title: Centos7 installs the correct posture of Tomcat8 pseudo-cluster and sets the boot self-start practice notes

categories: [Tomcat8 cluster,Centos 7]
tags: [Tomcat8 cluster,Centos 7] ##

**I use centos7X64 minimal installation **CentOS-7-x86_64-Minimal-1708

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Students who have not installed jdk, please move to the article of [centos7 install jdk8 in the correct posture and set the boot-up] article

1. Configure the firewall:

Either turn off the firewall or join the release port

1.1 Turn off the firewall directly###

systemctl stop firewalld.service #Stop firewall
systemctl disable firewalld.service #Prohibit firewall startup
firewall-cmd --state #View the default firewall status (notrunning will be displayed after it is turned off, and running after it is turned on)

[ root@localhost ~]# firewall-cmd --state
not running
[ root@localhost ~]#

1.2 Add release port###

firewall-cmd --zone=public--add-port=18080/tcp --permanent #Add release port(--permanent takes effect permanently, it will become invalid after restart without this parameter)
firewall-cmd --zone=public--add-port=28080/tcp --permanent #Add release port(--permanent takes effect permanently, it will become invalid after restart without this parameter)
firewall-cmd --zone=public--add-port=38080/tcp --permanent #Add release port(--permanent takes effect permanently, it will become invalid after restart without this parameter)

firewall-cmd --reload #Refresh the firewall to take effect

firewall-cmd --zone=public--list-ports #View the firewall release port list

[ root@localhost ~]# firewall-cmd --zone=public--add-port=18080/tcp --permanent #Add release port(--permanent takes effect permanently, it will become invalid after restart without this parameter)
success
[ root@localhost ~]# firewall-cmd --zone=public--add-port=28080/tcp --permanent #Add release port(--permanent takes effect permanently, it will become invalid after restart without this parameter)
success
[ root@localhost ~]# firewall-cmd --zone=public--add-port=38080/tcp --permanent #Add release port(--permanent takes effect permanently, it will become invalid after restart without this parameter)
success
[ root@localhost ~]# firewall-cmd --reload #Refresh the firewall to take effect
success
[ root@localhost ~]# firewall-cmd --zone=public--list-ports #View the firewall release port list
80 /tcp 8080/tcp 18080/tcp 28080/tcp 38080/tcp
[ root@localhost ~]#

2. Install wget

yum -y install wget

3. Download tomcat8

wget http://mirrors.shuosc.org/apache/tomcat/tomcat-8/v8.5.24/bin/apache-tomcat-8.5.24.tar.gz

4. Unzip##

tar -zxvf apache-tomcat-8.5.24.tar.gz

5. Move to /usr/local

mv apache-tomcat-8.5.24/usr/local/tomcat8-node1

6. Configure tomcat jdk environment variables##

vi /usr/local/tomcat8-node1/bin/catalina.sh

Add the following code in front of OS specific support.:

JAVA_HOME=/usr/local/java/jdk1.8.0_151
JRE_HOME=$JAVA_HOME/jre

7. Copy two copies of tomcat8-node1 and rename them to tomcat8-node2, tomcat8-node3

cp /usr/local/tomcat8-node1 /usr/local/tomcat8-node2
cp /usr/local/tomcat8-node1 /usr/local/tomcat8-node3

8. Modify tomcat8-node1, tomcat8-node2 and tomcat8-node3 ports in three places##

vi /usr/local/tomcat8-node1/conf/server.xml
vi /usr/local/tomcat8-node2/conf/server.xml
vi /usr/local/tomcat8-node3/conf/server.xml

< Server port="8005" shutdown="SHUTDOWN"><Connector port="8080" protocol="HTTP/1.1" redirectPort="8443"/><Connector port="8009" protocol="AJP/1.3" redirectPort="8443"/>

**It is customarily changed to: **

tomcat8-node1:180051808018009
tomcat8-node2:280052808028009
tomcat8-node3:380053808038009

7. Configure tomcat8-node1, tomcat8-node2, tomcat8-node3 boot up##

in/usr/lib/systemd/Add tomcat8 in the system directory-node1.service,tomcat8-node2.service,tomcat8-node3.service file, the specific content is as follows:

vi /usr/lib/systemd/system/tomcat8-node1.service

[ Unit]
Description=Tomcat
After=syslog.target network.target remote-fs.target nss-lookup.target
  
[ Service]
Type=oneshot
ExecStart=/usr/local/tomcat8-node1/bin/startup.sh
ExecStop=/usr/local/tomcat8-node1/bin/shutdown.sh
ExecReload=/bin/kill -s HUP $MAINPID
RemainAfterExit=yes

[ Install]
WantedBy=multi-user.target

vi /usr/lib/systemd/system/tomcat8-node2.service

[ Unit]
Description=Tomcat
After=syslog.target network.target remote-fs.target nss-lookup.target
  
[ Service]
Type=oneshot
ExecStart=/usr/local/tomcat8-node2/bin/startup.sh
ExecStop=/usr/local/tomcat8-node2/bin/shutdown.sh
ExecReload=/bin/kill -s HUP $MAINPID
RemainAfterExit=yes

[ Install]
WantedBy=multi-user.target

vi /usr/lib/systemd/system/tomcat8-node3.service

[ Unit]
Description=Tomcat
After=syslog.target network.target remote-fs.target nss-lookup.target
  
[ Service]
Type=oneshot
ExecStart=/usr/local/tomcat8-node3/bin/startup.sh
ExecStop=/usr/local/tomcat8-node3/bin/shutdown.sh
ExecReload=/bin/kill -s HUP $MAINPID
RemainAfterExit=yes

[ Install]
WantedBy=multi-user.target

8. Allow tomcat8-node1, tomcat8-node2, tomcat8-node3 to start on boot##

systemctl enable tomcat8-node1
systemctl enable tomcat8-node2
systemctl enable tomcat8-node3

9. tomcat8 common commands##

systemctl enable tomcat8-node1.service    //Boot tomcat

systemctl disable tomcat8-node1.service    //Disable boot tomcat

systemctl start tomcat8-node1.service    #Start tomcat

systemctl stop tomcat8-node1.service    #Close tomcat

systemctl restart tomcat8-node1.service   #Restart tomcat

systemctl status tomcat8-node1.service   #View status tomcat

systemctl enable tomcat8-node1.service   #Allow boot-up

Centos7 install the correct posture of the Tomcat8 pseudo cluster and set the boot self-start practice notes