Move nginx to root directory

pkg/cmd/controller/metrics.go

@@ -0,0 +1,97 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"github.com/golang/glog"
+	"github.com/prometheus/client_golang/prometheus"
+
+	"k8s.io/ingress/controllers/nginx/pkg/metric/collector"
+)
+
+const (
+	ngxStatusPath = "/nginx_status"
+	ngxVtsPath    = "/nginx_status/format/json"
+)
+
+func (n *NGINXController) setupMonitor(sm statusModule) {
+	csm := n.statusModule
+	if csm != sm {
+		glog.Infof("changing prometheus collector from %v to %v", csm, sm)
+		n.stats.stop(csm)
+		n.stats.start(sm)
+		n.statusModule = sm
+	}
+}
+
+type statsCollector struct {
+	process prometheus.Collector
+	basic   collector.Stopable
+	vts     collector.Stopable
+
+	namespace  string
+	watchClass string
+
+	port int
+}
+
+func (s *statsCollector) stop(sm statusModule) {
+	switch sm {
+	case defaultStatusModule:
+		s.basic.Stop()
+		prometheus.Unregister(s.basic)
+	case vtsStatusModule:
+		s.vts.Stop()
+		prometheus.Unregister(s.vts)
+	}
+}
+
+func (s *statsCollector) start(sm statusModule) {
+	switch sm {
+	case defaultStatusModule:
+		s.basic = collector.NewNginxStatus(s.namespace, s.watchClass, s.port, ngxStatusPath)
+		prometheus.Register(s.basic)
+		break
+	case vtsStatusModule:
+		s.vts = collector.NewNGINXVTSCollector(s.namespace, s.watchClass, s.port, ngxVtsPath)
+		prometheus.Register(s.vts)
+		break
+	}
+}
+
+func newStatsCollector(ns, class, binary string, port int) *statsCollector {
+	glog.Infof("starting new nginx stats collector for Ingress controller running in namespace %v (class %v)", ns, class)
+	glog.Infof("collector extracting information from port %v", port)
+	pc, err := collector.NewNamedProcess(true, collector.BinaryNameMatcher{
+		Name:   "nginx",
+		Binary: binary,
+	})
+	if err != nil {
+		glog.Fatalf("unexpected error registering nginx collector: %v", err)
+	}
+	err = prometheus.Register(pc)
+	if err != nil {
+		glog.Fatalf("unexpected error registering nginx collector: %v", err)
+	}
+
+	return &statsCollector{
+		namespace:  ns,
+		watchClass: class,
+		process:    pc,
+		port:       port,
+	}
+}