puppet 横向扩展(一)

目录

• 1. 概述
• 2. 实验环境
• 3. 实验步骤
  • 3.1. 创建puppetmaster的rack环境
  • 3.2. 配置文件设置
  • 3.3. 补充说明
  • 3.4. 测试配置结果
    • 3.4.1. 默认的负载均衡
    • 3.4.2. 负载均衡情况下, 一台 puppet master 挂了的情况

概述

横向扩展实验之一 – 扩展puppet master 的个数.

实验环境

master 和 node 都是 debian 7.7 i686 系统
2个 puppet master 在一台机器上, 都是 apache 虚拟主机

实验步骤

创建puppetmaster的rack环境

cd /usr/share/puppet/rack

mkdir -p puppetmasterd_18140/{public,tmp}
cp puppetmasterd/config.ru puppetmasterd_18140/
chown puppet puppetmasterd_18140/config.ru

mkdir -p puppetmasterd_18141/{public,tmp}
cp puppetmasterd/config.ru puppetmasterd_18141/
chown puppet puppetmasterd_18141/config.ru

配置文件设置

• passenger.conf : passenger 配置信息
  放在 /etc/apache2/mods-available 中， 并在 /etc/apache2/mods-enabled中建立软连接
  
• puppetmaster_proxy.conf
  关闭 SSL， 重新请求头部， 为后端进程做负载均衡，放在 /etc/apache2/site-available 中， 并在 /etc/apache2/site-enabled中建立软连接
  
• puppetmaster_worker_1.conf
  虚拟主机1， 指向处理puppet请求的Rac目录，放在 /etc/apache2/site-available 中， 并在 /etc/apache2/site-enabled中建立软连接
  
• puppetmaster_worker_2.conf
  虚拟主机2， 指向处理puppet请求的Rac目录，放在 /etc/apache2/site-available 中， 并在 /etc/apache2/site-enabled中建立软连接

各个配置文件的详细内容如下:

$ cat passenger.conf
<IfModule mod_passenger.c>
  PassengerRoot /usr
  PassengerRuby /usr/bin/ruby

  # And the passenger performance tuning settings
  PassengerHighPerformance On
  # Set this to about 1.5 times the number of CPU cores in your master:
  PassengerMaxPoolSize 2
  # Recycle master processes after they service 1000 requests
  PassengerMaxRequests 1000
  # Stop processes if they sit idle for 10 minutes
  PassengerPoolIdleTime 600
</IfModule>

$ cat puppetmaster_proxy.conf
# Available back-end worker virtual hosts
# NOTE the use of cleartext unencrypted HTTP.
<Proxy balancer://puppetmaster>
  BalancerMember http://127.0.0.1:18140
  BalancerMember http://127.0.0.1:18141
</Proxy>

Listen 8140
<VirtualHost *:8140>
  SSLEngine on
  # SSLCipherSuite SSLv2:-LOW:-EXPORT:RC4+RSA
  SSLProtocol ALL +SSLv3 +TLSv1
  SSLCipherSuite ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:-LOW:-SSLv2:-EXP
  #SSLProtocol ALL -SSLv2
  #SSLCipherSuite HIGH:!ADH:RC4+RSA:-MEDIUM:-LOW:-EXP
  # Puppet master should generate initial CA certificate.
  # ensure certs are located in /var/lib/puppet/ssl
  SSLCertificateFile /var/lib/puppet/ssl/certs/master-1.puppet.com.pem
  SSLCertificateKeyFile /var/lib/puppet/ssl/private_keys/master-1.puppet.com.pem
  SSLCertificateChainFile /var/lib/puppet/ssl/ca/ca_crt.pem
  SSLCACertificateFile /var/lib/puppet/ssl/ca/ca_crt.pem
  SSLCARevocationFile /var/lib/puppet/ssl/ca/ca_crl.pem
  # optional to all CSR request, required if certificates distributed to client during provisioning.
  SSLVerifyClient optional
  SSLVerifyDepth 1
  SSLOptions +StdEnvVars

  # The following client headers record authentication information for downstream workers.
  RequestHeader set X-SSL-Subject %{SSL_CLIENT_S_DN}e
  RequestHeader set X-Client-DN %{SSL_CLIENT_S_DN}e
  RequestHeader set X-Client-Verify %{SSL_CLIENT_VERIFY}e

  <Location />
    SetHandler balancer-manager
    Order allow,deny
    Allow from all
  </Location>

  ProxyPass / balancer://puppetmaster/
  ProxyPassReverse / balancer://puppetmaster/
  ProxyPreserveHost On

  # log settings
  ErrorLog /var/log/apache2/balancer_error.log
  CustomLog /var/log/apache2/balancer_access.log combined
  CustomLog /var/log/apache2/balancer_ssl_requests.log "%t %h %{SSL_PROTOCOL}x %{SSL_CIPHER}x \"%r\" %b"

</VirtualHost>

$ cat puppetmaster_worker_1.conf
Listen 18140
<VirtualHost 127.0.0.1:18140>
  SSLEngine off

  # Obtain Authentication Information from Client Request Headers
  SetEnvIf X-Client-Verify "(.*)" SSL_CLIENT_VERIFY=$1
  SetEnvIf X-SSL-Client-DN "(.*)" SSL_CLIENT_S_DN=$1

  PassengerEnabled On
  DocumentRoot /usr/share/puppet/rack/puppetmasterd_18140/public
  <Directory /usr/share/puppet/rack/puppetmasterd_18140>
    Options None
    AllowOverride None
    Order allow,deny
    allow from all
  </Directory>

  # log settings
  ErrorLog /var/log/apache2/puppetmaster_worker_error_1.log
  CustomLog /var/log/apache2/puppetmaster_worker_access_1.log combined

</VirtualHost>

$ cat puppetmaster_worker_2.conf
Listen 18141
<VirtualHost 127.0.0.1:18141>
  SSLEngine off

  # Obtain Authentication Information from Client Request Headers
  SetEnvIf X-Client-Verify "(.*)" SSL_CLIENT_VERIFY=$1
  SetEnvIf X-SSL-Client-DN "(.*)" SSL_CLIENT_S_DN=$1

  PassengerEnabled On
  DocumentRoot /usr/share/puppet/rack/puppetmasterd_18141/public
  <Directory /usr/share/puppet/rack/puppetmasterd_18141>
    Options None
    AllowOverride None
    Order allow,deny
    allow from all
  </Directory>

  # log settings
  ErrorLog /var/log/apache2/puppetmaster_worker_error_2.log
  CustomLog /var/log/apache2/puppetmaster_worker_access_2.log combined

</VirtualHost>

补充说明

apache默认没有加载 proxy 和 proxy_balancer 和 proxy_http 模块，需要补上

cd /etc/apache2/mods-enabled
ln -s ../mods-available/proxy.conf proxy.conf
ln -s ../mods-available/proxy.load proxy.load
ln -s ../mods-available/proxy_balancer.conf proxy_balancer.conf 
ln -s ../mods-available/proxy_balancer.load proxy_balancer.load
ln -s ../mods-available/proxy_http.load proxy_http.load     # 没有这个模块， agent 会有 503错误

cd /etc/apache2/sites-enabled
ln -s ../sites-available/puppetmaster_proxy.conf puppetmaster_proxy
ln -s ../sites-available/puppetmaster_worker_1.conf puppetmaster_worker_1
ln -s ../sites-available/puppetmaster_worker_2.conf puppetmaster_worker_2

默认的 8140 端口关闭

rm /etc/apache2/sites-enabled/puppetmaster
service apache2 restart

配置完成后如果有类似如下 403 权限不足的错误

Warning: Unable to fetch my node definition, but the agent run will continue:
Warning: Error 403 on SERVER: Forbidden request: localhost(127.0.0.1) access to /certificate_revocation_list/ca [find] at :119

那么, 将 master-1 上的 /etc/puppet/puppet.conf 文件中 [master] 下 如下2行注释掉。（估计SSL由代理服务器来完成）

#ssl_client_header = SSL_CLIENT_S_DN
#ssl_client_verify_header = SSL_CLIENT_VERIFY

测试配置结果

默认的负载均衡

# puppet master 上执行
root@master-1:/var/log/apache2# service apache2 restart
# 开始时, 负载均衡的log都是空的
root@master-1:/var/log/apache2# ll /var/log/apache2/   
total 4
-rw-r--r-- 1 root root   0 Jan  7 09:58 access.log
-rw-r--r-- 1 root root   0 Jan  7 16:43 balancer_access.log
-rw-r--r-- 1 root root   0 Jan  7 16:43 balancer_error.log
-rw-r--r-- 1 root root   0 Jan  7 16:43 balancer_ssl_requests.log
-rw-r--r-- 1 root root 597 Jan  7 16:43 error.log
-rw-r--r-- 1 root root   0 Jan  7 09:58 other_vhosts_access.log
-rw-r--r-- 1 root root   0 Jan  7 16:43 puppetmaster_worker_access_1.log
-rw-r--r-- 1 root root   0 Jan  7 16:43 puppetmaster_worker_access_2.log
-rw-r--r-- 1 root root   0 Jan  7 16:43 puppetmaster_worker_error_1.log
-rw-r--r-- 1 root root   0 Jan  7 16:43 puppetmaster_worker_error_2.log

# agent 上执行
puppet agent -t

# master 上查看log
root@master-1:/var/log/apache2# ll /var/log/apache2/
total 20
-rw-r--r-- 1 root root   0 Jan  7 09:58 access.log
-rw-r--r-- 1 root root 821 Jan  7 16:52 balancer_access.log
-rw-r--r-- 1 root root   0 Jan  7 16:43 balancer_error.log
-rw-r--r-- 1 root root 903 Jan  7 16:52 balancer_ssl_requests.log
-rw-r--r-- 1 root root 597 Jan  7 16:43 error.log
-rw-r--r-- 1 root root   0 Jan  7 09:58 other_vhosts_access.log
-rw-r--r-- 1 root root 489 Jan  7 16:52 puppetmaster_worker_access_1.log
-rw-r--r-- 1 root root 311 Jan  7 16:52 puppetmaster_worker_access_2.log
-rw-r--r-- 1 root root   0 Jan  7 16:43 puppetmaster_worker_error_1.log
-rw-r--r-- 1 root root   0 Jan  7 16:43 puppetmaster_worker_error_2.log
root@master-1:/var/log/apache2# cat balancer_access.log
192.168.1.120 - - [07/Jan/2015:16:52:37 +0800] "GET /production/node/node-1.puppet.com?transaction_uuid=7998c4d3-ba8e-4ffd-8f7f-8d37f3de42ec&fail_on_404=true HTTP/1.1" 200 10464 "-" "Ruby"
192.168.1.120 - - [07/Jan/2015:16:52:39 +0800] "GET /production/file_metadatas/pluginfacts?links=manage&recurse=true&ignore=.svn&ignore=CVS&ignore=.git&checksum_type=md5 HTTP/1.1" 200 569 "-" "Ruby"
192.168.1.120 - - [07/Jan/2015:16:52:40 +0800] "GET /production/file_metadatas/plugins?links=manage&recurse=true&ignore=.svn&ignore=CVS&ignore=.git&checksum_type=md5 HTTP/1.1" 200 569 "-" "Ruby"
192.168.1.120 - - [07/Jan/2015:16:52:40 +0800] "POST /production/catalog/node-1.puppet.com HTTP/1.1" 200 869 "-" "Ruby"
192.168.1.120 - - [07/Jan/2015:16:52:41 +0800] "PUT /production/report/node-1.puppet.com HTTP/1.1" 200 298 "-" "Ruby"
root@master-1:/var/log/apache2# cat puppetmaster_worker_access_1.log
127.0.0.1 - - [07/Jan/2015:16:52:37 +0800] "GET /production/node/node-1.puppet.com?transaction_uuid=7998c4d3-ba8e-4ffd-8f7f-8d37f3de42ec&fail_on_404=true HTTP/1.1" 200 5120 "-" "Ruby"
127.0.0.1 - - [07/Jan/2015:16:52:40 +0800] "GET /production/file_metadatas/plugins?links=manage&recurse=true&ignore=.svn&ignore=CVS&ignore=.git&checksum_type=md5 HTTP/1.1" 200 566 "-" "Ruby"
127.0.0.1 - - [07/Jan/2015:16:52:41 +0800] "PUT /production/report/node-1.puppet.com HTTP/1.1" 200 295 "-" "Ruby"
root@master-1:/var/log/apache2# cat puppetmaster_worker_access_2.log
127.0.0.1 - - [07/Jan/2015:16:52:39 +0800] "GET /production/file_metadatas/pluginfacts?links=manage&recurse=true&ignore=.svn&ignore=CVS&ignore=.git&checksum_type=md5 HTTP/1.1" 200 567 "-" "Ruby"
127.0.0.1 - - [07/Jan/2015:16:52:40 +0800] "POST /production/catalog/node-1.puppet.com HTTP/1.1" 200 866 "-" "Ruby"

从上面的log可以看出 agent 上执行的 puppet agent -t 一共访问了 5 次 master.
其中3次由 worker_1 处理了, 2次由 worker_2 处理了. <== 这就是负载均衡的效果

负载均衡情况下, 一台 puppet master 挂了的情况

# master 上执行, 清空log, 删除 puppetmaster_worker_1 的配置, 重启apache2 服务
root@master-1:~# rm /var/log/apache2/* -rf
root@master-1:~# rm /etc/apache2/sites-enabled/puppetmaster_worker_1
rm: remove symbolic link `/etc/apache2/sites-enabled/puppetmaster_worker_1'? y
root@master-1:~# service apache2 restart
[ ok ] Restarting web server: apache2 ... waiting .
root@master-1:~# ll /var/log/apache2/
total 4
-rw-r--r-- 1 root root   0 Jan  7 17:53 access.log
-rw-r--r-- 1 root root   0 Jan  7 17:53 balancer_access.log
-rw-r--r-- 1 root root   0 Jan  7 17:53 balancer_error.log
-rw-r--r-- 1 root root   0 Jan  7 17:53 balancer_ssl_requests.log
-rw-r--r-- 1 root root 155 Jan  7 17:53 error.log
-rw-r--r-- 1 root root   0 Jan  7 17:53 other_vhosts_access.log
-rw-r--r-- 1 root root   0 Jan  7 17:53 puppetmaster_worker_access_2.log
-rw-r--r-- 1 root root   0 Jan  7 17:53 puppetmaster_worker_error_2.log

# agent 上执行
root@node-1:~# puppet agent -t
Info: Retrieving pluginfacts
Info: Retrieving plugin
Info: Caching catalog for node-1.puppet.com
Info: Applying configuration version '1420626127'
Notice: Finished catalog run in 0.03 seconds

# master 上查看执行结果
root@master-1:~# ll /var/log/apache2/
total 20
-rw-r--r-- 1 root root   0 Jan  7 17:53 access.log
-rw-r--r-- 1 root root 821 Jan  7 18:22 balancer_access.log
-rw-r--r-- 1 root root 223 Jan  7 18:22 balancer_error.log
-rw-r--r-- 1 root root 903 Jan  7 18:22 balancer_ssl_requests.log
-rw-r--r-- 1 root root 155 Jan  7 17:53 error.log
-rw-r--r-- 1 root root   0 Jan  7 17:53 other_vhosts_access.log
-rw-r--r-- 1 root root 800 Jan  7 18:22 puppetmaster_worker_access_2.log
-rw-r--r-- 1 root root   0 Jan  7 17:53 puppetmaster_worker_error_2.log
root@master-1:~# cat /var/log/apache2/balancer_access.log
192.168.1.120 - - [07/Jan/2015:18:22:05 +0800] "GET /production/node/node-1.puppet.com?transaction_uuid=29b0a3a5-8749-4647-92a4-a6da66c25c64&fail_on_404=true HTTP/1.1" 200 10466 "-" "Ruby"
192.168.1.120 - - [07/Jan/2015:18:22:06 +0800] "GET /production/file_metadatas/pluginfacts?links=manage&recurse=true&ignore=.svn&ignore=CVS&ignore=.git&checksum_type=md5 HTTP/1.1" 200 569 "-" "Ruby"
192.168.1.120 - - [07/Jan/2015:18:22:06 +0800] "GET /production/file_metadatas/plugins?links=manage&recurse=true&ignore=.svn&ignore=CVS&ignore=.git&checksum_type=md5 HTTP/1.1" 200 569 "-" "Ruby"
192.168.1.120 - - [07/Jan/2015:18:22:07 +0800] "POST /production/catalog/node-1.puppet.com HTTP/1.1" 200 869 "-" "Ruby"
192.168.1.120 - - [07/Jan/2015:18:22:07 +0800] "PUT /production/report/node-1.puppet.com HTTP/1.1" 200 298 "-" "Ruby"
root@master-1:~# cat /var/log/apache2/puppetmaster_worker_access_2.log
127.0.0.1 - - [07/Jan/2015:18:22:05 +0800] "GET /production/node/node-1.puppet.com?transaction_uuid=29b0a3a5-8749-4647-92a4-a6da66c25c64&fail_on_404=true HTTP/1.1" 200 5122 "-" "Ruby"
127.0.0.1 - - [07/Jan/2015:18:22:06 +0800] "GET /production/file_metadatas/pluginfacts?links=manage&recurse=true&ignore=.svn&ignore=CVS&ignore=.git&checksum_type=md5 HTTP/1.1" 200 566 "-" "Ruby"
127.0.0.1 - - [07/Jan/2015:18:22:06 +0800] "GET /production/file_metadatas/plugins?links=manage&recurse=true&ignore=.svn&ignore=CVS&ignore=.git&checksum_type=md5 HTTP/1.1" 200 566 "-" "Ruby"
127.0.0.1 - - [07/Jan/2015:18:22:07 +0800] "POST /production/catalog/node-1.puppet.com HTTP/1.1" 200 866 "-" "Ruby"
127.0.0.1 - - [07/Jan/2015:18:22:07 +0800] "PUT /production/report/node-1.puppet.com HTTP/1.1" 200 295 "-" "Ruby"

从上面的log可以看出, 没有生成 worker_1 的log, 全部处理都是由 worker_2 完成的. agent 也没有出错.