安装clustershell
从https://github.com/cea-hpc/clustershell/downloads下面源码或者二进制包进行安装。
下面以CentOS6.6使用rpm安装为例：
wget https://github.com/downloads/cea-hpc/clustershell/clustershell-1.5.1-1.el6.noarch.rpm
rpm -ivh clustershell-1.5.1-1.el6.noarch.rpm
源码安装方式：
wget https://github.com/downloads/cea-hpc/clustershell/clustershell-1.5.1.tar.gz
tar -xvf clustershell-1.5.1.tar.gz
cd clustershell-1.5.1
sudo python setup.py install
mkdir /etc/clustershell
cp conf/* /etc/clustershell
使用clustershell
首先，对于我们要管理的节点，创建一个组。假如我们需要管理的是10台web server，主机名分别为web1-web10，那么我们先创建一个文件/etc/clustershell/groups，内容如下：
| web: web1 web2 web3 web4 web5 web6 web7 web8 web9 web10 |
其中：web是组名，web1-10是组下面的所有主机名。
接下来就可以使用clustershell批量执行命令了：
clush --user=root -g web "uptime" ### --user指明了ssh登录的用户；-g指明了组名；最后是批量执行的命令，将会在组下面所有节点执行该命令。
附录1：clustershell命令使用方法：
| Usage: clush [options] command Options:
--version show program‘s version number and exit
-h, --help show this help message and exit
-s GROUPSOURCE, --groupsource=GROUPSOURCE
optional groups.conf(5) group source to use
--nostdin don‘t watch for possible input from stdin Selecting target nodes:
-w NODES nodes where to run the command
-x EXCLUDE exclude nodes from the node list
-a, --all run command on all nodes
-g GROUP, --group=GROUP
run command on a group of nodes
-X EXGROUP exclude nodes from this group Output behaviour:
-q, --quiet be quiet, print essential output only
-v, --verbose be verbose, print informative messages
-d, --debug output more messages for debugging purpose
-G, --groupbase do not display group source prefix
-L disable header block and order output by nodes
-N disable labeling of command line
-b, --dshbak gather nodes with same output
-B like -b but including standard error
-r, --regroup fold nodeset using node groups
-S return the largest of command return codes
--color=WHENCOLOR whether to use ANSI colors (never, always or auto) File copying:
-c, --copy copy local file or directory to remote nodes
--rcopy copy file or directory from remote nodes
--dest=DEST_PATH destination file or directory on the nodes
-p preserve modification times and modes Ssh options:
-f FANOUT, --fanout=FANOUT
use a specified fanout
-l USER, --user=USER
execute remote command as user
-o OPTIONS, --options=OPTIONS
can be used to give ssh options
-t CONNECT_TIMEOUT, --connect_timeout=CONNECT_TIMEOUT
limit time to connect to a node
-u COMMAND_TIMEOUT, --command_timeout=COMMAND_TIMEOUT
limit time for command to run on the node |
