Oracle Kubernetes (OKE): Deploying a Custom Node.js Web Application Integrated with Identity Cloud Service for Unique Single Sign On (SSO) User Experience

In this post we are deploying a custom Node.js web application in Oracle Kubernetes Engine (OKE).

What we want to show is how to configure the custom web application in order to have a unique Single Sing On experience.

First part

Follow this tutorial here explaining how to enable SSO to the web app running locally

Second part

Now we are making small changes to deploy on kubernetes

Create a Dockerfile in the nodejs folder of the cloned project with the following:

FROM oraclelinux:7-slim
WORKDIR /app
ADD . /app
RUN curl --silent --location https://rpm.nodesource.com/setup_11.x | bash -
RUN yum -y install nodejs npm --skip-broken
EXPOSE 3000
CMD ["npm","start"]

Create K8s deployment file as follows:

apiVersion: v1
kind: Service
metadata:
name: idcsnodeapp
spec:
type: LoadBalancer
selector:
app: idcsnodeapp
ports:
- name: client
protocol: TCP
port: 3000

Deploy to k8s:

kubectl apply -f service.yaml

Grab the url of the new external load-balancer service created in k8s and modify the file auth.js with the appropriate values in your cloud environment

var ids = {
oracle: {
"ClientId": "client id of the IdCS app",
"ClientSecret": "client secret of the IdCS app",
"ClientTenant": "tenant id (idcs-xxxxxxxxxxxx)",
"IDCSHost": "https://tenantid.identity.oraclecloud.com",
"AudienceServiceUrl" : "https://tenantid.identity.oraclecloud.com",
"TokenIssuer": "https://identity.oraclecloud.com/",
"scope": "urn:opc:idm:t.user.me openid",
"logoutSufix": "/oauth2/v1/userlogout",
"redirectURL": "http://k8sloadbalancerip:3000/callback",
"LogLevel":"warn",
"ConsoleLog":"True"
}
};

Build the container and push to a repo you have write access to, such as:

docker build -t javiermugueta/idcsnodeapp .
docker push javiermugueta/idcsnodeapp

Modify the IdCS application with the public IP of the k8s load-balancer service

Create k8s deployment file as follows:

apiVersion: apps/v1
kind: Deployment
metadata:
name: idcsnodeapp
labels:
app: idcsnodeapp
spec:
replicas: 1
selector:
matchLabels:
app: idcsnodeapp
strategy:
type: Recreate
template:
metadata:
labels:
app: idcsnodeapp
spec:
containers:
- image: javiermugueta/idcsnodeapp
name: idcsnodeapp
ports:
- containerPort: 3000
name: idcsnodeapp

Deploy to k8s

kubectl apply -f  deployment.yaml

Test the app and verify SSO is working:

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Hope it helps! 🙂

Marcación Proa