Create a backup directory
Install Thinbackup Plugin
Navigate to ThinBackup and configure
Configure the settings
Full backup happens every 5mins and Incremental backup every 2mins
Restore backup from the dropdown.
Backup any location
mkdir -p /opt/backup
chown -R jenkins:jenkins /opt/backup
ls -lsrt /opt/backup/
total 8
4 drwxr-xr-x 6 jenkins jenkins 4096 Dec 13 10:05 FULL-2022-12-13_10-05
4 drwxr-xr-x 3 jenkins jenkins 4096 Dec 13 10:06 DIFF-2022-12-13_10-06
This Jenkins job will be building the docker image from the Git repo.
Create a pipeline job with Jenkins and add Pipeline Script.
pipeline {
agent any
tools {
// Install the Maven version configured as "M3" and add it to the path.
maven "M3"
}
stages {
stage('Preparation') {
steps {
// Get some code from a GitHub repository
git 'https://github.com/callicoder/spring-boot-websocket-chat-demo.git'
}
}
stage('Build') {
steps {
// To run Maven on a Windows agent, use
sh "mvn -Dmaven.test.failure.ignore=true clean package"
}
post {
// If Maven was able to run the tests, even if some of the test
// failed, record the test results and archive the jar file.
success {
junit '**/target/surefire-reports/TEST-*.xml'
archiveArtifacts 'target/*.jar'
}
}
}
stage('Docker Build') {
steps {
sh 'docker build -t spring-boot-websocket-chat-demo .'
}
}
stage('Deploy') {
steps {
sh 'docker stop app_container'
sh 'docker rm app_container'
sh 'docker run -d -p 5001:8080 --name app_container spring-boot-websocket-chat-demo'
}
}
}
}
Error: - While running pipeline groovy script to build a docker image for spring boot chat demo.
+ docker build -t spring-boot-websocket-chat-demo . Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post "http://%2Fvar%2Frun%2Fdocker.sock/v1.24/build?buildargs=%7B%7D&cachefrom=%5B%5D&cgroupparent=&cpuperiod=0&cpuquota=0&cpusetcpus=&cpusetmems=&cpushares=0&dockerfile=Dockerfile&labels=%7B%7D&memory=0&memswap=0&networkmode=default&rm=1&shmsize=0&t=spring-boot-websocket-chat-demo&target=&ulimits=null&version=1": dial unix /var/run/docker.sock: connect: permission denied [Pipeline] } [Pipeline] // withEnv [Pipeline] } [Pipeline] // stage [Pipeline] stage [Pipeline] { (Deploy) Stage "Deploy" skipped due to earlier failure(s) [Pipeline] } [Pipeline] // stage [Pipeline] } [Pipeline] // withEnv [Pipeline] } [Pipeline] // node [Pipeline] End of Pipeline ERROR: script returned exit code 1 Finished: FAILURE
solution:-
sudo chmod 777 /var/run/docker.sock
from jenkins/jenkins:lts
USER root
RUN apt-get update -qq && apt-get install wget
RUN wget http://apache.cs.utah.edu/maven/maven-3/3.8.6/binaries/apache-maven-3.8.6-bin.tar.gz
RUN tar xzf apache-maven-3.8.6-bin.tar.gz -C /opt/
RUN ln -s /opt/apache-maven-3.8.6 /opt/maven
RUN ln -s /opt/maven/bin/mvn /usr/local/bin
RUN rm -f apache-maven-3.8.6-bin.tar.gz
ENV MAVEN_HOME /opt/maven
RUN chown -R jenkins:jenkins /opt/maven
RUN apt clean
USER jenkins
sudo docker image build -t jenkins-docker .
sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
jenkins-docker latest ca1cb1129c7e 38 seconds ago 505MB
jenkins/jenkins lts 25fa92c47840 8 days ago 463MB
sudo docker run -it -d -p 8080:8080 -p 50000:50000 -v jenkins_home:/var/jenkins_home -v /var/run/docker.sock:/var/run/docker.sock --restart unless-stopped jenkins-docker
sudo docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
7333f25c2524 jenkins-docker "/usr/bin/tini -- /u…" 4 minutes ago Up 4 minutes 0.0.0.0:8080->8080/tcp, :::8080->8080/tcp, 0.0.0.0:50000->50000/tcp, :::50000->50000/tcp silly_sanderson
http://localhost:8080/
#get the admin password
jenkins@7333f25c2524:/$ mvn --version
Apache Maven 3.8.6 (84538c9988a25aec085021c365c560670ad80f63)
Maven home: /opt/maven
Java version: 11.0.16.1, vendor: Eclipse Adoptium, runtime: /opt/java/openjdk
Default locale: en, platform encoding: UTF-8
OS name: "linux", version: "5.15.0-52-generic", arch: "amd64", family: "unix"
jenkins@7333f25c2524:/$ java --version
openjdk 11.0.16.1 2022-08-12
OpenJDK Runtime Environment Temurin-11.0.16.1+1 (build 11.0.16.1+1)
OpenJDK 64-Bit Server VM Temurin-11.0.16.1+1 (build 11.0.16.1+1, mixed mode)
Make a backup copy of a Jenkins config file (If need to restore the previous settings)
cp -r /var/lib/jenkins/config.xml /var/lib/jenkins/config.xml.back
Disable the security
vim /var/lib/jenkins/config.xml
<...>
<useSecurity>false</useSecurity>
<...>
Restart the Jenkins service
systemctl restart jenkins
Go to the Jenkins UI (No credentials this time) and reset the admin password
Navigate to "Manage Jenkins"
In Security "Configure Global Security"
In Security Realm Select "Jenkins’ own user database" and Save
Go to "People" From the Dashboard
Select username and "Configure" Enter a new password in the "Password" and "Confirm password" fields and Save
Once the admin password is reset, restore the /var/lib/jenkins/config.xml file and restart Jenkins
mv /var/lib/jenkins/config.xml.back /var/lib/jenkins/config.xml
systemctl restart jenkins
Issue
! [remote rejected] main -> main (refusing to allow a Personal Access Token to create or update workflow `.github/workflows/maven.yml` without `workflow` scope)
error: failed to push some refs to 'https://github.com/path/filename.git'
Solution
Login GitHub URL
Go to Settings ➡ Developer settings➡Personal access tokens
✔workflow Update GitHub Action workflows
Configure a parameterized build in Jenkins
#Install Plugin - Build With parameters
Jenkins ➡ Manage Jenkins ➡ Manage Plugins ➡ Available ➡ Build With Parameters
Jenkins ➡ New Item ➡ Enter an item name ➡ [ParameterizedDemo] ➡ Freestyle project ➡ OK
General ➡ This project is parameterized ➡ String parameter
Name
my_param
Default Value
Hello
Build Triggers ➡ Trigger builds remotely ➡
Authentication Token
Token_987
Build ➡ dd build step ➡ Execute shell
Command
echo $my_param
Apply-Save
Triggering a parameterized build remotely
#Open the terminal
#curl -X GET <YourJenkinsJobUrl>/buildWithParameters?token=TOKEN_NAME
curl -X GET http://localhost:8080/job/ParameterizedDemo/buildWithParameters?token=Token_987
#Open the job in the Jenkins UI
Build with Parameters ➡ Build ➡ Build history ➡ Console Output
Console Output
Started by user admin
Running as SYSTEM
Building in workspace /var/lib/jenkins/workspace/ParameterizedDemo
[ParameterizedDemo] $ /bin/sh -xe /tmp/jenkins17901601731840577267.sh
+ echo Hello
Hello
Finished: SUCCESS
Tools: Git, GitHub, and Jenkins
1. Create a GitHub repository
Create a new repository ➡ Repository Name ➡ Public ➡ Add a README file ➡ create repository
Code ➡ HTTPS ➡ https://<url> ➡ copy
2. Add build.xml file to the repository
#open terminal
git clone https://<url>
cd Demo-Ant/
vim build.xml
<?xml version="1.0"?>
<project name="Hello World Project" default="info">
<target name="info">
<echo> Hello World - Demo Ant</echo>
</target>
</project>
git init
git add build.xml
git commit -m "Add build file"
git remote -v
git push -u origin main
3. Set the Global Tool Configuration
Jenkins ➡ Manage Jenkins ➡ Global Tool Configuration
Ant-
Ant installations
Add Ant
Ant
Name
[FirstAnt]
Install automatically
Install from Apache
Version
List of Ant installations on this system
Apply ➡ Save
4. Integrate Ant with Jenkins
Jenkins ➡ New Item ➡ Enter an item name ➡ Freestyle project ➡ OK
Source Code Management ➡ Git ➡ Repository URL[https://<url>] ➡ Branch Specifier[*/main]
Build ➡ Add build step ➡ Invoke Ant ➡ Ant Version[FirstAnt]
Apply ➡ Save
Build Now ➡ Build History ➡ Console Output
sudo vi /var/lib/jenkins/config.xml
<useSecurity>true</useSecurity>
#modify to
<useSecurity>false</useSecurity>
sudo systemctl restart jenkins
Navigate to the web console
Notice that you were not prompted for a username or password
do the following.
Click on People on the left-hand navigation menu.
Click on the Admin
Delete the user account
Navigate to Manage Jenkins
Click on Configure Global Security
Under Security Realm, select Jenkins’ own user database
In the Authorization section, select Logged-in users can do anything
Unselect Allow anonymous read access
Save changes
It will redirect to a page where a new Admin user can be created
#try by specifying the right path
http://localhost:8080/securityRealm/firstUser
#not working? repeat the above steps after the following
sudo mv /var/lib/jenkins/users/* /tmp/jenkins
Ref: - serverlab.ca
Add JDK Maven and Git Plugins with Jenkins in local
Login Jenkins⇒Manage Jenkins⇒Manage Plugins⇒available(search maven)⇒Maven Integration(Install without restart)
http://localhost:8080/updateCenter/ #to view
#in terminal
sudo apt install maven
mvn -version
Apache Maven 3.6.3
Maven home: /usr/share/maven
Java version: 11.0.13, vendor: Ubuntu, runtime: /usr/lib/jvm/java-11-openjdk-amd64
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "5.13.0-28-generic", arch: "amd64", family: "unix"
Add JDK
Login Jenkins⇒Manage Jenkins⇒Global Tool Configuration⇒add JDK
#Name
local_java
#JAVA_HOME
/usr/lib/jvm/java-11-openjdk-amd64
#uncheck Install automatically
save
Add maven
Login Jenkins⇒Manage Jenkins⇒Global Tool Configuration⇒add maven
#Name
local_maven
#MAVEN_HOME
/usr/share/maven
#uncheck Install automatically
save
Add Git
git --version
git version 2.25.1
Login Jenkins⇒Manage Jenkins⇒Global Tool Configuration⇒add maven
#Name
localGit
#Path to Git executable
/bin/git
#uncheck Install automatically
save
To Install Jenkins on Ubuntu 20.04
#java
java --version
openjdk 11.0.13 2021-10-19
#add jenkins public key
wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
OK
#add jenkins repository
sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'
sudo apt update
sudo apt install jenkins
#service status
sudo service jenkins status
Ctrl+C #exit
sudo systemctl start jenkins
sudo service jenkins status
#In the browser
http://localhost:8080/
#to get Administrator password
sudo cat /var/lib/jenkins/secrets/initialAdminPassword
#Follow the pages to complete
Install suggested plugins
Create Frist Admin User
Instance Configuration
Jenkins is Ready!
Jenkins⇒Manage Jenkins⇒Jenkins CLI⇒download "jenkins-cli.jar"
#or go to http://localhost:8080/cli/
sudo java -jar jenkins-cli.jar -s http://localhost:8080/ -version
Version: 2.319.3
Add JDK Maven and Git Plugins with Jenkins
Ref:- how-to-install-jenkins-on-ubuntu-20-04
sudo yum install java
Start/Stop