今天要在我的本子上搭建一個mediawiki環境，之前的經驗，用fig去配置是最簡單的了。可是下載fig失敗，去官網一看才知道，fig已經被compose工具取代了。原文是這樣說的：
~~~
Fig has been replaced by Docker Compose, and is now deprecated. The new documentation is on the Docker website.
~~~
既然如此，就去官網看看compose到底為何物。?
[compose](http://docs.docker.com/compose/)是用來在docker中定義和運行復雜應用的小工具，比如在一個文件中定義多個容器，只用一行命令就可以讓一切就緒并運行。它的功能與我們所熟知的fig相似，換句話說，compose是fig的替代產品，fig就這樣退出docker的歷史舞臺了。
然而在[github上的compose](https://github.com/docker/compose/releases/)有這樣的說法：
~~~
Fig has been renamed to Docker Compose, or just Compose for short. This has several implications for you:
The command you type is now docker-compose, not fig.
You should rename your fig.yml to docker-compose.yml.
~~~
看來fig是被重命名成compose了，配置文件變成了docker-compose.yml，其他都幾乎一樣。不但fig不能下載了，原來有fig工具的環境用fig去搭建mediawiki都不可用了，報錯如下：
~~~
fig up -d
Creating hgserver_mediawiki_1...
Pulling image amclain/hgweb...
Traceback (most recent call last):
File "<string>", line 3, in <module>
File "/code/build/fig/out00-PYZ.pyz/fig.cli.main", line 31, in main
File "/code/build/fig/out00-PYZ.pyz/fig.cli.docopt_command", line 21, in sys_dispatch
File "/code/build/fig/out00-PYZ.pyz/fig.cli.command", line 28, in dispatch
File "/code/build/fig/out00-PYZ.pyz/fig.cli.docopt_command", line 24, in dispatch
...
fig.progress_stream.StreamOutputError: Get https://index.docker.io/v1/repositories/amclain/hgweb/images: dial tcp: lookup index.docker.io on 10.202.72.118:53: read udp 10.202.72.118:53: i/o timeout
~~~
如此看來，使用compose是必須的了。?
下面說說compose的用法。?
1.安裝compose?
OS X和64位的Linux用如下命令安裝。
~~~
# curl -L https://github.com/docker/compose/releases/download/1.1.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
#chmod +x /usr/local/bin/docker-compose
~~~
其他平臺可以像python包一樣安裝：
~~~
$ sudo pip install -U docker-compose
~~~
2.命令簡介
~~~
$ docker-compose
Fast, isolated development environments using Docker.
Usage:
docker-compose [options] [COMMAND] [ARGS...]
docker-compose -h|--help
Options:
--verbose Show more output
--version Print version and exit
-f, --file FILE Specify an alternate compose file (default: docker-compose.yml)
-p, --project-name NAME Specify an alternate project name (default: directory name)
Commands:
build Build or rebuild services
help Get help on a command
kill Kill containers
logs View output from containers
port Print the public port for a port binding
ps List containers
pull Pulls service images
rm Remove stopped containers
run Run a one-off command
scale Set number of containers for a service
start Start services
stop Stop services
restart Restart services
up Create and start containers
~~~
3.compose編寫mediawiki的docker-compose.yml?
首先編寫compose的配置文件，語法與fig類似，文件名為docker-compose.yml，內容如下：
~~~
wiki2:
image: 'nickstenning/mediawiki'
ports:
- "8880:80"
links:
- db:database
volumes:
- /data/wiki2:/data
db:
image: "mysql"
expose:
- "3306"
environment:
- MYSQL_ROOT_PASSWORD=defaultpass
~~~
4.創建并啟動mediawiki
~~~
$ docker-compose up -d
~~~
