I am hosting an application on GKE and would like to be able to let users from my organization access this application from the web. I would like them to be able to log-in using their Google Account IAM credentials.
Is there a way to configure a service exposing the clusters web endpoint such that to access this service the user simply needs to login with their google account?
For example, when testing a service I can easily do a web-preview in the cloud-shell and then access the web application in my browser.
Is there a way to configure this such that any users authorized in my organization can access the web interface of my application?
(Note, I asked the same question on DevOps but I feel like that site is not yet as active as it should be so I ask here as well)
Okay, I managed to make it work perfectly. But it took a few steps. I am including the manifest here that is required to setup the IAP using an ingress. It requires a few things which I listed in the manifest below. Hopefully this can help others since I could not find a single source that had all of this put together. Essentially all you need to do is run kubectl apply -f secure-ingress.yaml to make everything work (as long as you have all the depenedencies) and then you just need to configure your IAP as you like it.
secure-ingress.yaml
# Configure IAP security using ingress automatically
# requirements: kubernetes version at least 1.10.5-gke.3
# requirements: service must respond with 200 at / endpoint (the healthcheck)
# dependencies: need certificate secret my-secret-cert
# dependencies: need oath-client secret my-secret-oath (with my.domain.com configured)
# dependencies: need external IP address my-external-ip
# dependencies: need domain my.domain.com to point to my-external-ip IP
# dependencies: need an app (deployment/statefulset) my-app
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: my-secure-ingress
namespace: default
annotations:
kubernetes.io/ingress.class: "gce"
kubernetes.io/ingress.allow-http: "false"
kubernetes.io/ingress.global-static-ip-name: my-external-ip
spec:
tls:
- secretName: my-secret-cert
backend:
serviceName: my-service-be-web
servicePort: 1234
---
kind: Service
apiVersion: v1
metadata:
name: my-service-be-web
namespace: default
annotations:
beta.cloud.google.com/backend-config:
'{"default": "my-service-be-conf"}'
spec:
type: NodePort
selector:
app: my-app
ports:
- protocol: TCP
port: 1234
targetPort: 1234
name: my-port-web
---
apiVersion: cloud.google.com/v1beta1
kind: BackendConfig
metadata:
name: my-service-be-conf
namespace: default
spec:
iap:
enabled: true
oauthclientCredentials:
secretName: my-secret-oath