運維人員往往會頭疼，要在10多臺服務器上去執行同樣的操作。
在linux下有一款這樣的工具（pssh），解決了這個問題。
這款工具的幾個主要功能：
pssh 在多個主機上並行地運行命令。
pscp 把文件並行地複製到多個主機上。
prsync 通過 rsync 協議把文件高效地並行複製到多個主機上。
pslurp 把文件並行地從多個遠程主機複製到中心主機上。
pnuke 並行地在多個遠程主機上殺死進程。
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1：安裝
wget http://parallel-ssh.googlecode.com/files/pssh-2.2.2.tar.gz
tar zxvf pssh-2.2.2.tar.gz
cd pssh-2.2.2
python setup.py install
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2.配置密鑰，免密碼訪問管理機器
在使用之前需要配置密鑰訪問，如下:
#ssh-keygen 【回車】
#複製公鑰到遠端服務器
#ssh-copy-id -i .ssh/id_rsa.pub [email protected]
ps.如果端口不是默認22 ，需要使用：ssh-copy-id -i .ssh/id_rsa.pub ”-p 4567 [email protected]”
編輯 服務器列表文件 servers.txt
# vim /home/server.txt
hosts file (each line "[user@]host[:port]")
3：運行第一條命令，查看啓動時間
]# pssh -h servers.txt -l root -P uptime
173.16.0.102: 13:14:57 up 1 day, 2:00, 1 user, load average: 0.00, 0.00, 0.00
173.16.0.100: 13:23:34 up 21:40, 1 user, load average: 0.00, 0.00, 0.00
[1] 13:13:52 [SUCCESS] 173.16.0.102
[2] 13:13:52 [SUCCESS] 173.16.0.100
4：刪除文件
我需要刪除以前yum.repo 文件
pssh -h servers.txt -P "rm -r /etc/yum.repos.d/*.repo"
5：傳輸單個文件
pscp -h servers.txt /etc/yum.repos.d/ftp.repo /etc/yum.repos.d/
6：運行yum update
]# pssh -h servers.txt -l root -P "yum update"
173.16.0.100: Loaded plugins: fastestmirror
173.16.0.102: Loaded plugins: fastestmirror
173.16.0.100: Loading mirror speeds from cached hostfile
173.16.0.102: Loading mirror speeds from cached hostfile
173.16.0.100: Setting up Update Process
173.16.0.102: Setting up Update Process
173.16.0.100: No Packages marked for Update
173.16.0.102: No Packages marked for Update
[1] 13:38:13 [SUCCESS] 173.16.0.100
[2] 13:38:13 [SUCCESS] 173.16.0.102
7：讓機器加載Ext4
]# pssh -h servers.txt -l root -P "modprobe ext4"
[1] 13:49:42 [SUCCESS] 173.16.0.100
[2] 13:49:42 [SUCCESS] 173.16.0.102
8：安裝e4fsprogs, 支持ext4分區
[root@gluster02b ~]# pssh -h servers.txt -l root -P "yum -y install e4fsprogs"
173.16.0.102: Loaded plugins: fastestmirror
173.16.0.100: Loaded plugins: fastestmirror
173.16.0.100: Complete!
[1] 13:53:11 [SUCCESS] 173.16.0.100
173.16.0.102:
Installed:
e4fsprogs.x86_64 0:1.41.12-2.el5
173.16.0.102: Complete!
[2] 13:53:11 [SUCCESS] 173.16.0.102
9：創建一個目錄
# pssh -h servers.txt -l root -P "mkdir /data01"
[1] 09:53:27 [SUCCESS] 173.16.0.100
[2] 09:53:27 [SUCCESS] 173.16.0.102
# pscp -h servers.txt /etc/fstab /etc/
[1] 09:53:51 [SUCCESS] 173.16.0.102
[2] 09:53:51 [SUCCESS] 173.16.0.100
10：複製文件夾到遠程
# pscp -h servers.txt -r /root/tools/ /root/
[1] 10:23:27 [SUCCESS] 173.16.0.100
[2] 10:23:28 [SUCCESS] 173.16.0.102
11：關閉Selinux
# pssh -h servers.txt -l root -P "sed -i '/SELINUX=enforcing/s/SELINUX=enforcing/SELINUX=disabled/' /etc/sysconfig/selinux"
[1] 11:47:15 [SUCCESS] 173.16.0.100
[2] 11:47:15 [SUCCESS] 173.16.0.102
# pssh -h servers.txt -l root -P init 6
[1] 11:47:28 [SUCCESS] 173.16.0.102
[2] 11:47:28 [SUCCESS] 173.16.0.100
# pssh -h servers.txt -l root -P sestatus
[1] 11:49:37 [FAILURE] 173.16.0.100 Exited with error code 255
[2] 11:49:37 [FAILURE] 173.16.0.102 Exited with error code 255
# pssh -h servers.txt -l root -P sestatus
173.16.0.100: SELinux status: disabled
[1] 11:52:32 [SUCCESS] 173.16.0.100
173.16.0.102: SELinux status: disabled
[2] 11:52:32 [SUCCESS] 173.16.0.102
http://sheriy.com/?p=748
http://www.theether.org/pssh/docs/0.2.3/pssh-HOWTO.html