mcollective插件（shell plugins）功能在Linux系统上无所不能

最新推荐文章于 2025-08-08 08:33:45 发布

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最新推荐文章于 2025-08-08 08:33:45 发布

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文章标签： shell 操作系统 json

原文链接：https://yq.aliyun.com/articles/408797

本文介绍如何使用 MCollective 的 shell 插件进行远程命令执行，包括插件安装、验证加载状态及执行具体命令等关键步骤，并强调了使用该插件的安全注意事项。

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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): y

Discovering hosts using the mc method for 2 second(s) .... 3
Host: linux58poc

Statuscode: 0
Output:

puppet:x:52:52:Puppet:/var/lib/puppet:/sbin/nologin
Host: linux64poc

Statuscode: 0
Output:

puppet:x:52:52:Puppet:/var/lib/puppet:/sbin/nologin
Host: linux57poc

Statuscode: 0
Output:

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 linux57poc

Inventory 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 --help
MCollective Distributed Shell
Usage:   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 screen
Common 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 address
Host 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 identity

The 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): y

Discovering hosts using the mc method for 2 second(s) .... 3
Host: linux58poc

Statuscode: 0
Output:

 02:45:02 up 21:10,  2 users,  load average: 0.00, 0.00, 0.00
Host: linux64poc

Statuscode: 0
Output:

 02:45:02 up 20:59,  1 user,  load average: 0.00, 0.00, 0.00
Host: linux57poc

Statuscode: 0
Output:

 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): y

Discovering hosts using the mc method for 2 second(s) .... 3
Host: linux58poc

Statuscode: 0
Output:

puppet:x:52:52:Puppet:/var/lib/puppet:/sbin/nologin
Host: linux64poc

Statuscode: 0
Output:

puppet:x:52:52:Puppet:/var/lib/puppet:/sbin/nologin
Host: linux57poc

Statuscode: 0
Output:

puppet:x:52:52:Puppet:/var/lib/puppet:/sbin/nologin