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ChaosCenter with OAuth2 Login Support

Prerequisites

Before deploying LitmusChaos, make sure the following items are there

  • Kubernetes 1.17 or later

  • A Persistent volume of 20GB

    note

    Recommend to have a Persistent volume(PV) of 20GB, You can start with 1GB for test purposes as well. This PV is used as persistent storage to store the chaos config and chaos-metrics in the Portal. By default, litmus install would use the default storage class to allocate the PV. Provide this value

  • kubectl

  • Deployed ChaosCenter

  • Atleast one of the following

    • Google Oauth credentials
    • GitHub Oauth credentials

Deploy Dex OIDC provider​

In order to enable OAuth2 and to be able to login via Google and GitHub, litmus uses Dex OIDC

Make sure you have your Google and GitHub Client credentials ready, if you do not have them, you can generate one yourself

Configuring Dex OIDC provider​

curl https://raw.githubusercontent.com/litmuschaos/litmus/master/chaoscenter/dex-server/dex-deployment.yaml --output dex-deployment.yaml
  1. Open the file with your favorite text-editor
  2. You will find the following config-map with some data, replace your data as the comments suggests
    issuer: http://<NODE_IP>:32000 # Replace your NODE_IP here
    storage:
      type: kubernetes
      config:
        inCluster: true
    web:
      http: 0.0.0.0:5556
    staticClients:
      - id: LitmusPortalAuthBackend
        redirectURIs:
          - '/auth/dex/callback'
          - 'http://localhost:8080/auth/dex/callback' # Included for local testing purposes
          - 'https://<REPLACE_FRONTEND_URL>/auth/dex/calllback' #TODO: Replace with you frontend URL
        name: 'LitmusPortalAuthBackend'
        secret: ZXhhbXBsZS1hcHAtc2VjcmV0
    oauth2:
      skipApprovalScreen: true
    connectors:
      - type: google
        id: google
        name: Google
        config:
          clientID: # Add your Google Client ID here
          clientSecret: # Add your Google Client Secret here
          redirectURI: http://<NODE_IP>:32000 # Replace your NODE_IP here
      - type: github
        id: github
        name: GitHub
        config:
          clientID: # Add your GitHub Client ID here
          clientSecret: # Add your GitHub Client Secret here
          redirectURI: http://<NODE_IP>:32000/callback # Replace your NODE_IP here

Note: The Dex OIDC provider runs at NODE_IP:32000 by default

After the configuration, deploy the Dex deployment using the following command:

kubectl apply -f dex-deployment.yaml

You should now see the dex-server deployed in the litmus namespace!

kubectl get pods -n litmus
Expected Output
NAME                                      READY   STATUS              RESTARTS   AGE
litmusportal-dex-server-7f7658b57-lbbxc   1/1     Running             0          107s
litmusportal-frontend-74d456746f-56v9x    1/1     Running             0          5m57s
litmusportal-server-9c4d85f57-5r6km       2/2     Running             0          5m57s
mongo-0                                   1/1     Running             0          5m57s

Configuring chaos-litmus-auth-server to enable Dex features​

To set up Dex, we would require to modify our litmusportal-server a bit in order to communicate with Dex. This will be achieved by adding some environment variables

  • OIDC_ISSUER: The place where the Dex OIDC is hosted, i.e NODE_IP:32000 or https://dex.yourdomain.com
  • DEX_ENABLED: This variable enables dex features in the litmusportal-server
  • DEX_OAUTH_CALLBACK_URL: This is the url that will be called back after user completes thier OAuth, this will be the litmusportal-frontend service
  • DEX_OAUTH_CLIENT_ID: This parameter is defined in the dex-deployment.yaml file the defaults being LitmusPortalAuthBackend
  • DEX_OAUTH_CLIENT_SECRET: This parameter is defined in the dex-deployment.yaml file the defaults being ZXhhbXBsZS1hcHAtc2VjcmV0

Set your variables using

kubectl set env deployment/chaos-litmus-auth-server -n litmus --containers="auth-server" DEX_ENABLED=true OIDC_ISSUER=<REPLACE_NODE_IP>:32000 DEX_OAUTH_CALLBACK_URL=https://<REPLACE_FRONTEND_URL>/auth/dex/callback DEX_OAUTH_CLIENT_ID=LitmusPortalAuthBackend DEX_OAUTH_CLIENT_SECRET=ZXhhbXBsZS1hcHAtc2VjcmV0

Your chaos-litmus-auth-server pod(s) will be restarted and Dex features will be enabled!

Verifying if OAuth2 is enabled​

Run the following command to check the env variables of the auth-server

kubectl describe deployment litmusportal-server -n litmus auth-server

Under auth-server, verify if the DEX_ENABLED variables are set

Expected Output
   auth-server:
    Image:       litmuschaos/litmusportal-auth-server:ci
    Ports:       3000/TCP, 3030/TCP
    Host Ports:  0/TCP, 0/TCP
    Environment Variables from:
      chaoscenter-admin-config  ConfigMap  Optional: false
      chaoscenter-admin-secret  Secret     Optional: false
    Environment:
      STRICT_PASSWORD_POLICY:  false
      ADMIN_USERNAME:          admin
      ADMIN_PASSWORD:          litmus
      LITMUS_SVC_ENDPOINT:     127.0.0.1
      OIDC_ISSUER:             [REDACTED]
      DEX_ENABLED:             true
      DEX_OAUTH_CALLBACK_URL:  [REDACTED]
    Mounts:                    <none>

Go to http://litmusportal-frontend-service/auth/dex/login, you should be prompted with Google or GitHub login

litmus-oauth-image

Resources​

Learn more​