CI/CD Defined
In modern software projects many teams utilize the concept of Continuous Integration (CI) and Continuous Delivery (CD). By setting up a tool chain that continuously builds, tests, and stages software releases, a team can ensure that their product can be reliably released at any time. OpenShift can be an enabler in the creation and management of this tool chain.
In this lab we walk through creating a simple example of a CI/CD [pipeline] utilizing Jenkins, all running on top of OpenShift! The Jenkins job will trigger OpenShift to build and deploy a test version of the application, validate that the deployment works, and then tag the test version into production.
Create a new project
Create a new project named “cicd-YOUR# ”.
Create the project cicd-YOUR#
$ oc new-project cicd-YOUR#
Switch modes to
click "Create Project".
Fill in the Name and Display Name of the project as "cicd-YOUR# " and click "Create"
Instantiate a Jenkins server in your project
$ oc new-app jenkins-ephemeral
$ oc logs -f dc/jenkins
--> Scaling jenkins-1 to 1
--> SuccessWait for logs to return "Success". Note: This may take awhile.
In "Developer" mode, click "+Add"
Select the "From Catalog" button, Select "Template"
Filter on "Jenkins (Ephemeral)". Then select "Jenkins (Ephemeral)".
Click
Select the Project cicd-YOUR# from "Namespace"
Scroll down to the bottom, and click
Go to "Topology", select the deployment configuration for jenkins, under details ... wait to pod scales to 1.
Create a sample application configuration
$ oc create -f https://raw.githubusercontent.com/openshift/origin/master/examples/jenkins/pipeline/nodejs-sample-pipeline.yaml
buildconfig.build.openshift.io/nodejs-sample-pipeline created
$Confirm you can access Jenkins
Get the route to the Jenkins server. Your HOST/PORT values will differ from the example below.
$ oc get route
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
frontend frontend-cicd.192.168.42.27.xip.io frontend <all> edge None
jenkins jenkins-cicd.192.168.42.27.xip.io jenkins <all> edge/Redirect NoneUse Jenkins HOST/PORT to access through web browser
In "Developer" mode, under "Topology", click the arrow, in the upper right corner of the "jenkins" icon
Select "Login with OpenShift" from Jenkins login page
The OpenShift login page is displayed in a new browser tab.
Login with your OpenShift user name and password
Once logged in, click the [Allow selected permissions] button and you should see the Jenkins dashboard.
Start the pipeline
Using the OpenShift Web Console, in "Administrator" mode, choose Builds -> Build Configs, and then click on "nodejs-sample-pipeline"
From the "Actions" menu, choose "Start Build"
When the pipeline starts, OpenShift uploads the pipeline to the Jenkins server for execution.
The Jenkins dashboard should indicate that a new build is executing.
Back in the OpenShift Web Console, watch the pipeline execute.
Confirm application is available
In "Developer" mode, select the "cicd-YOUR#" project, and click on "Topology"
Click on the arrow, at the upper right corner of the "nodejs-mongodb6-example" icon, to launch the web page
Service web page displayed:
Summary
In this lab you have very quickly and easily constructed a basic pipeline.
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