jenkins-jdk8.0 environment preparation and deployment process

1. Environmental preparation

1.1 Install Java

Jenkins depends on Java to run and needs to be installedJDK 8 or JDK 11(Selected according to Jenkins version):

Download JDK:

Install JDK and configure environment variables:

Verify installation:

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java -version

• Oracle JDK 8(Register an account in the historical version)

• OpenJDK 8

• Create new system variablesJAVA_HOME, the value is the JDK installation path (such asC:\Program Files\Java\jdk1.8.0_361）。

• existPathAdded in%JAVA_HOME%\bin。

2. Download the Jenkins WAR package

• Visit the official Jenkins repository and select the version (need to be compatible with your Java version):

  • Supports older versions of Java 8(such as 2.):
    /war-stable/2.346.3/

  • New version of Jenkins(Java 11+ required):
    /download/→ Select "Generic Java package (.war)"

• Will downloadSave to local directory (such asC:\jenkins）。

3. Run the Jenkins WAR package

3.1 Direct run (temporary test)

Open the command prompt and enterDirectory:

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cd C:\jenkins

Start Jenkins:

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java -jar  --httpPort=8080

• --httpPort: Specify the port (default8080, if conflicts can be changed to8081wait).

• The console will output the initial administrator password (note it down and use it for later).

• Browser access:
  http://localhost:8080

3.2 Register as Windows Service (running in the background)

When running the WAR package directly, closing the command line window causes Jenkins to stop. Recommended registration as a system service:

• Install WinSW (Windows Service Wrapper)：

  • downloadWinSW,choose.exeFiles (such as）。

  • WillRename to, and copy toC:\jenkinsTable of contents.

Create a configuration file：
existC:\jenkinsNew file is created, the content is as follows:

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run

<service>
  <id>jenkins</id>
  <name>Jenkins</name>
  <description>Jenkins CI Server</description>
  <executable>java</executable>
  <arguments>-jar "C:\jenkins\" --httpPort=8080</arguments>
  <logmode>rotate</logmode>
  <onfailure action="restart" />
</service>

• Installation Service：

Open a command prompt as an administrator:

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cd C:\jenkins
 install

Start the service：

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net start jenkins

• Service status management:

  • Stop service:net stop jenkins

  • Uninstall the service: uninstall

4. Initialize Jenkins

• Browser accesshttp://localhost:8080。

• Get the initial administrator password：

  • The password file path is displayed in the startup log (if it is started through the service, check it%JENKINS_HOME%\secrets\initialAdminPassword, the default path isC:\Users\<username>\.jenkins）。

• Install plug-ins：

  • Select the recommended plugin or custom installation.

• Create an administrator account：

  • Set username, password, and email.

5. Configure Jenkins

• Global tool configuration：

  • EnterManage Jenkins > Global Tool Configuration, configure JDK, Maven, Git and other paths.

• Plug-in Management：

  • Install commonly used plug-ins (such as Git, Pipeline, SSH).

6. Frequently Asked Questions

6.1 Port conflict

Modify startup parameters:

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java -jar  --httpPort=8081

6.2 Service startup failed

• Check log files:
  WinSW's log is locatedC:\jenkins\。

• make surejavaThe command isPathaccessible.

6.3 Plug-in installation slow

Replace the domestic mirror source:

EnterManage Jenkins > Manage Plugins > Advanced。

ReviseUpdate SiteThe URL is:

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/jenkins/updates/

7. Data directory migration (optional)

The default Jenkins data is stored inC:\Users\<username>\.jenkins. If migration is required:

• Stop the Jenkins service.

• copy.jenkinsFolder to a new location (such asD:\jenkins_home）。

• Set environment variablesJENKINS_HOMEPoint to the new path.

• Restart the service.

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