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https://github.com/cloudacademy/jenkins-cicd-intro

Jenkins CICD Introduction Demo Code and Configs
https://github.com/cloudacademy/jenkins-cicd-intro

cicd cloudacademy devops jenkins pipeline

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Jenkins CICD Introduction Demo Code and Configs

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README 

        
# Jenkins CICD Introduction Demo Code and Configs



Contains Jenkins code and configuration examples as used within the [Introduction to CI/CD with Jenkins](https://cloudacademy.com/course/jenkins-cicd/build-pipelines-declarative) course.



## Demo 4: Install Jenkins - EC2 Ubuntu



Install intructions for Ubuntu 18.04



```

sudo -s

apt-get update

apt-get install -y openjdk-8-jdk

java -version

wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key | sudo apt-key add -

sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'

apt-get update

apt-get install -y jenkins

```



```

systemctl status jenkins

ps -ef | grep jenkins  

ufw status

ufw allow 8080

```



```

cat /var/lib/jenkins/secrets/initialAdminPassword

```



## Demo 5: Install Jenkins - Docker Compose



```

mkdir jenkins-docker

cd jenkins-docker

```



```

docker network create -d bridge devnetwork

```



docker-compose.yml



```

version: "3.5"

services:

    jenkins:

        container_name: jenkins-docker

        image: jenkins/jenkins:lts

        ports:

            - 8080:8080

        networks:

            - devnetwork

networks:

    devnetwork:

        name: devnetwork

```



```

docker-compose config

```



```

docker-compose up -d && docker-compose logs -f

```



```

docker ps

```



```

docker exec -it jenkins-docker bash

```



```

docker exec -it jenkins-docker /var/lib/jenkins_home/secrets/initialAdminPassword 

```



## Demo 6: Create Basic Freestyle Project



UI instructions only



## Demo 7: Create Basic Freestyle Project



UI instructions only



## Demo 8: Building a GitHub Stored Project



Refs

https://github.com/cloudacademy/react-webapp



Notes: 

* this demo assumes ```yarn``` (1.22.x) and ```node``` (8.x) have already been installed and is available on the host that the Jenkins service is running on.

* ```node``` version 8.x is required for the ```yarn build``` to complete successfully



### Install and Setup yarn and node locally (MacOS)



If you are running Jenkins locally on MacOS then perform the following instructions to install ```yarn``` and ```node```



```

brew install yarn

yarn --version

which yarn

```



```

brew install n

sudo n 8.10.0

node --version

which node

```



### Jenkins Script



Update the PATH and preappend ```/usr/local/bin``` to it - so that ```yarn``` can be found by the Jenkins service when the build is executed



```

PATH=/usr/local/bin:$PATH

echo $PATH

yarn --version

node --version

yarn install

yarn build

ls -la

echo finished!!

```



## Demo 9: Build Triggers with GitHub Hooks



Documentation

https://api.github.com/meta



Refs

https://github.com/cloudacademy/react-webapp



## Demo 13: Build Pipelines - Maven



Uses provided sample pipeline within the Jenkins UI



## Demo 14: Build Pipelines - Scripted



```

def int fibonacci(int n){

    n < 2 ? n : fibonacci(n-1) + fibonacci(n-2)

}



node{

    def workspace = pwd()

    echo "workspace = ${workspace}"



    def nine = 9

    def ten = nine + 1



    stage('Calculate'){

        try{

            if(ten > nine){

                echo "${fibonacci(ten)}"

                sh returnStdout: true, script: 'script-which-doesnt-exist.sh'

            }

        }

        catch(exc){

            echo "some exception just happened!!" 

        }



    }

}

```



## Demo 15: Build Pipelines - Gradle



Refs

https://github.com/cloudacademy/devops-webapp



Website

https://crontab.guru/



```

H/5 * * * *

```



```

//START-OF-SCRIPT

node {

    def GRADLE_HOME = tool name: 'gradle-4.10.2', type: 'hudson.plugins.gradle.GradleInstallation'

    sh "${GRADLE_HOME}/bin/gradle tasks"



    stage('Clone') {

        git url: 'https://github.com/cloudacademy/devops-webapp.git'

    }



    stage('Build') {

        sh "${GRADLE_HOME}/bin/gradle build"

    }



    stage('Archive') {

        archiveArtifacts 'build/libs/*.war'

    }

}

//END-OF-SCRIPT

```



```

sudo apt-get install -y tree

cd /var/lib/jenkins/workspace/BuildJob6

ls -la

cd build

tree

```



====================



## Demo 16: Build Pipelines - Declarative



Refs

https://github.com/cloudacademy/devops-webapp



```

pipeline {

    agent {

        label 'master'

    }

    tools {

        gradle 'gradle-4.10.2'

    }

    environment {

        VERSION = "jellybean"

    }

    stages{

        stage('Checkout') {

            steps {

                checkout([$class: 'GitSCM',

                    branches: [[name: 'master']],

                    extenstions: [[$class: 'WipeWorkspace']],

                    userRemoteConfigs: [[url: 'https://github.com/cloudacademy/devops-webapp.git']]



                ])

            }

        }

        stage('Details') {

            steps {

                echo "Running ${env.BUILD_ID} on ${env.JENKINS_URL}"

                echo "${env.VERSION}"

            }



            when {

                environment name: 'VERSION', value: 'jellybean'

            }

        }

        stage('Build') {

            steps {

                sh "gradle build"

            }

        }

    }

}

```