Given an ECS service with ALB integration, if the ALB health check path is set to "/health" but the container does not expose this path, what will be the expected behavior?

medium📝 service behavior Q4 of 15

AWS - ECS and Fargate

AThe ALB will ignore health checks and route traffic normally.

BThe ALB will mark targets as unhealthy and stop routing traffic to them.

CThe ECS service will automatically fix the health check path.

DThe ALB will route traffic only to tasks with open ports.

Step-by-Step Solution

Solution:

Step 1: Understand ALB health check mechanism
ALB sends requests to the configured health check path to verify target health.
Step 2: Analyze impact of incorrect health check path
If the container does not respond successfully on "/health", ALB marks targets unhealthy and stops sending traffic to them.
Final Answer:
The ALB will mark targets as unhealthy and stop routing traffic to them. -> Option B
Quick Check:
Incorrect health check path = Targets unhealthy [OK]

Quick Trick: Health check path must match container endpoint [OK]

Common Mistakes:

Assuming ALB ignores failed health checks
Expecting ECS to auto-correct health check paths
Believing ALB routes traffic regardless of health

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Given an ECS service with ALB integration, if the ALB health check path is set to "/health" but the container does not expose this path, what will be the expected behavior?

Step 1: Understand ALB health check mechanism

Step 2: Analyze impact of incorrect health check path

Final Answer:

Quick Check:

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