feat: Add healthz endpoint for kubernetes liveness probe

Author: lukasdietrich

cmd/plaincooking/wire.go

@@ -22,6 +22,7 @@ func InjectServer() (*http.Server, error) {
 		web.NewAssetController,
 		web.NewRecipeController,
 		web.NewSessionController,
+		web.NewProbeController,
 
 		// OpenID Connect
 		oidc.NewProvider,

internal/web/controller.go

@@ -350,3 +350,18 @@ func (c *AssetController) reader(ctx echo.Context, req DownloadAssetRequest) (*s
 
 	return c.assets.Reader(ctx.Request().Context(), req.ID)
 }
+
+type ProbeController struct{}
+
+func NewProbeController() *ProbeController {
+	return &ProbeController{}
+}
+
+// @summary  Check service health
+// @id       healthProbe
+// @tags     probes
+// @router   /healthz  [get]
+// @success  200
+func (c *ProbeController) Health(ctx echo.Context) error {
+	return ctx.NoContent(http.StatusOK)
+}

internal/web/router.go

@@ -20,6 +20,7 @@ func NewRouter(
 	sessions *SessionController,
 	assets *AssetController,
 	recipes *RecipeController,
+	probes *ProbeController,
 ) http.Handler {
 	r := echo.New()
 	r.Binder = new(binder)
@@ -42,6 +43,7 @@ func NewRouter(
 	api := r.Group("/api")
 	api.Use(transactional(transactions))
 
+	api.GET("/healthz", probes.Health)
 	api.GET("/session/info", sessions.UserInfo, oidcSession.Require)
 
 	api.GET("/recipes", recipes.List)