Docker 初次接触
近期看了不少docker介绍性文章，也听了不少公开课，于是今天去官网逛了逛，发现了一个交互式的小教程于是决定跟着学习下。
仅仅是把认为重点的知识记录下来，不是非常系统的学习和笔记。
理论部分
- Docker 引擎包括了两个部分，一个守护进程作为server端来管理全部的容器。
一个client。能够远程来控制服务端。
- Docker有公共的云端仓库 Docker Hub Registry。里面有能够使用的镜像
- 你能够觉得容器containers就是沙箱box中的一个进程。这个盒子中包括了全部一个进程须要的东西，文件系统。系统库。shell等等，仅仅是默认情况下他们是没有执行的。
- 我们能够在操纵和改变容器，然后通过命令保存成新的镜像
- 在须要使用容器id的地方。我们能够仅仅输入前几个字符
操作部分
docker help 能够查看能使用的命令和简单描写叙述
查看版本号
you@tutorial:~$ docker version
Docker Emulator version 0.1.3
Emulating:
Client version: 0.5.3
Server version: 0.5.3
Go version: go1.1
从公共云仓库中查找一个镜像
tutorial
you@tutorial:~$ docker search tutorial
Found 1 results matching your query (“tutorial”)
NAME DESCRIPTION
learn/tutorial An image for the interactive tutorial从仓库中拉取一个镜像。注意要写这个镜像的全名
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
启动一个docker而且执行命令
you@tutorial:~$ docker run learn/tutorial echo “hello boy”
hello boytips：这里是启动了一个容器而且执行了一个命令，当命令执行完的时候容器就停止了。能够通过docker的ps命令查看当前正在执行的容器。
you@tutorial:~$ docker ps
ID IMAGE COMMAND CREATED STATUS PORTS
安装一个软件ping
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)查看改变之后的容器，然后保存成learn/ping
you@tutorial:~$ docker ps -l
ID IMAGE COMMAND CREATED STATUS PORTS
6982a9948422 ubuntu:12.04 apt-get install ping 1 minute ago Exit 0
you@tutorial:~$ docker commit 6982 learn/ping
effb66b31edb
使用新的镜像ping
google
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
查看正在执行的容器的状态
you@tutorial:~$ docker ps
ID IMAGE COMMAND CREATED STATUS PORTS
efefdc74a1d5 learn/ping:latest ping www.google.com 37 seconds ago Up 36 seconds
you@tutorial:~$ docker inspect efef
[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”: {}查看本地镜像
you@tutorial:~$ docker images
ubuntu latest 8dbd9e392a96 4 months ago 131.5 MB (virtual 131.5 MB)
learn/tutorial latest 8dbd9e392a96 2 months ago 131.5 MB (virtual 131.5 MB)
learn/ping latest effb66b31edb 10 minutes ago 11.57 MB (virtual 143.1 MB)
把镜像推送到云端
docker inspect efe
tips： 这个是推送到docker的云仓库的，会有你自己的独立命名控件。账号注冊地址
这个十分钟交互式的短教程能够让我们对docker有个感性的认识。最主要的使用和激发兴趣。
本文出自 “orangleliu笔记本”博客，请务必保留此出处http://blog.csdn.net/orangleliu/article/details/38648075