云原生-Tomcat
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Tomcat安装部署
1.下载安装包
[root@RS1 ~]# wget https://dlcdn.apache.org/tomcat/tomcat-9/v9.0.115/bin/apache-tomcat-9.0.115.tar.gz
2.部署tomcat
[root@RS1 local]# yum install java-1.8.0-openjdk.x86_64 -y
[root@RS1 ~]# tar zxf apache-tomcat-9.0.115.tar.gz -C /usr/local
[root@RS1 ~]# cd /usr/local/
[root@RS1 local]# ls
bin etc games include lib lib64 libexec sbin share src tomcat-9.0-doc
[root@RS1 local]# mv apache-tomcat-9.0.115/ tomcat
[root@RS1 local]# cd tomcat/
[root@RS1 tomcat]# ls
bin conf lib logs README.md RUNNING.txt webapps
BUILDING.txt CONTRIBUTING.md LICENSE NOTICE RELEASE-NOTES temp work
[root@RS1 bin]# ./startup.sh
Using CATALINA_BASE: /usr/local/tomcat
Using CATALINA_HOME: /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME: /usr
Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:
Tomcat started.
[root@RS1 bin]# netstat -antlupe | grep 8080
tcp6 0 0 :::8080 :::* LISTEN 0 139291 10372/java
3.制作tomcat的启动脚本
[root@RS1 bin]# vim /usr/local/tomcat/conf/tomcat.conf
JAVA_HOME=/etc/alternatives/jre
[root@RS1 bin]# vim /lib/systemd/system/tomcat.service
[Unit]
Description=Tomcat
#After=syslog.target network.target remote-fs.target nss-lookup.target
After=syslog.target network.target
[Service]
Type=forking
EnvironmentFile=/usr/local/tomcat/conf/tomcat.conf
ExecStart=/usr/local/tomcat/bin/startup.sh
ExecStop=/usr/local/tomcat/bin/shutdown.sh
PrivateTmp=true
User=tomcat
Group=tomcat
[Install]
WantedBy=multi-user.target
[root@RS1 bin]# useradd -s /sbin/nologin -M tomcat
[root@RS1 bin]# chown tomcat.tomcat /usr/local/tomcat/ -R
[root@RS1 bin]# systemctl daemon-reload
[root@RS1 bin]# systemctl enable --now tomcat
[root@RS1 bin]# netstat -antlupe | grep java
tcp6 0 0 127.0.0.1:8005 :::* LISTEN 1000 139979 10682/java
tcp6 0 0 :::8080 :::* LISTEN 1000 140563 10682/java
Nginx与tomcat的整合
1.单体架构
[root@Nginx conf.d]# cd /usr/local/nginx/conf/conf.d/
[root@Nginx conf.d]# vim vhosts.conf
server {
listen 80;
server_name app.timinglee.org;
location ~* \.jsp$ {
proxy_pass http://192.168.186.10:8080;
}
}
[root@RS1 ~]# cp test.jsp /usr/local/tomcat/webapps/ROOT/
[root@RS1 ~]# scp test.jsp root@192.168.186.20:/usr/local/tomcat/webapps/ROOT/
[root@Nginx conf.d]# nginx -s reload
#在windows中设定app.timinglee.org的解析
#在浏览器中访问 app.timinglee.org/test.jsp
2.tomcat负载均衡
在此之前确保让RS1 RS2两台主机的tomcat启动
[root@Nginx conf.d]# vim vhosts.conf
upstream tomcat {
hash $cookie_JSESSIONID;
server 192.168.186.10:8080;
server 192.168.186.20:8080;
}
server {
listen 80;
server_name app.timinglee.org;
location ~* \.jsp$ {
proxy_pass http://tomcat;
}
}
[root@Nginx conf.d]# nginx -s reload
[root@Nginx conf]# curl -I http://app.timinglee.org/test.jsp | grep JSESSIONID
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:-- 0 352 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
Set-Cookie: JSESSIONID=2AEFDC62BBFD8DA08F6378EA8541DACC; Path=/; HttpOnly
[root@Nginx conf]# curl -I http://app.timinglee.org/test.jsp | grep JSESSIONID
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:-- 0 352 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
Set-Cookie: JSESSIONID=358A8946E96826C6D1EDE72679991548; Path=/; HttpOnly
#在windows浏览器中访问 app.timinglee.org/test.jsp
#在windows的另外一个浏览器中访问 app.timinglee.org/test.jsp
tomcat+memcache实现session会话零丢失
1.tomcat加载模块
[root@RS1 ~]# unzip jar.zip
[root@RS1 ~]# cd jar/
[root@RS1 jar]# cp * /usr/local/tomcat/lib/
[root@RS1 jar]# scp * root@192.168.186.20:/usr/local/tomcat/lib/
2.安装memcache
[root@RS1 jar]# dnf install memcached -y
[root@RS2 ~]# dnf install memcached -y
[root@RS1 ~]# vim /etc/sysconfig/memcached
[root@RS2 ~]# vim /etc/sysconfig/memcached
PORT="11211"
USER="memcached"
MAXCONN="1024"
CACHESIZE="64"
OPTIONS="-l 0.0.0.0,::1"
[root@RS1+2 ~]# systemctl enable --now memcached.service
[root@RS1+2 ~]# netstat -antluple | grep memcached
tcp 0 0 0.0.0.0:11211 0.0.0.0:* LISTEN 988 142615 35756/memcached
tcp6 0 0 ::1:11211 :::* LISTEN 988 142616 35756/memcached
3.配置tomcat
[root@RS1 ]# vim /usr/local/tomcat/conf/context.xml
<Context>
<!-- Default set of monitored resources. If one of these changes, the -->
<!-- web application will be reloaded. -->
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<WatchedResource>WEB-INF/tomcat-web.xml</WatchedResource>
<WatchedResource>${catalina.base}/conf/web.xml</WatchedResource>
<!-- Uncomment this to disable session persistence across Tomcat restarts -->
<!--
<Manager pathname="" />
-->
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="n1:192.168.186.10:11211,n2:192.168.186.20:11211"
failoverNodes="n1"
requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"
transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"
/>
</Context>
[root@RS2 ]# vim /usr/local/tomcat/conf/context.xml
<Context>
<!-- Default set of monitored resources. If one of these changes, the -->
<!-- web application will be reloaded. -->
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<WatchedResource>WEB-INF/tomcat-web.xml</WatchedResource>
<WatchedResource>${catalina.base}/conf/web.xml</WatchedResource>
<!-- Uncomment this to disable session persistence across Tomcat restarts -->
<!--
<Manager pathname="" />
-->
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="n1:192.168.186.10:11211,n2:192.168.186.20:11211"
failoverNodes="n2"
requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"
transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"
/>
</Context>
[root@RS1 ~]# systemctl restart tomcat.service
[root@RS2 ~]# systemctl restart tomcat.service
#验证
#在windows浏览器中访问 app.timinglee.org/test.jsp，刷新网页，观察到server info的变化
[root@RS1 ~]# systemctl stop tomcat.service
[root@RS1 ~]# systemctl start tomcat.service
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