Puppet运维实战

Puppet扩展篇4-如何扩展master的SSL传输性能（nginx）

描述：puppet使用SSL(https)协议来进行通讯，默认情况下，puppet server端使用基于Ruby的WEBRick HTTP服务器。由于WEBRick HTTP服务器在处理agent端的性能方面并不是很强劲，因此需要扩展puppet，搭建nginx或者其他强劲的web服务器来处理客户的https请求。

需要解决的问题：

扩展传输方式：提高性能并增加Master和agent之间的并发连接数量。
扩展SSL：采用良好的SSL证书管理方法来加密Master和agent之间的通讯。

Nginx+Passenger方式：

1、安装编译nginx所需要的开发包

[root@TKPUPT-M1 ~]# groupadd -g 3001 nginx
[root@TKPUPT-M1 ~]# useradd -u 3001 -g 3001 nginx
[root@TKPUPT-M1 ~]# yum install ruby-devel gcc make pcre-devel zlib-devel openssl-devel pam-devel curl-devel rpm-build

2、安装passenger（将gem软件包copy到本地）

备注：需要先将gem包下载到本地，当然也可以联网安装，会非常慢。

[root@TKPUPT-M1 gem]# gem install --localhost rake rack passenger --no-rdoc --no-ri

3、解压nginx、pcre源码包

[root@TKPUPT-M1 gem]# tar xf pcre-8.32.tar.gz -C /usr/local/src/
[root@TKPUPT-M1 gem]# tar xf nginx-1.4.2.tar.gz -C /usr/local/src/

4、编译并安装nginx

备注：主要是为了将模块passenger-config编译进来。

[root@TKPUPT-M1 ~]# cd /usr/local/src/nginx-1.4.2/
[root@TKPUPT-M1 nginx-1.4.2]# ./configure --user=nginx --group=nginx --prefix=/etc/nginx --with-http_stub_status_module --with-http_ssl_module --with-pcre=/usr/local/src/pcre-8.32 --add-module=`passenger-config --root`/ext/nginx
[root@TKPUPT-M1 nginx-1.4.2]# make && make install

5、与passenger结合

备注：注意config.ru的属主和属组应该为puppet

[root@TKPUPT-M1 nginx-1.4.2]# mkdir  -p /etc/puppet/rack/public
[root@TKPUPT-M1 nginx-1.4.2]# cp /usr/share/puppet/ext/rack/config.ru  /etc/puppet/rack/
[root@TKPUPT-M1 nginx-1.4.2]# chown -R puppet. /etc/puppet/rack/

6、复制启动脚本到

[root@TKPUPT-M1 init.d]# cp /root/gem/nginx /etc/init.d/
[root@TKPUPT-M1 ~]# chmod a+x /etc/init.d/nginx

7、配置nginx

备注：注意和puppet结合的证书名称及路径

[root@TKPUPT-M1 gem]# vim /etc/nginx/conf/nginx.conf
user  nginx nginx;
worker_processes  1;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    passenger_root /usr/lib/ruby/gems/1.8/gems/passenger-4.0.19;
    passenger_ruby /usr/bin/ruby;

    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    keepalive_timeout  65;

    server {
        listen 8140                ssl;
    server_name                puppetmaster;

    passenger_enabled          on;
    passenger_set_cgi_param    HTTP_X_CLIENT_DN $ssl_client_s_dn;
    passenger_set_cgi_param    HTTP_X_CLIENT_VERIFY $ssl_client_verify;
    proxy_buffer_size 4000k;
    proxy_buffering on;
    proxy_buffers 32 1280k;
    proxy_busy_buffers_size 17680k;
    client_max_body_size 10m;
    client_body_buffer_size 4096k;

    access_log /var/log/nginx/puppet_access.log;
    error_log /var/log/nginx/puppet_error.log;

    root /etc/puppet/rack/public;

    ssl off;
    ssl_session_timeout 5m;
    ssl_certificate /var/lib/puppet/ssl/certs/puppetmaster.pem;
    ssl_certificate_key /var/lib/puppet/ssl/private_keys/puppetmaster.pem;
    ssl_client_certificate /var/lib/puppet/ssl/certs/ca.pem;
    ssl_crl /var/lib/puppet/ssl/ca/ca_crl.pem;
    ssl_verify_client optional;

    ssl_ciphers SSLv2:-LOW:-EXPORT:RC4+RSA;
    ssl_prefer_server_ciphers on;
    ssl_verify_depth 1;
    ssl_session_cache shared:SSL:128m;

    # File sections
    location /production/file_content/files/ {
      types { }
      default_type application/x-raw;
      alias /etc/puppet/files/;
  }
 }
}

8、配置puppet.conf

[root@TKPUPT-M1 ~]# vim /etc/puppet/puppet.conf 
[master]
    certname = puppetmaster
    ca       = false
    ssl_client_verify_header = HTTP_X_CLIENT_VERIFY
    ssl_client_header = HTTP_X_CLIENT_DN

8、启动nginx

[root@TKPUPT-M1 gem]# mkdir /var/log/nginx/
[root@TKPUPT-M1 nginx-1.4.2]# /etc/init.d/puppetmaster stop
[root@TKPUPT-M1 nginx-1.4.2]# chkconfig puppetmaster off
[root@TKPUPT-M1 nginx-1.4.2]# /etc/init.d/nginx start
[root@TKPUPT-M1 nginx-1.4.2]# chkconfig nginx on

9、测试

在多个节点发起puppet agent -t命令动作，查看nginx日志看nginx+passenger是否代理成功。

[root@TKPUPT-CA ~]# puppet  agent -t
[root@TKPUPT-M1 ~]# tailf  /var/log/nginx/puppet_access.log

参考：http://projects.puppetlabs.com/projects/1/wiki/Using_Passenger