AWS::ECS::TaskDefinition

• Describes the container and volume definitions

Properties

• https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ecs-taskdefinition.html

Type: AWS::ECS::TaskDefinition
Properties:
  ContainerDefinitions:
    - ContainerDefinition
  Cpu: String
  EphemeralStorage:
    EphemeralStorage
  ExecutionRoleArn: String
  Family: String
  InferenceAccelerators:
    - InferenceAccelerator
  IpcMode: String
  Memory: String
  NetworkMode: String
  PidMode: String
  PlacementConstraints:
    - TaskDefinitionPlacementConstraint
  ProxyConfiguration:
    ProxyConfiguration
  RequiresCompatibilities:
    - String
  RuntimePlatform:
    RuntimePlatform
  Tags:
    - Tag
  TaskRoleArn: String
  Volumes:
    - Volume

ContainerDefinitions

{
  "AWSEBDockerrunVersion": 2,
  "containerDefinitions": [
    {
      "name": "client",
      "image": "hvitoi/multi-client",
      "hostname": "client",
      "essential": false,
      "memory": 128
    },
    {
      "name": "server",
      "image": "hvitoi/multi-server",
      "hostname": "api",
      "essential": false,
      "memory": 128
    },
    {
      "name": "worker",
      "image": "hvitoi/multi-worker",
      "hostname": "worker",
      "essential": false,
      "memory": 128
    },
    {
      "name": "nginx",
      "image": "hvitoi/multi-nginx",
      "hostname": "nginx",
      "essential": true,
      "portMappings": [{ "hostPort": 80, "containerPort": 80 }],
      "links": ["client", "server"],
      "memory": 128
    }
  ]
}

TaskRoleArn

• EC2 Instance Profile are attached to the agent in order to:

• Call the ECS Service API

• Pull images from ECR Service

• Send logs to CloudWatch

• ECS Task Role are attached to the task

• Allow each task to have a specific role
• Task roles are defined in a task definition

Volumes

• ECS has integration with EFS
• Multi-AZ shared storage
• The volumes are directly mounted into the container