Docker port 9000?

[dahamsta]

I just noticed that the docker container is listening on port 9000 as well as port 80, why is that?

NAME                IMAGE                         COMMAND                  SERVICE             CREATED             STATUS              PORTS
rssbridge           rssbridge/rss-bridge:latest   "/app/docker-entrypo…"   rssbridge           5 seconds ago       Up 1 second         9000/tcp, 127.0.0.1:3007->80/tcp

[dahamsta]

Back to this again, conflicting with another container again, can 9000 be changed?

[dvikan]

root@86a5fc89df98:/var/www/html# netstat -ntlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      11/nginx: master pr 
tcp6       0      0 :::80                   :::*                    LISTEN      11/nginx: master pr 
tcp6       0      0 :::9000                 :::*                    LISTEN      16/php-fpm: master  

9000 is the default php-fpm port. this is from inside the docker container right? i dont understand why this is a problem. im not good at docker.

maybe @Alkarex can give advice

[Alkarex]

Hello,
This is because the base image used since the move to nginx already has some defaults:

https://github.com/docker-library/php/blob/7838b365f3262d70e7b164ffae852407a7a990b7/8.0/buster/fpm/Dockerfile#L276

And as far as I know, it is not possible to unexpose a port from a parent image: moby/moby#3465

If you are interested, I could provide a PR with an updated base image (i.e. the parent base image of what is used at the moment) solving those problems.

[Alkarex]

But @dahamsta, can you show the command you used to run this container?

[Alkarex]

See PR #3500
Tests / feedback welcome

[dahamsta]

I actually switched to a manual install last night, didn't realise it was so simple, no idea why I went Docker in the first place. However for reference, here's my docker-compose.yml:

version: '3.3' services: rssbridge: container_name: rssbridge image: rssbridge/rss-bridge:latest restart: unless-stopped ports: - 127.0.0.1:3006:80 volumes: - ./config:/config

Thanks for switching to a socket though, it will solve the problem for anyone else that needs port 9000 for something. (In my case it was Nextcloud All-In-One, on which the port wasn't configurable.)