Jenkins Deploying Java Applications to Tomcat Server

For Java programs, Jenkins requires the use of build tools such as maven, ant, etc., with maven being more popular. Here we use maven to implement the deployment of Java applications.

Prepare Java code in GitLab

gitlab

Deploy Tomcat and configure it

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apt-get -y install tomcat9 tomcat9-admin
cp -r /usr/share/tomcat9-admin/* /var/lib/tomcat9/webapps/

Open /var/lib/tomcat9/conf/tomcat-users.xml and do the following configuration.

Add the following three lines to create users and authorize them. manager-script for remote script execution privileges
<role rolename="manager-gui"/>
<role rolename="manager-script"/>
<user username="tomcat" password="tomcat" roles="manager-gui,manager-script"/>

Open /var/lib/tomcat9/webapps/manager/META-INF/context.xml and make the following configuration.

Comment the following line. By default, only 127.0.0.1 can be accessed locally, comment it out so that it can be accessed remotely
<! -- 
 <Valve className="org.apache.catalina.valves.RemoteAddrValve"
 allow="127\. \d+\. \d+\. \d+|::1|0:0:0:0:0:0:0:0:1" />
-->

Restart tomcat9 afterwards

Installing maven and tomcat plugins

Maven plugin can implement maven style tasks maven

Deploy to container plugin to connect to tomcat deploy

Jenkins server to install maven and configure image acceleration

`1`	`apt-get -y install maven`

Open the /etc/maven/settings.xml file and do the following configuration.

#Add the following between <mirrors>...</mirrors>
<mirror>
 <id>nexus-aliyun</id>
 <mirrorOf>*</mirrorOf>
 <name>Nexus aliyun</name>
 <url>http://maven.aliyun.com/nexus/content/groups/public</url
</mirror>