HTTP Admin

Makefile

@@ -5,6 +5,10 @@ build:
 		-ldflags "-X github.com/factorysh/microdensity/version.version=$(GIT_VERSION)" \
 	.
 
+build-linux:
+	make build GOOS=linux
+	upx microdensity
+
 TESTS= github.com/factorysh/microdensity/task \
 		github.com/factorysh/microdensity/middlewares/jwt \
 		github.com/factorysh/microdensity/middlewares/project\

application/application.go

@@ -39,12 +39,14 @@ type Application struct {
 	Domain        string
 	GitlabURL     string
 	Router        http.Handler
+	AdminRouter   http.Handler
 	storage       storage.Storage
 	volumes       *volumes.Volumes
 	logger        *zap.Logger
 	queue         *queue.Queue
 	Sink          events.Sink
 	Server        *http.Server
+	AdminServer   *http.Server
 	Stopper       chan (os.Signal)
 }
 
@@ -77,6 +79,14 @@ func New(cfg *conf.Conf) (*Application, error) {
 		logger.Info("There is no Sentry set")
 	}
 
+	ar := chi.NewRouter()
+	ar.Use(middleware.Logger)
+	ar.Use(middleware.Recoverer)
+	ar.Get("/", AdminHomeHandler)
+	ar.Get("/metrics", promhttp.Handler().ServeHTTP)
+	ar.Get("/robots.txt", RobotsHandler)
+	ar.Get("/favicon.png", FaviconHandler)
+
 	sessions := sessions.New()
 	err = sessions.Start(15)
 	if err != nil {
@@ -117,6 +127,7 @@ func New(cfg *conf.Conf) (*Application, error) {
 		serviceFolder: cfg.Services,
 		storage:       s,
 		Router:        MagicPathHandler(r),
+		AdminRouter:   ar,
 		volumes:       v,
 		logger:        logger,
 		queue:         &q,
@@ -137,7 +148,6 @@ func New(cfg *conf.Conf) (*Application, error) {
 	r.Get("/", a.HomeHandler())
 	r.Get("/robots.txt", RobotsHandler)
 	r.Get("/favicon.png", FaviconHandler)
-	r.Get("/metrics", promhttp.Handler().ServeHTTP)
 	r.Get("/oauth/callback", oauth.CallbackHandler(&cfg.OAuth, &sessions))
 
 	r.Get("/services", a.ServicesHandler)
@@ -266,6 +276,21 @@ func (a *Application) Run(listen string) error {
 	return nil
 }
 
+func (a *Application) AdminRun(listen string) error {
+	a.AdminServer = &http.Server{
+		Addr:    listen,
+		Handler: a.AdminRouter,
+	}
+
+	// start and serve
+	go func() {
+		if err := a.AdminServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			a.logger.Fatal("fatal error when running server", zap.Error(err))
+		}
+	}()
+	return nil
+}
+
 // Shutdown the server and put running tasks into interrupted state
 func (a *Application) Shutdown() error {
 	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)

application/home.go

@@ -33,6 +33,15 @@ func acceptsHTML(r *http.Request) bool {
 	return false
 }
 
+const logo = `
+      _               _                                     _
+  ___| |__   ___  ___| | __  _ __ ___  _   _  __      _____| |__
+/  __| '_ \ / _ \/ __| |/ / | '_ ' _ \| | | | \ \ /\ / / _ \ '_ \
+| (__| | | |  __/ (__|   <  | | | | | | |_| |  \ V  V /  __/ |_) |
+\ ___|_| |_|\___|\___|_|\_\ |_| |_| |_|\__, |   \_/\_/ \___|_.__/
+                                       |___/
+	`
+
 // HomeHandler display the home page
 func (a *Application) HomeHandler() http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
@@ -44,14 +53,7 @@ func (a *Application) HomeHandler() http.HandlerFunc {
 		// nice geeky ascii art
 		if !acceptsHTML(r) {
 			w.Header().Set("content-type", "text/plain")
-			w.Write([]byte(`
-      _               _                                     _
-  ___| |__   ___  ___| | __  _ __ ___  _   _  __      _____| |__
-/  __| '_ \ / _ \/ __| |/ / | '_ ' _ \| | | | \ \ /\ / / _ \ '_ \
-| (__| | | |  __/ (__|   <  | | | | | | |_| |  \ V  V /  __/ |_) |
-\ ___|_| |_|\___|\___|_|\_\ |_| |_| |_|\__, |   \_/\_/ \___|_.__/
-                                       |___/
-	`))
+			w.Write([]byte(logo))
 			fmt.Fprintf(w, "Version: %s", version.Version())
 			return
 		}
@@ -72,3 +74,12 @@ func (a *Application) HomeHandler() http.HandlerFunc {
 		}
 	}
 }
+
+func AdminHomeHandler(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("content-type", "text/plain")
+	w.Write([]byte(logo))
+	fmt.Fprintf(w, "Version: %s", version.Version())
+	w.Write([]byte(`
+/metrics Prometheus export
+`))
+}

conf/conf.go

@@ -12,8 +12,9 @@ type Conf struct {
 	Services    string    `yaml:"services"` // Service folder
 	JWKProvider string    `yaml:"jwk_provider"`
 	Listen      string    `yaml:"listen"` // http listen address
+	AdminListen string    `yaml:"admin_listen"`
 	DataPath    string    `yaml:"data_path"`
-	Hosts       []string  `yaml:"hosts"`
+	Hosts       []string  `yaml:"hosts"` // private hostnames for exposing private services, like browserless
 }
 
 func (c *Conf) Defaults() {

main.go

@@ -57,6 +57,14 @@ func main() {
 		l.Error("Run", zap.Error(err))
 		os.Exit(1)
 	}
+	if cfg.AdminListen == "" {
+		cfg.AdminListen = "127.0.0.1:3615"
+	}
+	err = a.AdminRun(cfg.AdminListen)
+	if err != nil {
+		l.Error("AdminRun", zap.Error(err))
+		os.Exit(1)
+	}
 
 	<-a.Stopper
 

run/run.go

@@ -8,6 +8,15 @@ import (
 	"github.com/factorysh/microdensity/task"
 	"github.com/factorysh/microdensity/volumes"
 	"github.com/google/uuid"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+)
+
+var (
+	serviceRun = promauto.NewCounterVec(prometheus.CounterOpts{
+		Name: "run_total",
+		Help: "Total tasks run",
+	}, []string{"service", "project"})
 )
 
 // Context is a run context, with a STDOUT and a STDERR
@@ -86,6 +95,8 @@ func (r *Runner) Run(t *task.Task) (int, error) {
 	if !found {
 		return 0, fmt.Errorf("task with id `%s` not found in runner", t.Id)
 	}
-
+	defer serviceRun.With(prometheus.Labels{
+		"service": t.Service,
+		"project": t.Project}).Inc()
 	return ctx.run.Run(ctx.Stdout, ctx.Stderr)
 }