day48-tomcat集群架构

2019-10-08  本文已影响0人  江枍_a99e

1.Nginx+Tomcat集群架构介绍

(1)tomcat集群能带来什么
①提高服务的性能,并发能力,以及高可用
②提高项目架构的扩展能力
(2t)tomcat集群实现原理
通过nginx负载均衡进行请求转发
(3)tomcat集群架构图


.5.png

2.nginx+tomcat集群架构实战

负载均衡:

[root@lb01 conf.d]# cat proxy_zrlog.oldxu.com.conf 
    upstream  zrlog {
        server 172.16.1.7:8080;
        server 172.16.1.8:8080;
    }

    server {
        listen 80;
        server_name zrlog.oldxu.com;

        location / {
            proxy_pass http://zrlog;
            include proxy_params;
        }
    }

3.nginx+tomcat集群会话共享

session测试用例
(1)配置虚拟主机

[root@web01 conf]# vim /soft/tomcat/conf/server.xml 
<!--session站点-->
  <Host name="session.oldxu.com"  appBase="/code/session"
        unpackWARs="true" autoDeploy="true">
  </Host>

(2)准备index.jsp文件(为了区分需要调整输出的web01 web02)

mkdir -p /code/session/ROOT
[root@web01 conf]#  /code/session/ROOT/index.jsp 
<body>
<%
//HttpSession session = request.getSession(true);
System.out.println(session.getCreationTime());
out.println("<br> web01 SESSION ID:" + session.getId() + "<br>");
out.println("Session created time is :" + session.getCreationTime()
+ "<br>");
%>
</body>

(3)下载TomcatClusterRedisSessionManager (所有web集群都需要操作)
GitHub地址 https://github.com/ran-jit/tomcat-cluster-redis-session-manager

[root@tomcat ~]# wget https://github.com/ran-jit/tomcat-cluster-redis-session-manager/releases/download/3.0.3/tomcat-cluster-redis-session-manager.zip
[root@tomcat ~]# unzip tomcat-cluster-redis-session-manager.zip
[root@web01 ~]# cd tomcat-cluster-redis-session-manager

(4)拷贝jar包

[root@web01 tomcat-cluster-redis-session-manager]# cp lib/* /soft/tomcat/lib/

(5)拷贝tomcat连接redis配置文件

[root@web01 tomcat-cluster-redis-session-manager]# cp conf/redis-data-cache.properties /soft/tomcat/conf/

(6)修改redis-data-cache.propertie

[root@web01 ~]# vim /soft/tomcat/conf/redis-data-cache.properties
...
redis.hosts=172.16.1.51:6379
redis.password=123456           #有密码就写密码,没有不要写
...

(7)添加如下两行至tomcat/conf/context.xml

[root@web01 ~]# vim /soft/tomcat/conf/context.xml
<Context>
    .....
    <Valve className="tomcat.request.session.redis.SessionHandlerValve" />
    <Manager className="tomcat.request.session.redis.SessionManager" />
    ....
</Context>
(8)修改tomcat/conf/web.xml 配置文件session的超时时间 ,单位是分钟
~~~bash
<session-config>
<session-timeout>60</session-timeout>----根据情况调整
</session-config>

(9).安装redis,当然也可以自行搭建redis集群,anyway

[root@redis ~]# yum install redis -y
[root@redis ~]# cat /etc/redis.conf
...
bind 172.16.1.51 127.0.0.1
requirepass 123456--------如果不需要密码,则不要配置
...
[root@redis ~]# systemctl start redis
[root@redis ~]# systemctl enable redis

(10)重启多台机器的Tomcat
pkill java
/soft/tomcat/bin/startup.sh
(11)接入负载均衡,通过负载均衡轮询调度检查是否正常
redis -cli
auth 123456
keys *

4.如果session会话不正常:

将域名解析到指定的服务器,通过8080的方式去访问,测试,检查日志.

5..Nginx+Tomcat集群全站Https

单台:
(1)http接收器修改为 80端口 ---> 443
(2)配置443的证书
集群:

oot@lb01 conf.d]# cat proxy_zrlog.oldxu.com.conf 
upstream  zrlog {
    server 172.16.1.7:8080;
    server 172.16.1.8:8080;
}

server {
    listen 443 ssl;
    ssl_certificate ssl_key/server.crt;
    ssl_certificate_key ssl_key/server.key;
    server_name zrlog.oldxu.com;

    location / {
        proxy_pass http://zrlog;
        include proxy_params;
    }
}
server {
    listen 80;
    server_name zrlog.oldxu.com;
    return 302 https://$http_host$request_uri;
}
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