Feat: healthz endpoint for health checks

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Support for Redis in Sentinel mode
 - Redis support for `irma keyshare server` and `irma keyshare myirmaserver`
+- `/healthz` endpoint for `irma server`, `irma keyshare server` and `irma keyshare myirmaserver`
 
 ### Changed
 - Using optimistic locking in the `irma server` instead of pessimistic locking

server/keyshare/keyshareserver/server.go

@@ -118,6 +118,10 @@ func (s *Server) Handler() http.Handler {
 
 		s.routeHandler(router)
 
+		router.Get("/healthz", func(w http.ResponseWriter, r *http.Request) {
+			server.WriteString(w, "OK")
+		})
+
 		router.Route("/api/v1", func(r chi.Router) {
 			s.routeHandler(r)
 		})

server/keyshare/myirmaserver/server.go

@@ -107,6 +107,10 @@ func (s *Server) Handler() http.Handler {
 		opts := server.LogOptions{Response: true, Headers: true, From: false, EncodeBinary: false}
 		router.Use(server.LogMiddleware("keyshare-myirma", opts))
 
+		router.Get("/healthz", func(w http.ResponseWriter, r *http.Request) {
+			server.WriteString(w, "OK")
+		})
+
 		// Login/logout
 		router.Post("/login/irma", s.handleIrmaLogin)
 		router.Post("/login/email", s.handleEmailLogin)

server/requestorserver/server.go

@@ -198,6 +198,10 @@ func (s *Server) Handler() http.Handler {
 		r.Use(cors.New(corsOptions).Handler)
 		r.Use(server.LogMiddleware("requestor", log))
 
+		router.Get("/healthz", func(w http.ResponseWriter, r *http.Request) {
+			server.WriteString(w, "OK")
+		})
+
 		// Server routes
 		r.Route("/session", func(r chi.Router) {
 			r.Post("/", s.handleCreateSession)