AWS-CLOUDWATCH

Steps:

1. Create an AWS EC2 IAM Role and add CloudWatch and SSM Full Access. - Role Name: EC2-CloudWatch-Role.
2. Create a Parameter in Systems Manger with the name "/alarm/AWS-CWAgentLinConfig" and store the value.
3. Create an EC2 Instance, Attach the role created in Step 1 and Add the commands in the Userdata Section.

Commands that needs to be added in Userdata Section:

#!/bin/bash
wget https://s3.amazonaws.com/amazoncloudwatch-agent/linux/amd64/latest/AmazonCloudWatchAgent.zip
unzip AmazonCloudWatchAgent.zip
sudo ./install.sh
sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -a fetch-config -m ec2 -c ssm:/alarm/AWS-CWAgentLinConfig -s

Check if EC2 Instance has CWAgent Installed or not:

sudo /opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -m ec2 -a status

Value for the SSM Parameter (/alarm/AWS-CWAgentLinConfig):

{
    "metrics": {
        "append_dimensions": {
            "InstanceId": "${aws:InstanceId}"
        },
        "metrics_collected": {
            "mem": {
                "measurement": [
                    "mem_used_percent"
                ],
                "metrics_collection_interval": 60
            },
            "disk": {
                "measurement": [
                     "disk_used_percent"
                ],
                "metrics_collection_interval": 60
            }
        }
    }
}

Additional code:

{
  "logs": {
    "logs_collected": {
      "files": {
        "collect_list": [
          {
            "log_group_name": "HttpAccessLog",
            "file_path": "/var/log/httpd/access_log",
            "log_stream_name": "{instance_id}",
            "timestamp_format": "%b %d %H:%M:%S"
          },
          {
            "log_group_name": "HttpErrorLog",
            "file_path": "/var/log/httpd/error_log",
            "log_stream_name": "{instance_id}",
            "timestamp_format": "%b %d %H:%M:%S"
          }
        ]
      }
    }
  },
  "metrics": {
    "metrics_collected": {
      "cpu": {
        "measurement": [
          "cpu_usage_idle",
          "cpu_usage_iowait",
          "cpu_usage_user",
          "cpu_usage_system"
        ],
        "metrics_collection_interval": 10,
        "totalcpu": false
      },
      "disk": {
        "measurement": [
          "used_percent",
          "inodes_free"
        ],
        "metrics_collection_interval": 10,
        "resources": [
          "*"
        ]
      },
      "diskio": {
        "measurement": [
          "io_time"
        ],
        "metrics_collection_interval": 10,
        "resources": [
          "*"
        ]
      },
      "mem": {
        "measurement": [
          "mem_used_percent"
        ],
        "metrics_collection_interval": 10
      },
      "swap": {
        "measurement": [
          "swap_used_percent"
        ],
        "metrics_collection_interval": 10
      }
    }
  }
}