一步一步学会puppet(四)--master/agent模型
这篇博文主要介绍puppet在实际生产环境下的master/agent模型的使用；===================================================================
1 原理介绍
1.1 原理图
1.2 详细说明
2 配置实例
2.0 准备
2.1 master配置
2.2 agent配置
2.3 master签署证书
2.4 agent一次完整的同步案例
===================================================================
1 原理介绍
1.1 原理图
1.2 详细说明
[*]puppet agent通常运行为一个服务进程，其默认每隔半个小时向master发出一次连接请求；
[*]puppet agent并不直接访问任何manifest，而是向master请求一个预编译的catalog文件；
[*]puppet master会为发出请求的agent读取一个名为“site manifest”的特殊manifest文件，并基于此编译一个catalog后发送给agent；
[*]puppet agent在获取到catalog后应用于本地；
[*]因此，基于此种工作架构，仅在master端提供一个或少量几个manifest即可实现管理大量的节点，并能提供更加安全的工作过程；
2 配置实例
2.0 准备
puppet利用主机名识别不同的节点，故需保证master和agent的主机名都可解析，生产环境下使用DNS解析，测试环境使用hosts文件即可；
2.1 master配置
yum localinstall facter-1.7.3-1.el6.x86_64.rpm puppet-2.7.25-1.el6.noarch.rpm puppet-server-2.7.25-1.el6.noarch.rpm
# 生成master配置文件：
puppet master --genconfig >> /etc/puppet/puppet.conf
# 启动puppetmaster服务
puppetmasterd -v -d --no-daemonize # 前台测试启动
service puppetmaster start # 正式启动服务
# 服务验证：ss -antupl |grep 8140
2.2 agent配置
# 安装puppet程序包
yum localinstall facter-1.7.3-1.el6.x86_64.rpm puppet-2.7.25-1.el6.noarch.rpm
# 编辑配置文件
vi /ect/puppet/puppet.conf # 在段添加server=Puppetmaster_Hostname，如
server = master.lamp.com
# 启动puppet服务
puppet agent --server mem.lamp.com -v -d --noop --test # 测试启动，不实际应用配置
service puppet start # 正式启动agent服务
chkconfig puppet on # 配置开启启动
2.3 master签署证书
# 手动签发：
puppet cert list # 显示待签发节点的证书请求
puppet cert sign Node_Name # 签署某一agent的请求
puppet cert sign --all # 一次性签署全部请求
# 自动签发：
cat > /ect/puppet/autosign.conf << EOF*.lamp.comEOF# 会对所有来自lamp.com的主机请求都自动签发
# 注：master端的任何修改，都要重新装载puppetmaster服务，即执行如下命令即可
service puppetmaster reload
2.4 agent一次完整的同步案例
# puppet agent -v -t
info: Caching catalog for nginx1.lamp.com
info: Applying configuration version '1400402077'
notice: /Stage/Nginx::Package::Redhat/Package/ensure: created
notice: /Stage/Nginx::Config/File/content:
--- /etc/nginx/nginx.conf 2013-04-27 04:36:51.000000000 +0800
+++ /tmp/puppet-file20140518-5216-1feu0op-0 2014-05-18 16:34:51.566999838 +0800
@@ -1,42 +1,31 @@
-# For more information on configuration, see:
-# * Official English Documentation: http://nginx.org/en/docs/
-# * Official Russian Documentation: http://nginx.org/ru/docs/
-
-user nginx;
-worker_processes1;
+user nginx;
+worker_processes 1;
error_log/var/log/nginx/error.log;
-#error_log/var/log/nginx/error.lognotice;
-#error_log/var/log/nginx/error.loginfo;
-
pid /var/run/nginx.pid;
-
events {
- worker_connections1024;
+worker_connections 1024;
+
}
-
http {
- include /etc/nginx/mime.types;
- default_typeapplication/octet-stream;
+include /etc/nginx/mime.types;
+default_typeapplication/octet-stream;
+
+access_log/var/log/nginx/access.log;
+
+sendfile on;
+
+
+
+keepalive_timeout65;
+tcp_nodelay on;
- log_formatmain'$remote_addr - $remote_user [$time_local] "$request" '
- '$status $body_bytes_sent "$http_referer" '
- '"$http_user_agent" "$http_x_forwarded_for"';
-
- access_log/var/log/nginx/access.logmain;
-
- sendfile on;
- #tcp_nopush on;
-
- #keepalive_timeout0;
- keepalive_timeout65;
-
- #gzipon;
-
- # Load config files from the /etc/nginx/conf.d directory
- # The default server is in conf.d/default.conf
- include /etc/nginx/conf.d/*.conf;
+
+gzip on;
+gzip_disable "MSIE .(?!.*SV1)";
+
+include /etc/nginx/conf.d/*.conf;
}
info: FileBucket got a duplicate file {md5}d9dfc198c249bb4ac341198a752b9458
info: /Stage/Nginx::Config/File: Filebucketed /etc/nginx/nginx.conf to puppet with sum d9dfc198c249bb4ac341198a752b9458
notice: /Stage/Nginx::Config/File/content: content changed '{md5}d9dfc198c249bb4ac341198a752b9458' to '{md5}df69537f815f9aacfe6dd6a439a7ba06'
notice: /Stage/Nginx::Config/File/ensure: defined content as '{md5}530e67c1708924887565ce91f2c5b9f8'
info: Class: Scheduling refresh of Class
info: Class: Scheduling refresh of Service
info: Class: Scheduling refresh of Exec
notice: /Stage/Nginx::Service/Exec: Triggered 'refresh' from 1 events
info: /Stage/Nginx::Service/Exec: Scheduling refresh of Service
notice: /Stage/Nginx::Service/Service/ensure: ensure changed 'stopped' to 'running'
notice: /Stage/Nginx::Service/Service: Triggered 'refresh' from 2 events
notice: Finished catalog run in 5.06 seconds
# 特别注意notice的输出内容，分别完成了nginx程序的安装，配置文件的生成，服务的启动等操作；
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