Short tips & tricks for using Docker

1. Docker: Tips & Tricks
Dharmit Shah
@dharm1t

2. Who am I?
(Earlier)
@
@

3. Nice `docker ps` output
$ docker ps -a | less -S

4. Follow the logs
$ docker logs <containerid> -f

5. Stats for running container
$ docker stats <container-id> <container-id> … <container-id>

6. Copy files from host to container
$ docker cp /file/on/host <container-id>:/path/in/container

7. Fetch single value from docker
inspect
$ docker inspect --format '{{.State.Running}}' $(docker ps -lq)
$ docker inspect --format '{{.NetworkSettings.IPAddress}}' $(docker ps -lq)

8. docker exec instead of sshd or
nsenter
$ docker exec -it <container-id> /bin/bash

9. Old man staring at your mouse!
$ xhost local:root
$ docker run -d
-e DISPLAY=$DISPLAY
-v tmp/.X11-unix:/tmp/.X11-unix xeji

11. FROM debian:squeeze
RUN apt-get update &&
apt-get install -y xeji
RUN export uid=1000 gid=1000 &&
mkdir -p /home/developer &&
echo "developer:x:${uid}:${gid}:Developer,,,:/home/developer:/bin/bash" >>
/etc/passwd &&
echo "developer:x:${uid}:" >> /etc/group &&
echo "developer ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/developer &&
chmod 0440 /etc/sudoers.d/developer &&
chown ${uid}:${gid} -R /home/developer
USER developer
ENV HOME /home/developer
ENTRYPOINT ["/usr/bin/xeji"]