692 lines
24 KiB
Nix
692 lines
24 KiB
Nix
{ config, options, pkgs, lib, ... }:
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let
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cfg = config.services.keycloak;
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opt = options.services.keycloak;
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inherit (lib)
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types
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mkMerge
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mkOption
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mkChangedOptionModule
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mkRenamedOptionModule
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mkRemovedOptionModule
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mkPackageOption
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concatStringsSep
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mapAttrsToList
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escapeShellArg
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mkIf
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optionalString
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optionals
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mkDefault
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literalExpression
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isAttrs
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literalMD
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maintainers
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catAttrs
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collect
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hasPrefix
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;
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inherit (builtins)
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elem
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typeOf
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isInt
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isString
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hashString
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isPath
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;
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prefixUnlessEmpty = prefix: string: optionalString (string != "") "${prefix}${string}";
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in
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{
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imports =
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[
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(mkRenamedOptionModule
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[ "services" "keycloak" "bindAddress" ]
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[ "services" "keycloak" "settings" "http-host" ])
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(mkRenamedOptionModule
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[ "services" "keycloak" "forceBackendUrlToFrontendUrl"]
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[ "services" "keycloak" "settings" "hostname-strict-backchannel"])
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(mkChangedOptionModule
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[ "services" "keycloak" "httpPort" ]
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[ "services" "keycloak" "settings" "http-port" ]
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(config:
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builtins.fromJSON config.services.keycloak.httpPort))
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(mkChangedOptionModule
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[ "services" "keycloak" "httpsPort" ]
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[ "services" "keycloak" "settings" "https-port" ]
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(config:
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builtins.fromJSON config.services.keycloak.httpsPort))
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(mkRemovedOptionModule
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[ "services" "keycloak" "frontendUrl" ]
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''
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Set `services.keycloak.settings.hostname' and `services.keycloak.settings.http-relative-path' instead.
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NOTE: You likely want to set 'http-relative-path' to '/auth' to keep compatibility with your clients.
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See its description for more information.
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'')
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(mkRemovedOptionModule
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[ "services" "keycloak" "extraConfig" ]
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"Use `services.keycloak.settings' instead.")
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];
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options.services.keycloak =
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let
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inherit (types)
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bool
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str
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int
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nullOr
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attrsOf
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oneOf
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path
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enum
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package
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port;
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assertStringPath = optionName: value:
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if isPath value then
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throw ''
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services.keycloak.${optionName}:
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${toString value}
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is a Nix path, but should be a string, since Nix
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paths are copied into the world-readable Nix store.
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''
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else value;
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in
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{
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enable = mkOption {
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type = bool;
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default = false;
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example = true;
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description = ''
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Whether to enable the Keycloak identity and access management
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server.
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'';
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};
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sslCertificate = mkOption {
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type = nullOr path;
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default = null;
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example = "/run/keys/ssl_cert";
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apply = assertStringPath "sslCertificate";
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description = ''
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The path to a PEM formatted certificate to use for TLS/SSL
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connections.
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'';
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};
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sslCertificateKey = mkOption {
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type = nullOr path;
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default = null;
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example = "/run/keys/ssl_key";
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apply = assertStringPath "sslCertificateKey";
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description = ''
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The path to a PEM formatted private key to use for TLS/SSL
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connections.
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'';
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};
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plugins = lib.mkOption {
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type = lib.types.listOf lib.types.path;
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default = [ ];
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description = ''
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Keycloak plugin jar, ear files or derivations containing
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them. Packaged plugins are available through
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`pkgs.keycloak.plugins`.
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'';
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};
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database = {
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type = mkOption {
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type = enum [ "mysql" "mariadb" "postgresql" ];
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default = "postgresql";
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example = "mariadb";
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description = ''
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The type of database Keycloak should connect to.
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'';
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};
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host = mkOption {
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type = str;
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default = "localhost";
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description = ''
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Hostname of the database to connect to.
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'';
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};
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port =
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let
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dbPorts = {
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postgresql = 5432;
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mariadb = 3306;
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mysql = 3306;
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};
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in
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mkOption {
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type = port;
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default = dbPorts.${cfg.database.type};
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defaultText = literalMD "default port of selected database";
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description = ''
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Port of the database to connect to.
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'';
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};
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useSSL = mkOption {
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type = bool;
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default = cfg.database.host != "localhost";
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defaultText = literalExpression ''config.${opt.database.host} != "localhost"'';
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description = ''
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Whether the database connection should be secured by SSL /
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TLS.
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'';
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};
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caCert = mkOption {
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type = nullOr path;
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default = null;
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description = ''
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The SSL / TLS CA certificate that verifies the identity of the
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database server.
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Required when PostgreSQL is used and SSL is turned on.
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For MySQL, if left at `null`, the default
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Java keystore is used, which should suffice if the server
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certificate is issued by an official CA.
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'';
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};
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createLocally = mkOption {
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type = bool;
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default = true;
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description = ''
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Whether a database should be automatically created on the
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local host. Set this to false if you plan on provisioning a
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local database yourself. This has no effect if
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services.keycloak.database.host is customized.
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'';
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};
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name = mkOption {
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type = str;
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default = "keycloak";
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description = ''
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Database name to use when connecting to an external or
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manually provisioned database; has no effect when a local
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database is automatically provisioned.
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To use this with a local database, set [](#opt-services.keycloak.database.createLocally) to
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`false` and create the database and user
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manually.
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'';
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};
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username = mkOption {
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type = str;
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default = "keycloak";
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description = ''
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Username to use when connecting to an external or manually
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provisioned database; has no effect when a local database is
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automatically provisioned.
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To use this with a local database, set [](#opt-services.keycloak.database.createLocally) to
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`false` and create the database and user
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manually.
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'';
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};
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passwordFile = mkOption {
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type = path;
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example = "/run/keys/db_password";
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apply = assertStringPath "passwordFile";
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description = ''
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The path to a file containing the database password.
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'';
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};
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};
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package = mkPackageOption pkgs "keycloak" { };
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initialAdminPassword = mkOption {
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type = str;
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default = "changeme";
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description = ''
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Initial password set for the `admin`
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user. The password is not stored safely and should be changed
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immediately in the admin panel.
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'';
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};
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themes = mkOption {
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type = attrsOf package;
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default = { };
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description = ''
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Additional theme packages for Keycloak. Each theme is linked into
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subdirectory with a corresponding attribute name.
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Theme packages consist of several subdirectories which provide
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different theme types: for example, `account`,
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`login` etc. After adding a theme to this option you
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can select it by its name in Keycloak administration console.
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'';
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};
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settings = mkOption {
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type = lib.types.submodule {
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freeformType = attrsOf (nullOr (oneOf [ str int bool (attrsOf path) ]));
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options = {
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http-host = mkOption {
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type = str;
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default = "0.0.0.0";
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example = "127.0.0.1";
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description = ''
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On which address Keycloak should accept new connections.
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'';
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};
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http-port = mkOption {
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type = port;
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default = 80;
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example = 8080;
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description = ''
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On which port Keycloak should listen for new HTTP connections.
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'';
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};
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https-port = mkOption {
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type = port;
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default = 443;
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example = 8443;
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description = ''
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On which port Keycloak should listen for new HTTPS connections.
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'';
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};
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http-relative-path = mkOption {
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type = str;
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default = "/";
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example = "/auth";
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apply = x: if !(hasPrefix "/") x then "/" + x else x;
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description = ''
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The path relative to `/` for serving
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resources.
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::: {.note}
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In versions of Keycloak using Wildfly (<17),
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this defaulted to `/auth`. If
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upgrading from the Wildfly version of Keycloak,
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i.e. a NixOS version before 22.05, you'll likely
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want to set this to `/auth` to
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keep compatibility with your clients.
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See <https://www.keycloak.org/migration/migrating-to-quarkus>
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for more information on migrating from Wildfly to Quarkus.
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:::
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'';
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};
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hostname = mkOption {
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type = nullOr str;
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example = "keycloak.example.com";
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description = ''
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The hostname part of the public URL used as base for
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all frontend requests.
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See <https://www.keycloak.org/server/hostname>
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for more information about hostname configuration.
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'';
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};
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hostname-backchannel-dynamic = mkOption {
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type = bool;
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default = false;
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example = true;
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description = ''
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Enables dynamic resolving of backchannel URLs,
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including hostname, scheme, port and context path.
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See <https://www.keycloak.org/server/hostname>
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for more information about hostname configuration.
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'';
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};
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proxy = mkOption {
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type = enum [ "edge" "reencrypt" "passthrough" "none" ];
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default = "none";
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example = "edge";
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description = ''
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The proxy address forwarding mode if the server is
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behind a reverse proxy.
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- `edge`:
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Enables communication through HTTP between the
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proxy and Keycloak.
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- `reencrypt`:
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Requires communication through HTTPS between the
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proxy and Keycloak.
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- `passthrough`:
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Enables communication through HTTP or HTTPS between
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the proxy and Keycloak.
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See <https://www.keycloak.org/server/reverseproxy> for more information.
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'';
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};
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};
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};
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example = literalExpression ''
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{
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hostname = "keycloak.example.com";
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proxy = "reencrypt";
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https-key-store-file = "/path/to/file";
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https-key-store-password = { _secret = "/run/keys/store_password"; };
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}
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'';
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description = ''
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Configuration options corresponding to parameters set in
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{file}`conf/keycloak.conf`.
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Most available options are documented at <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 example to get a better picture of
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this: in the resulting
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{file}`conf/keycloak.conf` file, the
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`https-key-store-password` key will be set
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to the contents of the
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{file}`/run/keys/store_password` file.
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'';
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};
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};
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config =
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let
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# We only want to create a database if we're actually going to
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# connect to it.
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databaseActuallyCreateLocally = cfg.database.createLocally && cfg.database.host == "localhost";
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createLocalPostgreSQL = databaseActuallyCreateLocally && cfg.database.type == "postgresql";
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createLocalMySQL = databaseActuallyCreateLocally && elem cfg.database.type [ "mysql" "mariadb" ];
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mySqlCaKeystore = pkgs.runCommand "mysql-ca-keystore" { } ''
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${pkgs.jre}/bin/keytool -importcert -trustcacerts -alias MySQLCACert -file ${cfg.database.caCert} -keystore $out -storepass notsosecretpassword -noprompt
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'';
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# Both theme and theme type directories need to be actual
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# directories in one hierarchy to pass Keycloak checks.
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themesBundle = pkgs.runCommand "keycloak-themes" { } ''
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linkTheme() {
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theme="$1"
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name="$2"
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mkdir "$out/$name"
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for typeDir in "$theme"/*; do
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if [ -d "$typeDir" ]; then
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type="$(basename "$typeDir")"
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mkdir "$out/$name/$type"
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for file in "$typeDir"/*; do
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ln -sn "$file" "$out/$name/$type/$(basename "$file")"
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done
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fi
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done
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}
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mkdir -p "$out"
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for theme in ${keycloakBuild}/themes/*; do
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if [ -d "$theme" ]; then
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linkTheme "$theme" "$(basename "$theme")"
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fi
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done
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${concatStringsSep "\n" (mapAttrsToList (name: theme: "linkTheme ${theme} ${escapeShellArg name}") cfg.themes)}
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'';
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keycloakConfig = lib.generators.toKeyValue {
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mkKeyValue = lib.flip lib.generators.mkKeyValueDefault "=" {
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mkValueString = v:
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if isInt v then toString v
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else if isString v then v
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else if true == v then "true"
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else if false == v then "false"
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else if isSecret v then hashString "sha256" v._secret
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else throw "unsupported type ${typeOf v}: ${(lib.generators.toPretty {}) v}";
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};
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};
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isSecret = v: isAttrs v && v ? _secret && isString v._secret;
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filteredConfig = lib.converge (lib.filterAttrsRecursive (_: v: ! elem v [{ } null])) cfg.settings;
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confFile = pkgs.writeText "keycloak.conf" (keycloakConfig filteredConfig);
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keycloakBuild = cfg.package.override {
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inherit confFile;
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plugins = cfg.package.enabledPlugins ++ cfg.plugins ++
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(with cfg.package.plugins; [quarkus-systemd-notify quarkus-systemd-notify-deployment]);
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};
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in
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mkIf cfg.enable
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{
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assertions = [
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{
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assertion = (cfg.database.useSSL && cfg.database.type == "postgresql") -> (cfg.database.caCert != null);
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message = "A CA certificate must be specified (in 'services.keycloak.database.caCert') when PostgreSQL is used with SSL";
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}
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{
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assertion = createLocalPostgreSQL -> config.services.postgresql.settings.standard_conforming_strings or true;
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message = "Setting up a local PostgreSQL db for Keycloak requires `standard_conforming_strings` turned on to work reliably";
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}
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{
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assertion = cfg.settings.hostname != null || ! cfg.settings.hostname-strict or true;
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message = "Setting the Keycloak hostname is required, see `services.keycloak.settings.hostname`";
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}
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{
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assertion = cfg.settings.hostname-url or null == null;
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message = ''
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The option `services.keycloak.settings.hostname-url' has been removed.
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Set `services.keycloak.settings.hostname' instead.
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See [New Hostname options](https://www.keycloak.org/docs/25.0.0/upgrading/#new-hostname-options) for details.
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'';
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}
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{
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assertion = cfg.settings.hostname-strict-backchannel or null == null;
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message = ''
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The option `services.keycloak.settings.hostname-strict-backchannel' has been removed.
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Set `services.keycloak.settings.hostname-backchannel-dynamic' instead.
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See [New Hostname options](https://www.keycloak.org/docs/25.0.0/upgrading/#new-hostname-options) for details.
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'';
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}
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];
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environment.systemPackages = [ keycloakBuild ];
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services.keycloak.settings =
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let
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postgresParams = concatStringsSep "&" (
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optionals cfg.database.useSSL [
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"ssl=true"
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] ++ optionals (cfg.database.caCert != null) [
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"sslrootcert=${cfg.database.caCert}"
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"sslmode=verify-ca"
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]
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);
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mariadbParams = concatStringsSep "&" ([
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"characterEncoding=UTF-8"
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] ++ optionals cfg.database.useSSL [
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"useSSL=true"
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"requireSSL=true"
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"verifyServerCertificate=true"
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] ++ optionals (cfg.database.caCert != null) [
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"trustCertificateKeyStoreUrl=file:${mySqlCaKeystore}"
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"trustCertificateKeyStorePassword=notsosecretpassword"
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]);
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dbProps = if cfg.database.type == "postgresql" then postgresParams else mariadbParams;
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in
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mkMerge [
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{
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db = if cfg.database.type == "postgresql" then "postgres" else cfg.database.type;
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db-username = if databaseActuallyCreateLocally then "keycloak" else cfg.database.username;
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db-password._secret = cfg.database.passwordFile;
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db-url-host = cfg.database.host;
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db-url-port = toString cfg.database.port;
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db-url-database = if databaseActuallyCreateLocally then "keycloak" else cfg.database.name;
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db-url-properties = prefixUnlessEmpty "?" dbProps;
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db-url = null;
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}
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(mkIf (cfg.sslCertificate != null && cfg.sslCertificateKey != null) {
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https-certificate-file = "/run/keycloak/ssl/ssl_cert";
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https-certificate-key-file = "/run/keycloak/ssl/ssl_key";
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})
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];
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systemd.services.keycloakPostgreSQLInit = mkIf createLocalPostgreSQL {
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after = [ "postgresql.service" ];
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before = [ "keycloak.service" ];
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bindsTo = [ "postgresql.service" ];
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path = [ config.services.postgresql.package ];
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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|
User = "postgres";
|
|
Group = "postgres";
|
|
LoadCredential = [ "db_password:${cfg.database.passwordFile}" ];
|
|
};
|
|
script = ''
|
|
set -o errexit -o pipefail -o nounset -o errtrace
|
|
shopt -s inherit_errexit
|
|
|
|
create_role="$(mktemp)"
|
|
trap 'rm -f "$create_role"' EXIT
|
|
|
|
# Read the password from the credentials directory and
|
|
# escape any single quotes by adding additional single
|
|
# quotes after them, following the rules laid out here:
|
|
# https://www.postgresql.org/docs/current/sql-syntax-lexical.html#SQL-SYNTAX-CONSTANTS
|
|
db_password="$(<"$CREDENTIALS_DIRECTORY/db_password")"
|
|
db_password="''${db_password//\'/\'\'}"
|
|
|
|
echo "CREATE ROLE keycloak WITH LOGIN PASSWORD '$db_password' CREATEDB" > "$create_role"
|
|
psql -tAc "SELECT 1 FROM pg_roles WHERE rolname='keycloak'" | grep -q 1 || psql -tA --file="$create_role"
|
|
psql -tAc "SELECT 1 FROM pg_database WHERE datname = 'keycloak'" | grep -q 1 || psql -tAc 'CREATE DATABASE "keycloak" OWNER "keycloak"'
|
|
'';
|
|
};
|
|
|
|
systemd.services.keycloakMySQLInit = mkIf createLocalMySQL {
|
|
after = [ "mysql.service" ];
|
|
before = [ "keycloak.service" ];
|
|
bindsTo = [ "mysql.service" ];
|
|
path = [ config.services.mysql.package ];
|
|
serviceConfig = {
|
|
Type = "oneshot";
|
|
RemainAfterExit = true;
|
|
User = config.services.mysql.user;
|
|
Group = config.services.mysql.group;
|
|
LoadCredential = [ "db_password:${cfg.database.passwordFile}" ];
|
|
};
|
|
script = ''
|
|
set -o errexit -o pipefail -o nounset -o errtrace
|
|
shopt -s inherit_errexit
|
|
|
|
# Read the password from the credentials directory and
|
|
# escape any single quotes by adding additional single
|
|
# quotes after them, following the rules laid out here:
|
|
# https://dev.mysql.com/doc/refman/8.0/en/string-literals.html
|
|
db_password="$(<"$CREDENTIALS_DIRECTORY/db_password")"
|
|
db_password="''${db_password//\'/\'\'}"
|
|
|
|
( echo "SET sql_mode = 'NO_BACKSLASH_ESCAPES';"
|
|
echo "CREATE USER IF NOT EXISTS 'keycloak'@'localhost' IDENTIFIED BY '$db_password';"
|
|
echo "CREATE DATABASE IF NOT EXISTS keycloak CHARACTER SET utf8 COLLATE utf8_unicode_ci;"
|
|
echo "GRANT ALL PRIVILEGES ON keycloak.* TO 'keycloak'@'localhost';"
|
|
) | mysql -N
|
|
'';
|
|
};
|
|
|
|
systemd.services.keycloak =
|
|
let
|
|
databaseServices =
|
|
if createLocalPostgreSQL then [
|
|
"keycloakPostgreSQLInit.service"
|
|
"postgresql.service"
|
|
]
|
|
else if createLocalMySQL then [
|
|
"keycloakMySQLInit.service"
|
|
"mysql.service"
|
|
]
|
|
else [ ];
|
|
secretPaths = catAttrs "_secret" (collect isSecret cfg.settings);
|
|
mkSecretReplacement = file: ''
|
|
replace-secret ${hashString "sha256" file} $CREDENTIALS_DIRECTORY/${baseNameOf file} /run/keycloak/conf/keycloak.conf
|
|
'';
|
|
secretReplacements = lib.concatMapStrings mkSecretReplacement secretPaths;
|
|
in
|
|
{
|
|
after = databaseServices;
|
|
bindsTo = databaseServices;
|
|
wantedBy = [ "multi-user.target" ];
|
|
path = with pkgs; [
|
|
keycloakBuild
|
|
openssl
|
|
replace-secret
|
|
];
|
|
environment = {
|
|
KC_HOME_DIR = "/run/keycloak";
|
|
KC_CONF_DIR = "/run/keycloak/conf";
|
|
};
|
|
serviceConfig = {
|
|
LoadCredential =
|
|
map (p: "${baseNameOf p}:${p}") secretPaths
|
|
++ optionals (cfg.sslCertificate != null && cfg.sslCertificateKey != null) [
|
|
"ssl_cert:${cfg.sslCertificate}"
|
|
"ssl_key:${cfg.sslCertificateKey}"
|
|
];
|
|
User = "keycloak";
|
|
Group = "keycloak";
|
|
DynamicUser = true;
|
|
RuntimeDirectory = "keycloak";
|
|
RuntimeDirectoryMode = "0700";
|
|
AmbientCapabilities = "CAP_NET_BIND_SERVICE";
|
|
Type = "notify"; # Requires quarkus-systemd-notify plugin
|
|
NotifyAccess = "all";
|
|
};
|
|
script = ''
|
|
set -o errexit -o pipefail -o nounset -o errtrace
|
|
shopt -s inherit_errexit
|
|
|
|
umask u=rwx,g=,o=
|
|
|
|
ln -s ${themesBundle} /run/keycloak/themes
|
|
ln -s ${keycloakBuild}/providers /run/keycloak/
|
|
|
|
install -D -m 0600 ${confFile} /run/keycloak/conf/keycloak.conf
|
|
|
|
${secretReplacements}
|
|
|
|
# Escape any backslashes in the db parameters, since
|
|
# they're otherwise unexpectedly read as escape
|
|
# sequences.
|
|
sed -i '/db-/ s|\\|\\\\|g' /run/keycloak/conf/keycloak.conf
|
|
|
|
'' + optionalString (cfg.sslCertificate != null && cfg.sslCertificateKey != null) ''
|
|
mkdir -p /run/keycloak/ssl
|
|
cp $CREDENTIALS_DIRECTORY/ssl_{cert,key} /run/keycloak/ssl/
|
|
'' + ''
|
|
export KEYCLOAK_ADMIN=admin
|
|
export KEYCLOAK_ADMIN_PASSWORD=${escapeShellArg cfg.initialAdminPassword}
|
|
kc.sh --verbose start --optimized
|
|
'';
|
|
};
|
|
|
|
services.postgresql.enable = mkDefault createLocalPostgreSQL;
|
|
services.mysql.enable = mkDefault createLocalMySQL;
|
|
services.mysql.package =
|
|
let
|
|
dbPkg = if cfg.database.type == "mariadb" then pkgs.mariadb else pkgs.mysql80;
|
|
in
|
|
mkIf createLocalMySQL (mkDefault dbPkg);
|
|
};
|
|
|
|
meta.doc = ./keycloak.md;
|
|
meta.maintainers = [ maintainers.talyz ];
|
|
}
|