深度分析puppet自带filebucket的备份恢复功能

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日常情况下都是通过puppetmaster端进行推送变更，推送可以用MC实现，至于变更的回滚可以通过SVN活该Git辅助实现。
存在这样一种情况，在一个复杂的环境中，存在多个管理员，而你是负责变更推送的，他们只是做应用的，很多时候是需要登录系统权限的，有一次，一个管理员为了满足他的应用并没有告知给你，登录到系统之后，修改了一个配置文件，完后也没有保存，而这个配置文件恰恰是你这边puppetmaster管理的配置文件，在你做puppet推送之后，那个管理员的配置文件被还原了。而那个管理员发现应用出了问题，要求你给他还原，你如何做呢？

答案是可以通过filebucket功能完成，那么那么多机器，如何集中管理这些单版本呢。

1、首先定义filebucket模块

要求所有节点都将被修改的配置文件保存至本地的/puppet/version/hosts/${fact_certname}，其中变量fact_cartname为获取的certname名自定义的fact变量，如何自定义fact可参考http://kisskisspuppet.com/2013/11/15/my-fact/

[root@linuxmaster1poc manifests]# cat site.pp import 'nodes/*.pp' $puppetserver = ‘puppetmaster.kisspuppet.com’ filebucket { ‘main’: path => "/puppet/version/hosts/${fact_certname}", }

备注：有以上模块之后，只要在file模块中添加backup => 'main',，那么这个文件就会被保存到以上目录中。

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2、定义clientbucketdir和bucketdir

参数clientbucketdir为当file模块中没有定义backup => 'main',时被保存的路径，默认在/var/lib/puppet/clientbucket

参数bucketdir为使用puppet filebucket backup [file]保存的路径

[root@linux57poc ~]# cat /etc/puppet/puppet.conf [main] user = puppet group = puppet vardir = /var/lib/puppet logdir = /var/log/puppet rundir = /var/run/puppet ssldir = $vardir/ssl pluginsync = true clientbucketdir = /puppet/version/hosts/puppet_linux57poc.kisspuppet.com bucketdir = /puppet/version/hosts/puppet_linux57poc.kisspuppet.com [agent] server = puppetmaster.kisspuppet.com classfile = $vardir/classes.txt localconfig = $vardir/localconfig runinterval=86400 report = true authconfig = /etc/puppet/namespaceauth.conf usecacheonfailure = false certname = puppet_linux57poc.kisspuppet.com environment = production # listen = true # puppetport = 8139 # bindaddress = 192.168.100.125

3、file模块中添加 backup => 'main',

class puppet_linux57poc{ include puppet_linux57poc::motd,puppet_linux57poc::facts } class puppet_linux57poc::motd{ package{ setup: ensure => present, } file{ "/etc/motd": owner => "root", group => "root", mode => 0400, content => template("puppet_linux57poc/motd.erb"), backup => 'main', require => Package["setup"], } } class puppet_linux57poc::facts{ file{ "/etc/mcollective/facts.txt": owner => "root", group => "root", mode => 0400, content => template("puppet_linux57poc/facts.txt.erb"), backup => 'main', } }

4、测试filebucket的恢复功能

修改节点被管理的配置文件/etc/motd,然后运行puppet命令还原

[root@linux57poc ~]# echo aa>>/etc/motd [root@linux57poc ~]# puppet agent -t info: Retrieving plugin info: Loading facts in /var/lib/puppet/lib/facter/fact_apply.rb info: Caching catalog for puppet_linux57poc.kisspuppet.com info: Applying configuration version '1386061716' notice: /Stage[main]/Mcollective::Facter/File[/etc/mcollective/facts.yaml]/content: --- /etc/mcollective/facts.yaml 2013-12-03 17:26:35.000000000 +0800 +++ /tmp/puppet-file20131203-14159-i1qgrq-0 2013-12-03 17:56:59.000000000 +0800 @@ -1,89 +1,89 @@ 。。。 info: FileBucket adding {md5}3997ee041b3277fda12dbd849fac47e7 info: /Stage[main]/Mcollective::Facter/File[/etc/mcollective/facts.yaml]: Filebucketed /etc/mcollective/facts.yaml to main with sum 3997ee041b3277fda12dbd849fac47e7 notice: /Stage[main]/Puppet_linux57poc::Motd/File[/etc/motd]/content: --- /etc/motd 2013-12-03 17:56:49.000000000 +0800 +++ /tmp/puppet-file20131203-14159-1c90psx-0 2013-12-03 17:56:59.000000000 +0800 @@ -7,4 +7,3 @@ rubyversion = 1.8.7 .................... ------------------------------------------------ -aa info: FileBucket adding {md5}6db65f0eb756ee96ef8e615e914fa0ee info: /Stage[main]/Puppet_linux57poc::Motd/File[/etc/motd]: Filebucketed /etc/motd to main with sum 6db65f0eb756ee96ef8e615e914fa0ee notice: /Stage[main]/Puppet_linux57poc::Motd/File[/etc/motd]/content: content changed '{md5}6db65f0eb756ee96ef8e615e914fa0ee' to '{md5}7c6613a110541a050c8a8f51fc89dab2' notice: Finished catalog run in 0.69 seconds

可以看到/etc/motd的MD5值从'6db65f0eb756ee96ef8e615e914fa0ee'变成'7c6613a110541a050c8a8f51fc89dab2'

[root@linux57poc ~]# ll /puppet/version/hosts/puppet_linux57poc.kisspuppet.com/6/d/b/6/5/f/0/e/6db65f0eb756ee96ef8e615e914fa0ee/ total 8 -r--r----- 1 nfsnobody nfsnobody 311 Dec 3 17:56 contents -rw-r----- 1 nfsnobody nfsnobody 10 Dec 3 17:56 paths

通过puppet filebucket恢复

[root@linux57poc ~]# puppet filebucket --local backup /etc/motd /etc/motd: 6db65f0eb756ee96ef8e615e914fa0ee [root@linux57poc ~]# ll /puppet/version/hosts/puppet_linux57poc.kisspuppet.com/6/d/b/6/5/f/0/e/6db65f0eb756ee96ef8e615e914fa0ee/ total 8 -r--r----- 1 nfsnobody nfsnobody 311 Dec 3 17:56 contents -rw-r----- 1 nfsnobody nfsnobody 10 Dec 3 17:56 paths [root@linux57poc ~]# [root@linux57poc ~]# >/etc/motd [root@linux57poc ~]# puppet filebucket --local restore /etc/motd 6db65f0eb756ee96ef8e615e914fa0ee [root@linux57poc ~]# cat /etc/motd ------------a few of facter values------------- myhostname = linux57poc eth0_ip = 192.168.100.125 kernel = 2.6.18-274.el5 system release = Red Hat Enterprise Linux Server release 5.7 (Tikanga) puppetversion = 2.7.23 rubyversion = 1.8.7 .................... ------------------------------------------------ aa [root@linux57poc ~]#

如何集中管理呢，可以将所有节点那个目录挂在到一台服务器上，这样就集中了，然后可以通过扫描命令进行查看

[root@linuxreportpoc ~]# ll /puppet/version/hosts total 12 drwxr-x--- 12 nfsnobody nfsnobody 4096 Dec 3 17:56 puppet_linux57poc.kisspuppet.com drwxr-x--- 10 nfsnobody nfsnobody 4096 Dec 3 17:08 puppet_linux58poc.kisspuppet.com drwxr-x--- 11 nfsnobody nfsnobody 4096 Dec 3 17:09 puppet_linux64poc.kisspuppet.com