How to install Jenkins using Docker

1. Pull the image

The version I installed here is 2.222.3-centos. You can get the version you need here: https://hub.docker.com/_/jenkins?tab=tags

ocker pull jenkins/jenkins:2.222.3-centos

2. Create a local data volume

The path I map the local data volume to is /data/jenkins_home/. You can modify it if you want to put it somewhere else.

-p /data/jenkins_home/

The directory permissions need to be modified because when mapping the local data volume, the owner of the /data/jenkins_home/ directory is the root user, and the uid of the jenkins user in the container is 1000.

-R 1000:1000 /data/jenkins_home/

3. Create a container

docker run -d --name jenkins -p 8040:8080 -p 50000:50000 -v /data/jenkins_home:/var/jenkins_home jenkins/jenkins:2.222.3-centos

illustrate:

• The -d flag allows the docker container to run in the background
• --name defines a container name. If not specified, a random string will be automatically generated as the UUID
• -p 8040:8080 port mapping. My local port 8080 is occupied, so I just mapped a port 8040.
• -p 50000:50000 port mapping
• -v /data/jenkins_home:/var/jenkins_home binds a data volume, /data/jenkins_home is the local data volume just created

4. Configure Jenkins

1. Open Jenkins

Access http://192.168.1.106:8040/ (replace with your own IP and port) through the browser to enter the initial page. If Jenkins has not yet started, the following content will be displayed

2. Enter the administrator password

Here you are required to enter the initial administrator password. According to the prompt, the password is in the file /var/jenkins_home/secrets/initialAdminPassword. Note that this path is in the Docker container, so we get it through the following command

ker exec jenkins cat /var/jenkins_home/secrets/initialAdminPassword
85770376692448b7b6a8e301fb437848

Don't forget that we mapped the local data volume /data/jenkins_home/, so you can also output it with the following command

ata/jenkins_home/secrets/initialAdminPassword 
85770376692448b7b6a8e301fb437848

After entering your password, click Continue

3. Install plugins

Select the recommended plugins to install here, and Jenkins will automatically start installing them. If the plugin installation is slow, please refer to Solve the problem of Jenkins plugin installation being slow (Linux)

After the installation is complete, it will automatically jump to the next step

4. Create an administrator

5. Instance Configuration

Just pay attention to the IP address and port

6. Configuration completed

Notice:

The Jenkins initialization page accessed by 360 browser is in English. Please use Chrome browser instead, which must be in Chinese, so it won’t look uncomfortable.

Reference:
https://segon.cn/install-jenkins-using-docker.html

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