Help Needed: Cloud Run Deployment Issue - Container Failed to Listen on Port 8080

[Muskula_Rahul]

Hello , community.

I am encountering an issue while deploying my containerized application on Google Cloud Run. The Docker image builds successfully, but when I try to run it, I receive an error indicating that the container failed to listen on port 8080. Below are the details of my setup, the error message, and the Dockerfile used:

Error Message - "Ready condition status changed to False for Service blog-service with message: Revision 'blog-service-00001-khj' is not ready and cannot serve traffic. The user-provided container failed to start and listen on the port defined provided by the PORT=8080 environment variable. Logs for this revision might contain more information.
"

Here's My Dockerfile

# Use an official Node.js runtime as a parent image
FROM node:18-alpine

# Set the working directory in the container
WORKDIR /app

# Install pnpm globally and clean npm cache to reduce image size
RUN npm install -g pnpm && npm cache clean --force

# Copy package.json and pnpm-lock.yaml (if available)
COPY package.json pnpm-lock.yaml ./

# Install dependencies
RUN pnpm install

# Copy the rest of the application code
COPY . .

# Build the application
RUN pnpm run build

# Expose the port the app runs on (default for Cloud Run is 8080)
EXPOSE 8080

# Define the command to run the application
CMD ["pnpm", "run", "preview", "--", "--host", "0.0.0.0", "--port", "8080"]

Any Help Would Be Much Appreciated.
Thanks In Advance.

[apeltop · Accepted solution]

First of all, the error message ‘Revision ‘blog-service-00001-khj’ is not ready and cannot serve traffic’ means that the server is not responding. Generally, this indicates that the server is in a state where it cannot properly receive requests.

My guess is that port 8080 might not have been opened correctly.

Try this.

CMD ["pnpm", "run", "preview", "--host", "0.0.0.0", "--port", "8080"]

instead of

CMD ["pnpm", "run", "preview", "--", "--host", "0.0.0.0", "--port", "8080"]

[Muskula_Rahul]

Thanks @apeltop 

[SankariJay]

I am trying to pull a public docker image and it is giving me same port 8080 error. The command you gave above right, I tried that in cloud shell but it is giving me this error: -bash: [pnpm,: command not found. Can you kindly help me on it please.

[apeltop]

Hi SankariJay 

First of all, I don't know what exactly you want. So let me answer the error you mentioned.

Cloud Run is a serverless service. So you can't connect to a Cloud Run instance. You need to do the work in your Dockerfile.

See also
Example 1: Build a Bundle in a Docker Container https://pnpm.io/docker#example-1-build-a-bundle-in-a-docker-container

[ezadeh]

I was getting the same error message; however, in my case it was `gunicorn` to serve. I spent hours trying out so many suggestions here and there, but none worked for me! So tried to run the same docker image locally, it was then I noticed my silly mistake: "unable to start container process: exec: "gunicorn": executable file not found in $PATH: unknown."

So, yes, `gunicron` package was missing from my `requirements.txt` file! I updated the file and tried again and everything started to work just fine; hope this helps.

[sathish297]

If it was previously working and has stopped working now. I observed that if I close the session and come back to it later, the settings change for some reason.

Please check.
1. Your Service Settings

2. Container image url

3. Docker file in build settings