tecnicume: Bilanciare due Tomcat con apache 2.4

martedì 29 marzo 2016

Bilanciare due Tomcat con apache 2.4

Capita spesso di dover realizzare un servizio session-less che punti a due o più nodi di tomcat pilotati da un classico balancer di apache2.

Ecco l'esperimento su una macchina virtuale.


	#su una Ubuntu 15.04 server

	##Install java 8
	sudo add-apt-repository ppa:webupd8team/java
	sudo apt-get update
	sudo apt-get install oracle-java8-installer
	sudo apt-get install oracle-java8-set-default

	##Verificare se è dispinibile la versione 2.4 di apache
	sudo apt-get -s install apache2
	##se disponibile
	sudo apt-get install apache2

	##start apache2
	sudo /etc/init.d/apache2 start

	##test via browser
	http://192.168.1.13/


	##Tomcat 8
	##nuovo utente Tomcat
	sudo adduser --system --shell /bin/bash --gecos 'Tomcat Java Servlet and JSP engine' --group --disabled-password --home /home/tomcat tomcat
	##download tomcat 8
	cd /opt/
	sudo wget http://mirror.nohup.it/apache/tomcat/tomcat-8/v8.0.32/bin/apache-tomcat-8.0.32.zip
	sudo unzip apache-tomcat-8.0.32.zip
	sudo chown -R tomcat:tomcat apache-tomcat*
	cd apache-tomcat-8.0.32/bin
	sudo chmod +x *.sh

	##edit file on conf/tomcat-user.xml
	<role rolename="manager-gui"/>
	<role rolename="manager-script"/>
	<role rolename="manager-jmx"/>
	<role rolename="manager-status"/>
	<user username="tomcat" password="tomcat" roles="manager-gui,manager-script,manager-jmx,manager-status"/>

	##move folder to *_NODE1
	mv apache-tomcat-8.0.32 apache-tomcat-8.0.32_NODE1

	##create 2 tomcat node, clone folder
	cp -a apache-tomcat-8.0.32_NODE1 apache-tomcat-8.0.32_NODE2

	##edit apache-tomcat-8.0.32_NODE2/conf/server.xml
	modify <Connector port="8080" protocol="HTTP/1.1"...
	to <Connector port="8081" protocol="HTTP/1.1"


	##test tomcat
	#switch to tomat user
	sudo chown -R tomcat:tomcat apache-tomcat*
	sudo su - tomcat
	/opt/apache-tomcat-8.0.32_NODE1/bin/startup.sh
	/opt/apache-tomcat-8.0.32_NODE2/bin/startup.sh

	##via browser
	http://192.168.1.13:8080/
	http://192.168.1.13:8081/
	##tomcat manager
	usr:tomcat
	pwd: tomcat
	http://192.168.1.13:8080/manager/html
	http://192.168.1.13:8081/manager/html


	##test page
	http://192.168.1.13:8080/examples/jsp/jsp2/simpletag/hello.jsp
	http://192.168.1.13:8081/examples/jsp/jsp2/simpletag/hello.jsp

	##create sample page test
	apache-tomcat-8.0.32_NODE2/webapps/examples/balancer.html
	with:
	<html>
	<body>
	<h1>NODE 2</h2>
	</body>
	</html>

	##and

	apache-tomcat-8.0.32_NODE1/webapps/examples/balancer.html
	with:
	<html>
	<body>
	<h1>NODE 1</h1>
	</body>
	</html>


	##test it:
	http://192.168.1.13:8081/examples/balancer.html
	http://192.168.1.13:8080/examples/balancer.html


	##edit apache2conf

	edit /etc/apache2/sites-available/001-test-balance.conf

	<VirtualHost *:80>
	ServerName test.bal
	<Proxy "balancer://mybal">
	BalancerMember "http://127.0.0.1:8080"
	BalancerMember "http://127.0.0.1:8081"
	</Proxy>

	ProxyPass "/" "balancer://mybal/examples/"
	ProxyPassReverse "/" "balancer://mybal/examples/"

	ErrorLog ${APACHE_LOG_DIR}/balancer_error.log
	CustomLog ${APACHE_LOG_DIR}/balancer_access.log combined
	</VirtualHost>

	sudo a2ensite 001-test-balance.conf
	sudo a2dissite 000-default.conf
	sudo a2insmod proxy_http
	sudo a2insmid lbmethod_byrequests
	sudo a2insmid proxy_balancer
	sudo apache2ctl restart



	##edit server virtual hosts
	sudo joe /etc/hosts
	##add
	127.0.0.1 test.bal

	##edit local client virtual hosts
	192.168.1.13 test.bal

	test from browser
	http://test.bal//balancer.html
	or
	http://192.168.1.13/balancer.html

view raw test_balancer_with_tomcat.txt hosted with ❤ by GitHub

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