Docker and friends Cheat Sheet

A Software › Linux cheat sheet in English by aabs

Commands to control docker and related technologies

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Building Images

`docker build`	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.

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

Docker Compose

TBC

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`	sets working dir for any `RUN`, `CMD`, `ENTRYPOINT`, `COPY` and `ADD` instructions: `WORKDIR /path/to/workdir`
`ONBUILD`	adds a trigger instruction for execution when image is used as base of another build `ONBUILD [INSTRUCTION]`

Check out the Manual Page for more detail.

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Comments (1)

javafun 12:57 6 Dec 2016

PDF link is not working