docker: [dumb-init] Unable to detach from controlling tty (errno=25 Inappropriate ioctl for device).

[OnkelTem]

Every time I start the wstunnel server docker container it starts with the lines:

wstunnel-server  | [dumb-init] Unable to detach from controlling tty (errno=25 Inappropriate ioctl for device).
wstunnel-server  | [dumb-init] Child spawned with PID 7.
wstunnel-server  | [dumb-init] Unable to attach to controlling tty (errno=25 Inappropriate ioctl for device).
wstunnel-server  | [dumb-init] setsid complete.

What does it mean and how to get rid of them?

[erebe]

It is not an issue, just that the terminal output of a container is a bit différent than regular terminal/tty.

You can start the container by changing the entrypoint and remove the -v flag of dumb-init.

look at docker command line to how to do that.

wstunnel/Dockerfile

Line 62 in d34a003

ENTRYPOINT ["/usr/bin/dumb-init", "-v", "--"]