cw agent prerequisite

We must install cloudwatch agent on all instances through CLI
the instance should have a role to push metrics/logs to cloudwatch
CloudWatchAgentServerPolicy or “

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "cloudwatch:PutMetricData",
        "logs:PutLogEvents",
        "logs:CreateLogGroup",
        "logs:CreateLogStream"
      ],
      "Resource": "*"
    }
  ]
}