标签:自动化运维 puppet class template
一、模板的应用
到目前为止,资源申报、定义类、声明类等所有功能都只能一个manifest文件中实现,但这却非有效的基于puppet管理IT资源架构的方式。实践中,一般需要把manifest文件分解成易于理解的结构,例如将类文件、配置文件甚至包括后面讲提到的模板文件等分类存放,并且通过某种机制在必要时将他们整合起来。这种机制即成为“模板”,它有助于结构化、层次化的方式使用puppet,而puppet则基于“模块自动装载器”完成模块装载
从另一个角度来说,模板实际上就是一个按约定的、预定义的机构存放了多个文件或子目录的目录,目录里的这些文件或子目录必须遵循其命名规范。puppet会按照这种规范在特定位置查找所需的模块文件,不过,这些特定目录页可以通过puppet的配置参数modulepath定义
只要在某模块中定于了一个类,就可以在任何manifest文件中使用它,puppet会自动去查找并装载包含了这个类的定义的manifest文件任意使用它们。于是,基于模块机制的puppet的主manifest文件就可以变得很小,也更易懂并能基于策略进行定制
模块目录的结构
在puppet中,模块本身用一个目录来表示,其需要存放于puppet的modulepath参数所定义的目录中,如/etc/puppet/modules。模块目录名称必须与模块名称相同,需要遵循特定的组织结构
MODULE NAME
manifests
init.pp
files
templates
lib
tests
spec
MODULE NAME:模块名称,也即模块目录名称:模块只能以小写字母开头,可以包含小写字母、数字和下划线,但不能使用“main”和“settings”作为模块名
manifests目录:包含当前模块的所有manifest文件:每个manifest文件包含了一个类或一个定义的类型,此文件访问路径格式为“Modulename::[SubDirectoryName::]ManifestFileName”。
init.pp:只能包含一个单独的类定义,且类的名称必须与模块名称相同
files目录:包含了一组静态的文件,这些文件可被站点下载使用:每个文件的访问路径都遵循puppet:///modules/MODELE_NAME/filename路径格式
lib目录:插件目录,常用于自定义fact及自定义资源类型等
templates目录:存储了manifest用到的模板文件,其访问路径遵循template(‘ModulesName/TemplateName’)格式,后缀名应该为.erb,关于模板文件详细信息,后文有介绍
tests目录:当前模板的使用帮助或使用范例文件,类似如何声明当前模板中的类及定义的类型等
spec目录:类似于tests目录的功能,只不过,其是为lib目录定义的各插件提供使用范例的
[root@node1 ~]# mkdir -p /etc/puppet/modules/nginx/{manifests,files,templates,lib} [root@node1 ~]# cd /etc/puppet/modules/nginx/ [root@node1 nginx]# cd manifests/ [root@node1 manifests]# vi init.pp class nginx { package {‘nginx‘: ensure => installed, name => nginx, } } [root@node1 manifests]# vi web.pp class nginx::web inherits nginx { service {‘nginx‘: ensure => true, enable => true, name => nginx, require => Package[‘nginx‘], } file{‘web.conf‘: ensure =>file, source => "puppet:///modules/nginx/web.conf", path => ‘/etc/nginx/nginx.conf‘, notify => Service[‘nginx‘], require => Package[‘nginx‘] } } [root@node1 manifests]# puppet apply -e ‘include nginx::web‘ notice: /Stage[main]/Nginx/Package[nginx]/ensure: created notice: /Stage[main]/Nginx::Web/File[web.conf]/content: content changed ‘{md5}d9dfc198c249bb4ac341198a752b9458‘ to ‘{md5}33d2119b71f717ef4b981e9364530a39‘ notice: /Stage[main]/Nginx::Web/Service[nginx]/ensure: ensure changed ‘stopped‘ to ‘running‘ notice: Finished catalog run in 8.07 seconds [root@node1 manifests]# grep work /etc/nginx/nginx.conf worker_processes 2;
准备nginx配置文件,并有意修改nginx的配置文件
[root@node1 ~]# cp /etc/nginx/nginx.conf /etc/puppet/modules/nginx/files/web.conf [root@node1 ~]# grep worker_processes /etc/puppet/modules/nginx/files/web.conf worker_processes 2;
可以看到我们的配置执行成功
使用模板配置文件
语法:<%= Ruby Expression %>:替代为表达式的值,在使用表达式时应该使用@引用
<% ruby code %>:仅执行代码,不做任何替换,常用于条件判断或循环语句、设定变量以及在输出之前对数据进行处理
<%# commit %>:注释信息
<%%: 输出<%
%%>:输出%>
如上面的案例,在使用模板后
[root@node1 manifests]# cp /etc/puppet/modules/nginx/files/web.conf /etc/puppet/modules/nginx/templates/conf.erb [root@node1 manifests]# grep work /etc/puppet/modules/nginx/templates/conf.erb worker_processes <%= @processorcount %>; 表示nginx的线程数按照cpu的个数来启动 类应该改为如下所示 class nginx::web inherits nginx { service {‘nginx‘: ensure => true, enable => true, name => nginx, require => Package[‘nginx‘], } file{‘web.conf‘: ensure =>file, content =>template(‘nginx/conf.erb‘), path => ‘/etc/nginx/nginx.conf‘, notify => Service[‘nginx‘], require => Package[‘nginx‘] } } [root@node1 manifests]# puppet apply -e ‘include nginx::web‘ notice: /Stage[main]/Nginx/Package[nginx]/ensure: created notice: /Stage[main]/Nginx::Web/Service[nginx]/ensure: ensure changed ‘stopped‘ to ‘running‘ notice: Finished catalog run in 8.25 seconds [root@node1 manifests]# grep work /etc/nginx/nginx.conf worker_processes 1;
二、master/agent
应用场景:
统一资源管理软件
统一配置系统优化参数
定期检测服务器是否运行
主机上的软件配置合理的属性
1.安装
前提:配置实用epel的yum源,而后使用yum命令安装即可
环境规划
192.168.1.201 puppet-server端
192.168.1.202 puppet-agent端
安装部署puppet服务器端
[root@node1 manifests]# yum install puppet-server
安装部署puppet客户端
[root@node2 ~]# yum install puppet -y
2.解析双方主机
解析双方主机,可以使用DNS和hosts文件,由于本处实验的缘故,故使用的为/etc/hosts文件来解析双方主机
建议的主机命名方式:
角色名-运营商-机房名-机器ip.域名
[root@node1 manifests]# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 172.16.0.1 server.magelinux.com server 192.168.1.201 node1.wangfeng7399.com node1 192.168.1.202 node2.wangfeng7399.com node2 192.168.1.203 node3.wangfeng7399.com node3 192.168.1.204 node4.wangfeng7399.com node4
3.启动
1)启动puppet服务器端
收起启动puppet守护进程时,其会自动进行运行环境的初始化,例如创建一个本地CA及服务器端相关的证书和密钥等。初始化操作完成后,puppet就会监听指定的套接字并等待客户端的连接请求。默认情况下,其证书和密钥等文件位于/var/lib/puppet/ssl目录中
出于调试的目的,建议首次启动puppet服务进程可以以非守护进程方式进行,并让其输出详细信息以便于观察初始化过程,如下所示,其逐步展示了创建本地主叫向CA申请证书、获得证书以及CA移除证书签署请求的过程等,而后启动服务进程并准备接受各agent端的连接请求
[root@node1 manifests]# puppet master --no-daemonize --debug [root@node1 manifests]# puppet master --no-daemonize --debug debug: Failed to load library ‘rubygems‘ for feature ‘rubygems‘ debug: Puppet::Type::User::ProviderDirectoryservice: file /usr/bin/dscl does not exist debug: Puppet::Type::User::ProviderPw: file pw does not exist debug: Puppet::Type::User::ProviderUser_role_add: file roledel does not exist debug: Puppet::Type::User::ProviderLdap: true value when expecting false debug: /File[/var/lib/puppet/facts]: Autorequiring File[/var/lib/puppet] debug: /File[/var/lib/puppet/ssl/certs/ca.pem]: Autorequiring File[/var/lib/puppet/ssl/certs] debug: /File[/etc/puppet/manifests]: Autorequiring File[/etc/puppet] debug: /File[/var/lib/puppet/bucket]: Autorequiring File[/var/lib/puppet] debug: /File[/var/lib/puppet/ssl/private_keys/node1.wangfeng7399.com.pem]: Autorequiring File[/var/lib/puppet/ssl/private_keys] debug: /File[/var/lib/puppet/ssl/private_keys]: Autorequiring File[/var/lib/puppet/ssl] debug: /File[/var/lib/puppet/server_data]: Autorequiring File[/var/lib/puppet] debug: /File[/var/lib/puppet/rrd]: Autorequiring File[/var/lib/puppet] debug: /File[/etc/puppet/puppet.conf]: Autorequiring File[/etc/puppet] debug: /File[/var/lib/puppet/ssl/crl.pem]: Autorequiring File[/var/lib/puppet/ssl] debug: /File[/etc/puppet/auth.conf]: Autorequiring File[/etc/puppet] debug: /File[/var/lib/puppet/ssl/private]: Autorequiring File[/var/lib/puppet/ssl] debug: /File[/var/lib/puppet/ssl/public_keys/node1.wangfeng7399.com.pem]: Autorequiring File[/var/lib/puppet/ssl/public_keys] debug: /File[/etc/puppet/fileserver.conf]: Autorequiring File[/etc/puppet] debug: /File[/var/lib/puppet/ssl/certs/node1.wangfeng7399.com.pem]: Autorequiring File[/var/lib/puppet/ssl/certs] debug: /File[/var/lib/puppet/yaml]: Autorequiring File[/var/lib/puppet] debug: /File[/var/lib/puppet/state]: Autorequiring File[/var/lib/puppet] debug: /File[/var/lib/puppet/lib]: Autorequiring File[/var/lib/puppet] debug: /File[/var/lib/puppet/ssl]: Autorequiring File[/var/lib/puppet] debug: /File[/var/log/puppet/masterhttp.log]: Autorequiring File[/var/log/puppet] debug: /File[/var/lib/puppet/ssl/certificate_requests]: Autorequiring File[/var/lib/puppet/ssl] debug: /File[/var/lib/puppet/ssl/certs]: Autorequiring File[/var/lib/puppet/ssl] debug: /File[/var/lib/puppet/reports]: Autorequiring File[/var/lib/puppet] debug: /File[/var/lib/puppet/ssl/public_keys]: Autorequiring File[/var/lib/puppet/ssl] debug: /File[/var/lib/puppet/ssl/public_keys/node1.wangfeng7399.com.pem]/mode: mode changed ‘0640‘ to ‘0644‘ debug: /File[/var/lib/puppet/ssl/private_keys/node1.wangfeng7399.com.pem]/mode: mode changed ‘0640‘ to ‘0600‘ debug: /File[/var/lib/puppet/ssl/certs/node1.wangfeng7399.com.pem]/mode: mode changed ‘0640‘ to ‘0644‘ debug: Finishing transaction 70240930059560 debug: /File[/var/lib/puppet/ssl/ca/serial]: Autorequiring File[/var/lib/puppet/ssl/ca] debug: /File[/var/lib/puppet/ssl/ca/inventory.txt]: Autorequiring File[/var/lib/puppet/ssl/ca] debug: /File[/var/lib/puppet/ssl/ca/private]: Autorequiring File[/var/lib/puppet/ssl/ca] debug: /File[/var/lib/puppet/ssl/ca/private/ca.pass]: Autorequiring File[/var/lib/puppet/ssl/ca/private] debug: /File[/var/lib/puppet/ssl/ca/signed]: Autorequiring File[/var/lib/puppet/ssl/ca] debug: /File[/var/lib/puppet/ssl/ca/requests]: Autorequiring File[/var/lib/puppet/ssl/ca] debug: /File[/var/lib/puppet/ssl/ca/ca_key.pem]: Autorequiring File[/var/lib/puppet/ssl/ca] debug: /File[/var/lib/puppet/ssl/ca/ca_pub.pem]: Autorequiring File[/var/lib/puppet/ssl/ca] debug: /File[/var/lib/puppet/ssl/ca/ca_crt.pem]: Autorequiring File[/var/lib/puppet/ssl/ca] debug: /File[/var/lib/puppet/ssl/ca/ca_crl.pem]: Autorequiring File[/var/lib/puppet/ssl/ca] debug: /File[/var/lib/puppet/ssl/ca/ca_crt.pem]/mode: mode changed ‘0640‘ to ‘0660‘ debug: /File[/var/lib/puppet/ssl/ca/ca_crl.pem]/mode: mode changed ‘0644‘ to ‘0664‘ debug: /File[/var/lib/puppet/ssl/ca/ca_key.pem]/mode: mode changed ‘0640‘ to ‘0660‘ debug: /File[/var/lib/puppet/ssl/ca/private/ca.pass]/mode: mode changed ‘0640‘ to ‘0660‘ debug: Finishing transaction 70240928434340 debug: Using cached certificate for ca debug: Using cached certificate for ca debug: Using cached certificate for node1.wangfeng7399.com notice: Starting Puppet master version 2.7.25
使用puppet master --genconfig可以查看服务器端的配置信息,建议将其输出到/etc/puppet/puppet.conf中
[root@node1 ~]# puppet master --genconfig >> /etc/puppet/puppet.conf
注意:如果此前曾以其主机名或各种原因启动过puppet客户端过程并完成过初始化,其证书文件将无法符合本次启动的需要:此时,需要先情况/var/lib/puppet/ssl目录方可完成后续的初始化操作
如上述的测试启动没有问题,可终止当前的启动后将其以守护进程方式启动
[root@node1 ~]# service puppetmaster start Starting puppetmaster: [ OK ] [root@node1 ~]# chkconfig puppetmaster on
2)启动puppet客户端
puppet agent在首次启动时,会想起指定的puppet server申请证书,并完成后续连接请求,同样的理由,处于测试的目的,接入当前puppet集群中的首个agent节点可以以非守护进程的方式运行,以观察其初始化过程
[root@node2 ~]# puppet agent --server=node1.wangfeng7399.com --no-daemonize --debug info: Creating a new SSL key for node2.wangfeng7399.com info: Caching certificate for ca info: Creating a new SSL certificate request for node2.wangfeng7399.com info: Certificate Request fingerprint (md5): BC:B2:36:9F:B5:78:CD:60:1E:72:9A:D5:88:DE:4B:57
此时,在puppet服务器端使用puppet cert命令管理客户端的证书请求,其--list选项能够查看等待签署证书的客户端列表,而--sign选项可用于为指定节点签署证书,如果要一次性地多个节点证书申请进行签署可以使用--all选项
[root@node1 ~]# puppet cert --list "node2.wangfeng7399.com" (BC:B2:36:9F:B5:78:CD:60:1E:72:9A:D5:88:DE:4B:57) [root@node1 ~]# puppet cert --sign node2.wangfeng7399.com notice: Signed certificate request for node2.wangfeng7399.com notice: Removing file Puppet::SSL::CertificateRequest node2.wangfeng7399.com at ‘/var/lib/puppet/ssl/ca/requests/node2.wangfeng7399.com.pem‘
一旦agent节点收到签署过的证书,其将会显示如下信息
info: Caching certificate for node2.wangfeng7399.com notice: Starting Puppet client version 2.7.25
确保上述agent相关操作不存在问题后,便可以将--server选项指定的信息存储与agent的配置文件中,并以服务的方式启动puppet agent了。其配置文件为/etc/puppet/puppet.conf,配置完整既可以期待能够puppet
[root@node2 ~]# echo "server=node1.wangfeng7399.com" >> /etc/puppet/puppet.conf [root@node2 ~]# service puppet start Starting puppet: [ OK ] [root@node2 ~]# chkconfig puppet on
4.授权访问
在puppet服务器端的/etc/puppet/manifests/中创建site.pp,在master/agent时,所有节点清单文件入口文件为site.pp
node node2.wangfeng7399.com { incldue nginx::web }
建议:一类节点使用一个清单文件,所有清单文件都在site.pp中使用improt包含进来,清单文件修改后应重启文件
5.自动签发证书
可以设置master自动签发所有的证书,我们只需要在/etc/puppet目录下创建autosign.conf文件即可
[root@node1 ~]# echo "*.wangfeng7399.com" > /etc/puppet/autosign.conf
这样就会对所有来自magedu.conf的机器的请求自动签署证书
6.puppet kick功能实现
puppet客户端默认每30分钟很服务器通讯一次,但是有时,我们希望服务器能够给客户端紧急推送一些人物,于是就有了puppet kick(puppet 2.6以前叫puppetrun)
1)编辑客户端配置文件/etc/puppet/puppet.conf在[agent]端中添加如下
[root@node2 ~]# echo "listen=true" >> /etc/puppet/puppet.conf [root@node2 puppet]# ss -tnl State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 5 *:8139 *:*
2)在客户端编辑或创建新文件/etc/puppet/namespaceauth.conf,包含下面内容
[puppetrunner] allow *.wangfeng7399.com
3)在客户端编辑文件auth.conf,添加如下内容
path /run method save auth any allow *.wangfeng7399.com
4)推送方法,在服务器端运行命令
[root@node1 puppet]# puppet kick -p 10 node2.wangfeng7399.com Triggering node2.wangfeng7399.com Getting status status is success node2.wangfeng7399.com finished with exit code 0 Finished
查看node2
[root@node2 puppet]# rpm -q nginx nginx-1.0.15-5.el6.x86_64 [root@node2 puppet]# grep work /etc/nginx/nginx.conf worker_processes 1;
错误信息,惨痛的教训,客户端一致在报这个错误
err: Could not retrieve catalog from remote server: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed: [certificate is not yet valid for /CN=Puppet CA: node1.wangfeng7399.com] warning: Not using cache on failed catalog err: Could not retrieve catalog; skipping run debug: report supports formats: b64_zlib_yaml pson raw yaml; using pson err: Could not send report: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed: [certificate is not yet valid for /CN=Puppet CA: node1.wangfeng7399.com]
解决方法:
两台服务器需要时间同步
7.安装配置puppet-dashboard
1)安装
[root@node1 puppet]# rpm -ivh http://yum.puppetlabs.com/puppetlabs-release-el-6.noarch.rpm //安装官方通过的yum仓库 [root@node1 puppet]# yum install puppet-dashboard -y [root@node1 puppet]# yum install mysql-server mysql -y
2)数据库授权
mysql> create database dashboard character set utf8; Query OK, 1 row affected (0.00 sec) mysql> grant all on dashboard.* to ‘dbuser‘@‘192.168.1.%‘ identified by ‘wangfeng7399‘; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec)
3)修改配置文件,dashboard的配置文件为/usr/share/puppet-dashboard/config/database.yml,修改如下参数
production: host:192.168.1.201 database: dashboard username: dbuser password:wangfeng7399 encoding: utf8 adapter: mysql
为dashboard导入依赖的数据表
[root@node1 config]# gem install rake [root@node1 puppet]# cd /usr/share/puppet-dashboard/config [root@node1 config]# rake gems::refresh_specs [root@node1 config]# rake RAILS_ENV=production db:migrate
启动服务
[root@node1 config]# service puppet-dashboard start Starting Puppet Dashboard: => Booting WEBrick => Rails 2.3.17 application starting on http://0.0.0.0:3000 [ OK ]
4)配置puppet服务器和客户端
服务器端配置
在puppetmaster的配置文件中添加如下内容
reports = store, http reporturl = http://192.168.1.201:3000/reports/upload 在[master]中添加
客户端配置
report=true 在[agent]中添加
配置完成后重启puppet
5)测试
还可以在页面中添加节点和类文件
终于完成了,一个时间不同步弄了2小时才找出错误。
本文出自 “IT民工--小枫” 博客,请务必保留此出处http://wangfeng7399.blog.51cto.com/3518031/1413038
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标签:自动化运维 puppet class template
原文地址:http://wangfeng7399.blog.51cto.com/3518031/1413038