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Tomcat+nginx+keepalived+memcached实现双VIP负载均衡及Session会话保持

發布時間：2023/12/18 编程问答 25 豆豆

生活随笔收集整理的這篇文章主要介紹了 Tomcat+nginx+keepalived+memcached实现双VIP负载均衡及Session会话保持小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

準備好tomcat

第一臺

tar vxf apache-tomcat-7.0.54.tar.gz

mv apache-tomcat-7.0.54 /usr/local/tomcat

tar vxf jdk-7u65-linux-x64.tar.gz

mv jdk1.7.0_65/ /usr/local/java

編輯vim /etc/profile加

export JAVA_HOME=/usr/local/java?????? #設置java根目錄

export PATH=$PATH:$JAVA_HOME/bin? #在PATH環境變量中添加java跟目錄的bin子目錄

啟動tomcat服務

/usr/local/tomcat/bin/startup.sh

?? 打開瀏覽器，ip：8080顯示tomcat主頁

關閉服務；

? /usr/local/tomcat/bin/shutdown.sh

建立一個web 站點

cd webapps/

mkdir web

vim index.jsp

Server Info:??

SessionID:<%=session.getId()%>

<br>

SessionIP:<%=request.getServerName()%>?

<br>

SessionPort:<%=request.getServerPort()%>

<br>

? out.println("server one");

修改Tomcat的server.xml文件

cp server.xml server.xml.bak

vim server.xml

????? <Context docBase="web" path="" reloadable="flase">??????????????????????????????????????????????????

????? </Context>

????? </Host>

/usr/local/tomcat/bin/shutdown.sh

/usr/local/tomcat/bin/startup.sh

打開瀏覽器，ip：8080顯示tomcat主頁

??第二臺

與第一臺基本一致，更改測試頁的ip地址

scp root@172.16.1.2:/usr/local/tomcat/webapps/web/index.jsp .

scp root@172.16.1.2:/usr/local/tomcat/conf/server.xml? .

啟動服務/usr/local/tomcat/bin/startup.sh

查看服務

netstat -anpult |grep java

瀏覽器訪問測試 http://ip:8080

顯示正常

2.準備nginx

第一臺

源碼安裝nginx,

修改配置文件，配置負載均衡

cp /usr/local/nginx/conf/nginx.conf{,.bak}

vim /usr/local/nginx/conf/nginx.conf

加upstream tomcat_server {

??????? server 172.16.1.12:8080 weight=1;

??????? server 172.16.1.2:8080 weight=1;

}

proxy_pass http://tomcat_server;

語法檢查

/usr/local/nginx/sbin/nginx –t

啟動服務/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf

或者killadd -1 nginx

打開瀏覽器訪問: http://ip?，該ip為nginx?的ip，刷新瀏覽器，會顯示兩臺

第二臺

nginx-2服務器配置：

配置方式與服務器nginx-1一致

客戶端測試：

打開瀏覽器訪問: http://ip??? #不斷刷新可看到由于權重相同，頁面會反復切換

3.安裝配置keepalived

yum -y install keepalived

修改配置文件vim keepalived.conf

配置一個實例名字為VI_2，狀態作為主，優先級100

vrrp_instance VI_2 {

??? #備用服務器上為 BACKUP

??? state MASTER

??? #綁定vip的網卡為ens33

??? interface ens33

??? virtual_router_id 51

??? #備用服務器上為90

??? nopreempt????????????????????????????????????????#為不搶占模式

??? priority 100

??? advert_int 1

??? authentication {

??????? auth_type PASS

??????? auth_pass 1111

??? }

????#track_script {

?? ? #nginx

??? #}

??? virtual_ipaddress {?????????????????????????????? #配置虛擬ip地址

??????? 172.16.1.200

??? }

}

vrrp_instance VI_1 {??????????????????????????????????#配置另一個實例?VI_1，狀態為?從，優先級為90

??? state BACKUP

??? interface ens33

??? virtual_router_id 51

??? priority 90

??? advert_int 1

??? authentication {

??????? auth_type PASS

??????? auth_pass 1111

??? }

??? virtual_ipaddress {??????????????????????????????????#配置虛擬ip地址為254

??????? 192.168.200.254

??? }

}

配置第二臺

Vim keepalive.conf

vrrp_instance VI_2 {???????????????????????????????????????????? #實例名字為VI_2，狀態作為從，優先級90

??? #備用服務器上為 BACKUP

??? state SLAVE

??? #綁定vip的網卡為ens33

??? interface ens33

??? virtual_router_id 51

??? #備用服務器上為90

??? nopreempt

??? priority 90

??? advert_int 1

??? authentication {

??????? auth_type PASS

??????? auth_pass 1111

??? }

?????? virtual_ipaddress {

??????? 172.16.1.200?????????????????????????????????????????????????????????#配置虛擬ip地址

??? }

}

vrrp_instance VI_1 {????????????????????????????????????????????????????????? #配置另一個實例?VI_1，狀態為主，優先級為100

??? state MASTER

??? interface ens33

??? virtual_router_id 51

??? priority 100

??? advert_int 1

??? authentication {

??????? auth_type PASS

??????? auth_pass 1111

??? }

??? virtual_ipaddress {

??????? 192.168.200.254

??? }

}

測試，關閉一臺keepalived,打開瀏覽器，刷新頁面，兩臺機器網頁交替更新，測試正常

實現高可用。

4．安裝memcached，實現session會話保持。

yum -y install gcc openssl-devel pcre-devel zlib-devel

先安tar xf libevent-2.0.15-stable.tar.gz

cd libevent-2.0.15-stable

./configure --prefix=/usr/local/libevent && make && make install

再裝memcached?

tar xf memcached-1.4.5.tar.gz

cd memcached-1.4.5

./configure --prefix=/usr/local/memcached --with-libevent=/usr/local/libevent/ && make && make install?

配置

/usr/local/memcached/bin/memcached -u root -m 512M -n 10 -f 2 -d -vvv -c 512

vim /etc/ld.so.conf

include ld.so.conf.d/*.conf

/usr/local/libevent/lib/

Ldconfig

/usr/local/memcached/bin/memcached -u root -m 512M -n 10 -f 2 -d -vvv -c 512

?netstat? -antp| grep :11211

顯示端口開啟

安裝telnet測試yum -y install telnet

telnet 192.168.200.103 11211

顯示正常

最后執行讓Tomcat-1? Tomcat-2 通過（msm）連接到Memcached

?將session包中的“*.jar復制到/usr/local/tomcat/lib/ 下面

cp session/* /usr/local/tomcat/lib/使tomcat支持memcached,?

tomcat-1? 和? tomcat-2?? 配置文件一模一樣.

vim /usr/local/tomcat7/conf/context.xml

重啟服務tomcat

/usr/local/tomcat/bin/shutdown.sh

/usr/local/tomcat/bin/startup.sh

?如果成功，tomcat與Memcached 端口會連在一起，前后有變化

Tomcat-1與Tomcat-2如下圖

netstat -antp|grep java

tcp??????? 0????? 0 ::ffff:127.0.0.1:8005?????? :::*??????????????????????? LISTEN????? 62496/java?????????

tcp??????? 0????? 0 :::8009???????????????????? :::*??????????????????????? LISTEN????? 62496/java?????????

tcp??????? 0????? 0 :::8080?????????? ??????????:::*??????????????????????? LISTEN????? 62496/java?????????

tcp??????? 0????? 0 ::ffff:192.168.200.10:28232 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java?????????

tcp??????? 0????? 0 ::ffff:192.168.200.10:28231 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java?????????

tcp??????? 0????? 0 ::ffff:192.168.200.10:28230 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java?????????

tcp??????? 0????? 0 ::ffff:192.168.200.10:28228 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java?????????

tcp? ??????0????? 0 ::ffff:192.168.200.10:28229 ::ffff:192.168.200.10:11211 ESTABLISHED 62496/java?????????

[root@tomcat-1 ~]# netstat -antp|grep memcached

tcp??????? 0????? 0 0.0.0.0:11211?????????????? 0.0.0.0:*?????????????????? LISTEN????? 62402/memcached ????

tcp??????? 0????? 0 192.168.200.103:11211?????? 192.168.200.103:28230?????? ESTABLISHED 62402/memcached????

tcp?????? 45????? 0 192.168.200.103:11211?????? 192.168.200.103:28228?????? ESTABLISHED 62402/memcached????

tcp??????? 0????? 0 192.168.200.103:11211?????? 192.168.200.103:28232?????? ESTABLISHED 62402/memcached????

tcp??????? 0????? 0 192.168.200.103:11211?????? 192.168.200.103:28229?????? ESTABLISHED 62402/memcached????

tcp??????? 0????? 0 192.168.200.103:11211?????? 192.168.200.103:28231? ?????ESTABLISHED 62402/memcached????

tcp??????? 0????? 0 :::11211??????????????????? :::*??????????????????????? LISTEN????? 62402/memcached???

轉載于:https://www.cnblogs.com/mushou/p/9391942.html

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