{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Parameters": {
    "ClusterName": {
      "Type": "String",
      "Description": "Enter the name of your ECS cluster from which you want to collect metrics"
    },
    "CreateIAMRoles": {
      "Type": "String",
      "Default": "False",
      "AllowedValues": [
        "True",
        "False"
      ],
      "Description": "Whether to create default IAM roles",
      "ConstraintDescription": "must specify True or False."
    },
    "TaskRoleArn": {
      "Type": "String",
      "Default": "Default",
      "Description": "Enter the role arn you want to use as the ecs task role"
    },
    "ExecutionRoleArn": {
      "Type": "String",
      "Default": "Default",
      "Description": "Enter the role arn you want to use as the ecs execution role"
    }
  },
  "Conditions": {
    "CreateRoles": {
      "Fn::Equals": [
        {
          "Ref": "CreateIAMRoles"
        },
        "True"
      ]
    },
    "DefaultTaskRole": {
      "Fn::Equals": [
        {
          "Ref": "TaskRoleArn"
        },
        "Default"
      ]
    },
    "DefaultExecutionRole": {
      "Fn::Equals": [
        {
          "Ref": "ExecutionRoleArn"
        },
        "Default"
      ]
    }
  },
  "Resources": {
    "ECSTaskDefinition": {
      "Type": "AWS::ECS::TaskDefinition",
      "Properties": {
        "Family": "ecs-cwagent-daemon-service",
        "TaskRoleArn": {
          "Fn::If": [
            "CreateRoles",
            {
              "Fn::GetAtt": [
                "ECSTaskRole",
                "Arn"
              ]
            },
            {
              "Fn::If": [
                "DefaultTaskRole",
                {
                  "Fn::Sub": "arn:aws:iam::${AWS::AccountId}:role/CWAgentECSTaskRole"
                },
                {
                  "Ref": "TaskRoleArn"
                }
              ]
            }
          ]
        },
        "ExecutionRoleArn": {
          "Fn::If": [
            "CreateRoles",
            {
              "Fn::GetAtt": [
                "ECSExecutionRole",
                "Arn"
              ]
            },
            {
              "Fn::If": [
                "DefaultExecutionRole",
                {
                  "Fn::Sub": "arn:aws:iam::${AWS::AccountId}:role/CWAgentECSExecutionRole"
                },
                {
                  "Ref": "ExecutionRoleArn"
                }
              ]
            }
          ]
        },
        "NetworkMode": "bridge",
        "ContainerDefinitions": [
          {
            "Name": "cloudwatch-agent",
            "Image": "public.ecr.aws/cloudwatch-agent/cloudwatch-agent:1.300048.1b904",
            "MountPoints": [
              {
                "ReadOnly": true,
                "ContainerPath": "/rootfs/proc",
                "SourceVolume": "proc"
              },
              {
                "ReadOnly": true,
                "ContainerPath": "/rootfs/dev",
                "SourceVolume": "dev"
              },
              {
                "ReadOnly": true,
                "ContainerPath": "/sys/fs/cgroup",
                "SourceVolume": "al2_cgroup"
              },
              {
                "ReadOnly": true,
                "ContainerPath": "/cgroup",
                "SourceVolume": "al1_cgroup"
              },
              {
                "ReadOnly": true,
                "ContainerPath": "/rootfs/sys/fs/cgroup",
                "SourceVolume": "al2_cgroup"
              },
              {
                "ReadOnly": true,
                "ContainerPath": "/rootfs/cgroup",
                "SourceVolume": "al1_cgroup"
              }
            ],
            "Environment": [
              {
                "Name": "USE_DEFAULT_CONFIG",
                "Value": "True"
              }
            ],
            "LogConfiguration": {
              "LogDriver": "awslogs",
              "Options": {
                "awslogs-create-group": "True",
                "awslogs-group": "/ecs/ecs-cwagent-daemon-service",
                "awslogs-region": {
                  "Ref": "AWS::Region"
                },
                "awslogs-stream-prefix": "ecs"
              }
            }
          }
        ],
        "RequiresCompatibilities": [
          "EC2"
        ],
        "Volumes": [
          {
            "Name": "proc",
            "Host": {
              "SourcePath": "/proc"
            }
          },
          {
            "Name": "dev",
            "Host": {
              "SourcePath": "/dev"
            }
          },
          {
            "Name": "al1_cgroup",
            "Host": {
              "SourcePath": "/cgroup"
            }
          },
          {
            "Name": "al2_cgroup",
            "Host": {
              "SourcePath": "/sys/fs/cgroup"
            }
          }
        ],
        "Cpu": "128",
        "Memory": "64"
      }
    },
    "ECSDaemonService": {
      "Type": "AWS::ECS::Service",
      "Properties": {
        "TaskDefinition": {
          "Ref": "ECSTaskDefinition"
        },
        "Cluster": {
          "Ref": "ClusterName"
        },
        "LaunchType": "EC2",
        "SchedulingStrategy": "DAEMON",
        "ServiceName": "cwagent-daemon-service"
      }
    },
    "ECSTaskRole": {
      "Type": "AWS::IAM::Role",
      "Condition": "CreateRoles",
      "Properties": {
        "Description": "Allows ECS tasks to call AWS services on your behalf.",
        "AssumeRolePolicyDocument": {
          "Version": "2012-10-17",
          "Statement": [
            {
              "Sid": "",
              "Effect": "Allow",
              "Principal": {
                "Service": "ecs-tasks.amazonaws.com"
              },
              "Action": "sts:AssumeRole"
            }
          ]
        },
        "ManagedPolicyArns": [
          "arn:aws:iam::aws:policy/CloudWatchAgentServerPolicy"
        ],
        "RoleName": "CWAgentECSTaskRole"
      }
    },
    "ECSExecutionRole": {
      "Type": "AWS::IAM::Role",
      "Condition": "CreateRoles",
      "Properties": {
        "Description": "Allows ECS container agent makes calls to the Amazon ECS API on your behalf.",
        "AssumeRolePolicyDocument": {
          "Version": "2012-10-17",
          "Statement": [
            {
              "Sid": "",
              "Effect": "Allow",
              "Principal": {
                "Service": "ecs-tasks.amazonaws.com"
              },
              "Action": "sts:AssumeRole"
            }
          ]
        },
        "ManagedPolicyArns": [
          "arn:aws:iam::aws:policy/CloudWatchAgentServerPolicy",
          "arn:aws:iam::aws:policy/service-role/AmazonECSTaskExecutionRolePolicy"
        ],
        "RoleName": "CWAgentECSExecutionRole"
      }
    }
  }
}