{
  "schemaVersion": "2.2",
  "description": "Check and update Apache to latest version",
  "mainSteps": [
    {
      "action": "aws:runShellScript",
      "name": "checkAndUpdateApache",
      "inputs": {
        "runCommand": [
          "#!/bin/bash",
          "CURRENT_VERSION=$(httpd -v | grep -oP 'Apache/\\\\K[0-9.]+')",
          "yum check-update httpd -q | grep -q httpd",
          "if [ $? -eq 0 ]; then",
          "  yum update httpd -y",
          "  systemctl restart httpd",
          "fi"
        ]
      }
    }
  ]
}

aws ssm create-document \\
  --name "UpdateApache" \\
  --content file://update-apache.json \\
  --document-type "Command"

aws ssm delete-document --name UpdateApache --region ap-northeast-2