众所周知，mcollecitve只是一个框架而已，它单独是干不了任何事情的，如果要让他去操作一个平台，是需要插件（plugins）进行操作的，比如通过puppet插件去管理节点puppet的所有命令，通过fact插件去管理fact的所有参数等等，那么如何去管理系统的命令呢，这就需要shell插件。
插件下载地址：https://github.com/kisspuppet/mcollective-plugins，有github客户端的童鞋可直接clonehttps://github.com/kisspuppet/mcollective-plugins.git
更多有关puppet的文章可访问http://kisspuppet.com
1、下载插件放在对应的目录里即可
mcollective-client端
[root@linuxmaster1poc ~]# mco shell "cat /etc/passwd | grep puppet"Do you really want to send this command unfiltered? (y/n): yDiscovering hosts using the mc method for 2 second(s) .... 3Host: linux58pocStatuscode: 0Output:puppet:x:52:52:Puppet:/var/lib/puppet:/sbin/nologinHost: linux64pocStatuscode: 0Output:puppet:x:52:52:Puppet:/var/lib/puppet:/sbin/nologinHost: linux57pocStatuscode: 0Output:puppet:x:52:52:Puppet:/var/lib/puppet:/sbin/nologin
mcollective-server端
[root@linux57poc agent]# ll /usr/libexec/mcollective/mcollective/agent/ | grep shell-rw-r--r-- 1 root root 1017 Aug 6 06:36 shell.ddl-rw-r--r-- 1 root root 862 Aug 6 06:36 shell.rb
备注：mcollective-server端部署完成之后，记得重启mcollective服务。
2、 查看shell插件是否加载成功
从下面可以看出mcollective-client端shell插件已经有了[root@linuxmaster1poc ~]# mco The Marionette Collective version 2.2.4
usage: /usr/bin/mco command options Known commands: completion facts find help inventory ping plugin puppet rpc shell #shell插件加载OK Type '/usr/bin/mco help' for a detailed list of commands and '/usr/bin/mco help command'to get detailed help for a command
从下面可以看出mcollective-server端shell插件也加载了
[root@linuxmaster1poc ~]# mco inventory linux57pocInventory for linux57poc: Server Statistics: Version: 2.2.4 Start Time: Fri Dec 13 01:14:14 +0800 2013 Config File: /etc/mcollective/server.cfg Collectives: mcollective Main Collective: mcollective Process ID: 23898 Total Messages: 10 Messages Passed Filters: 10 Messages Filtered: 0 Expired Messages: 0 Replies Sent: 9 Total Processor Time: 0.73 seconds System Time: 0.17 seconds Agents: discovery puppet rpcutil shell #shell插件加载OK Data Plugins: agent fstat puppet resource Configuration Management Classes: No classes applied Facts: architecture = x86_64 augeasversion = 0.10.0 bios_release_date = 06/22/2012 bios_vendor = Phoenix Technologies LTD bios_version = 6.00 blockdevice_fd0_size = 4096 blockdevice_hdc_size = 3834736640 blockdevice_sda_model = Virtual disk blockdevice_sda_size = 42949672960 。。。
3、通过shell插件执行shell命令
mco shell帮助信息
[root@linuxmaster1poc ~]# mco shell --helpMCollective Distributed ShellUsage: mco shell CMD The CMD is a string EXAMPLES: mco shell uptime --np, --no-progress Do not show the progress bar -1, --one Send request to only one discovered nodes --batch SIZE Do requests in batches --batch-sleep SECONDS Sleep time between batches --limit-seed NUMBER Seed value for deterministic random batching --limit-nodes, --ln, --limit COUNT Send request to only a subset of nodes, can be a percentage -j, --json Produce JSON output --display MODE Influence how results are displayed. One of ok, all or failed -c, --config FILE Load configuratuion from file rather than default -v, --verbose Be verbose -h, --help Display this screenCommon Options -T, --target COLLECTIVE Target messages to a specific sub collective --dt, --discovery-timeout SECONDS Timeout for doing discovery -t, --timeout SECONDS Timeout for calling remote agents -q, --quiet Do not be verbose --ttl TTL Set the message validity period --reply-to TARGET Set a custom target for replies --dm, --disc-method METHOD Which discovery method to use --do, --disc-option OPTION Options to pass to the discovery method --nodes FILE List of nodes to addressHost Filters -W, --with FILTER Combined classes and facts filter -S, --select FILTER Compound filter combining facts and classes -F, --wf, --with-fact fact=val Match hosts with a certain fact -C, --wc, --with-class CLASS Match hosts with a certain config management class -A, --wa, --with-agent AGENT Match hosts with a certain agent -I, --wi, --with-identity IDENT Match hosts with a certain configured identityThe Marionette Collective 2.2.4
显示对端uptime命令负载情况
[root@linuxmaster1poc ~]# mco shell "uptime"Do you really want to send this command unfiltered? (y/n): yDiscovering hosts using the mc method for 2 second(s) .... 3Host: linux58pocStatuscode: 0Output: 02:45:02 up 21:10, 2 users, load average: 0.00, 0.00, 0.00Host: linux64pocStatuscode: 0Output: 02:45:02 up 20:59, 1 user, load average: 0.00, 0.00, 0.00Host: linux57pocStatuscode: 0Output: 02:45:02 up 21:04, 3 users, load average: 0.00, 0.00, 0.00
显示所有节点/etc/password文件中puppet用户哪一行
[root@linuxmaster1poc ~]# mco shell "cat /etc/passwd | grep puppet"Do you really want to send this command unfiltered? (y/n): yDiscovering hosts using the mc method for 2 second(s) .... 3Host: linux58pocStatuscode: 0Output:puppet:x:52:52:Puppet:/var/lib/puppet:/sbin/nologinHost: linux64pocStatuscode: 0Output:puppet:x:52:52:Puppet:/var/lib/puppet:/sbin/nologinHost: linux57pocStatuscode: 0Output:puppet:x:52:52:Puppet:/var/lib/puppet:/sbin/nologin
修改其中一台主机的root密码
备注：更多操作步骤可参考mco shell –help帮助。
警告：基于mcollective的shell插件虽然功能很强大，除了动态显示的命令之外，其它root能操作的，它基本上都能操作。所以操作也非常危险，可根据生产环境实际情况而定。
是清晰的又是朦胧的，是一杯苦茶，最后却品出清雅之香。
