title: "Network bindings - not configured" when running service with AWS Fargate
body: <p>I'm trying to set up a couple of services with ECS Fargate, provisioned via Terraform. They use the same module, only image, ALB target group, environment variables and port mappings differ.</p>
  
  <p>2 out 3 services start their tasks successfully only one (unfortunately the main service), doesn't want to start and shows <code>Network bindings - not configured</code> for the container. The port I'm using is 80.</p>
  
  <p>The task definition has the correct port mappings.</p>
  
  <p>I've tried changing the port (to 8080), use multiple port mappings and recreating the service multiple times to no effect.</p>
  
  <p>Of course the task gets killed by the load balancer for failing health checks.</p>
  
  <p>Any pointers what could be wrong? I found some Github issues regarding this from 2017, but on EC2-backed ECS instances, which has been claimed to be fixed.</p>
  
  <p><em>For reference, here's the task definition JSON:</em></p>
  
  <pre><code>{
    "ipcMode": null,
    "executionRoleArn": "ROLE_ARN",
    "containerDefinitions": [
      {
        "dnsSearchDomains": null,
        "logConfiguration": {
          "logDriver": "awslogs",
          "secretOptions": null,
          "options": {
            "awslogs-group": "/drone",
            "awslogs-region": "eu-central-1",
            "awslogs-stream-prefix": "drone-server/"
          }
        },
        "entryPoint": null,
        "portMappings": [
          {
            "hostPort": 80,
            "protocol": "tcp",
            "containerPort": 80
          }
        ],
        "command": null,
        "linuxParameters": null,
        "cpu": 256,
        "environment": [...],
        "resourceRequirements": null,
        "ulimits": null,
        "dnsServers": null,
        "mountPoints": [],
        "workingDirectory": null,
        "secrets": [...],
        "dockerSecurityOptions": null,
        "memory": 512,
        "memoryReservation": 512,
        "volumesFrom": [],
        "stopTimeout": 30,
        "image": "drone/drone:1",
        "startTimeout": null,
        "dependsOn": null,
        "disableNetworking": null,
        "interactive": null,
        "healthCheck": null,
        "essential": true,
        "links": null,
        "hostname": null,
        "extraHosts": null,
        "pseudoTerminal": null,
        "user": null,
        "readonlyRootFilesystem": false,
        "dockerLabels": null,
        "systemControls": null,
        "privileged": null,
        "name": "drone-server"
      }
    ],
    "placementConstraints": [],
    "memory": "512",
    "taskRoleArn": "ROLE_ARN",
    "compatibilities": [
      "EC2",
      "FARGATE"
    ],
    "taskDefinitionArn": "TASK_DEFINITION_ARN",
    "family": "drone-server",
    "requiresAttributes": [
      {
        "targetId": null,
        "targetType": null,
        "value": null,
        "name": "com.amazonaws.ecs.capability.logging-driver.awslogs"
      },
      {
        "targetId": null,
        "targetType": null,
        "value": null,
        "name": "ecs.capability.execution-role-awslogs"
      },
      {
        "targetId": null,
        "targetType": null,
        "value": null,
        "name": "com.amazonaws.ecs.capability.docker-remote-api.1.19"
      },
      {
        "targetId": null,
        "targetType": null,
        "value": null,
        "name": "com.amazonaws.ecs.capability.docker-remote-api.1.21"
      },
      {
        "targetId": null,
        "targetType": null,
        "value": null,
        "name": "com.amazonaws.ecs.capability.task-iam-role"
      },
      {
        "targetId": null,
        "targetType": null,
        "value": null,
        "name": "ecs.capability.container-ordering"
      },
      {
        "targetId": null,
        "targetType": null,
        "value": null,
        "name": "ecs.capability.secrets.ssm.environment-variables"
      },
      {
        "targetId": null,
        "targetType": null,
        "value": null,
        "name": "com.amazonaws.ecs.capability.docker-remote-api.1.18"
      },
      {
        "targetId": null,
        "targetType": null,
        "value": null,
        "name": "ecs.capability.task-eni"
      }
    ],
    "pidMode": null,
    "requiresCompatibilities": [
      "FARGATE"
    ],
    "networkMode": "awsvpc",
    "cpu": "256",
    "revision": 14,
    "status": "ACTIVE",
    "proxyConfiguration": null,
    "volumes": []
  }```
  </code></pre>