testFlask-Oauth-Proxy

Add authentication to an application using Openshift’s Internal Oauth Server via an Oauth Proxy.
Application used is:

TestFlask Application: it’s a flask application that shows how to run a flask applications in Openshift.

Find More Information about Oauth Proxy and examples below

• Github oauth-Proxy
• Using OpenShift OAuth Proxy to secure your Applications on OpenShift

Steps to Run

• Source Environment Variables

   eval "$(curl https://raw.githubusercontent.com/MoOyeg/testFlask/master/sample_env)"
  

• Optional: Create OAuth-Proxy Image

  • You can create the oauth-proxy image yourself

     export OAUTH_DOCKERFILE=$(curl https://raw.githubusercontent.com/MoOyeg/testFlask-Oauth-Proxy/main/Dockerfile)
    

     oc new-build --strategy=docker -D="$OAUTH_DOCKERFILE" --name=oauth-proxy -n ${NAMESPACE_DEV}
    

• Create the Unsecured Version of the Application for this demo.

  • Start by following the steps to create our TestFlask Application

  • After creating the application set an environment variable to let our application know we are using oauth authentication.

     oc set env deploy/${APP_NAME} AUTH_INTEGRATION=true AUTH_TYPE=openshift_oauth_proxy -n $NAMESPACE_DEV
    

• We are using the Openshift Service CA to provide TLS Certificates for our service, if you have your own certs you can provide them. To understand more about the Openshift Service CA

  • Annotate the Service to use the Openshift Serving CA provided certs and secrets

      oc annotate service ${APP_NAME} service.beta.openshift.io/serving-cert-secret-name=${APP_NAME}-secret-tls -n ${NAMESPACE_DEV}
    

• For the OAuth Proxy to work we need to use our Service Account as an Oauth Client and provide a redirect uri when the internal oauth tries to callback. For the Redirect URI we will be using our Application Route. To understand more see Service Account as Oauth Client

• Annotate the ServiceAccount with an OauthRedirect Reference pointing to our Route.

   oc -n ${NAMESPACE_DEV} annotate serviceaccount default serviceaccounts.openshift.io/oauth-redirectreference.first='{"kind":"OAuthRedirectReference","apiVersion":"v1","reference":{"kind":"Route","name":"testflask"}}'
  

• Create a Cookie Session Secret to use on the browser

  oc -n ${NAMESPACE_DEV} create secret generic ${NAMESPACE_DEV}-proxy --from-literal=session_secret=$(head /dev/urandom | tr -dc A-Za-z0-9 | head -c43)
  

• Patch the Application Deployment with the oauth-proxy sidecar.If you Create the image yourself remember to update the patch.

   oc patch deploy/${APP_NAME} --patch "$(curl https://raw.githubusercontent.com/MoOyeg/testFlask-Oauth-Proxy/main/patch-deploy.yaml)" -n ${NAMESPACE_DEV}
  

• Patch the Service with the new Oauth Proxy Port

   oc patch svc/${APP_NAME} --patch "$(curl https://raw.githubusercontent.com/MoOyeg/testFlask-Oauth-Proxy/main/patch-svc.yaml)" -n ${NAMESPACE_DEV}
  

• Mount the Service CA Secret on the Oauth Proxy Container

   oc set volume deploy/${APP_NAME} --add --containers=oauth-proxy -t=secret --secret-name=${APP_NAME}-secret-tls --mount-path=/etc/tls/private -n ${NAMESPACE_DEV}
  

• Mount the Cookie Secret on the Oauth Proxy Container

   oc set volume deploy/${APP_NAME} --add --containers=oauth-proxy -t=secret --secret-name=${NAMESPACE_DEV}-proxy --mount-path=/etc/proxy/secrets -n ${NAMESPACE_DEV}
  

• Patch the Route to enable TLS Passthrough and to route to the Oauth Pod instead of the Application

   oc patch route/${APP_NAME} --patch "$(curl https://raw.githubusercontent.com/MoOyeg/testFlask-Oauth-Proxy/main/patch-route.yaml)" -n ${NAMESPACE_DEV}
  

• If working as expected opening the route should redirect to the interal Oauth Server.Please note Route will be https if TLS was enabled above.
  • You can get the route from:

     oc get routes -n ${NAMESPACE_DEV} ${APP_NAME} -o jsonpath='{.spec.host}'