深度分析puppet自带filebucket的备份恢复功能
puppet交流网站 www.kisspuppet.com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/
# 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。
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 保存的路径
# cat /etc/puppet/puppet.conf
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
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
# echo aa>>/etc/motd
# 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/Mcollective::Facter/File/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/Mcollective::Facter/File: Filebucketed /etc/mcollective/facts.yaml to main with sum 3997ee041b3277fda12dbd849fac47e7
notice: /Stage/Puppet_linux57poc::Motd/File/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/Puppet_linux57poc::Motd/File: Filebucketed /etc/motd to main with sum 6db65f0eb756ee96ef8e615e914fa0ee
notice: /Stage/Puppet_linux57poc::Motd/File/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'
# 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 Dec3 17:56 contents
-rw-r----- 1 nfsnobody nfsnobody10 Dec3 17:56 paths
通过puppet filebucket恢复
# puppet filebucket --local backup /etc/motd
/etc/motd: 6db65f0eb756ee96ef8e615e914fa0ee
# 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 Dec3 17:56 contents
-rw-r----- 1 nfsnobody nfsnobody10 Dec3 17:56 paths
#
# >/etc/motd
# puppet filebucket --local restore/etc/motd6db65f0eb756ee96ef8e615e914fa0ee
# cat /etc/motd
------------a few of facter values-------------
myhostname = linux57poc
eth0_ip = 192.168.100.125
kernel = 2.6.18-274.el5
system>
puppetversion = 2.7.23
rubyversion = 1.8.7
....................
------------------------------------------------
aa
#
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
# ll /puppet/version/hosts
total 12
drwxr-x--- 12 nfsnobody nfsnobody 4096 Dec3 17:56 puppet_linux57poc.kisspuppet.com
drwxr-x--- 10 nfsnobody nfsnobody 4096 Dec3 17:08 puppet_linux58poc.kisspuppet.com
drwxr-x--- 11 nfsnobody nfsnobody 4096 Dec3 17:09 puppet_linux64poc.kisspuppet.com
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