前沿：
聽同僚說，以後的dba申請可能有部分走其他部門的docker ，那邊貌似在搞一個類似docker的平台管理系統，據說很霸道。于是乎，我自己也想嘗試寫一個簡單的doker管理平台。 做為起步我先搞搞docker api，docker官網有個docker-py，用起來很是清爽簡單。
首先安裝docker的python相關的子產品。
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<code>root@dev-ops:~</code><code># pip install docker-py</code>
<code>Requirement already satisfied (use --upgrade to upgrade): docker-py </code><code>in</code> <code>/usr/local/lib/python2</code><code>.7</code><code>/dist-packages</code>
<code>Requirement already satisfied (use --upgrade to upgrade): requests==2.2.1 </code><code>in</code> <code>/usr/lib/python2</code><code>.7</code><code>/dist-packages</code> <code>(from docker-py)</code>
<code>Requirement already satisfied (use --upgrade to upgrade): six>=1.3.0 </code><code>in</code> <code>/usr/lib/python2</code><code>.7</code><code>/dist-packages</code> <code>(from docker-py)</code>
<code>Requirement already satisfied (use --upgrade to upgrade): websocket-client==0.11.0 </code><code>in</code> <code>/usr/local/lib/python2</code><code>.7</code><code>/dist-packages</code> <code>(from docker-py)</code>
<code>Requirement already satisfied (use --upgrade to upgrade): mock==1.0.1 </code><code>in</code> <code>/usr/local/lib/python2</code><code>.7</code><code>/dist-packages</code> <code>(from docker-py)</code>
<code>Requirement already satisfied (use --upgrade to upgrade): coverage==3.7.1 </code><code>in</code> <code>/usr/local/lib/python2</code><code>.7</code><code>/dist-packages</code> <code>(from docker-py)</code>
<code>Cleaning up...</code>
<code>root@dev-ops:~</code><code># </code>
<code>root@dev-ops:~</code><code>#</code>
咱們先檢視下已經下載下傳好的子產品
[root@dev-ops ~]$docker images
<code>http:</code><code>//rfyiamcool</code><code>.blog.51cto.com</code><code>/1030776/1539500</code>
<code>REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE</code>
<code>ubuntu_redis latest 57672d1b5979 About an hour ago 257.6 MB</code>
<code>rastasheep</code><code>/ubuntu-sshd</code> <code>14.04 636d86f228c7 2 days ago 254.9 MB</code>
<code>rastasheep</code><code>/ubuntu-sshd</code> <code>12.04 1147568d245b 6 days ago 144.6 MB</code>
<code>rastasheep</code><code>/ubuntu-sshd</code> <code>13.10 8a63145eed52 6 days ago 231.6 MB</code>
<code>rastasheep</code><code>/ubuntu-sshd</code> <code>latest 47386e322f5d 8 days ago 254.9 MB</code>
<code>lemonbar</code><code>/centos6-ssh</code> <code>latest b78c71c001db 11 days ago 296.9 MB</code>
<code>rastasheep</code><code>/ubuntu-sshd</code> <code>12.10 c9c48c3cb34c 4 weeks ago 188.9 MB</code>
<code>rastasheep</code><code>/ubuntu-sshd</code> <code>13.04 bf49ae3d5534 4 weeks ago 213.1 MB</code>
<a href="http://s3.51cto.com/wyfs02/M01/45/C3/wKiom1Pq-dvxth9MAAK2XDrkoH0863.jpg" target="_blank"></a>
檢視已經啟動的容器
[root@dev-ops ~]$docker ps -a
<code>CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES</code>
<code>c5f6d0240531 ubuntu_redis:latest </code><code>/usr/sbin/sshd</code> <code>-D About an hour ago Up About an hour 0.0.0.0:49154->22</code><code>/tcp</code> <code>redis_sshd </code>
<code>df7b7568fa7a rastasheep</code><code>/ubuntu-sshd</code><code>:latest </code><code>/usr/sbin/sshd</code> <code>-D About an hour ago Up About an hour 0.0.0.0:49153->22</code><code>/tcp</code> <code>test_sshd</code>
<a href="http://s3.51cto.com/wyfs02/M01/45/C3/wKiom1Pq-iyjKFhgAAJNPUnBE_w836.jpg" target="_blank"></a>
檢視 docker 相關的版本
[root@dev-ops ~]$docker version
<code>Client version: 0.9.1</code>
<code>Go version (client): go1.2.1</code>
<code>Git commit (client): 3600720</code>
<code>Server version: 0.9.1</code>
<code>Git commit (server): 3600720</code>
<code>Go version (server): go1.2.1</code>
<code>Last stable version: 1.1.2, please update docker</code>
<code>[root@dev-ops ~]$</code>
好了，到現在為止 docker image有了，容器也有了，docker-py這個api也有了。。。
下面是我的操作的記錄，有過shell操作經驗的人，應該就很好上手的。
[root@dev-ops ~]$ipython
Python 2.7.6 (default, Mar 22 2014, 22:59:56)
Type "copyright", "credits" or "license" for more information.
IPython 1.2.1 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.
In [1]: import docker
建立docker的連結，這裡是通過sock連接配接的。
In [2]: c = docker.Client(base_url='unix://var/run/docker.sock',version='1.9',timeout=10)
我們可以看到裡面有很多的功能。
In [3]: c.
c.adapters c.copy c.headers c.login c.proxies c.send
c.attach c.create_container c.history c.logs c.pull c.start
c.attach_socket c.create_container_from_config c.hooks c.max_redirects c.push c.stop
c.auth c.delete c.images c.mount c.put c.stream
c.base_url c.diff c.import_image c.options c.remove_container c.tag
c.build c.events c.info c.params c.remove_image c.top
c.cert c.export c.insert c.patch c.request c.trust_env
c.close c.get c.inspect_container c.ping c.resize c.verify
c.commit c.get_adapter c.inspect_image c.port c.resolve_redirects c.version
c.containers c.get_image c.kill c.post c.restart c.wait
c.cookies c.head c.load_image c.prepare_request c.search
這裡是檢視已經部署好的images鏡像
In [3]: c.images()
Out[3]:
[{u'Created': 1407902496,
u'Id': u'57672d1b597912c7b6841c05c0e07e525890cfd64cbd37c84754e7d7e54ee766',
u'ParentId': u'47386e322f5deffbc04c777632e1f1ac7e6ddd6909ae6b9ce8d1d78dc2bb6d0c',
u'RepoTags': [u'ubuntu_redis:latest'],
u'Size': 2675587,
u'VirtualSize': 257554797},
{u'Created': 1407684299,
u'Id': u'636d86f228c7c6e844d1473245a9580d9c57fd0bfd1b5b9172aa5c168581978c',
u'ParentId': u'e882dd610d1ca64817106dcbda29b2c78536f5fb75f780583cc9fac0efe05398',
u'RepoTags': [u'rastasheep/ubuntu-sshd:14.04'],
u'Size': 0,
u'VirtualSize': 254925704},
{u'Created': 1407342004,
u'Id': u'1147568d245b369495b19b1943c0946a2b2d823d0a96b48bb7bee5f128090d29',
u'ParentId': u'12175cbcbe499c80dd71e3085467d9178a1b5cfa47ecf1463302e09fe2f09e58',
u'RepoTags': [u'rastasheep/ubuntu-sshd:12.04'],
u'VirtualSize': 144645266},
{u'Created': 1407341844,
u'Id': u'8a63145eed52cf9ae6bdb064f370469d6fa3653f0da5d370ece9e270baf8d9cb',
u'ParentId': u'ca60f67629d2c43012fb53f714e60672c4ad5b61520bb306e3a35614190dcf76',
u'RepoTags': [u'rastasheep/ubuntu-sshd:13.10'],
u'VirtualSize': 231639963},
{u'Created': 1407167259,
u'Id': u'47386e322f5deffbc04c777632e1f1ac7e6ddd6909ae6b9ce8d1d78dc2bb6d0c',
u'ParentId': u'a8bbc54283bbc341c703970ed429e4def6c034273ede59aaf451449164c95775',
u'RepoTags': [u'rastasheep/ubuntu-sshd:latest'],
u'VirtualSize': 254879210},
{u'Created': 1406884906,
u'Id': u'b78c71c001db87eb2da7049f5f9610039afd3484f65e22a3284098792460040d',
u'ParentId': u'e13b39edfcb4c5e15f876c2824fea1d738fb3825437162fad497138123f3235b',
u'RepoTags': [u'lemonbar/centos6-ssh:latest'],
u'VirtualSize': 296869021},
{u'Created': 1405333140,
u'Id': u'c9c48c3cb34c4b8305d7bae4f0c3c753fbca3ac96195e73e9fdab4a8fa24708a',
u'ParentId': u'30ffc511bbe11f6205cdc0f2749cadcc0c2eca4f7296285b1af867afcb6ef842',
u'RepoTags': [u'rastasheep/ubuntu-sshd:12.10'],
u'VirtualSize': 188947523},
{u'Created': 1405333120,
u'Id': u'bf49ae3d55344648b354bddf22b2f15c48e2d74e52933404757a9eb470ac35e3',
u'ParentId': u'561b2d67fd0a80367e9ab98f9893ce6d36006dbb452e7c8693f028fcaa5f6c7f',
u'RepoTags': [u'rastasheep/ubuntu-sshd:13.04'],
u'VirtualSize': 213124480}]
這裡是搜尋鏡像，比如我想搜下， ubuntu redis 字眼的，結果沒有搜到。 但是搜ubuntu_sshd有關的鏡像會發現有的。
In [5]: c.search('ubuntu_redis')
Out[5]: []
In [6]: c.search('ubuntu_sshd')
Out[6]:
[{u'description': u'',
u'is_official': False,
u'is_trusted': False,
u'name': u'pungoyal/ubuntu_sshd',
u'star_count': 0}]
這裡是下載下傳鏡像
In []: c.pull('core9/docker-mongodb')
In [6]: c.create_container(image="ubuntu_redis", command="/usr/sbin/sshd -D",name="test_nima")
{u'Id': u'15bd8d4ecd1a50604732e1f81763eb347a1cf8937da929799e65261b004894ce',
u'Warnings': None}
In [7]:
啟動容器
In [7]: c.start(container="15bd8d4ecd1a50604732e1f81763eb347a1cf8937da929799e65261b004894ce")
檢視日志
In [8]: c.logs(container="15bd8d4ecd1a50604732e1f81763eb347a1cf8937da929799e65261b004894ce")
Out[8]: ''
<a href="http://s3.51cto.com/wyfs02/M01/45/C3/wKiom1Pq--ChU7DPAAJOleUQxEU687.jpg" target="_blank"></a>
我們再試圖關閉下這個容器，然後inspect看下他的運作狀态
In [18]: c.stop('15bd8d4ecd1a')
In [20]: re_info = c.inspect_container('15bd8d4ecd1a')
In [22]: re_info['State']['Running']
Out[31]: False
<a href="http://s3.51cto.com/wyfs02/M02/45/C5/wKioL1PrAyzwF-K1AAIVBUcpyxg738.jpg" target="_blank"></a>
好了，我們通過docker shell看下剛才建立的結果。 我們在用python docker api的時候，建立了一個叫test_nima的容器。
<a href="http://s3.51cto.com/wyfs02/M01/45/C4/wKioL1Pq_JegbtxHAAKKqtWyJeQ809.jpg" target="_blank"></a>
篇幅的問題就不多說了， api幾乎包含了docker的功能，最少能滿足我的應用，及在開發中與運維平台的對接。朋友的公司已經在用純node.js寫了套api，為公司内部服務。其實官網和社群提供了好幾個web ui，但是那畢竟是别人寫的。改起來不簡單。我打算在下篇文章會介紹下， 如何自己實作一套簡單的docker rest api 接口。
偶了 ！
本文轉自 rfyiamcool 51CTO部落格，原文連結：http://blog.51cto.com/rfyiamcool/1539500，如需轉載請自行聯系原作者
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