My Sample NodeJS application

Description

TODO

Setup

Dev environment

oc new-app nodejs~https://github.com/nmasse-itix/OpenShift-Demo-NodeJS.git --strategy=source

Full CICD Deployment

Prepare OpenShift

Create the four environments :

oc new-project demo-dev
oc new-project demo-build
oc new-project demo-test
oc new-project demo-prod

Create the build config in the build environment :

oc new-build -n demo-build nodejs~https://github.com/nmasse-itix/OpenShift-Demo-NodeJS.git --strategy=source --name=openshift-demo-nodejs

You can test the build config with :

oc start-build -n demo-build openshift-demo-nodejs --env=NPM_PACKAGE_TO_INSTALL=openshift-demo-nodejs-nmasse@0.1.0

Deploy a Jenkins in the build project :

oc new-app -n demo-build --template=jenkins-persistent --name=jenkins

Give admin role to the jenkins service account on subsequent environments :

oc adm policy add-role-to-user admin system:serviceaccount:demo-build:jenkins -n demo-test
oc adm policy add-role-to-user admin system:serviceaccount:demo-build:jenkins -n demo-prod

Give rights on other environments to pull images from build environment :

oc adm policy add-role-to-group system:image-puller system:serviceaccounts:demo-test -n demo-build
oc adm policy add-role-to-group system:image-puller system:serviceaccounts:demo-prod -n demo-build

Tag the test image :

oc tag demo-build/openshift-demo-nodejs:latest openshift-demo-nodejs:ready-for-testing -n demo-test

Create the test application :

oc new-app demo-build/openshift-demo-nodejs:ready-for-testing --name openshift-demo-nodejs -n demo-test
oc expose service openshift-demo-nodejs --name=openshift-demo-nodejs --hostname=demo.test.app.openshift.test -n demo-test

Tag the prod image :

oc tag demo-test/openshift-demo-nodejs:ready-for-testing openshift-demo-nodejs:ready-for-prod -n demo-prod

Create the prod application (blue) :

oc new-app demo-build/openshift-demo-nodejs:ready-for-prod --name openshift-demo-nodejs-blue -n demo-prod -l color=blue

Create the prod application (green) :

oc new-app demo-build/openshift-demo-nodejs:ready-for-prod --name openshift-demo-nodejs-green -n demo-prod -l color=green

Create a service on selector "color" :

oc create -n demo-prod -f - <<EOF
apiVersion: v1
kind: Service
metadata:
  labels:
    app: openshift-demo-nodejs
  name: openshift-demo-nodejs
spec:
  ports:
  - name: 8080-tcp
    port: 8080
    protocol: TCP
    targetPort: 8080
  selector:
    color: blue
  sessionAffinity: None
  type: ClusterIP
EOF

And expose this service as a route :

oc expose service openshift-demo-nodejs --name=openshift-demo-nodejs --hostname=demo.prod.app.openshift.test -n demo-prod

You can verify the target of the route with :

oc get service openshift-demo-nodejs -n demo-prod -o template --template='{{ .spec.selector.color }}'

You can change the target of the route with :

oc patch -n demo-prod service/openshift-demo-nodejs --patch '{"spec":{"selector":{"color":"green"}}}'

Disable the triggers :

oc set triggers dc/openshift-demo-nodejs --from-image=demo-build/openshift-demo-nodejs:ready-for-testing --manual=true -c openshift-demo-nodejs -n demo-test
oc set triggers dc/openshift-demo-nodejs-blue --from-image=demo-build/openshift-demo-nodejs:ready-for-prod --manual=true -c openshift-demo-nodejs-blue -n demo-prod
oc set triggers dc/openshift-demo-nodejs-green --from-image=demo-build/openshift-demo-nodejs:ready-for-prod --manual=true -c openshift-demo-nodejs-green -n demo-prod

Create the Jenkins Pipeline

Create a Jenkins Credentials with the following parameters :

• Scope: global
• Kind: Username with password
• Username:
• Password:
• ID: npm-secret

Create a Jenkins Pipeline that accepts the following parameters :

Parameter Name	Parameter Type	Default Value	Description
NPM_CREDENTIALS_ID	String	npm-secret	The Jenkins Credentials ID that holds login and password to login on NPM Registry
NPM_EMAIL	String		The email address associated with the NPM Account pointed by NPM_CREDENTIALS_ID
NPM_REGISTRY	String	https://registry.npmjs.org	Private NPM registry to log in to (Default if not provided: https://registry.npmjs.org)
OPENSHIFT_IMAGE_STREAM	String	openshift-demo-nodejs	The ImageStream name to use to tag the built images
OPENSHIFT_BUILD_CONFIG	String	openshift-demo-nodejs	The BuildConfig name to use
OPENSHIFT_SERVICE	String	openshift-demo-nodejs	The Service object to update (either green or blue)
OPENSHIFT_DEPLOYMENT_CONFIG	String	openshift-demo-nodejs	The DeploymentConfig name to use
OPENSHIFT_BUILD_PROJECT	String	demo-build	The OpenShift project in which builds are run
OPENSHIFT_TEST_ENVIRONMENT	String	demo-test	The OpenShift project in which we will deploy the test version
OPENSHIFT_PROD_ENVIRONMENT	String	demo-prod	The OpenShift project in which we will deploy the prod version
OPENSHIFT_TEST_URL	String	http://demo.test.app.openshift.test	The App URL in the test environment (to run the integration tests)

Pick the pipeline from GIT using the option "Pipeline script from SCM".