Technical Nonsense: Docker commands

Docker Help

you@tutorial:~$ docker

Usage: Docker [OPTIONS] COMMAND [arg...]

-H="127.0.0.1:4243": Host:port to bind/connect to

A self-sufficient runtime for linux containers.

Commands:

attach Attach to a running container

build Build a container from a Dockerfile

commit Create a new image from a container's changes

diff Inspect changes on a container's filesystem

export Stream the contents of a container as a tar archive

history Show the history of an image

images List images

import Create a new filesystem image from the contents of a tarball

info Display system-wide information

insert Insert a file in an image

inspect Return low-level information on a container

kill Kill a running container

logs Fetch the logs of a container

port Lookup the public-facing port which is NAT-ed to PRIVATE_PORT

ps List containers

pull Pull an image or a repository from the Docker registry server

push Push an image or a repository to the Docker registry server

restart Restart a running container

rm Remove a container

rmi Remove an image

run Run a command in a new container

search Search for an image in the Docker index

start Start a stopped container

stop Stop a running container

tag Tag an image into a repository

version Show the Docker version information

wait Block until a container stops, then print its exit code

Search Image

you@tutorial:~$ docker search tutorial

Found 1 results matching your query ("tutorial")

NAME DESCRIPTION

learn/tutorial An image for the interactive tutorial

Pull Image

you@tutorial:~$ docker pull tutorial

Pulling repository tutorial

2013/06/19 19:27:03 HTTP code: 404

you@tutorial:~$ docker pull learn/tutorial

Pulling repository learn/tutorial from https://index.docker.io/v1

Pulling image 8dbd9e392a964056420e5d58ca5cc376ef18e2de93b5cc90e868a1bbc8318c1c (precise) from ubuntu

Pulling image b750fe79269d2ec9a3c593ef05b4332b1d1a02a62b4accb2c21d589ff2f5f2dc (12.10) from ubuntu

Pulling image 27cf784147099545 () from tutorial

Run a command

you@tutorial:~$ docker run learn/tutorial echo "Hello World!"

Hello World!

Install a program on top of a base image. Your changes to the filesystem have been kept, but are not yet saved.

Install package in container

you@tutorial:~$ docker run learn/tutorial apt-get install -y ping

Reading package lists...

Building dependency tree...

The following NEW packages will be installed:

iputils-ping

0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.

Need to get 56.1 kB of archives.

After this operation, 143 kB of additional disk space will be used.

Get:1 http://archive.ubuntu.com/ubuntu/ precise/main iputils-ping amd64 3:20101006-1ubuntu1 [56.1 kB]

debconf: delaying package configuration, since apt-utils is not installed

Fetched 56.1 kB in 1s (50.3 kB/s)

Selecting previously unselected package iputils-ping.

(Reading database ... 7545 files and directories currently installed.)

Unpacking iputils-ping (from .../iputils-ping_3%3a20101006-1ubuntu1_amd64.deb) ...

Setting up iputils-ping (3:20101006-1ubuntu1) ...

List installed containers

you@tutorial:~$ docker ps -l

ID IMAGE COMMAND CREATED STATUS PORTS

6982a9948422 ubuntu:12.04 apt-get install ping 1 minute ago Exit 0

Save / Commit changes to Docker container

you@tutorial:~$ docker commit 6982a9948422 learn/ping

effb66b31edb ==> Image ID

you@tutorial:~$ docker run learn/ping ping www.google.com

PING www.google.com (74.125.239.129) 56(84) bytes of data.

64 bytes from nuq05s02-in-f20.1e100.net (74.125.239.148): icmp_req=1 ttl=55 time=2.23 ms

64 bytes from nuq05s02-in-f20.1e100.net (74.125.239.148): icmp_req=2 ttl=55 time=2.30 ms

64 bytes from nuq05s02-in-f20.1e100.net (74.125.239.148): icmp_req=3 ttl=55 time=2.27 ms

64 bytes from nuq05s02-in-f20.1e100.net (74.125.239.148): icmp_req=4 ttl=55 time=2.30 ms

64 bytes from nuq05s02-in-f20.1e100.net (74.125.239.148): icmp_req=5 ttl=55 time=2.25 ms

64 bytes from nuq05s02-in-f20.1e100.net (74.125.239.148): icmp_req=6 ttl=55 time=2.29 ms

64 bytes from nuq05s02-in-f20.1e100.net (74.125.239.148): icmp_req=7 ttl=55 time=2.23 ms

64 bytes from nuq05s02-in-f20.1e100.net (74.125.239.148): icmp_req=8 ttl=55 time=2.30 ms

64 bytes from nuq05s02-in-f20.1e100.net (74.125.239.148): icmp_req=9 ttl=55 time=2.35 ms

-> This would normally just keep going. However, this emulator does not support Ctrl-C, so we quit here.

Remember you can specify a container using the first three or four characters of its ID.

Display information

you@tutorial:~$ docker inspect efe

[2013/07/30 01:52:26 GET /v1.3/containers/efef/json

{

"ID": "efefdc74a1d5900d7d7a74740e5261c09f5f42b6dae58ded6a1fde1cde7f4ac5",

"Created": "2013-07-30T00:54:12.417119736Z",

"Path": "ping",

"Args": [

"www.google.com"

"Config": {

"Hostname": "efefdc74a1d5",

"User": "",

"Memory": 0,

"MemorySwap": 0,

"CpuShares": 0,

"AttachStdin": false,

"AttachStdout": true,

"AttachStderr": true,

"PortSpecs": null,

"Tty": false,

"OpenStdin": false,

"StdinOnce": false,

"Env": null,

"Cmd": [

"ping",

"www.google.com"

"Dns": null,

"Image": "learn/ping",

"Volumes": null,

"VolumesFrom": "",

"Entrypoint": null

"State": {

"Running": true,

"Pid": 22249,

"ExitCode": 0,

"StartedAt": "2013-07-30T00:54:12.424817715Z",

"Ghost": false

"Image": "a1dbb48ce764c6651f5af98b46ed052a5f751233d731b645a6c57f91a4cb7158",

"NetworkSettings": {

"IPAddress": "172.16.42.6",

"IPPrefixLen": 24,

"Gateway": "172.16.42.1",

"Bridge": "docker0",

"PortMapping": {

"Tcp": {},

"Udp": {}

}

"SysInitPath": "/usr/bin/docker",

"ResolvConfPath": "/etc/resolv.conf",

"Volumes": {},

"VolumesRW": {}

Save Docker changes

you@tutorial:~$ docker push learn/ping

The push refers to a repository [learn/ping] (len: 1)

Processing checksums

Sending image list

Pushing repository learn/ping (1 tags)

Pushing 8dbd9e392a964056420e5d58ca5cc376ef18e2de93b5cc90e868a1bbc8318c1c

Image 8dbd9e392a964056420e5d58ca5cc376ef18e2de93b5cc90e868a1bbc8318c1c already pushed, skipping

Pushing tags for rev [8dbd9e392a964056420e5d58ca5cc376ef18e2de93b5cc90e868a1bbc8318c1c] on {https://registry-1.docker.io/v1/repositori

es/learn/ping/tags/latest}

Pushing a1dbb48ce764c6651f5af98b46ed052a5f751233d731b645a6c57f91a4cb7158

Pushing 11.5 MB/11.5 MB (100%)

Pushing tags for rev [a1dbb48ce764c6651f5af98b46ed052a5f751233d731b645a6c57f91a4cb7158] on {https://registry-1.docker.io/v1/repositori

es/learn/ping/tags/latest}

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\ V V / __/ | | | (_| | (_) | | | | __/ |_|

\_/\_/ \___|_|_| \__,_|\___/|_| |_|\___| (_)

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Technical Nonsense

Monday, September 29, 2014

Docker commands