mount /dev removes host's ptmx #2
Description
I've been having ssh'ing issues to my server after running the container.
It looks like after running it, docker removes /dev/ptmx, consequently messing up the tty's, and not giving me an interactive shell.
I tried to mount /dev in read-only mode to see what's going on, and as you can see, it tries to remove /dev/ptmx:
$ docker run -d -v /var/run/docker.sock:/var/run/docker.sock:ro -e NEW_RELIC_LICENSE_KEY=<KEY> --privileged --pid="host" --net="host" --ipc="host" -v /sys:/sys -v /dev:/dev:ro --restart=always --name newrelic uzyexe/newrelic
<CONTAINER_ID>
Error response from daemon: Cannot start container <CONTAINER_ID>: [8] System error: remove /apps/docker/devicemapper/mnt/<CONTAINER_ID>/rootfs/dev/ptmx: device or resource busy
to fix that, I had to re-create ptmx:
$ rm -rf /dev/ptmx
$ mknod /dev/ptmx c 5 2
$ chmod 666 /dev/ptmx
$ umount /dev/pts
$ rm -rf /dev/pts
$ mkdir /dev/pts
$ mount -vt devpts -o gid=4,mode=620 none /dev/pts
It looks like a workaround is to create a tty for this container, but not mount /dev:
docker run -t -d -v /var/run/docker.sock:/var/run/docker.sock:ro -e NEW_RELIC_LICENSE_KEY=<KEY> --privileged --pid="host" --net="host" --ipc="host" -v /sys:/sys --restart=always --name newrelic uzyexe/newrelic
thoughts?