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Build-Continuous-Integration-with-Jenkins-and-Dokcer

Prerequisite

•	Install Ubuntu and Docker  - https://docs.docker.com/engine/installation/linux/ (OR)

•	Install Docker Toolbox in windows - https://docs.docker.com/docker-for-windows/

Jenkins + DInD (Docker – In – Docker)

•	This includes Docker installation inside of Jenkins.

•	This maintains the created containers as children.

•	This would be preferable if want to manage a complete clean Docker environment inside Jenkins.

Jenkins + DOOD (Docker – Outside – Of – Docker):

•	This uses underlying host’s Docker installation.

•	This maintains the created containers as siblings.

Advantages:

    •	Enables sharing of images with host OS
    
          o	Eliminates storing images multiple times
          
          o	Makes it possible for Jenkins to automate local image creation
          
    •	Eliminates a virtualization layer (lxc)
    
    •	Any settings in the host’s Docker daemon will apply to Jenkins container as well
    
    •	Easier to set up, just need to map the host’s Docker executable and daemon socket on to the container
    
    •	Host and Jenkins container will use the same version of Docker, always.
    
    •	No privileged mode needed
    
    •	Permits the jenkins user to run docker without the sudo prefix.
    
    •	Allows greater flexibility at runtime.
    
    •	Ability to reuse the image cache from the host.

Note: In general, for testing and production environment, DOOD is chosen instead of DinD

Docker Toolbox Overview:

    1.	Once Docker Toolbox installed in windows , will be seen two shortcuts on desktop as below

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    2.	Double-Click the “Docker Quick start Terminal” shortcut icon, execute the command 
    “pwd “will come to know which directory mapped on windows.

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    3.	Create a directory for workspace by executing the command “mkdir docker-workspace”

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    4.	All the successive steps mentioned will be followed by considering the above mentioned directory 
    as base directory. (For instance, here base directory - /c/users/Administrator/docker-workspace) 

Install Jenkins Master (with DOOD):

    1.	Create a directory “Jenkins” under “docker-workspace” directory by executing the command
    “mkdir Jenkins”

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    2.	Create a directory “Master” under “Jenkins” directory by executing the command “mkdir Master”

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    3.	Create a file with name “Dockerfile” under “Master” directory and fill with the below content

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                FROM jenkins:latest
                MAINTAINER Kranthi Kumar Bitra <[email protected]>

                USER root
                RUN apt-get update \
                && apt-get install -y sudo supervisor \
                && rm -rf /var/lib/apt/lists/*

                RUN curl -sSL https://get.docker.com/ | sh

                RUN usermod -aG docker root

                USER root
                RUN mkdir -p /var/log/supervisor
                RUN mkdir -p /var/log/jenkins
                RUN curl -L "https://cli.run.pivotal.io/stable?release=linux64-binary&source=github" | tar -zx
                RUN /cf install-plugin https://static-ice.ng.bluemix.net/ibm-containers-linux_x86 -f
                COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
                CMD /usr/bin/supervisord -c /etc/supervisor/conf.d/supervisord.conf
                
    4.	Create a file with name “supervisord.conf”  under “Master” directory , fill with the below content

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                [supervisord]
                user=root
                nodaemon=true

                [program:chown]
                priority=20
                command=chown -R root:root /var/jenkins_home

                [program:root]
                user=root
                autostart=true
                autorestart=true
                command=/usr/local/bin/jenkins.sh
                redirect_stderr=true
                stdout_logfile=/var/log/jenkins/%(program_name)s.log
                stdout_logfile_maxbytes=10MB
                stdout_logfile_backups=10
                environment = JENKINS_HOME="/var/jenkins_home",HOME="/var/jenkins_home",USER="root"
    
    5.	Create a file with name “plugins.txt” under “Master” directory , fill with the below content

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                structs:latest
                workflow-step-api:latest
                workflow-scm-step:latest
                scm-api:latest
                scm-sync-configuration:latest
                credentials:latest
                mailer:latest
                junit:latest
                subversion:latest
                script-security:latest
                matrix-project:latest
                ssh-credentials:latest
                git-client:latest
                git:latest
                greenballs:latest
                ssh-slaves:latest
                token-macro:latest
                durable-task:latest
                docker-plugin:latest
    
    6.	Create a file with name “docker-compose.yml” under “Master” directory, fill with the below content

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                myjenkins:
                    image: myjenkins_cloudfoundary_dood 
                    volumes:
                        - /var/run/docker.sock:/var/run/docker.sock
                        - ./jenkins_home:/var/jenkins_home
                    ports:
                        - "8080:8080"
                        - "50000:50000"
    7.	In command prompt, go to the directory where the above four files exists, execute the below commands
    to start Jenkins with DOOD.
    
            a.	docker build –t myjenkins_cloudfoundary_dood .  (this will take few minutes time to build 
            the image – only one time should execute)

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            b.	In order to confirm whether the image got created, execute the command 
            -  “ docker images myjenkins_cloudfoundary_dood”

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            c.	docker-compose up

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            d.	In order to confirm whether the Jenkins process created or not , execute the command 
            – “docker ps –a” which should be in “Up” status

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Jenkins Master Initial Configuration (One time Configuration)

•	Access the Jenkins in windows with url – http://192.168.99.100:8080 . 
Once this got accessed, will be seen “Unlock Jenkins” page.

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•	To get the administrator password, go to the “/c/users/Administrator/docker-workspace/
Jenkins/Master/jenkins_home/secrets” directory. In that open the “initialAdminPassword” file.

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•	Copy the content from the above file and paste in the “Administrator password” text area 
and click “Continue” button.

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•	Now, it will redirect to “Customize Jenkins”  page and select the “Install suggested plugins”

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•	After few minutes, all the suggested plugins will be installed automatically.

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•	Now, it will redirect to “Create First Admin User”, enter the user details and click 
“Save and Finish” button.

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•	Now, will get set up complete page, click the “Start using Jenkins” button.

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•	Click the “Manage Jenkins” link in order to install few plugins required for this Continuous 
Integration.

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•	Now, click the “Manage Plugins” link to go to “Plugin Manager” page.

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•	Select the “Available” Tab and using the “Filter” select all the below mentioned plugins and 
click “Install without restart” button
                        Build Pipeline Plugin
                        Build Grpah View Plugin
                        Node and Label Parameter Plugin
                        Docker Plugin
                        Docker Commons Plugin
                        Docker Build Step Plugin
                        Copy Artifact Plugin
                        Groovy
                        HTML Publisher Plugin

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•	Once all plugins installed , will be changed the status from “Pending” to “Success”

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•	Go to “Manage Jenkins” and click the “Manage Nodes” link to create slave jnlp agents.

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•	In order to create slave node, click the “New Node” link

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•	Name the node as “agent1”, select the ‘Permanent Agent” radio button and click “OK” button.

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•	Mention the Remote root directory “/var/jenkins_home” and click the “Save” button.

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•	Repeat the above 3 steps for created nodes – “agent2” and “agent3”
•	Once 3 nodes created, will be seen the agents as below under “Manage Nodes” link.

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•	Now, select the each agent, copy the secret key which will be used for creation of Jenkins 
slave Jnlp agents.

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•	Download the apache maven from - https://maven.apache.org/download.cgi 
•	Copy the maven folder to ““/c/users/Administrator/docker-workspace/Jenkins/Master
/jenkins_home” directory

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•	Go to “Manage Jenkins” and click the “Global Tool Configuration” link to set the maven path

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•	Select ‘Add Maven”, un-check the “Install automatically, specify the “Name” as 
“'Maven_3.3.9”, “MAVEN_HOME” as /var/Jenkins_home/apache-maven-3.3.9” and click the “Save” button.

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Install Private Registry with nginx enabled (for proxy):

•	Create a directory with name “registry” under “docker-workspace” directory by executing the 
command “mkdir registry”

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•	Go to directory – “registry” , create two sub directories – “nginx” and “data”

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•	In “registry” folder, create a file with name “docker-compose.yml”, fill with the below content

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                        nginx:
                            image: "nginx:latest"
                            ports:
                                - 5043:443
                            links:
                                - registry:registry
                            volumes:
                                - ./nginx/:/etc/nginx/conf.d
                        registry:
                                image: registry:2
                            ports:
                                - 5000:5000
                            environment:
                                REGISTRY_STORAGE_FILESYSTEM_ROOTDIRECTORY: /data
                            volumes:
                                - ./data:/data
•	Go to the “nginx” folder, create a file with name “registry.conf”, fill with the below content

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                        upstream docker-registry {
                            server registry:5000;
                        }
                        server {
                            listen 443;
                            server_name myregistrydomain.com;
                            # SSL
                            # ssl on;
                            # ssl_certificate /etc/nginx/conf.d/domain.crt;
                            # ssl_certificate_key /etc/nginx/conf.d/domain.key;
                            # disable any limits to avoid HTTP 413 for large image uploads
                            client_max_body_size 0;
                            # required to avoid HTTP 411: see Issue #1486 
                            (https://github.com/docker/docker/issues/1486)
                            chunked_transfer_encoding on;
                            location /v2/ {
                                # Do not allow connections from docker 1.5 and earlier
                                # docker pre-1.6.0 did not properly set the user agent on ping,
                                catch "Go *" user agents
                                if ($http_user_agent ~ "^(docker\/1\.(3|4|5(?!\.[0-9]-dev))|Go ).*$" ) {
                                    return 404;
                                }
                                # To add basic authentication to v2 use auth_basic setting plus add_header
                                # auth_basic "registry.localhost";
                                # auth_basic_user_file /etc/nginx/conf.d/registry.password;
                                # add_header 'Docker-Distribution-Api-Version' 'registry/2.0' always;
                            proxy_pass                          http://docker-registry;
                        proxy_set_header  Host              $http_host;   # required for docker client's sake
                            proxy_set_header  X-Real-IP         $remote_addr; # pass on real client's IP
                            proxy_set_header  X-Forwarded-For   $proxy_add_x_forwarded_for;
                            proxy_set_header  X-Forwarded-Proto $scheme;
                            proxy_read_timeout                  900;
                            }
                        }
•	Go to “registry” folder , execute the below command to run the private registry
        o	docker-compose up

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        o	In order to confirm whether the registry related process created or not , execute the
        command – “docker ps –a” which should be in “Up” status

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Install Jenkins jnlp slave agents

•	Create a directory “Slaves” under “Jenkins” directory by executing the command “mkdir Slaves”

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•	Create 3 directories – “agent1”, “agent2” and “agent3” under “Slaves” directory

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•	Now repeat the below steps under each agent directory.
•	Create a file with name “Dockerfile” and fill with the below content

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                FROM java:8-jdk
                MAINTAINER Kranthi Kumar Bitra <[email protected]>
                
                ENV HOME /var/jenkins_home
                RUN useradd -c "Jenkins user" -d $HOME -m jenkins
                RUN usermod -G users jenkins
                
                USER root
                RUN apt-get update \
                && apt-get install -y sudo supervisor \
                && rm -rf /var/lib/apt/lists/*
                
                RUN curl -sSL https://get.docker.com/ | sh
                RUN usermod -aG docker jenkins
                
                USER root
                RUN mkdir -p /var/log/supervisor
                RUN mkdir -p /var/log/Jenkins
                RUN curl -L "https://cli.run.pivotal.io/stable?release=linux64-binary&source=github" | tar -zx
                RUN /cf install-plugin https://static-ice.ng.bluemix.net/ibm-containers-linux_x86 -f
               
                COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
                CMD /usr/bin/supervisord -c /etc/supervisor/conf.d/supervisord.conf
               
                RUN curl -A "Mozilla/5.0" --create-dirs -sSLo /usr/share/jenkins/slave.jar
                http://repo.jenkins-ci.org/public/org/jenkins-ci/main/remoting/2.53/remoting-2.53.jar  
                && chmod 755 /usr/share/jenkins  && chmod 644 /usr/share/jenkins/slave.jar
                
                COPY jenkins-slave /usr/local/bin/jenkins-slave
                
                WORKDIR /var/jenkins_home
                USER jenkins
•	Create a file with name “supervisord.conf”  , fill with the below content

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                [supervisord]
                user=root
                nodaemon=true

                [program:chown]
                priority=20
                command=chown -R jenkins:jenkins /var/jenkins_home

                [program:jenkins]
                user=jenkins
                autostart=true
                autorestart=true
                command=/usr/local/bin/jenkins.sh
                redirect_stderr=true
                stdout_logfile=/var/log/jenkins/%(program_name)s.log
                stdout_logfile_maxbytes=10MB
                stdout_logfile_backups=10
                environment = JENKINS_HOME="/var/jenkins_home",HOME="/var/jenkins_home",USER="jenkins"
•	Create a file with name “docker-compose.yml”, fill with the below content

1

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                myjenkinsAgent:
                    image: myjenkins_cloudfoundary_dood_jnlp_agent
                    command:
                        java -jar /usr/share/jenkins/slave.jar -jnlpUrl
                        http://192.168.99.100:8080/computer/agent1/slave-agent.jnlp -secret
                        4f9b27619dc67a88161e05d6afe36b0508643b74989e5cf29e80c89ace3075a8
                    volumes:
                        - /usr/local/bin/docker:/bin/docker
                        - /var/run/docker.sock:/var/run/docker.sock
                        
•	In command prompt, go to the directory where the above three files exists, execute the below 
commands to start Jenkins slave as a jnlp agent.
            o	docker build –t myjenkins_cloudfoundary_dood_jnlp_agent .  
            (this will take few minutes time to build the image – only one time should execute)
            
            o	In order to confirm whether above step success or not , check with the command 
            mentioned in below image

7

            o	docker-compose up
            
            o	In order to confirm 3 slave agent process created or not , check with the command 
            mentioned in below image

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Jenkins Workflow

Build Graph View

1.	Job to create artefact for the “product catalogue” spring-boot project.
        •	Source Code Management – Given the Git Project URL

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        •	Build Triggers – This get executed whenever a change is pushed to GitHub

2

        •	Build – Create a jar for spring-boot project

3

        •	Post-build Actions – will archive the artefacts which will be used by successor Jenkins jobs

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2.	Job to build docker image for the “product catalogue” spring-boot project. 
        •	Build Triggers – This will get executed only when the above artefact project build is stable

6

        •	Build - Copying artefacts generated from the previous project

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        •	Build – Build docker image for the product-catalogue project

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3.	Job to publish the docker image to private registry
        •	Build Triggers – This will get executed only when the above build docker image is stable

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        •	Build – publish image to docker registry

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4.	Job  to run the project as docker container from the published image of docker registry
        •	Build Triggers - This will get executed only when the above publish docker image is stable

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        •	Build – run the published image from docker registry

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5.	Build Graph View

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Build Pipeline View

1.	Instead of “Freestyle project”, select project type as “Pipeline”

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2.	Under “Build Triggers” tab, select the option “The project is parameterized” and add a parameter 
by selecting type as “Node”. Here, we can ensure how many nodes can be involved while executing a 
pipeline as below

2

3.	Write the pipeline script with clear functionality to be performed at each stage of the workflow
                stage 'Create artifact'
                    node ('agent1’'){
                        git url: 'https://github.com/kranthiB/product-catalogue-service.git'
                        def mvnHome = tool 'Maven_3.3.9'
                        sh "${mvnHome}/bin/mvn clean install -DskipTests"
                    }
                stage 'Archive artifact'
                    node{
                        archive '**/*.jar,**/Dockerfile'
                    }
                stage 'Create artifact'
	                node ('master'){
                        git url: 'https://github.com/kranthiB/product-catalogue-service.git'
                        def mvnHome = tool 'Maven_3.3.9''
                        sh "${mvnHome}/bin/mvn clean package"
                    }
                stage 'Archive artifact'
	                node  {
                        archive '**/*.jar,**/Dockerfile'
                    }    
                stage 'Build Docker Image'
	                node('master') {
                            sh "cp ~/workspace/Product_Catalog_Local_Pipeline/target/
                            product-catalogue-service-1.0.jar ~/workspace/Product_Catalog_Local_Pipeline/"
                            
                            sh "docker build -f ~/workspace/Product_Catalog_Local_Pipeline/src/main/
                            docker/Dockerfile -t retailstore/product-catalogue-service ."
                    }
                stage 'Run Integration Tests'
   	                node('master') {  
        		            def mvnHome = tool 'Maven_3.3.9'
       		                sh "${mvnHome}/bin/mvn test"
    	            }
                stage 'Generate Reports'
   	                node('master') {
       		            def mvnHome = tool 'Maven-3.3.9'
       		            sh "${mvnHome}/bin/mvn site"
    	            }
                stage 'Publish Code Coverage Report'
    	            node('master') {
                        publishHTML(target: [allowMissing: false, alwaysLinkToLastBuild: false, 
                        keepAll: false, reportDir: 'target/site/jacoco', reportFiles: 'index.html', 
                        reportName: 'Code Coverage Report'])
    	            }
                stage 'Publish Project Report'
   	                node('master') {
                        publishHTML(target: [allowMissing: false, alwaysLinkToLastBuild: false,
                        keepAll: false, reportDir: 'target/site', reportFiles: 'project-reports.html', 
                        reportName: 'Project Report'])
    	            }
                stage 'Publish Docker Image'    
	                node('master'){
                        sh "docker tag retailstore/product-catalogue-service localhost:5043/
                        retailstore/product-catalogue-service"

                        sh "docker push localhost:5043/retailstore/product-catalogue-service"
	                }
                stage 'Run Docker Image'
	                node('master'){
                        sh "if [ \$(docker ps -aqf 'name=product-catalogue-deployment') ] ; 
                        then docker rm -f  \$(docker ps -aqf 'name=product-catalogue-deployment'); 
                        else echo \" No container found\" ; fi"

                        sh "docker run -d --name product-catalogue-deployment -p 8870:8870
                        localhost:5043/retailstore/product-catalogue-service"
	                }

3

4.	Build Pipeline View

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5.	In the above stage view, we are publishing two reports – “Code Coverage Report” and 
“Project Report” in 2 different stages. 

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6.	Click the “Code Coverage Report” to see the results related to this

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7.	Click the “Project Report” to see the results related to this

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8.	On click of “FindBugs”

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9.	On click of “Checkstyle”

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10.	On click of “surefire Report”

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Pipeline is preferable over Graph view

•	In a single pipeline job, we can specify all stages of our workflow where as in Graph view each stage 
of the flow will be one "Freestyle job"
•	In Pipeline view , that master will be dynamically choose the slave node to run a particular stage 
depending on the high availability where as in Graph view we have the specify statically the slave node 
which is fixed

IBM BLUEMIX

Manual Deployment

    •	Download and install the CloudFoundary  CLi from the below URL
                https://github.com/cloudfoundry/cli 
    •	Install the ibm-containers cf CLI plugin using the below command
                cf install-plugin https://static-ice.ng.bluemix.net/ibm-containers-linux_x86 -f
    •	Login to IBM Bluemix using the login command as specified below
                cf login -a https://api.ng.bluemix.net -u [email protected] -p prokarm@2013 
                -o prokarmapoc -s poc
    •	Set the namespace for the ibm containers (This is only one time set up)
                cf ic namespace set poc_ic
    •	Login to IBM containers 
                cf ic login
    •	Tag the built docker image to the IBM Container registry
                docker tag retailstore/produt-catalogue-service registry.ng.bluemix.net/poc_ic/
                product-catalogue-service:latest
    •	Push the image to IBM Container Registry
                docker push registry.ng.bluemix.net/poc_ic/product-catalogue-service
    •	Run the container pushed to IBM registry as below
                cf ic run -p 169.44.117.16:8870:8870 --name product-catalogue-service
                registry.ng.bluemix.net/poc_ic/product-catalogue-service:latest

Auto Deployment to Bluemix from Jenkins

Create a pipeline project in Jenkins and add the below pipeline script. This will perform the below steps
•	Create jar for the sample spring boot project
•	Archive the generated jar
•	Build a docker image using the archived jar and the docker file
•	Push the generated docker image to IBM Container registryand run an instance in the bluemix from registry
            stage 'Create artifact'
                node {
                    git url: 'https://github.com/kranthiB/product-catalogue-service.git'
                    def mvnHome = tool 'Maven-3.3.9'
                    sh "${mvnHome}/bin/mvn clean install -DskipTests"
                }
            stage 'Archive artifact'
                node {
                    archive '**/*.jar,**/Dockerfile'
                }
            stage 'Build Docker Image'
                node {
                    sh "pwd"
                    sh "cp ~/workspace/Product_Catalog_BlueMix_Pipeline/target/
                    product-catalogue-service-1.0.jar ~/workspace/Product_Catalog_BlueMix_Pipeline/"
                    
                    sh "docker build -f ~/workspace/Product_Catalog_BlueMix_Pipeline/src/main/
                    docker/Dockerfile -t retailstore/product-catalogue-service ."
            }
            stage 'Deploy To IBM BLUEMIX'
                node {
                    sh "/cf login -a https://api.ng.bluemix.net -u [email protected] -p prokarm@2013 
                    -o prokarmapoc -s poc"
                    sh "/cf ic login"
                    sh "docker tag retailstore/product-catalogue-service
                    registry.ng.bluemix.net/poc_ic/product-catalogue-service:latest"
                    
                    sh "docker push registry.ng.bluemix.net/poc_ic/product-catalogue-service"
                    
                    sh "/cf ic run -p 169.44.8.154:8870:8870 --name product-catalogue-service
                    registry.ng.bluemix.net/poc_ic/product-catalogue-service:latest"
                }

Auto Deploy from IBM Dev-Ops Service

•	Login to IBM Dev-Ops Service using Bluemix credentials – https://hub.jazz.net

1

•	Click the “Create Project” in order to map the existing git url.

2

•	Select the github repository to link

3

•	Select the bluemix space and click the create button

4

•	Once project creation done, the same can be visualize in the dashboard

5

•	On selection of the project , will provided with options to edit the code or Build & Deploy the code

6

•	Create a pipeline with two stages – Build and Run as below

7

•	The configuration under Build stage will be like 

8

•	The configuration under run will be like

9

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