tomcat loadbalance

종류
1. 라운드로빈
2. 가중치 라운드로빈
3. 라스트 컨넥션
4. IP HASH

아래는 가중치 라운드로빈 설정(Weighted Round Robin)

httpd.conf in virtualhost setting

JkMount        /*        [loadbalance name]

worker.properties

worker.list=[loadbalancer name]

worker.template.type=ajp13
worker.template.lbfactor=1
worker.template.host=localhost
worker.template.socket_timeout=600
worker.template.socket_keepalive=1
worker.template.retries=0

worker.tomcat1.reference=worker.template
worker.tomcat2.reference=worker.template

worker.[loadbalancer name].type=lb
worker.[loadbalancer name].balance_workers=tomcat1
worker.[loadbalancer name].balance_workers=tomcat2
worker.[loadbalancer name].retires=0
worker.[loadbalancer name].sticky_session=1

아래와 같이 설정 할 경우 2번 서버가 1번 서버보다 2배로 일하게됨.

worker.loadbalancer.type=lb
worker.loadbalancer.balance_workers=worker1,worker2
worker.worker1.type=ajp13
worker.worker1.host=server1
worker.worker1.port=8009
worker.worker1.lbfactor=1
worker.worker2.type=ajp13
worker.worker2.host=server2
worker.worker2.port=8009
worker.worker2.lbfactor=2

tomcat1-server.xml

<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat1">

tomcat2-server.xml

<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat2">

세션 유지를 아래 주석 제거
tomcat1-server.xml
tomcat2-server.xml

<!--
      <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
      -->

web.xml 태그 추가

<distributable/>

참고url
https://nowonbun.tistory.com/681

[Window] apache-tomcat에서 로드 밸런싱(Load balancing)하는 방법과 세션 클러스터링(세션 공유)

https://tomcat.apache.org/connectors-doc/reference/workers.html

The Apache Tomcat Connectors - Reference Guide (1.2.48) - workers.properties configuration