Microsoft

• Azure AD SAML Enterprise App Auth using Dex
• Azure AD App Registration Auth using OIDC
• Azure AD App Registration Auth using Dex

Azure AD SAML Enterprise App Auth using Dex

Configure a new Azure AD Enterprise App

1. From the Azure Active Directory > Enterprise applications menu, choose + New application
2. Select Non-gallery application
3. Enter a Name for the application (e.g. Argo CD), then choose Add
4. Once the application is created, open it from the Enterprise applications menu.
5. From the Users and groups menu of the app, add any users or groups requiring access to the service.

1. From the Single sign-on menu, edit the Basic SAML Configuration section as follows (replacing my-argo-cd-url with your Argo URL):
2. Identifier (Entity ID): https://<my-argo-cd-url>/api/dex/callback
3. Reply URL (Assertion Consumer Service URL): https://<my-argo-cd-url>/api/dex/callback
4. Sign on URL: https://<my-argo-cd-url>/auth/login
5. Relay State: <empty>
6. Logout Url: <empty>

1. From the Single sign-on menu, edit the User Attributes & Claims section to create the following claims:
2. + Add new claim | Name: email | Source: Attribute | Source attribute: user.mail
3. + Add group claim | Which groups: All groups | Source attribute: Group ID | Customize: True | Name: Group | Namespace: <empty> | Emit groups as role claims: False
4. Note: The Unique User Identifier required claim can be left as the default user.userprincipalname

1. From the Single sign-on menu, download the SAML Signing Certificate (Base64)
2. Base64 encode the contents of the downloaded certificate file, for example:
3. $ cat ArgoCD.cer | base64
4. Keep a copy of the encoded output to be used in the next section.
5. From the Single sign-on menu, copy the Login URL parameter, to be used in the next section.

Configure Argo to use the new Azure AD Enterprise App

1. Edit argocd-cm and add the following dex.config to the data section, replacing the caData, my-argo-cd-url and my-login-url your values from the Azure AD App:

data:
  url: https://my-argo-cd-url
  dex.config: |
    logger:
      level: debug
      format: json
    connectors:
    - type: saml
      id: saml
      name: saml
      config:
        entityIssuer: https://my-argo-cd-url/api/dex/callback
        ssoURL: https://my-login-url (e.g. https://login.microsoftonline.com/xxxxx/a/saml2)
        caData: |
          MY-BASE64-ENCODED-CERTIFICATE-DATA
        redirectURI: https://my-argo-cd-url/api/dex/callback
        usernameAttr: email
        emailAttr: email
        groupsAttr: Group

1. Edit argocd-rbac-cm to configure permissions, similar to example below.

2. Use Azure AD Group IDs for assigning roles.

3. See RBAC Configurations for more detailed scenarios.

# example policy
policy.default: role:readonly
  policy.csv: |
    p, role:org-admin, applications, *, */*, allow
    p, role:org-admin, clusters, get, *, allow
    p, role:org-admin, repositories, get, *, allow
    p, role:org-admin, repositories, create, *, allow
    p, role:org-admin, repositories, update, *, allow
    p, role:org-admin, repositories, delete, *, allow
    g, "84ce98d1-e359-4f3b-85af-985b458de3c6", role:org-admin # (azure group assigned to role)

Azure AD App Registration Auth using OIDC

1. Register a new Azure AD Application

   Quickstart: Register an application

   App Registrations Inputs
       Redirect URI: https://argocd.example.com/auth/callback
   Outputs
       Application (client) ID: aaaaaaaa-1111-bbbb-2222-cccccccccccc
       Directory (tenant) ID: 33333333-dddd-4444-eeee-555555555555
       Secret: some_secret
   

2. Setup permissions for Azure AD Application

   On "API permissions" page find User.Read permission (under Microsoft Graph) and grant it to the created application:

   

   Also, on "Token Configuration" page add groups claim for the groups assigned to the application:

   

3. Edit argocd-cm and configure the data.oidc.config section:

   ConfigMap -> argocd-cm
   
   data:
       url: https://argocd.example.com/
       oidc.config: |
           name: Azure
           issuer: https://login.microsoftonline.com/{directory_tenant_id}/v2.0
           clientID: {azure_ad_application_client_id}
           clientSecret: $oidc.azure.clientSecret
           requestedIDTokenClaims:
               groups:
                   essential: true
           requestedScopes:
               - openid
               - profile
               - email
   

4. Edit argocd-secret and configure the data.oidc.azure.clientSecret section:

   Secret -> argocd-secret
   
   data:
       oidc.azure.clientSecret: {client_secret | base64_encoded}
   

5. Edit argocd-rbac-cm to configure permissions. Use group ID from Azure for assigning roles

   RBAC Configurations

   ConfigMap -> argocd-rbac-cm
   
   policy.default: role:readonly
   policy.csv: |
       p, role:org-admin, applications, *, */*, allow
       p, role:org-admin, clusters, get, *, allow
       p, role:org-admin, repositories, get, *, allow
       p, role:org-admin, repositories, create, *, allow
       p, role:org-admin, repositories, update, *, allow
       p, role:org-admin, repositories, delete, *, allow
       g, "84ce98d1-e359-4f3b-85af-985b458de3c6", role:org-admin
   

6. Mapping role from jwt token to argo

   If you want to map the roles from the jwt token to match the default roles (readonly and admin) then you must change the scope variable in the rbac-configmap.

   scopes: '[roles, email]'
   

Azure AD App Registration Auth using Dex

Configure a new AD App Registration, as above.

Then, add the dex.config to argocd-cm:

ConfigMap -> argocd-cm

data:
    dex.config: |
      connectors:
      - type: microsoft
        id: microsoft
        name: Your Company GmbH
        config:
          clientID: $MICROSOFT_APPLICATION_ID
          clientSecret: $MICROSOFT_CLIENT_SECRET
          redirectURI: http://localhost:8080/api/dex/callback
          tenant: ffffffff-ffff-ffff-ffff-ffffffffffff
          groups:
            - DevOps