git mv Ingress ingress

controllers/nginx-alpha/controller.go

@@ -0,0 +1,95 @@
+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+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 (
+	"log"
+	"os"
+	"os/exec"
+	"reflect"
+	"text/template"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/apis/extensions"
+	client "k8s.io/kubernetes/pkg/client/unversioned"
+	"k8s.io/kubernetes/pkg/util"
+)
+
+const (
+	nginxConf = `
+events {
+  worker_connections 1024;
+}
+http {
+  # http://nginx.org/en/docs/http/ngx_http_core_module.html
+  types_hash_max_size 2048;
+  server_names_hash_max_size 512;
+  server_names_hash_bucket_size 64;
+
+{{range $ing := .Items}}
+{{range $rule := $ing.Spec.Rules}}
+  server {
+    listen 80;
+    server_name {{$rule.Host}};
+{{ range $path := $rule.HTTP.Paths }}
+    location {{$path.Path}} {
+      proxy_set_header Host $host;
+      proxy_pass http://{{$path.Backend.ServiceName}}.{{$ing.Namespace}}.svc.cluster.local:{{$path.Backend.ServicePort}};
+    }{{end}}
+  }{{end}}{{end}}
+}`
+)
+
+func shellOut(cmd string) {
+	out, err := exec.Command("sh", "-c", cmd).CombinedOutput()
+	if err != nil {
+		log.Fatalf("Failed to execute %v: %v, err: %v", cmd, string(out), err)
+	}
+}
+
+func main() {
+	var ingClient client.IngressInterface
+	if kubeClient, err := client.NewInCluster(); err != nil {
+		log.Fatalf("Failed to create client: %v.", err)
+	} else {
+		ingClient = kubeClient.Extensions().Ingress(api.NamespaceAll)
+	}
+	tmpl, _ := template.New("nginx").Parse(nginxConf)
+	rateLimiter := util.NewTokenBucketRateLimiter(0.1, 1)
+	known := &extensions.IngressList{}
+
+	// Controller loop
+	shellOut("nginx")
+	for {
+		rateLimiter.Accept()
+		ingresses, err := ingClient.List(api.ListOptions{})
+		if err != nil {
+			log.Printf("Error retrieving ingresses: %v", err)
+			continue
+		}
+		if reflect.DeepEqual(ingresses.Items, known.Items) {
+			continue
+		}
+		known = ingresses
+		if w, err := os.Create("/etc/nginx/nginx.conf"); err != nil {
+			log.Fatalf("Failed to open %v: %v", nginxConf, err)
+		} else if err := tmpl.Execute(w, ingresses); err != nil {
+			log.Fatalf("Failed to write template %v", err)
+		}
+		shellOut("nginx -s reload")
+	}
+}