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title: Configuring OIDC with Keycloak | ||
--- | ||
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In this guide we will show you how to enable users to login to the Weave GitOps dashboard by authenticating them against a Keycloak instance. | ||
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This example uses [Keycloak](https://www.keycloak.org/) and assumes Weave GitOps has already been installed on the Kubernetes Cluster. | ||
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## Pre-requisites | ||
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- A Kubernetes cluster | ||
- Weave GitOps is [installed](../../intro-weave-gitops/#getting-started) and [TLS has been enabled](../../enterprise/getting-started/install-enterprise/#tls-configuration) | ||
- Access to a running Keycloak installation | ||
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## Configuring a new Keycloak Realm | ||
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The first step is to create a new realm in Keycloak for our applications. | ||
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![Creating a new Realm in Keycloak step 1](img/kc_step_01.png) | ||
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To do that, navigate to your keycloak admin console and: | ||
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1. In the top left menu, select the realm dropdown | ||
2. Click on the `Create Realm` button | ||
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![Creating a new Realm in Keycloak step 2](img/kc_step_02.png) | ||
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In the new window, fill in a name for your realm and then click on `Create`. In this guide, the realm will be named `demo`. | ||
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### Creating a new Keycloak Client | ||
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You should now have a new realm created. Now onto creating the client. | ||
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![Keycloak realm homepage](img/kc_step_03.png) | ||
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From the Keycloak admin console, make sure the new realm is selected in the top-left dropdown, and click on the `Clients` tab in the left menu. | ||
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![Keycloak realm clients list](img/kc_step_04.png) | ||
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Click on the `Create client` button at the top of the clients list. | ||
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![Keycloak create client step 1](img/kc_step_05.png) | ||
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In the `General Settings` pane: | ||
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1. Make sure that the client type is set to `OpenID Connect` | ||
1. Set the `clientID` for your client to `weave-gitops` | ||
1. Give your client a suggestive name | ||
1. Click on the `Next` button. | ||
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![Keycloak create client step 2](img/kc_step_06.png) | ||
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In the `Capability config` pane: | ||
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1. Make sure `Client authentication` is turned on | ||
1. Make sure `Standard flow` is turned on | ||
1. Make sure `Direct access grants` is turned on | ||
1. Click on the `Next` button. | ||
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![Keycloak create client step 3](img/kc_step_07.png) | ||
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Finally, in the `Login settings` pane: | ||
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1. Set the `Home URL` for your client to the URL of your Weave GitOps instance. For this demo, that's `https://WEAVE_GITOPS_URL` | ||
1. Set the `Valid redirect URIs` to the URL of your Weave GitOps instance followed by `/oauth2/callback`. For this demo, that's `https://WEAVE_GITOPS_URL/oauth2/callback` | ||
1. Click on `Save` | ||
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### Creating the Groups Mapper for the Keycloak Client | ||
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You should now have an OIDC client created in your realm. | ||
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![Keycloak new client page](img/kc_step_08.png) | ||
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From the `Clients` page, click on your newly created client. | ||
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![Keycloak client scopes](img/kc_step_09.png) | ||
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1. In the top menu, select the `Client scopes` tab | ||
1. From the list of client scopes, select the `<client-name>-dedicated` scope. For this demo, that's `weave-gitops-dedicated` | ||
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![Keycloak create new mapper step 1](img/kc_step_10.png) | ||
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In the new window, you should see that there are no mappers configured. Click on the `Configure a new mapper` button. | ||
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![Keycloak create new mapper step 2](img/kc_step_11.png) | ||
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In the dialog that pops up, scroll down until you see `User Client Role` and select it. | ||
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![Keycloak create new mapper step 3](img/kc_step_12.png) | ||
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In the new window that opens up: | ||
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1. Set the `Name` of your mapper to `groups` | ||
1. Select your client in the `Client ID` drop-down | ||
1. Set the `Token Claim Name` to groups | ||
1. Make sure the other settings match the ones in the screenshot above and click on `Save` | ||
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![Keycloak new mapper in list](img/kc_step_13.png) | ||
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You should now be able to see your new mapper in the list. | ||
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### Creating the Client Roles | ||
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Once your client and your mapper are created, it's time to create some roles. | ||
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![Keycloak create client role step 1](img/kc_step_14.png) | ||
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Navigate back to your client page and select the `Roles` tab in the top menu. It should say that there are currently no roles configured for this client. Click on `Create role` | ||
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![Keycloak create client role step 2](img/kc_step_15.png) | ||
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In the new window that is opened: | ||
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1. Fill in your role name to `wego-admin` | ||
2. Click on `Save` | ||
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![Keycloak create client role step 3](img/kc_step_16.png) | ||
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You should now be able to see your new role configured. | ||
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### Obtaining the client secret | ||
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Now that everything is configured, we need to grab the client secret from Keycloak in order to configure OIDC for Weave GitOps. | ||
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![Keycloak new mapper in list](img/kc_step_17.png) | ||
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Navigate back to your client page and select the `Credentials` tab in the top menu. Copy the `Client secret` value and save it for later. | ||
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### Creating a demo user | ||
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Since this demo does not cover setting up the LDAP or AD integration for Keycloak, we need to create a demo user to validate our config. | ||
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![Keycloak create user step 1](img/kc_step_18.png) | ||
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Navigate back to the realm homepage in your Keycloak Admin console, and: | ||
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1. Select the `Users` tab in the left menu | ||
2. Click on the `Add user` button | ||
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![Keycloak create user step 2](img/kc_step_19.png) | ||
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In the new page that opens up, fill in the details of a demo user and click on `Create`. | ||
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![Keycloak create user step 3](img/kc_step_20.png) | ||
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Once the user is created, we need to set a password. To do that: | ||
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1. Navigate to the `Credentials` tab in the top menu | ||
2. Click on the `Set password` button | ||
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![Keycloak create user step 4](img/kc_step_21.png) | ||
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In the dialog that opens up, set a password for your user, confirm it, optionally mark it as not-temporary and click on `Save`. | ||
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![Keycloak create user step 5](img/kc_step_22.png) | ||
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You should now see a password configured for your user. | ||
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![Keycloak create user step 6](img/kc_step_23.png) | ||
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Now we need to assign the `wego-admin` role we created earlier to our user. To do that: | ||
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1. Navigate to the `Role mapping` tab in the top menu | ||
2. Click on the `Assign role` button | ||
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![Keycloak create user step 7](img/kc_step_24.png) | ||
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In the dialog that opens up: | ||
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1. Select the `Filter by clients` option in the dropdown | ||
2. Type in your client name in the search bar | ||
3. Tick the checkbox next to the role | ||
4. Click on `Assign` | ||
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![Keycloak create user step 8](img/kc_step_25.png) | ||
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The role should now appear in the `Role mapping` section and our user should be fully configured. | ||
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## Configuring Weave GitOps to use our new Keycloak Client | ||
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Now that our Keycloak configuration is done, it's time to link our Weave GitOps deployment to it. | ||
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### Creating the `oidc-auth` secret | ||
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To configure Weave GitOps for OIDC authentication via Keycloak, we need to configure the `oidc-auth` secret. We need to set: | ||
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- the `issuerURL` to the URL of our keycloak instance, followed by `/realms/<realm_name>` | ||
- the `redirectURL` to the URL of our Weave GitOps instance, followed by `/oauth2/callback` | ||
- the `clientID` to the id of the client we created in the previous steps | ||
- the `clientSecret` to the secret we copied a few steps ago | ||
- the `customScopes` to `email` | ||
- the `claimGroups` to `groups` to work with our mapper, mapping from roles->groups | ||
- the `claimUsername` to `sub` | ||
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<details><summary>Expand to see secret definition </summary> | ||
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```yaml | ||
apiVersion: v1 | ||
kind: Secret | ||
metadata: | ||
name: oidc-auth | ||
stringData: | ||
issuerURL: https://auth.mydomain.com/keycloak/realms/demo | ||
redirectURL: https://gitops.mydomain.com/oauth2/callback | ||
clientID: weave-gitops | ||
clientSecret: N8jDkMdghg38jiw52VHeTH1V7WUmM1tv | ||
customScopes: email | ||
claimGroups: groups | ||
claimUsername: sub | ||
``` | ||
</details> | ||
After this secret is created, you may need to delete the Weave GitOps pods in order to restart the app and load the new config. | ||
### Setting up RBAC | ||
Once Weave GitOps is configured for OIDC, we need a way to map permissions to the groups. To do that, we need to create role bindings for our `wego-admin` group. | ||
The following example assumes that the ClusterRole `wego-admin-cluster-role` and the namespaced Role `wego-admin-role` already exist. It will grant everyone | ||
in the `wego-admin` group within Keycloak admin access. See the [recommendations on setting up RBAC](../../enterprise/getting-started/install-enterprise/#recommended-rbac-configuration) | ||
for details. | ||
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<details><summary>Expand to see group role bindings</summary> | ||
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```yaml | ||
--- | ||
apiVersion: rbac.authorization.k8s.io/v1 | ||
kind: ClusterRoleBinding | ||
metadata: | ||
name: keycloak-wego-admin | ||
subjects: | ||
- kind: Group | ||
name: wego-admin | ||
apiGroup: rbac.authorization.k8s.io | ||
roleRef: | ||
kind: ClusterRole | ||
name: wego-admin-cluster-role | ||
apiGroup: rbac.authorization.k8s.io | ||
``` | ||
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</details> | ||
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## Testing the configuration | ||
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Now that everything is set up, let's test our configuration. | ||
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![Test config step 1](img/kc_step_26.png) | ||
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Navigate to your Weave GitOps dashboard URL and click on the `Login With Keycloak` button. You should be redirected to a Keycloak Login page. | ||
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![Test config step 2](img/kc_step_27.png) | ||
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In the page that opens up, input your demo user credentials and click on `Sign In`. | ||
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![Test config step 3](img/kc_step_28.png) | ||
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You should now be redirected back to Weave GitOps and, thanks to the RBAC configuration, you should now see all of the configured applications. |
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