Heroku deployment of n8n using Docker fails. Below are custom examples:
Provision PostgreSQL:
heroku addons:create pg-mini --version=11 -a alt-app
Dockerfile:
FROM custom/n8n:latest
heroku.yml:
setup:
config:
APP_HOST: "alt-app.herokuapp.com"
SERVER_PORT: "${PORT}"
build:
docker:
web: Dockerfile
Logs:
2022-01-01T12:00:00 app[web.1]: Warning: Incorrect PID configuration detected.
2022-01-01T12:00:10 heroku[router]: Error H10: App crashed unexpectedly.
Based on my experience troubleshooting similar issues, I believe this problem might be related to the way your container is configured to start the application. I once had a deployment on Heroku where the process was not correctly bound to the expected port, leading to H10 errors. In my case, ensuring that the Dockerfile properly exposed the port and that Heroku’s environment variables matched up with my application’s startup command was key. Also, review any custom scripts or commands in your image that might be interfering with Heroku’s process management. Double-checking these details resolved the crash in my deployment.
hey, i faced a similar problem, double check that your docker entrpoint or cmd properly utilizes the heroku port env. sometimes the app fails to bind if that doesn’t work as expected. hope this helps, good luck!
Based on my previous experiments deploying containerized applications on Heroku, it is important to verify that your container’s start command and environment variables work harmoniously. I once faced a similar issue where a misconfigured start command led to a process that didn’t wait long enough for the dynamic PORT variable to be applied, causing premature termination. I recommend checking that every internal process in the container respects the PORT environment variable allocated by Heroku. Also, review any custom entry scripts to ensure they do not override or conflict with Heroku’s process expectations.