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IBM Application Gateway Kubernetes Example

The IBM Application Gateway can be deployed in Kubernetes as a standard Deployment resource.

Kubernetes Deployment Model

This deployment of IBM Application Gateway is suitable when:

  • The application to protect is an application that is running outside of the Kubernetes infrastructure
  • The IBM Application Gateway configuration is rarely changed and does not need to be split across multiple sources
  • The Kubernetes administrator needs to handle the container maintenance
  • There are a limited number of IBM Application Gateway instances required

Example

The following steps will:

  • Setup the IBM Application Gateway application
  • Create an instance of the IBM Application Gateway
  • Access the protected application via the IBM Application Gateway
  • The page will show the identity and other headers that have been added to the request by the IBM Application Gateway

Note: This example does not include authentication. This example illustrates the deployment process for using IBM Application Gateway as a proxy to a protected application. For details on adding authentication, refer to Configuring as an OIDC Relying Party for IBM Security Verify or Configuring as an OIDC Relying Party for IBM Security Verify Access.

Note: This example uses Minikube with a docker driver

  1. Start Minikube.
minikube start --driver docker
  1. Set context.
kubectl config use-context minikube
eval $(minikube docker-env)
  1. Paste the following into a file named test_config.yaml.
apiVersion: v1
kind: ConfigMap
metadata:
  name: test-config
data:
  config.yaml: |
    version: "20.09"
    resource_servers:
      - path: "/static"
        connection_type: "ssl"
        servers:
          - host: resource-server.au-syd.mybluemix.net
            port: 443
        identity_headers:
          attributes:
            - attribute: groupIds
              header: iv_groups
            - attribute: AZN_CRED_AUTHZN_ID
              header: iv_user
          jwt:
            certificate: "B64: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"
            hdr_name: jwt
            claims:
              - text: www.ibm.com
                name: iss
              - attr: AZN_CRED_PRINCIPAL_NAME
                name: sub
              - attr: AZN_*
  1. Create the IBM Application Gateway configuration configmap.
kubectl apply -f test_config.yaml
  1. Paste the following into a file named iag_service_account.yaml.
apiVersion: v1
kind: ServiceAccount
metadata:
  name: ibm-application-gateway
  1. Create the IBM Application Gateway service account.
kubectl apply -f iag_service_account.yaml
  1. Paste the following into a file named iag_instance.yaml.
apiVersion: apps/v1
kind: Deployment
metadata:
  name: iag-instance
  labels:
    app: iag-instance
spec:
  selector:
    matchLabels:
      app: iag-instance
  replicas: 1
  template: 
    metadata:
      labels:
        app: iag-instance
    spec:
      serviceAccountName: ibm-application-gateway
      volumes:
        - name: test-config
          configMap:
            name: test-config
      containers:
        - name: iag-instance
          image: ibmcom/ibm-application-gateway:20.09.0
          volumeMounts:
            - name: test-config
              mountPath: /var/iag/config
          readinessProbe:
            exec:
              command:
              - /sbin/health_check.sh
            initialDelaySeconds: 5
            periodSeconds: 10
          livenessProbe:
            exec:
              command:
              - /sbin/health_check.sh
            initialDelaySeconds: 120
            periodSeconds: 20
  1. Create the IBM Application Gateway instance.
kubectl apply -f iag_instance.yaml
  1. Ensure that the IBM Application Gateway pod has started correctly.
kubectl get all

NAME                                                    READY   STATUS    RESTARTS   AGE
pod/iag-instance-76759f9764-nh4jd                       1/1     Running   0          3s

NAME                                               TYPE           CLUSTER-IP       EXTERNAL-IP   PORT(S)             AGE
service/kubernetes                                 ClusterIP      10.96.0.1        <none>        443/TCP             11m

NAME                                               READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/iag-instance                       1/1     1            1           3s

NAME                                                          DESIRED   CURRENT   READY   AGE
replicaset.apps/iag-instance-76759f9764                       1         1         1       3s
  1. Expose the IBM Application Gateway port.
kubectl port-forward deployment.apps/iag-instance 30112:8443
  1. Use a browser to access the demo URL.
https://127.0.0.1:30112/static
  1. The demo page is shown.

This page includes the following pieces that have been added by the IBM Application Gateway:

  • A JWT header has been added
  • The IV-USER, IV-GROUPS and IV-SERVER-NAME headers have been added
  • The JWT has been extracted

Demo Application

  1. Exit the port forward process by pressing ctrl-c in the shell.

  2. Cleanup.

kubectl delete -f iag_instance.yaml
kubectl delete -f iag_service_account.yaml
kubectl delete -f test_config.yaml
  1. Stop Minikube.
minikube stop