puppet 横向扩展(一)
目录
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.
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