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docker:start [2015/03/03 11:26] vondra |
docker:start [2015/03/04 15:50] vondra |
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| + | ======Docker====== | ||
| + | * best source of docker wisdom: https://github.com/wsargent/docker-cheat-sheet | ||
| + | |||
| + | ===== Building a docker image ===== | ||
| + | - Create Dockerfile or clone docker repository | ||
| + | - Run:<code>docker build -t YourImage /path/to/dir/with/dockerfile</code> | ||
| + | |||
| ===== Running docker container ===== | ===== Running docker container ===== | ||
| <code>docker run -v /srv/elgoog:/mnt -d algoo</code> | <code>docker run -v /srv/elgoog:/mnt -d algoo</code> | ||
| Line 6: | Line 13: | ||
| * -c cpu limit | * -c cpu limit | ||
| + | ===== Attach to the running container (docker >= 1.3) ===== | ||
| + | <code>docker exec -it <containerIdOrName> bash</code> | ||
| + | ===== Attach to the running container (docker < 1.3) ===== | ||
| + | * first discover all running containers on host <code> | ||
| + | docker ps </code> | ||
| + | * output: <code> | ||
| + | root@xen-docker:~# docker ps | ||
| + | CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES | ||
| + | d5e31d1cbe9c algoo:latest supervisord -n 3 seconds ago Up 2 seconds 80/tcp furious_hopper | ||
| + | ec704ed40100 algoo:latest supervisord -n 4 seconds ago Up 3 seconds 80/tcp distracted_babbage </code> | ||
| + | * attach to the container by id (works only if COMMAND = bash)<code> | ||
| + | docker attach d5e31d1cbe9c | ||
| + | </code> | ||
| ===== Copying files between host and container ===== | ===== Copying files between host and container ===== | ||
| * The cleanest way how to copy files between host and container is to mount an image to the container <code>docker run -v /path/to/hostdir:/mnt $container | * The cleanest way how to copy files between host and container is to mount an image to the container <code>docker run -v /path/to/hostdir:/mnt $container | ||
| cp /mnt/sourcefile /path/to/destfile</code> | cp /mnt/sourcefile /path/to/destfile</code> | ||
| + | |||
| + | ===== Delete old docker images and keep the running ones ===== | ||
| + | * remove images from docker<code>docker ps -a | grep 'Exited' | awk '{print $1}' | xargs --no-run-if-empty docker rm </code> | ||
| + | * delete them physically<code>docker images --no-trunc| grep none | awk '{print $3}' | xargs -r docker rmi </code> | ||
docker/start.txt · Last modified: 2015/03/04 16:44 by vondra