incus-osd/applications: Add openfga app

Signed-off-by: Mathias Gibbens <mathias.gibbens@futurfusion.io>

Author: gibmat

incus-osd/internal/applications/app_openfga.go

@@ -0,0 +1,62 @@
+package applications
+
+import (
+	"context"
+	"crypto/tls"
+	"errors"
+
+	"github.com/lxc/incus-os/incus-osd/internal/systemd"
+)
+
+type openfga struct {
+	common //nolint:unused
+}
+
+// Start starts the systemd unit.
+func (*openfga) Start(ctx context.Context, _ string) error {
+	// Start the unit.
+	return systemd.EnableUnit(ctx, true, "openfga.service")
+}
+
+// Stop stops the systemd unit.
+func (*openfga) Stop(ctx context.Context, _ string) error {
+	// Stop the unit.
+	return systemd.StopUnit(ctx, "openfga.service")
+}
+
+// Update triggers restart after an application update.
+func (*openfga) Update(ctx context.Context, _ string) error {
+	// Reload the systemd daemon to pickup any service definition changes.
+	err := systemd.ReloadDaemon(ctx)
+	if err != nil {
+		return err
+	}
+
+	// Restart the unit.
+	return systemd.RestartUnit(ctx, "openfga.service")
+}
+
+// Initialize runs first time initialization.
+func (*openfga) Initialize(_ context.Context) error {
+	return nil
+}
+
+// IsRunning reports if the application is currently running.
+func (*openfga) IsRunning(ctx context.Context) bool {
+	return systemd.IsActive(ctx, "openfga.service")
+}
+
+// IsPrimary reports if the application is a primary application.
+func (*openfga) IsPrimary() bool {
+	return false
+}
+
+// GetCertificate returns the keypair for the server certificate.
+func (*openfga) GetCertificate() (*tls.Certificate, error) {
+	return nil, errors.New("not supported")
+}
+
+// AddTrustedCertificate adds a new trusted certificate to the application.
+func (*openfga) AddTrustedCertificate(_ context.Context, _ string, _ string) error {
+	return errors.New("not supported")
+}

incus-osd/internal/applications/load.go

@@ -19,6 +19,8 @@ func Load(_ context.Context, name string) (Application, error) {
 		app = &incus{}
 	case "migration-manager":
 		app = &migrationManager{}
+	case "openfga":
+		app = &openfga{}
 	case "operations-center":
 		app = &operationsCenter{}
 	default: