Add namespaces endpoint

This is being added because multiple namespaces can now be used
on Kubernetes. By listing namespaces, a client such as the UI
or CLI can then enumerate the namespaces to find functions
which may span across more than one namespace.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

gateway/Gopkg.lock

@@ -93,15 +93,15 @@
   version = "v1.0.0"
 
 [[projects]]
-  digest = "1:9e4fe15cd865c2200690de4722f7115eb85ae5fdb22b8215d54d890563e92536"
+  digest = "1:5e3d58f3f10333495afd0248507ef369bfc4a938ff679d568f7ac38af1e067dd"
   name = "github.com/openfaas/faas-provider"
   packages = [
     "auth",
     "types",
   ]
   pruneopts = "UT"
-  revision = "ba3fa3b0ae00f0b9222851f3e03b2e6ea8672998"
-  version = "0.10.1"
+  revision = "eafd85a3b360d8e0982c3a1db43e6d5fee9b85e2"
+  version = "0.10.2"
 
 [[projects]]
   digest = "1:f7b0087a32b4f017ce89562494ae510f21e7d22e70cc1911640a32ebe583e92e"

gateway/Gopkg.toml

@@ -6,7 +6,7 @@ ignored = ["github.com/openfaas/faas/gateway/queue"]
 
 [[constraint]]
   name = "github.com/openfaas/faas-provider"
-  version = "0.10.1"
+  version = "0.10.2"
  
 [[constraint]]
   name = "github.com/gorilla/mux"

gateway/server.go

@@ -114,9 +114,12 @@ func main() {
 	faasHandlers.DeleteFunction = handlers.MakeForwardingProxyHandler(reverseProxy, forwardingNotifiers, urlResolver, nilURLTransformer, serviceAuthInjector)
 	faasHandlers.UpdateFunction = handlers.MakeForwardingProxyHandler(reverseProxy, forwardingNotifiers, urlResolver, nilURLTransformer, serviceAuthInjector)
 	faasHandlers.QueryFunction = handlers.MakeForwardingProxyHandler(reverseProxy, forwardingNotifiers, urlResolver, nilURLTransformer, serviceAuthInjector)
+
 	faasHandlers.InfoHandler = handlers.MakeInfoHandler(handlers.MakeForwardingProxyHandler(reverseProxy, forwardingNotifiers, urlResolver, nilURLTransformer, serviceAuthInjector))
 	faasHandlers.SecretHandler = handlers.MakeForwardingProxyHandler(reverseProxy, forwardingNotifiers, urlResolver, nilURLTransformer, serviceAuthInjector)
 
+	faasHandlers.NamespaceListerHandler = handlers.MakeForwardingProxyHandler(reverseProxy, forwardingNotifiers, urlResolver, nilURLTransformer, serviceAuthInjector)
+
 	externalServiceQuery := plugin.NewExternalServiceQuery(*config.FunctionsProviderURL, serviceAuthInjector)
 	faasHandlers.Alert = handlers.MakeNotifierWrapper(
 		handlers.MakeAlertHandler(externalServiceQuery, config.Namespace),
@@ -177,6 +180,8 @@ func main() {
 			decorateExternalAuth(faasHandlers.SecretHandler, config.UpstreamTimeout, config.AuthProxyURL, config.AuthProxyPassBody)
 		faasHandlers.LogProxyHandler =
 			decorateExternalAuth(faasHandlers.LogProxyHandler, config.UpstreamTimeout, config.AuthProxyURL, config.AuthProxyPassBody)
+		faasHandlers.NamespaceListerHandler =
+			decorateExternalAuth(faasHandlers.NamespaceListerHandler, config.UpstreamTimeout, config.AuthProxyURL, config.AuthProxyPassBody)
 	}
 
 	r := mux.NewRouter()
@@ -213,6 +218,8 @@ func main() {
 	r.HandleFunc("/system/secrets", faasHandlers.SecretHandler).Methods(http.MethodGet, http.MethodPut, http.MethodPost, http.MethodDelete)
 	r.HandleFunc("/system/logs", faasHandlers.LogProxyHandler).Methods(http.MethodGet)
 
+	r.HandleFunc("/system/namespaces", faasHandlers.NamespaceListerHandler).Methods(http.MethodGet)
+
 	if faasHandlers.QueuedProxy != nil {
 		r.HandleFunc("/async-function/{name:["+NameExpression+"]+}/", faasHandlers.QueuedProxy).Methods(http.MethodPost)
 		r.HandleFunc("/async-function/{name:["+NameExpression+"]+}", faasHandlers.QueuedProxy).Methods(http.MethodPost)

gateway/types/handler_set.go

@@ -14,24 +14,27 @@ type HandlerSet struct {
 
 	UpdateFunction http.HandlerFunc
 
-	// QueryFunction - queries the metdata for a function
+	// QueryFunction queries the metdata for a function
 	QueryFunction http.HandlerFunc
 
-	// QueuedProxy - queue work and return synchronous response
+	// QueuedProxy queue work and return synchronous response
 	QueuedProxy http.HandlerFunc
 
-	// AsyncReport - report a deferred execution result
+	// AsyncReport report a deferred execution result
 	AsyncReport http.HandlerFunc
 
-	// ScaleFunction allows a function to be scaled
+	// ScaleFunction enables a function to be scaled
 	ScaleFunction http.HandlerFunc
 
 	// InfoHandler provides version and build info
 	InfoHandler http.HandlerFunc
 
-	// SecretHandler allows secrets to be managed
+	// SecretHandler enables secrets to be managed
 	SecretHandler http.HandlerFunc
 
-	// LogProxyHandler allows streaming of logs for functions
+	// LogProxyHandler enables streaming of logs for functions
 	LogProxyHandler http.HandlerFunc
+
+	// NamespaceListerHandler lists namespaces
+	NamespaceListerHandler http.HandlerFunc
 }

gateway/vendor/github.com/openfaas/faas-provider/types/config.go

@@ -7,11 +7,13 @@ import (
 
 // FaaSHandlers provide handlers for OpenFaaS
 type FaaSHandlers struct {
-	FunctionReader http.HandlerFunc
-	DeployHandler  http.HandlerFunc
 	// FunctionProxy provides the function invocation proxy logic.  Use proxy.NewHandlerFunc to
 	// use the standard OpenFaaS proxy implementation or provide completely custom proxy logic.
-	FunctionProxy  http.HandlerFunc
+	FunctionProxy http.HandlerFunc
+
+	FunctionReader http.HandlerFunc
+	DeployHandler  http.HandlerFunc
+
 	DeleteHandler  http.HandlerFunc
 	ReplicaReader  http.HandlerFunc
 	ReplicaUpdater http.HandlerFunc
@@ -19,10 +21,11 @@ type FaaSHandlers struct {
 	// LogHandler provides streaming json logs of functions
 	LogHandler http.HandlerFunc
 
-	// Optional: Update an existing function
-	UpdateHandler http.HandlerFunc
-	HealthHandler http.HandlerFunc
-	InfoHandler   http.HandlerFunc
+	// UpdateHandler an existing function/service
+	UpdateHandler        http.HandlerFunc
+	HealthHandler        http.HandlerFunc
+	InfoHandler          http.HandlerFunc
+	ListNamespaceHandler http.HandlerFunc
 }
 
 // FaaSConfig set config for HTTP handlers