第十八周

1、Haproxy+Keepalived实现站点高可用

后端搭建http服务器：

yum install httpd

vim /etc/httpd/conf.d/vhost.conf

<VirtualHost 192.168.0.241:80>

    ServerName 192.168.0.241

    DocumentRoot "/data/web/vhost1"

    <Directory "/data/web/vhost1">

        Options FollowSymLinks

        AllowOverride None

        Require all granted

    </Directory>

</VirtualHost>

<VirtualHost 192.168.0.242:80>

    ServerName 192.168.0.242

    DocumentRoot "/data/web/vhost2"

    <Directory "/data/web/vhost2">

        Options FollowSymLinks

        AllowOverride None

        Require all granted

    </Directory>

</VirtualHost>

mkdir -p /data/web/vhost{1,2}

vim /data/web/vhost1/index.html

<h1>vhost1 192.168.0.241</h1>

vim /data/web/vhost2/index.html

<h1>vhost2 192.168.0.242</h1>

systemctl start httpd

搭建Haproxy+Keepalived主站点：

yum install haproxy keepalived

vi /etc/haproxy/haproxy.cfg

frontend main *:80

    default_backend            app

backend app

    balance    roundrobin

    server  app1 192.168.0.241:80 check

    server  app2 192.168.0.242:80 check

vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

  notification_email {

      root@localhost

  }

  script_user root

  enable_script_security 

  notification_email_from keepalived@localhost

  smtp_server 127.0.0.1

  smtp_connect_timeout 30

  router_id n1

  vrrp_mcast_group4 224.1.101.33

}

vrrp_instance VI_1 {

    state MASTER

    interface ens33

    virtual_router_id 51

    priority 100                    ##数值大为master

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass ZRhbGtAZ

    }

    virtual_ipaddress {

        192.168.0.100/24 dev ens33 label ens33:0

    }

}

systemctl start keepalived haproxy

搭建Haproxy+Keepalived备用站点：

yum install haproxy keepalived

vi /etc/haproxy/haproxy.cfg

frontend main *:80

    default_backend            app

backend app

    balance    roundrobin

    server  app1 192.168.0.241:80 check

    server  app2 192.168.0.242:80 check

vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

  notification_email {

      root@localhost

  }

  script_user root

  enable_script_security

  notification_email_from keepalived@localhost

  smtp_server 127.0.0.1

  smtp_connect_timeout 30

  router_id n2

  vrrp_mcast_group4 224.1.101.33

}

vrrp_instance VI_1 {

    state BACKUP

    interface ens33

    virtual_router_id 51

    priority 95                    ##数值大为master

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass ZRhbGtAZ

    }

    virtual_ipaddress {

        192.168.0.100/24 dev ens33 label ens33:0

    }

}

systemctl start keepalived haproxy

测试：




2、搭建tomcat服务器，并通过nginx反向代理访问

yum install /home/admin/下载/jdk-13.0.1_linux-x64_bin.rpm

vim /etc/profile.d/java.sh

JAVA_HOME=/usr/java/latest

PATH=$JAVA_HOME/bin:$PATH

export JAVA_HOME PATH

exec bash

wget http://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.5.47/bin/apache-tomcat-8.5.47.tar.gz

tar -xvf apache-tomcat-8.5.47.tar.gz 

vim /etc/profile.d/tomcat.sh

CATALINA_BASE=/usr/local/tomcat

PATH=$CATALINA_BASE/bin:$PATH

export CATALINA_BASE PATH

useradd tomcat

chown -R :tomcat ./apache-tomcat-8.5.47/

cd apache-tomcat-8.5.47/

chown -R tomcat logs/ temp/ work/

chmod g+r conf/*

/bin/catalina.sh start

yum install nginx

vim /etc/nginx/nginx.conf

location / {

          root /root/apache-tomcat-8.5.47/webapps/ROOT/;

        }

location ~* \.jsp$ {

            index index.jsp index.html;

            proxy_pass http://192.168.0.133:8080;

        }

systemctl start nginx

nginx -s reload

客户端浏览器访问    http://192.168.0.133:8080

3、搭建Tomcat，并基于memcached实现会话共享

安装第一台tomcat及memcached

yum install /home/admin/下载/jdk-13.0.1_linux-x64_bin.rpm memcached

vim /etc/profile.d/java.sh

JAVA_HOME=/usr/java/latest

PATH=$JAVA_HOME/bin:$PATH

export JAVA_HOME PATH

exec bash

wget http://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.5.47/bin/apache-tomcat-8.5.47.tar.gz

tar -xvf apache-tomcat-8.5.47.tar.gz 

useradd tomcat

chown -R :tomcat ./apache-tomcat-8.5.47/

cd apache-tomcat-8.5.47/

chown -R tomcat logs/ temp/ work/

chmod g+r conf/*

vim conf/server.xml

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

<Context path="/test" docBase="/root/apache-tomcat-8.5.47/webapps/test" reloadable="true">

              <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"

                memcachedNodes="n1:192.168.0.133:11211,n2:192.168.0.143:11211"

                failoverNodes="n1"

                requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"

                transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"

              />

        </Context>

mkdir -pv /root/apache-tomcat-8.5.47/webapps/test/WEB-INF/{classes,lib}

vim /root/apache-tomcat-8.5.47/webapps/test/index.jsp

<%@ page language="java" %>

<html>

  <head><title>TomcatA</title></head>

  <body>

    <h1><font color="red">TomcatA.magedu.com</font></h1>

    <table align="centre" border="1">

      <tr>

        <td>Session ID</td>

    <% session.setAttribute("magedu.com","magedu.com"); %>

        <td><%= session.getId() %></td>

      </tr>

      <tr>

        <td>Created on</td>

        <td><%= session.getCreationTime() %></td>

    </tr>

    </table>

  </body>

</html>

cp /root/{asm-7.2.jar，memcached-session-manager-tc8-2.3.2.jar，objenesis-3.1.jar，kryo-4.0.2.jar，minlog-1.3.1.jar，reflectasm-1.11.9.jar，kryo-serializers-0.45.jar，msm-kryo-serializer-2.3.2.jar，spymemcached-2.12.3.jar，memcached-session-manager-2.3.2.jar}   /root/apache-tomcat-8.5.47/lib/

/bin/catalina.sh start

systemctl start memcached

安装第二台tomcat及memcached

yum install /home/admin/下载/jdk-13.0.1_linux-x64_bin.rpm memcached

vim /etc/profile.d/java.sh

JAVA_HOME=/usr/java/latest

PATH=$JAVA_HOME/bin:$PATH

export JAVA_HOME PATH

exec bash

wget http://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.5.47/bin/apache-tomcat-8.5.47.tar.gz

tar -xvf apache-tomcat-8.5.47.tar.gz

useradd tomcat

chown -R :tomcat ./apache-tomcat-8.5.47/

cd apache-tomcat-8.5.47/

chown -R tomcat logs/ temp/ work/

chmod g+r conf/*

vim conf/server.xml

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

<Context path="/test" docBase="/root/apache-tomcat-8.5.47/webapps/test" reloadable="true">

              <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"

                memcachedNodes="n1:192.168.0.133:11211,n2:192.168.0.143:11211"

                failoverNodes="n1"

                requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"

                transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"

              />

        </Context>

mkdir -pv /root/apache-tomcat-8.5.47/webapps/test/WEB-INF/{classes,lib}

vim /root/apache-tomcat-8.5.47/webapps/test/index.jsp

<%@ page language="java" %>

<html>

  <head><title>TomcatB</title></head>

  <body>

    <h1><font color="blue">TomcatB.magedu.com</font></h1>

    <table align="centre" border="1">

      <tr>

        <td>Session ID</td>

    <% session.setAttribute("magedu.com","magedu.com"); %>

        <td><%= session.getId() %></td>

      </tr>

      <tr>

        <td>Created on</td>

        <td><%= session.getCreationTime() %></td>

    </tr>

    </table>

  </body>

</html>

cp /root/{asm-7.2.jar，memcached-session-manager-tc8-2.3.2.jar，objenesis-3.1.jar，kryo-4.0.2.jar，minlog-1.3.1.jar，reflectasm-1.11.9.jar，kryo-serializers-0.45.jar，msm-kryo-serializer-2.3.2.jar，spymemcached-2.12.3.jar，memcached-session-manager-2.3.2.jar}  /root/apache-tomcat-8.5.47/lib/

/bin/catalina.sh start

systemctl start memcached

搭建nginx服务器：

yum install nginx

http {

      upstream tomcat {

            server 192.168.0.133:8080;

            server 192.168.0.143:8080;

      }

      server {

          listen      8080;

          server_name  192.168.0.241;

          include /etc/nginx/default.d/*.conf;

          location / {

          proxy_pass http://tomcat;

          }

      }

}

systemctl start nginx

nginx -s reload

客户端测试：



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