You deployed a container to Cloud Run but it fails to start. The error says the container does not listen on the expected port. What is the likely cause?

medium📝 Debug Q14 of 15

GCP - Cloud Run

ACloud Run requires containers to listen on the port defined by the PORT environment variable.

BCloud Run only supports containers that listen on port 80 hardcoded.

CCloud Run does not allow containers to listen on any port.

DCloud Run automatically assigns a random port and no configuration is needed.

Step-by-Step Solution

Solution:

Step 1: Identify Cloud Run port requirement
Cloud Run expects containers to listen on the port specified by the PORT environment variable it sets.
Step 2: Understand common error cause
If the container listens on a different port, Cloud Run cannot route traffic correctly, causing startup failure.
Final Answer:
Cloud Run requires containers to listen on the port defined by the PORT environment variable. -> Option A
Quick Check:
Listen on PORT env variable = B [OK]

Quick Trick: Containers must listen on PORT env variable in Cloud Run [OK]

Common Mistakes:

Assuming port 80 is always used
Thinking Cloud Run forbids listening on ports
Believing no port configuration is needed

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More GCP Quizzes

You deployed a container to Cloud Run but it fails to start. The error says the container does not listen on the expected port. What is the likely cause?

Step 1: Identify Cloud Run port requirement

Step 2: Understand common error cause

Final Answer:

Quick Check:

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