Add code to notify panel when install is completed

api/server_endpoints.go

@@ -97,3 +97,28 @@ func (r *PanelRequest) GetInstallationScript(uuid string) (InstallationScript, *
 
 	return res, nil, nil
 }
+
+type installRequest struct {
+	Successful bool `json:"successful"`
+}
+
+// Marks a server as being installed successfully or unsuccessfully on the panel.
+func (r *PanelRequest) SendInstallationStatus(uuid string, successful bool) (*RequestError, error) {
+	b, err := json.Marshal(installRequest{Successful: successful})
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	resp, err := r.Post(fmt.Sprintf("/servers/%s/install", uuid), b)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+	defer resp.Body.Close()
+
+	r.Response = resp
+	if r.HasError() {
+		return r.Error(), nil
+	}
+
+	return nil, nil
+}

http.go

@@ -424,12 +424,11 @@ func (rt *Router) routeServerInstall(w http.ResponseWriter, r *http.Request, ps
 	s := rt.GetServer(ps.ByName("server"))
 	defer r.Body.Close()
 
-	if err := s.Install(); err != nil {
-		zap.S().Errorw("failed to install server", zap.String("server", s.Uuid), zap.Error(err))
-
-		http.Error(w, "failed to install server", http.StatusInternalServerError)
-		return
+	go func (serv *server.Server) {
+		if err := serv.Install(); err != nil {
+			zap.S().Errorw("failed to execute server installation process", zap.String("server", s.Uuid), zap.Error(err))
 		}
+	}(s)
 
 	w.WriteHeader(http.StatusAccepted)
 }

server/install.go

@@ -18,7 +18,26 @@ import (
 	"sync"
 )
 
+// Executes the installation stack for a server process. Bubbles any errors up to the calling
+// function which should handle contacting the panel to notify it of the server state.
 func (s *Server) Install() error {
+	err := s.internalInstall()
+
+	zap.S().Debugw("notifying panel of server install state", zap.String("server", s.Uuid))
+	if serr := s.SyncInstallState(err == nil); serr != nil {
+		zap.S().Warnw(
+			"failed to notify panel of server install state",
+			zap.String("server", s.Uuid),
+			zap.Bool("was_successful", err == nil),
+			zap.Error(serr),
+		)
+	}
+
+	return err
+}
+
+// Internal installation function used to simplify reporting back to the Panel.
+func (s *Server) internalInstall() error {
 	script, rerr, err := api.NewRequester().GetInstallationScript(s.Uuid)
 	if err != nil || rerr != nil {
 		if err != nil {
@@ -33,15 +52,13 @@ func (s *Server) Install() error {
 		return errors.WithStack(err)
 	}
 
-	go func() {
 	zap.S().Infow("beginning installation process for server", zap.String("server", s.Uuid))
 
 	if err := p.Run(); err != nil {
-			zap.S().Errorw("failed to complete installation process for server", zap.String("server", s.Uuid), zap.Error(err))
+		return err
 	}
 
 	zap.S().Infow("completed installation process for server", zap.String("server", s.Uuid))
-	}()
 
 	return nil
 }
@@ -372,3 +389,22 @@ func (ip *InstallationProcess) StreamOutput(id string) error {
 
 	return nil
 }
+
+// Makes a HTTP request to the Panel instance notifying it that the server has
+// completed the installation process, and what the state of the server is. A boolean
+// value of "true" means everything was successful, "false" means something went
+// wrong and the server must be deleted and re-created.
+func (s *Server) SyncInstallState(successful bool) error {
+	r := api.NewRequester()
+
+	rerr, err := r.SendInstallationStatus(s.Uuid, successful)
+	if rerr != nil || err != nil {
+		if err != nil {
+			return errors.WithStack(err)
+		}
+
+		return errors.New(rerr.String())
+	}
+
+	return nil
+}