CI/CD Infrastructure Setup

Internal

• OpenShift CI/CD Operations

Overview

This is the procedure to install a CI/CD pipeline based on Jenkins. The CI/CD pipeline will execute in a separate project from the projects that need CI/CD services, named "CICD".

The deployment is based on https://github.com/OpenShiftDemos/openshift-cd-demo/blob/ocp-3.5/cicd-template.yaml (or newer).

A special special service account ("system:serviceaccount:CICD:jenkins") will be created for Jenkins.

Additional components (Gogs, Sonar, Nexus) will also be deployed.

Create Required Image Streams

Create an Image Stream

Create Projects

Create the following projects:

1. A project for the CI/CD components, named "CICD":

oc new-project CICD --display-name="CI/CD pipeline with Jenkins"

2. A project to host development-stage containers and processes, named "dev":

oc new-project dev --display-name="Test Development Project"

3. A project to host publicly-accessible application produced by the CI/CD pipeline, named "stage":

oc new-project stage --display-name="Test Stage Project"

Grant Required Permissions

Jenkins components need to access the OpenShift API, so the service account that will run the Jenkins pod ("system:serviceaccount:CICD:jenkins") must be given appropriate permissions for the projects it must service:

Do we really need "admin" to "jenkins"?

oc policy add-role-to-user admin system:serviceaccount:CICD:jenkins

oc policy add-role-to-user edit system:serviceaccount:CICD:jenkins -n dev
oc policy add-role-to-user edit system:serviceaccount:CICD:jenkins -n stage

More details about Jenkins security considerations:

Jenkins Security Considerations

Provision a Persistent Volume

The template requires a persistent volume, which must be provisioned before the installation.

Persistent Volume Operations

Create Jenkins Components

oc project CICD

oc process -f ./cicd-template.yaml --param DEV_PROJECT=dev --param STAGE_PROJECT=stage \
| oc create -f - 

A template example for OpenShift 3.5 is available at https://github.com/OpenShiftDemos/openshift-cd-demo/blob/ocp-3.5/cicd-template.yaml. A version is also available here:

OpenShift CICD Template Example

Post-Install Adjustments

Adjust Readiness Probe Timeout

 oc set probe dc jenkins --readiness --initial-delay-seconds=500

Adjust Memory

oc project CICD
oc set resources dc/jenkins --limits=memory=1Gi

Verification

• Jenkins should start and be available at https://jenkins-cicd.apps.openshift.novaordis.io/
• Gogs should start and be available at https://gogs-cicd.apps.openshift.novaordis.io/
• Nexus should start and be available at https://nexus-cicd.apps.openshift.novaordis.io/