Polysh命令实现多日志查询的方法示例

一、Polysh简介

Polysh 是一个交互式命令，可以在一台服务器上批量的对一批服务器进行处理，运行交互式命令。Polysh可以同时登录多个远程主机，而不需要通过relay一台一台的登录，并执行相同的指令，方便了问题的排查和定位，大大减少了我们的工作量。

Polysh is a tool to aggregate several remote shells into one. It is used to launch an interactive remote shell on many machines at once. It is written in Python and requires Python ≥ 2.4.

注： 官方解释：Polysh 是一个由几个远程脚本集合而成的工具，它被用于在许多服务器上运行一个交互式的远程脚本，由 Python 编写，最低要求为 Python 2.4 。

二、polysh安装

通过relay登录staging机器，执行如下命令安装polysh。安装目录为用户目录： /opt/hl/。

1.已安装python的安装

wget wget http://guichaz.free.fr/polysh/files/polysh-0.4.tar.gz
tar -zxvf polysh-0.4.tar.gz

vim prod-polysh.sh

脚本内容如下：

#10.252.176.33,10.252.176.35是你要链接的机器ip
python /opt/hl/polysh-0.4/polysh.py {10.252.176.33,10.252.176.35}

开放给其他用户可执行的权限

chmod 777 prod-polysh.sh

2.未安装python的安装

wget wget http://guichaz.free.fr/polysh/files/polysh-0.4.tar.gz
tar -zxvf polysh-0.4.tar.gz
cd polysh-0.4
su
python setup.py install

vim prod-polysh.sh

脚本内容如下：

#10.252.176.33,10.252.176.35是你要链接的机器ip
python /opt/hl/polysh-0.4/polysh.py {10.252.176.33,10.252.176.35}

开放给其他用户可执行的权限

chmod 777 prod-polysh.sh

三、Xshell配置Xagent（mac可跳过这一步）

打开文件-属性，选择SSH选项，选择”使用密码处理的Xagent(SSH代理)”。然后将Xshell重启。

四、polysh使用

4.1.使用方法一

polysh 10.252.176.33 10.252.176.35

4.2.使用方法二

./prod-polysh.sh

则会出现如下提示信息

[---hl-----]$ ./prod-polysh.sh
ready (8)

ready (8) 表示 8台机器已经连接完毕，可以执行查询命令。exit或Crtl+z都可以退出。

4.3.执行命令

ready (8)>cd /opt/hl
ready (8)>pwd

显示如下：

10.252.176.33: /opt/hl
10.252.176.35 : /opt/hl

五、源码

可以通过git获取polysh的源码

git clone git://repo.or.cz/polysh.git

六、其他

以冒号开头的指令不会发送到远程主机，polysh会执行以冒号开头的指令，例如:

ready (2)> :help
:add Add one or many remote shells.
:chdir Change the current directory of polysh (not the remote shells).
:disable Disable sending commands to remote shells.
:enable Enable sending commands to remote shells.
:export_vars Export some environment variables on enabled remote shells.
:help List control commands or show their documentations.
:hide_password Do not echo the next typed line.
:list List remote shells and their states.
:purge Delete disabled remote shells.
:quit Quit polysh.
:reconnect Try to reconnect to disconnected remote shells.
:rename Rename all enabled remote shells with the argument.
:replicate Copy a path from one remote shell to all others
:reset_prompt Change the prompt to be recognized by polysh.
:send_ctrl Send a control character to remote shells.
:set_debug Enable or disable debugging output for remote shells.
:set_log Duplicate every console I/O into the given local file.
:show_read_buffer Print the data read by remote shells.
:upload Upload the specified local path to enabled remote shells.

来源：http://www.jianshu.com/p/2ed0ad5ccb3f