this point, if everything works out you should start seeing memory or disk usage, so go to the CloudWatch > Metrics, click the All metrics, click the CWAgent, under CWAgent should contain a list of metrics you set up from the CloudWatch Agent, and data is sending from your EC2.