Configure Apache load balancer with mod proxy - Revision history

Blucecio at 09:59, 27 April 2020

2020-04-27T09:59:00Z

← Older revision		Revision as of 09:59, 27 April 2020
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	Use the following commands:		Use the following commands:

	<~~source~~ lang="bash">		<syntaxhighlight lang="bash">
	$ sudo a2enmod proxy		$ sudo a2enmod proxy
	$ sudo a2enmod proxy_http		$ sudo a2enmod proxy_http
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	$ sudo a2enmod lbmethod_byrequests		$ sudo a2enmod lbmethod_byrequests
	$ sudo a2enmod headers		$ sudo a2enmod headers
	</~~source~~>		</syntaxhighlight>

	Run all the above commands then restart Apache to obtain the effect of changes we have made.		Run all the above commands then restart Apache to obtain the effect of changes we have made.
	<~~pre~~>		<syntaxhighlight lang="bash">
	$ sudo service apache2 restart		$ sudo service apache2 restart
	</~~pre~~>		</syntaxhighlight>

	== Define Apache Load-balancer ==		== Define Apache Load-balancer ==
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	In this file we are going to add the proxyName and proxyPort attributes to the Connector element		In this file we are going to add the proxyName and proxyPort attributes to the Connector element

	<~~source~~ lang="xml">		<syntaxhighlight lang="xml">
	<Connector port="8082" protocol="HTTP/1.1"		<Connector port="8082" protocol="HTTP/1.1"
	connectionTimeout="20000"		connectionTimeout="20000"
	redirectPort="8445"		redirectPort="8445"
	URIEncoding="UTF-8" server="Undisclosed/8.41" proxyName="ldproxy.org" proxyPort="80" />		URIEncoding="UTF-8" server="Undisclosed/8.41" proxyName="ldproxy.org" proxyPort="80" />
	</~~source~~>		</syntaxhighlight>

	The proxyName will cause servlets inside this web application to think that all proxied requests were directed to ldproxy.org on port 80		The proxyName will cause servlets inside this web application to think that all proxied requests were directed to ldproxy.org on port 80

Blucecio at 09:46, 27 April 2020

2020-04-27T09:46:58Z

← Older revision		Revision as of 09:46, 27 April 2020
Line 9:		Line 9:
	Use the following commands:		Use the following commands:

	<~~syntaxhighlight~~ lang="bash">		<source lang="bash">
	$ sudo a2enmod proxy		$ sudo a2enmod proxy
	$ sudo a2enmod proxy_http		$ sudo a2enmod proxy_http
Line 15:		Line 15:
	$ sudo a2enmod lbmethod_byrequests		$ sudo a2enmod lbmethod_byrequests
	$ sudo a2enmod headers		$ sudo a2enmod headers
	</~~syntaxhighlight~~>		</source>

	Run all the above commands then restart Apache to obtain the effect of changes we have made.		Run all the above commands then restart Apache to obtain the effect of changes we have made.
Line 76:		Line 76:
	In this file we are going to add the proxyName and proxyPort attributes to the Connector element		In this file we are going to add the proxyName and proxyPort attributes to the Connector element

	<~~syntaxhighlight~~ lang="xml">		<source lang="xml">
	<Connector port="8082" protocol="HTTP/1.1"		<Connector port="8082" protocol="HTTP/1.1"
	connectionTimeout="20000"		connectionTimeout="20000"
	redirectPort="8445"		redirectPort="8445"
	URIEncoding="UTF-8" server="Undisclosed/8.41" proxyName="ldproxy.org" proxyPort="80" />		URIEncoding="UTF-8" server="Undisclosed/8.41" proxyName="ldproxy.org" proxyPort="80" />
	</~~syntaxhighlight~~>		</source>

	The proxyName will cause servlets inside this web application to think that all proxied requests were directed to ldproxy.org on port 80		The proxyName will cause servlets inside this web application to think that all proxied requests were directed to ldproxy.org on port 80

Blucecio at 09:46, 27 April 2020

2020-04-27T09:46:02Z

← Older revision		Revision as of 09:46, 27 April 2020
Line 9:		Line 9:
	Use the following commands:		Use the following commands:

	<~~source~~ lang="bash">		<syntaxhighlight lang="bash">
	$ sudo a2enmod proxy		$ sudo a2enmod proxy
	$ sudo a2enmod proxy_http		$ sudo a2enmod proxy_http
Line 15:		Line 15:
	$ sudo a2enmod lbmethod_byrequests		$ sudo a2enmod lbmethod_byrequests
	$ sudo a2enmod headers		$ sudo a2enmod headers
	</~~source~~>		</syntaxhighlight>

	Run all the above commands then restart Apache to obtain the effect of changes we have made.		Run all the above commands then restart Apache to obtain the effect of changes we have made.
Line 76:		Line 76:
	In this file we are going to add the proxyName and proxyPort attributes to the Connector element		In this file we are going to add the proxyName and proxyPort attributes to the Connector element

	<~~source~~ lang="xml">		<syntaxhighlight lang="xml">
	<Connector port="8082" protocol="HTTP/1.1"		<Connector port="8082" protocol="HTTP/1.1"
	connectionTimeout="20000"		connectionTimeout="20000"
	redirectPort="8445"		redirectPort="8445"
	URIEncoding="UTF-8" server="Undisclosed/8.41" proxyName="ldproxy.org" proxyPort="80" />		URIEncoding="UTF-8" server="Undisclosed/8.41" proxyName="ldproxy.org" proxyPort="80" />
	</~~source~~>		</syntaxhighlight>

	The proxyName will cause servlets inside this web application to think that all proxied requests were directed to ldproxy.org on port 80		The proxyName will cause servlets inside this web application to think that all proxied requests were directed to ldproxy.org on port 80

Blucecio at 09:44, 27 April 2020

2020-04-27T09:44:26Z

← Older revision		Revision as of 09:44, 27 April 2020
Line 9:		Line 9:
	Use the following commands:		Use the following commands:

	<source lang="~~text~~">		<source lang="bash">
	$ sudo a2enmod proxy		$ sudo a2enmod proxy
	$ sudo a2enmod proxy_http		$ sudo a2enmod proxy_http
Line 18:		Line 18:

	Run all the above commands then restart Apache to obtain the effect of changes we have made.		Run all the above commands then restart Apache to obtain the effect of changes we have made.
	<~~source lang="text"~~>		<pre>
	$ sudo service apache2 restart		$ sudo service apache2 restart
	</~~source~~>		</pre>

	== Define Apache Load-balancer ==		== Define Apache Load-balancer ==
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	First, create a virtual host handling the requests for your domain: ldproxy.org		First, create a virtual host handling the requests for your domain: ldproxy.org

	<~~source lang="bash"~~>		<pre>
	<VirtualHost *:80>		<VirtualHost *:80>

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	</VirtualHost>		</VirtualHost>
	</~~source~~>		</pre>

	The load balancer nodes are two LogicalDOC servers that are accessed by IP and by hostname (eva00), of course the Apache server must be able to resolve the hostname.		The load balancer nodes are two LogicalDOC servers that are accessed by IP and by hostname (eva00), of course the Apache server must be able to resolve the hostname.
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	You can test this by stopping Tomcat on one of the machines. The configured ErrorLog file proxy-error.log will show something like		You can test this by stopping Tomcat on one of the machines. The configured ErrorLog file proxy-error.log will show something like

	<~~source lang="text"~~>		<pre>
	[Tue Jun 25 09:55:34.431671 2019] [proxy:error] [pid 12308] (113)No route to host: AH00957: HTTP: attempt to connect to 192.168.2.15:8082 (192.168.2.15) failed		[Tue Jun 25 09:55:34.431671 2019] [proxy:error] [pid 12308] (113)No route to host: AH00957: HTTP: attempt to connect to 192.168.2.15:8082 (192.168.2.15) failed
	[Tue Jun 25 09:55:34.431768 2019] [proxy:error] [pid 12308] AH00959: ap_proxy_connect_backend disabling worker for (192.168.2.15) for 60s		[Tue Jun 25 09:55:34.431768 2019] [proxy:error] [pid 12308] AH00959: ap_proxy_connect_backend disabling worker for (192.168.2.15) for 60s
	</~~source~~>		</pre>

	== Advanced Configuration ==		== Advanced Configuration ==
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	Also in this example the [https://httpd.apache.org/docs/trunk/howto/reverse_proxy.html#manager status] directive was applied to the second node of the cluster. This causes all requests to be sent to the first server and keeps the second LogicalDOC server in hot-standby mode (it will only be used if no other viable workers or spares are available in the balancer set).		Also in this example the [https://httpd.apache.org/docs/trunk/howto/reverse_proxy.html#manager status] directive was applied to the second node of the cluster. This causes all requests to be sent to the first server and keeps the second LogicalDOC server in hot-standby mode (it will only be used if no other viable workers or spares are available in the balancer set).

	<~~source lang="text"~~>		<pre>
	<VirtualHost *:80>		<VirtualHost *:80>

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	</VirtualHost>		</VirtualHost>
	</~~source~~>		</pre>

	{{Warning\|Do not enable the balancer-manager until you have [https://httpd.apache.org/docs/trunk/mod/mod_proxy.html#access secured your server]. In particular, ensure that access to the URL is tightly restricted.}}		{{Warning\|Do not enable the balancer-manager until you have [https://httpd.apache.org/docs/trunk/mod/mod_proxy.html#access secured your server]. In particular, ensure that access to the URL is tightly restricted.}}

Blucecio: /* Define Apache Load-balancer */

2020-04-27T09:42:53Z

Define Apache Load-balancer

← Older revision		Revision as of 09:42, 27 April 2020
Line 30:		Line 30:
	First, create a virtual host handling the requests for your domain: ldproxy.org		First, create a virtual host handling the requests for your domain: ldproxy.org

	<source lang="~~text~~">		<source lang="bash">
	<VirtualHost *:80>		<VirtualHost *:80>

Blucecio: /* Server setup */

2019-06-28T14:33:52Z

Server setup

← Older revision		Revision as of 14:33, 28 June 2019
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	The layout may look something like this (we will refer to these names through the rest of the guide).		The layout may look something like this (we will refer to these names through the rest of the guide).
	[[File:Apache-load-balancer-mod-proxy-http.png\|~~frame~~\|center\|Apache load balancer mod_proxy_http Tomcat]]		[[File:Apache-load-balancer-mod-proxy-http.png\|656px\|center\|Apache load balancer mod_proxy_http Tomcat]]

	=== Enable Apache modules in Ubuntu ===		=== Enable Apache modules in Ubuntu ===

Blucecio: /* Server setup */

2019-06-28T14:31:01Z

Server setup

← Older revision		Revision as of 14:31, 28 June 2019
Line 3:		Line 3:

	The layout may look something like this (we will refer to these names through the rest of the guide).		The layout may look something like this (we will refer to these names through the rest of the guide).
	[[File:Apache-load-balancer-mod-proxy-http.png\|~~thumb~~\|center\|Apache load balancer mod_proxy_http Tomcat]]		[[File:Apache-load-balancer-mod-proxy-http.png\|frame\|center\|Apache load balancer mod_proxy_http Tomcat]]

	=== Enable Apache modules in Ubuntu ===		=== Enable Apache modules in Ubuntu ===

Blucecio: /* Server setup */

2019-06-28T14:30:32Z

Server setup

← Older revision		Revision as of 14:30, 28 June 2019
Line 3:		Line 3:

	The layout may look something like this (we will refer to these names through the rest of the guide).		The layout may look something like this (we will refer to these names through the rest of the guide).
			[[File:Apache-load-balancer-mod-proxy-http.png\|thumb\|center\|Apache load balancer mod_proxy_http Tomcat]]

	=== Enable Apache modules in Ubuntu ===		=== Enable Apache modules in Ubuntu ===

Blucecio: /* Additional information */

2019-06-28T14:08:49Z

Additional information

← Older revision		Revision as of 14:08, 28 June 2019
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	* [https://poweruphosting.com/blog/apache-reverse-proxy/ How To Use Apache Reverse Proxy with mod_proxy on Ubuntu 16.04]		* [https://poweruphosting.com/blog/apache-reverse-proxy/ How To Use Apache Reverse Proxy with mod_proxy on Ubuntu 16.04]
	* [https://httpd.apache.org/docs/trunk/howto/reverse_proxy.html Apache Reverse Proxy Guide]		* [https://httpd.apache.org/docs/trunk/howto/reverse_proxy.html Apache Reverse Proxy Guide]
			* [http://www.techjira.com/html/loadbalancer/mod_proxy.html Techjira - Apache mod_proxy]

Blucecio: /* Advanced Configuration */

2019-06-28T09:36:27Z

Advanced Configuration

← Older revision		Revision as of 09:36, 28 June 2019
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	</VirtualHost>		</VirtualHost>
	</source>		</source>

			{{Warning\|Do not enable the balancer-manager until you have [https://httpd.apache.org/docs/trunk/mod/mod_proxy.html#access secured your server]. In particular, ensure that access to the URL is tightly restricted.}}

	== Additional information ==		== Additional information ==