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Commands to control docker and related technologies
Building Images
docker build
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Build a new image from the source code at PATH
docker build -t myimg . |
-q
|
Suppress the output generated by containers |
--rm
|
Remove intermediate containers after a successful build |
-t
|
Repository name (and optionally a tag) for the image |
Examples:
Simplest possible build instruction:
docker build .
Name image and tag as v1.5:
docker build -t myorg/myimg:1.5 .
Misc useful commands
attach |
Attach to a running container |
cp |
Copy files/folders from a container's filesystem to the host path |
create |
Create a new container |
exec |
Run a command in a running container |
images |
List images |
export |
Stream the contents of a container as a tar archive |
import |
Create a new filesystem image from the contents of a tarball |
inspect |
Return low-level information on a container or image |
kill |
Kill a running container |
load |
Load an image from a tar archive |
logs |
Fetch the logs of a container |
port |
Lookup the public-facing port that is NAT-ed to PRIVATE_PORT |
ps |
List containers |
pull |
Pull an image or a repository from a Docker registry server |
push |
Push an image or a repository to a Docker registry server |
rm |
Remove one or more containers |
rmi |
Remove one or more images |
save |
Save an image to a tar archive |
search |
Search for an image on the Docker Hub |
start |
Start a stopped container |
stop |
Stop a running container |
top |
Lookup the running processes of a container |
wait |
Block until a container stops, then print its exit code |
Run docker COMMAND --help for help on the command.
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Running Docker
docker run
|
starts a process with its own file system, its own networking, and its own isolated process tree
docker run -itP image |
--name
|
name the container
docker run --name=somename org |
-t
|
terminal interface |
-i
|
interactive session |
-d
|
daemon Mode |
-P
|
publish all exposed ports |
-p
|
expose specific port
-p ip:hostport:containerport |
--rm
|
remove intermediate images |
-v
|
bind mount a volume
-v /host:/container |
Examples:
run an interactive session:
sudo docker run -P --name=somename image
run container in background, on port 80:
sudo docker run --d -v /etc/appdata:/data -p 0.0.0.0:80:8080 --rm nginx
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Dockerfiles (for creating images)
FROM
|
set base image for this image
FROM <image>:<tag> |
MAINTAINER
|
The author of the image
MAINTAINER <name> |
RUN
|
execute commands in new layer
RUN <command>
RUN ["executable", "param1", ...] |
CMD
|
provide default for an executing container
CMD ["executable","param1",...] |
LABEL
|
add metadata to image
LABEL <key>=<value> <key>=<value> |
EXPOSE
|
listen on the network ports
EXPOSE <port> [<port>...] |
ENV
|
set the environment variables
ENV <key> <value>
ENV <key>=<value> <key>=<value> |
ADD /COPY??
|
copies new files from <src> and adds them to the container at <dest>.
ADD <src>... <dest> |
ENTRYPOINT
|
configure container to run as an executable
ENTRYPOINT ["exe", "arg"...] |
VOLUME
|
create externally mounted volumes
VOLUME ["/data"] |
USER
|
sets the user name or UID to use when running the image
USER<user> |
WORKDIR
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sets working dir for any RUN, CMD, ENTRYPOINT, COPY and ADD instructions:
WORKDIR /path/to/workdir |
ONBUILD
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adds a trigger instruction for execution when image is used as base of another build
ONBUILD [INSTRUCTION] |
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