Olympus/system/virtualization/docker/authentik/default.nix

{ config, lib, pkgs, ... }: let

    hostPort = 9005;

    subdomain = "auth";

    name = "authentik";

in {

    options.sysconfig.docker.authentik.enable = with lib; mkOption {
        type = with types; bool;
        default = false;
    };

    config = lib.mkIf (config.sysconfig.docker.authentik.enable && config.sysconfig.docker.enable) {
 
        networking.firewall.interfaces = {
            "ve-traefik" = {
                allowedTCPPorts = [ hostPort ];
            };
        };

        sops.secrets = {
            "authentik/pass" = {};
            "authentik/secret_key" = {};
        };

        sops.templates."authentik.env" = {
            content = ''
                PG_PASS=${config.sops.placeholder."authentik/pass"}
                SECRET_KEY=${config.sops.placeholder."authentik/secret_key"}
            '';
        };

        virtualisation.oci-containers.containers."authentik-postgresql" = {
            image = "docker.io/library/postgres:16-alpine";
            environment = {
                "POSTGRES_DB" = "authentik";
                "POSTGRES_PASSWORD" = "\${PG_PASS}";
                "POSTGRES_USER" = "authentik";
            };
            environmentFiles = [ config.sops.templates."authentik.env".path ];
            volumes = [
                "authentik_database:/var/lib/postgresql/data:rw"
            ];
            log-driver = "journald";
            extraOptions = [
                "--health-cmd=pg_isready -d \${POSTGRES_DB} -U \${POSTGRES_USER}"
                    "--health-interval=30s"
                    "--health-retries=5"
                    "--health-start-period=20s"
                    "--health-timeout=5s"
                    "--network-alias=postgresql"
                    "--network=authentik_default"
            ];
        };
        systemd.services."docker-authentik-postgresql" = {
            serviceConfig = {
                Restart = lib.mkOverride 90 "always";
                RestartMaxDelaySec = lib.mkOverride 90 "1m";
                RestartSec = lib.mkOverride 90 "100ms";
                RestartSteps = lib.mkOverride 90 9;
            };
            after = [
                "docker-network-authentik_default.service"
                "docker-volume-authentik_database.service" 
            ];
            requires = [
                "docker-network-authentik_default.service"
                "docker-volume-authentik_database.service" 
            ];
            partOf = [
                "docker-compose-authentik-root.target"
            ];
            wantedBy = [
                "docker-compose-authentik-root.target"
            ];
        };
        virtualisation.oci-containers.containers."authentik-server" = {
            image = "ghcr.io/goauthentik/server:2025.12.1";
            environment = {
                "AUTHENTIK_POSTGRESQL__HOST" = "postgresql";
                "AUTHENTIK_POSTGRESQL__NAME" = "authentik";
                "AUTHENTIK_POSTGRESQL__PASSWORD" = "\${PG_PASS}";
                "AUTHENTIK_POSTGRESQL__USER" = "authentik";
                "AUTHENTIK_SECRET_KEY" = "\${SECRET_KEY}";
            };
            environmentFiles = [ config.sops.templates."authentik.env".path ];
            labels = {
                "traefik.enable" = "true";
                "traefik.http.routers.${name}.entrypoints" = "websecure,localsecure";
                "traefik.http.routers.${name}.rule" = "Host(`${subdomain}.esotericbytes.com`)";
                "traefik.http.routers.${name}.service" = "${name}";
                "traefik.http.routers.${name}.tls.certResolver" = "cloudflare";
                
                #"traefik.http.services.${name}.loadbalancer.server.url" = "http://192.168.100.10:${builtins.toString hostPort}";
                "traefik.http.services.${name}.loadbalancer.server.port" = "9000";
            };
            volumes = [
                "/etc/Authentik/custom-templates:/templates:rw"
                "/etc/Authentik/data:/data:rw"
            ];
            ports = [
                "${builtins.toString hostPort}:9000/tcp"
                #"9443:9443/tcp"
            ];
            cmd = [ "server" ];
            dependsOn = [
                "authentik-postgresql"
            ];
            log-driver = "journald";
            extraOptions = [
                "--network-alias=server"
                "--network-alias=${name}"
            ];
            networks = [
                "docker-main"
                "authentik_default"
            ];
        };
        systemd.services."docker-authentik-server" = {
            serviceConfig = {
                Restart = lib.mkOverride 90 "always";
                RestartMaxDelaySec = lib.mkOverride 90 "1m";
                RestartSec = lib.mkOverride 90 "100ms";
                RestartSteps = lib.mkOverride 90 9;
            };
            after = [
                "docker-network-authentik_default.service"
                "docker-network-setup.service" 
            ];
            requires = [
                "docker-network-authentik_default.service"
                "docker-network-setup.service" 
            ];
            partOf = [
                "docker-compose-authentik-root.target"
            ];
            wantedBy = [
                "docker-compose-authentik-root.target"
            ];
        };
        virtualisation.oci-containers.containers."authentik-worker" = {
            image = "ghcr.io/goauthentik/server:2025.12.1";
            environment = {
                "AUTHENTIK_POSTGRESQL__HOST" = "postgresql";
                "AUTHENTIK_POSTGRESQL__NAME" = "authentik";
                "AUTHENTIK_POSTGRESQL__PASSWORD" = "\${PG_PASS}";
                "AUTHENTIK_POSTGRESQL__USER" = "authentik";
                "AUTHENTIK_SECRET_KEY" = "\${SECRET_KEY}";
            };
            environmentFiles = [ config.sops.templates."authentik.env".path ];
            volumes = [
                "/etc/Authentik/certs:/certs:rw"
                "/etc/Authentik/custom-templates:/templates:rw"
                "/etc/Authentik/data:/data:rw"
                "/var/run/docker.sock:/var/run/docker.sock:rw"
            ];
            cmd = [ "worker" ];
            dependsOn = [
                "authentik-postgresql"
            ];
            user = "root";
            log-driver = "journald";
            extraOptions = [
                "--network-alias=worker"
                "--network=authentik_default"
            ];
        };
        systemd.services."docker-authentik-worker" = {
            serviceConfig = {
                Restart = lib.mkOverride 90 "always";
                RestartMaxDelaySec = lib.mkOverride 90 "1m";
                RestartSec = lib.mkOverride 90 "100ms";
                RestartSteps = lib.mkOverride 90 9;
            };
            after = [
                "docker-network-authentik_default.service"
            ];
            requires = [
                "docker-network-authentik_default.service"
            ];
            partOf = [
                "docker-compose-authentik-root.target"
            ];
            wantedBy = [
                "docker-compose-authentik-root.target"
            ];
        };

# Networks
        systemd.services."docker-network-authentik_default" = {
            path = [ pkgs.docker ];
            serviceConfig = {
                Type = "oneshot";
                RemainAfterExit = true;
                ExecStop = "docker network rm -f authentik_default";
            };
            script = ''
                docker network inspect authentik_default || docker network create authentik_default
                '';
            partOf = [ "docker-compose-authentik-root.target" ];
            wantedBy = [ "docker-compose-authentik-root.target" ];
        };

# Volumes
        systemd.services."docker-volume-authentik_database" = {
            path = [ pkgs.docker ];
            serviceConfig = {
                Type = "oneshot";
                RemainAfterExit = true;
            };
            script = ''
                docker volume inspect authentik_database || docker volume create authentik_database --driver=btrfs
                '';
            partOf = [ "docker-compose-authentik-root.target" ];
            wantedBy = [ "docker-compose-authentik-root.target" ];
        };

# Root service
# When started, this will automatically create all resources and start
# the containers. When stopped, this will teardown all resources.
        systemd.targets."docker-compose-authentik-root" = {
            unitConfig = {
                Description = "Root target generated by compose2nix.";
            };
            wantedBy = [ "multi-user.target" ];
        };
    };
}