Logging separate files on disk to stdout and stderr

[FoxxMD]

Building on Logging Files on Disk from the docs -- I wanted to output nginx logs, which logs separately to access.log and error.log, respectively to stdout and stderr. But the example in the docs wasn't enough to figure this out.

Here's how to do this using docker-compose

  tail-logs:
    image: alpine
    volumes:
      - /host/path/to/nginx:/var/log/nginx:ro
    command: >
      sh -c "tail -f /var/log/nginx/access.log &
             tail -f /var/log/nginx/error.log >&2"
    network_mode: none
    restart: unless-stopped

The first log will be output to stdout, the second to stderr

[amir20]

While that might work. You are probably adding extra steps that are unnecessary. It would be better if you just log your nginx to stdout. Something like

http {
    ...
    access_log /dev/stdout;
    error_log /dev/stderr;
    ...
}

I suggest using the tail -f option only if you don't have control over the container.

[FoxxMD]

This works but not if I want to also have actual log files. I have other applications that use these files like Crowdstrike and GoAccess. Additionally, my example was more to showcase how to take any file and tail to stdout/stderr, not specifically for nginx.