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142 lines
5.2 KiB
Markdown
142 lines
5.2 KiB
Markdown
# Keycloak {#module-services-keycloak}
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[Keycloak](https://www.keycloak.org/) is an
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open source identity and access management server with support for
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[OpenID Connect](https://openid.net/connect/),
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[OAUTH 2.0](https://oauth.net/2/) and
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[SAML 2.0](https://en.wikipedia.org/wiki/SAML_2.0).
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## Administration {#module-services-keycloak-admin}
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An administrative user with the username
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`admin` is automatically created in the
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`master` realm. Its initial password can be
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configured by setting [](#opt-services.keycloak.initialAdminPassword)
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and defaults to `changeme`. The password is
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not stored safely and should be changed immediately in the
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admin panel.
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Refer to the [Keycloak Server Administration Guide](
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https://www.keycloak.org/docs/latest/server_admin/index.html
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) for information on
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how to administer your Keycloak
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instance.
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## Database access {#module-services-keycloak-database}
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Keycloak can be used with either PostgreSQL, MariaDB or
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MySQL. Which one is used can be
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configured in [](#opt-services.keycloak.database.type). The selected
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database will automatically be enabled and a database and role
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created unless [](#opt-services.keycloak.database.host) is changed
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from its default of `localhost` or
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[](#opt-services.keycloak.database.createLocally) is set to `false`.
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External database access can also be configured by setting
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[](#opt-services.keycloak.database.host),
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[](#opt-services.keycloak.database.name),
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[](#opt-services.keycloak.database.username),
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[](#opt-services.keycloak.database.useSSL) and
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[](#opt-services.keycloak.database.caCert) as
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appropriate. Note that you need to manually create the database
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and allow the configured database user full access to it.
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[](#opt-services.keycloak.database.passwordFile)
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must be set to the path to a file containing the password used
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to log in to the database. If [](#opt-services.keycloak.database.host)
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and [](#opt-services.keycloak.database.createLocally)
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are kept at their defaults, the database role
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`keycloak` with that password is provisioned
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on the local database instance.
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::: {.warning}
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The path should be provided as a string, not a Nix path, since Nix
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paths are copied into the world readable Nix store.
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:::
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## Hostname {#module-services-keycloak-hostname}
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The hostname is used to build the public URL used as base for
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all frontend requests and must be configured through
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[](#opt-services.keycloak.settings.hostname).
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::: {.note}
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If you're migrating an old Wildfly based Keycloak instance
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and want to keep compatibility with your current clients,
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you'll likely want to set [](#opt-services.keycloak.settings.http-relative-path)
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to `/auth`. See the option description
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for more details.
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:::
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[](#opt-services.keycloak.settings.hostname-strict-backchannel)
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determines whether Keycloak should force all requests to go
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through the frontend URL. By default,
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Keycloak allows backend requests to
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instead use its local hostname or IP address and may also
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advertise it to clients through its OpenID Connect Discovery
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endpoint.
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For more information on hostname configuration, see the [Hostname
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section of the Keycloak Server Installation and Configuration
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Guide](https://www.keycloak.org/server/hostname).
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## Setting up TLS/SSL {#module-services-keycloak-tls}
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By default, Keycloak won't accept
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unsecured HTTP connections originating from outside its local
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network.
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HTTPS support requires a TLS/SSL certificate and a private key,
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both [PEM formatted](https://en.wikipedia.org/wiki/Privacy-Enhanced_Mail).
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Their paths should be set through
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[](#opt-services.keycloak.sslCertificate) and
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[](#opt-services.keycloak.sslCertificateKey).
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::: {.warning}
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The paths should be provided as a strings, not a Nix paths,
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since Nix paths are copied into the world readable Nix store.
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:::
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## Themes {#module-services-keycloak-themes}
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You can package custom themes and make them visible to
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Keycloak through [](#opt-services.keycloak.themes). See the
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[Themes section of the Keycloak Server Development Guide](
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https://www.keycloak.org/docs/latest/server_development/#_themes
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) and the description of the aforementioned NixOS option for
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more information.
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## Configuration file settings {#module-services-keycloak-settings}
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Keycloak server configuration parameters can be set in
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[](#opt-services.keycloak.settings). These correspond
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directly to options in
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{file}`conf/keycloak.conf`. Some of the most
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important parameters are documented as suboptions, the rest can
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be found in the [All
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configuration section of the Keycloak Server Installation and
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Configuration Guide](https://www.keycloak.org/server/all-config).
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Options containing secret data should be set to an attribute
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set containing the attribute `_secret` - a
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string pointing to a file containing the value the option
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should be set to. See the description of
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[](#opt-services.keycloak.settings) for an example.
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## Example configuration {#module-services-keycloak-example-config}
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A basic configuration with some custom settings could look like this:
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```
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services.keycloak = {
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enable = true;
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settings = {
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hostname = "keycloak.example.com";
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hostname-strict-backchannel = true;
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};
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initialAdminPassword = "e6Wcm0RrtegMEHl"; # change on first login
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sslCertificate = "/run/keys/ssl_cert";
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sslCertificateKey = "/run/keys/ssl_key";
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database.passwordFile = "/run/keys/db_password";
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};
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```
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