apache jboss集羣

搭建環境

三臺電腦：一臺裝apache,做爲loadbalancer,另二臺裝jboss,分別做爲node1,node2

 

配置負載均衡節點：

操作系統centos5.0用yum自帶安裝httpd,查看版本號用httpd -version命令，版本爲Apache/2.2.3,配置文件在/etc/httpd/conf/httpd.conf

下載mod_jk.so,拷貝到,/etc/httpd/modules

添加可執行權限：#chmod +x /etc/httpd/modules/mod_jk.so

添加配置文件mod_jk.conf,同時將路徑加到httpd.conf中，用Include conf/mod_jk.conf

內容如下：

# Load mod_jk module
# Specify the filename of the mod_jk lib
LoadModule jk_module modules/mod_jk.so
# Where to find workers.properties
JkWorkersFile conf/workers.properties
# Where to put jk logs
JkLogFile logs/mod_jk.log
# Set the jk log level [debug/error/info]
JkLogLevel info
# Select the log format
JkLogStampFormat "[%a %b %d %H:%M:%S %Y]"
# JkOptions indicates to send SSK KEY SIZE
JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories
# JkRequestLogFormat
JkRequestLogFormat "%w %V %T"
# Mount your applications
#jkMount /application/* loadbalancer
jkMount /* loadbalancer
# You can use external file for mount points.
# It will be checked for updates each 60 seconds.
# The format of the file is: /url=worker
# /examples/*=loadbalancer
JkMountFile conf/uriworkermap.properties
# Add shared memory.
# This directive is present with 1.2.10 and
# later versions of mod_jk, and is needed for
# for load balancing to work properly
JkShmFile logs/jk.shm
# Add jkstatus for managing runtime data
<Location /jkstatus/>
JkMount status
Order deny,allow
Deny from all
Allow from 127.0.0.1
</Location>

添加workers.properties文件，內容如下：

# Define list of workers that will be used
# for mapping requests
worker.list=loadbalancer,status
# Define Node1
# modify the host as your host IP or DNS name.
worker.node1.port=8009
worker.node1.host=192.168.0.13
worker.node1.type=ajp13
worker.node1.lbfactor=1
# Define Node2
# modify the host as your host IP or DNS name.
worker.node2.port=8009
worker.node2.host= 192.168.0.14
worker.node2.type=ajp13
worker.node2.lbfactor=1
# Define Node3
# modify the host as your host IP or DNS name.
#worker.node3.port=8009
#worker.node3.host= 192.168.0.15
#worker.node3.type=ajp13
#worker.node3.lbfactor=1
# Load-balancing .
worker.loadbalancer.type=lb
worker.loadbalancer.balance_workers=node1,node2
worker.loadbalancer.sticky_session=0
#worker.list=loadbalancer
# Status worker for managing load balancer
worker.status.type=status

 

注意：參數的意義。

worker.node1.host、worker.node2.host和worker.node3.host要改成jboss集羣各機器的實際IP.
如果有更多的節點,順序定義更多的node段,並在worker.loadbalancer.balance_workers後全部列出.
lbfactor是負載分配權重,值越大分配的負載越多.

Jboss提出粘着session(sticky session)概念。使用粘着session後，來自同一IP的請求將被髮送到同一個Jboss節點，從而保證session使用的連續性。如果應用中沒有使用session，則可以使用非粘着session的jboss集羣。這樣，負載分佈更爲合理。設置方法是編輯worker.loadbalancer.sticky_session。設置爲1使用粘着session，設置爲0不使用粘着session。

 

配置集羣服務器結點：

一、安裝JDK

1.檢查JDK版本

#rpm -qa|grep gcj

移除低版本的jdk,

#yum -y remove java-1.4.2-gcj-compat

記錄下移除的相關依賴包爲如下：

Dependency Removed: antlr.i386 0:2.7.6-4jpp.2 bsf.i386 0:2.3.0-11jpp.1 bsh.i386 0:1.3.0-9jpp.1 eclipse-ecj.i386 1:3.2.1-19.el5.centos gjdoc.i386 0:0.7.7-12.el5 hsqldb.i386 1:1.8.0.9-1jpp.2 jakarta-commons-codec.i386 0:1.3-7jpp.2 jakarta-commons-httpclient.i386 1:3.0-7jpp.1 jakarta-commons-logging.i386 0:1.0.4-6jpp.1 java-1.4.2-gcj-compat-devel.i386 0:1.4.2.0-40jpp.115 java-1.4.2-gcj-compat-javadoc.i386 0:1.4.2.0-40jpp.115 java-1.4.2-gcj-compat-src.i386 0:1.4.2.0-40jpp.115 junit.i386 0:3.8.2-3jpp.1 ldapjdk.i386 0:4.18-2jpp.3.el5 openoffice.org-calc.i386 1:2.3.0-6.5.4.el5_2 openoffice.org-core.i386 1:2.3.0-6.5.4.el5_2 openoffice.org-draw.i386 1:2.3.0-6.5.4.el5_2 openoffice.org-graphicfilter.i386 1:2.3.0-6.5.4.el5_2 openoffice.org-impress.i386 1:2.3.0-6.5.4.el5_2 openoffice.org-langpack-zh_CN.i386 1:2.3.0-6.5.4.el5_2 openoffice.org-langpack-zh_TW.i386 1:2.3.0-6.5.4.el5_2 openoffice.org-math.i386 1:2.3.0-6.5.4.el5_2 openoffice.org-writer.i386 1:2.3.0-6.5.4.el5_2 openoffice.org-xsltfilter.i386 1:2.3.0-6.5.4.el5_2 tomcat5-jsp-2.0-api.i386 0:5.5.23-0jpp.7.el5_2.1 tomcat5-servlet-2.4-api.i386 0:5.5.23-0jpp.7.el5_2.1 xalan-j2.i386 0:2.7.0-6jpp.1 xerces-j2.i386 0:2.7.1-7jpp.2 xml-commons-apis.i386 0:1.3.02-0.b2.7jpp.10 xml-commons-resolver.i386 0:1.1-1jpp.12 xmlrpc.i386 0:2.0.1-3jpp.1
下載：jdk-6u12-linux-i586-rpm.bin二進制文件，增加該文件爲可執行權限

#chmod +x jdk-6u12-linux-i586-rpm.bin

直接執行安裝jdk

./jdk-6u12-linux-i586-rpm.bin

設置Java路徑。
vi /etc/profile,同時也編輯~/.bashrc在結尾增加:
JAVA_HOME=/usr/java/jdk1.5.0_12
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
PATH=.:$JAVA_HOME/bin:$PATH
export JAVA_HOME CLASSPATH PATH

用JDK代替Redhat Linux AS4預裝的gcj

cd /usr/bin
ln -s -f /usr/java/jdk1.5.0_12/bin/java
ln -s -f /usr/java/jdk1.5.0_12/bin/javac

下載jems-installer－1.2.0.GA用圖形化界面來安裝jboss具體安裝詳細過程見

[url]http://jijian91.com/blog20071010/jboss-cluster.html[/url]

圖形方式

在x windows的終端窗口下，執行java –jar jems-installer-1.2.0.GA.jar,出現Jboss安裝圖形界面。

選擇“中文”。
下一步。
同意協議。
安裝路徑設置爲/usr/local/jboss,下一步。
選擇”all”,下一步。
選擇”advance”,把Name由default改爲all.其餘直接按下一步。
輸入Admin密碼，下一步。
等待安裝結束，完成。

命令行方式

java -jar jems-installer-1.2.0.GA.jar -installGroup all installpath=/usr/local/jboss
mv /usr/local/jboss/server/default /usr/local/jboss/server/all

 

修改配置。本例中，提供服務的監聽端口是8888，請根據實際情況修改。
vi /usr/local/jboss/server/all/deploy/jbossweb-tomcat55.sar/server.xml
找到.
注意,jvmRoute是節點號，要與在apache的workers.properties中的定義相對應.

vi /usr/local/jboss/server/all/deploy/jbossweb-tomcat55.sar/META-INF/jboss-service.xml
找到UseJK,改爲true.

配置jboss自動啓動

cp /usr/local/jboss/jboss_init_redhat.sh /etc/init.d/jboss
chmod 777 /etc/init.d/jboss
ln –s /etc/init.d/jboss /etc/rc3.d/S80jboss
ln –s /etc/init.d/jboss /etc/rc3.d/K20jboss
ln –s /etc/init.d/jboss /etc/rc4.d/S80jboss
ln –s /etc/init.d/jboss /etc/rc4.d/K20jboss
ln –s /etc/init.d/jboss /etc/rc5.d/S80jboss
ln –s /etc/init.d/jboss /etc/rc5.d/K20jboss

vi /etc/init.d/jboss
將JBOSS_HOME一行改爲JBOSS_HOME=${JBOSS_HOME:-”/usr/local/jboss”}
將JBOSS_USER一行改爲JBOSS_USER=${JBOSS_USER:-”root”}
將JAVAPTH一行改爲JAVAPTH=${JAVAPTH:-”/usr/java/jdk1.5.0_12″}
將JBOSS_CONF一行改爲JBOSS_CONF=${JBOSS_CONF:-”all”}
將JBOSSSH一行改爲JBOSSSH=${JBOSSSH:-”$JBOSS_HOME/bin/run.sh -c $JBOSS_CONF”}
將. $JBOSS_CMD_START >${JBOSS_CONSOLE} 2>&1 &改爲. $JBOSS_CMD_START >${JBOSS_CONSOLE} &
將$SUBIT “$JBOSS_CMD_START >${JBOSS_CONSOLE} 2>&1 &”改爲$SUBIT “$JBOSS_CMD_START >${JBOSS_CONSOLE} &”