Apache+Tomcat+keepalived的负载均衡session复制及HA

2021-07-17 12:51:41

1 Apache负载均衡

0、关闭防火墙service iptables stop; chkconfig --level 35 iptables off

关闭selinux vi /etc/selinux/config SELINUX=disabled

setenforce 0 生效

1、将mod_jk-1.2.31-httpd-2.2.x.so上传至/etc/httpd/modules目录下

2、

vi /etc/httpd/conf/httpd.conf

在Include conf.d/*.conf下

增加

Include /etc/httpd/conf/mod_jk.conf

配置

ServerName=192.168.1.X:80

3、

vi /etc/httpd/conf/mod_jk.conf

增加

LoadModule jk_module /etc/httpd/modules/mod_jk.so

JkWorkersFile /etc/httpd/conf/workers.properties

JkLogFile /etc/httpd/logs/mod_jk.log

JkLogLevel warn

JkLogStampFormat "[%a %b %d %H:%M:%S %Y]"

JkMount /*.* controller

4、

vi /etc/httpd/conf/workers.properties

增加

worker.list=controller

worker.tomcat1.port=8009

worker.tomcat1.host=192.168.1.152

worker.tomcat1.type=ajp13

worker.tomcat1.lbfactor=1

worker.tomcat2.port=8009

worker.tomcat2.host=192.168.1.155

worker.tomcat2.type=ajp13

worker.tomcat2.lbfactor=1

worker.tomcat3.port=8009

worker.tomcat3.host=192.168.1.156

worker.tomcat3.type=ajp13

worker.tomcat3.lbfactor=1

worker.controller.type=lb

worker.retries=3

worker.controller.balance_workers=tomcat1,tomcat2,tomcat3

worker.controller.sticky_session=false

2 Tomcat session复制

1、对于每一个server.xml

2、在Engine标签内增加

3、在程序的web.xml的web-app结束前增加 <distributable/>

4、session复制需用组播添加static route

vi /etc/sysconfig/network-scripts/route-eth0
增加

192.0.2.0/24 dev eth0 scope host
default via 192.0.2.1
192.168.2.0/24 via 192.168.13.1 dev eth0

service network restart

reboot 有效

3 HA高可用性keepalived配置

1、apache安装在105和106上

2、两台apache配置保持一致除了httpd.conf的SERVERNAME配置的ip地址

3、两台机器分别安装keepalived

yum -y install keepalived

4、配置keepalived105

vi /etc/keepalived/keepalived.conf

========================================================

! Configuration File for keepalived

global_defs {

notification_email {

acassen@firewall.loc

failover@firewall.loc

sysadmin@firewall.loc

}

notification_email_from admin@wisely.com

smtp_server 192.168.1.0

smtp_connect_timeout 30

router_id LVS_DEVEL

}

vrrp_script chk_httpd {

script "killall -0 httpd"

interval 1

weight -2

}

vrrp_instance httpd_1 {

state MASTER

interface eth0

virtual_router_id 58

priority 100 #priority

advert_int 1

authentication {

auth_type PASS

auth_pass 1058

}

virtual_ipaddress {

192.168.1.101 #vip

}

track_script {

chk_httpd

}

=========================================================

service keepalived start #启动keepalived服务

chkconfig keepalived on

5、配置keepalived106