Ubuntu14.04安装docker
Docker目前支持很多Gnu/Linux平台，使用较多的是Ubuntu与RHEL平台。本文使用作者小白的Ubuntu PC来演示如何安装docker。1
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$ sudo apt-get update
$ sudo apt-get install docker.io
安装完毕，启动docker，
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$ sudo service docker.io start
$ sudo docker info
Containers: 18
Images: 12
Storage Driver: aufs
Root Dir: /var/lib/docker/aufs
Dirs: 60
Execution Driver: native-0.2
Kernel Version: 3.13.0-55-generic
WARNING: No swap limit support
然后，使用ifconfig再看一下本机的IP信息，系统里会多出一个docker0的网卡，
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$ ifconfig
docker0 Link encap:EthernetHWaddr 56:84:7a:fe:97:99
inet addr:172.17.42.1Bcast:0.0.0.0Mask:255.255.0.0
inet6 addr: fe80::5484:7aff:fefe:9799/64 Scope:Link
UP BROADCAST RUNNING MULTICASTMTU:1500Metric:1
RX packets:103571 errors:0 dropped:0 overruns:0 frame:0
TX packets:168898 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5959403 (5.9 MB)TX bytes:250822609 (250.8 MB)
eth0 Link encap:EthernetHWaddr 11:11:11:11:11:11
UP BROADCAST MULTICASTMTU:1500Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B)TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNINGMTU:65536Metric:1
RX packets:13818 errors:0 dropped:0 overruns:0 frame:0
TX packets:13818 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1315817 (1.3 MB)TX bytes:1315817 (1.3 MB)
veth9538Link encap:EthernetHWaddr 1e:5d:32:39:ad:c2
inet6 addr: fe80::1c5d:32ff:fe39:adc2/64 Scope:Link
UP BROADCAST RUNNINGMTU:1500Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:7 errors:0 dropped:1 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:648 (648.0 B)TX bytes:558 (558.0 B)
wlan0 Link encap:EthernetHWaddr 10:10:10:10:10:10
inet addr:192.168.1.106Bcast:192.168.1.255Mask:255.255.255.0
inet6 addr: fe80::ae72:89ff:fef4:358a/64 Scope:Link
UP BROADCAST RUNNING MULTICASTMTU:1500Metric:1
RX packets:3740188 errors:0 dropped:0 overruns:0 frame:0
TX packets:2472330 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:5267690063 (5.2 GB)TX bytes:246334898 (246.3 MB)
接下来，进行安装debian的镜像，使用docker search来搜索一下关于debian的镜像，
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$ sudo docker search debain
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
bailaohe/java Docker Image with Oracle JDK7 installed o... 0
rangalo/debian Debain wheezy with some basic tools like w... 0
安装rangalo/debian的镜像，使用docker pull命令，
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$ sudo docker pull rangalo/debian
Pulling repository rangalo/debian
ce6dc3910f8d: Download complete
511136ea3c5a: Download complete
2e5f1fce06be: Download complete
63f650c4db34: Download complete
431ffbc97c99: Download complete
52fc6fdb293f: Download complete
查看系统中的docker镜像，使用docker images命令，
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$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
ubuntu/wget nginx_v1 51bc7cd125d7 43 minutes ago 633.6 MB
ubuntu/wget nginx a4e70c05a75d 57 minutes ago 579.7 MB
ubuntu/wget latest 6c95a7fc2fd2 About an hour ago 134.7 MB
ubuntu latest 6d4946999d4f 2 weeks ago 188.3 MB
ubuntu 12.04 5c97af892079 3 weeks ago 133.4 MB
rangalo/debian latest ce6dc3910f8d 12 months ago 124.5 MB
启动刚刚下载的rangalo/debian镜像，使用docker run命令，
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$ sudo docker run -i -t rangalo/debian /bin/bash
其中，-i,--interactive
-t, --tty
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root@1fbc03b63a70:/#
root@1fbc03b63a70:/# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
29: eth0: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 02:53:a8:21:96:34 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.14/16 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::53:a8ff:fe21:9634/64 scope link
valid_lft forever preferred_lft forever
可以看到，该容器的IP地址为172.17.0.14，我们ping一下我们的宿主机，看是否能够通信？
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root@1fbc03b63a70:/# ping -c 2 172.17.42.1
PING 172.17.42.1 (172.17.42.1): 48 data bytes
56 bytes from 172.17.42.1: icmp_seq=0 ttl=64 time=0.167 ms
56 bytes from 172.17.42.1: icmp_seq=1 ttl=64 time=0.124 ms
--- 172.17.42.1 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.124/0.146/0.167/0.000 ms
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