[Solved] You have this ECS task definition snippet:{ "containerDefinitions": [{ "name": "app", "image": "myapp:latest", "cpu": 512, "memory":... | AWS

AWS - ECS and Fargate

You have this ECS task definition snippet:

{
  "containerDefinitions": [{
    "name": "app",
    "image": "myapp:latest",
    "cpu": 512,
    "memory": 1024
  }]
}

When you try to run this task, it fails with an error about missing port mappings. What is the likely fix?

AAdd a portMappings section specifying containerPort and hostPort

BRemove the cpu and memory fields

CChange the image name to include a registry URL

DRename the container from 'app' to 'web'

Step-by-Step Solution

Solution:

Step 1: Understand the error about missing port mappings
If the app requires network access, port mappings must be defined to expose ports.
Step 2: Identify the fix
Adding a portMappings section with containerPort and hostPort will resolve the error by exposing the needed ports.
Final Answer:
Add a portMappings section specifying containerPort and hostPort -> Option A
Quick Check:
Missing ports error = add portMappings [OK]

Quick Trick: Add portMappings to expose container ports when needed [OK]

Common Mistakes:

Master "ECS and Fargate" in AWS

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You have this ECS task definition snippet: