Monday, September 29, 2014

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
login     Register or Login to the Docker registry server
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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