Build image from Dockerfile in current directory, tag it with a specific name and label:
docker build . -t my-image:v2
Run nginx container with port mapping (host:container):
docker run -p 8091:80 nginx
Run nginx container with volume mapping (hostdir/containterdir):
docker run -v /some/local/dir/:/usr/share/nginx/html:ro nginx
Run container interactively:
# hostname
my_docker_host
# docker run -it alpine
/ # hostname
f1de6589e1ad
Run a command on the container, then exit:
docker run alpine cat /etc/alpine-release
3.8.0
Attach to a running container in interactive mode:
# docker exec -it a5d95c2cc9a2 sh
sh-4.2#
Bypass CMD or ENTRYPOINT (see below how to get them):
# docker run -it nginx bash
root@0aa132d3241b:/#
or
docker run -it --entrypoint bash nginx
root@9c36f4645b92:/#
Docker commandline supports Go template formatting, the placeholder for each subcommand can be found on its documentation page.
For example:
- https://docs.docker.com/engine/reference/commandline/images/#formatting
- https://docs.docker.com/engine/reference/commandline/ps/#formatting etc.
Generic formatting guide:
Examples:
# docker images --format "table {{.Repository}}\t{{.Tag}}\t{{.Size}}"
REPOSITORY TAG SIZE
trello-vue-report latest 11.1MB
alpine latest 4.41MB
node 8.6-alpine 67.2MB
# docker ps --format "table {{.ID}}\t{{.Status}}\t{{.Image}}\t{{.Size}}\t{{.Labels}}"
CONTAINER ID STATUS IMAGE SIZE LABELS
8cbb526aeb93 Up 40 seconds alpine 0B (virtual 4.41MB)
0ae0aba9e053 Up 2 minutes trello-vue-report 2B (virtual 11.1MB) description=Test
# docker inspect --format='{{.State.Status}}' 8cbb526aeb93
running
# docker inspect --format='{{.State.StartedAt}}' 8cbb526aeb93
2018-08-22T10:48:17.343581763Z
Get CMD and ENTRYPOINT for a specific image:
# docker image inspect --format='CMD={{.Config.Cmd}}{{println}}ENTRYPOINT={{.Config.Entrypoint}}' nginx
CMD=[nginx -g daemon off;]
ENTRYPOINT=[]
Associate running container to its compose project:
# docker inspect --format='{{.Name}} {{index .Config.Labels "com.docker.compose.project"}}' a044556677a0
/traefik reverseproxy
For all running containers:
docker ps --format='{{.ID}}' | xargs docker inspect --format='{{.Name}} {{index .Config.Labels "com.docker.compose.project"}}'
/traefik reverseproxy
/utility_watchtower utility
/somethine another_compose