In this example, the pipeline runs in the CICD Project. We will build and deploy an application project named Dev, and we will push the image created into a project named stage.

Here are the commands I used from the OpenShift CLI:

Create the following projects for CI/CD components, Dev and Stage environments:

Create Projects

oc new-project cicd --display-name="CI/CD"
oc new-project dev --display-name="Tasks - Dev"
oc new-project stage --display-name="Tasks - Stage"

Grant Jenkins Access to Projects

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

Grant Image Pull access to stage project from dev, so that stage project can pull an image from the dev project.

oc policy add-role-to-group system:image-puller system:serviceaccounts:stage -n dev

start working with cicd project,

oc project cicd

#create New Jenkins Pipeline BuildConfiguration from webconsole
Add to project > import yaml/json > copy the content from pipeline.yaml > create.

once it completed Edit "Jenkins Pipeline Configuration" and replace the content with Jenkinsconfig file

change to dev project,

oc project dev

create a new Build Configuration and Deployment Configuration in dev project

create New php application from webconsole

php template > advanced option

Name: myapp

Git Repository URL:https://github.com/venatrix/bg-demo.git

uncheck following options:-

In Build Configuration:-

Automatically build a new image when the builder image changes
Launch the first build when the build configuration is created

and Deployment Configuration:-

New image is available
Deployment configuration changes

create

change to stage project

To create a deployment configuration in the stage project that points to the image from development project, create a service and route:

From cli oc project stage

To check the <<RegistryServiceIP>> :-

project dev > builds > images - docker repo

oc create deploymentconfig myapp --image=<<RegistryServiceIP>>:5000/dev/myapp:promote

edit dc myapp on project stage and make the following changes

from
 triggers:
    - type: ConfigChange
to 
  triggers:

and

from 
    imagePullPolicy: IfNotPresent
to 
  imagePullPolicy: Always

Create service and route

oc expose dc myapp --port=8080
oc expose svc myapp

cancel the deployment runs in project stage

once all the above setup completed, start pipeline from project cicd builds > pipelines - start pipeline