Rename controller to nginx

controllers/nginx/utils.go

@@ -0,0 +1,176 @@
+/*
+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 (
+	"fmt"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/golang/glog"
+
+	"k8s.io/kubernetes/pkg/client/cache"
+	"k8s.io/kubernetes/pkg/client/unversioned"
+	"k8s.io/kubernetes/pkg/util/wait"
+	"k8s.io/kubernetes/pkg/util/workqueue"
+)
+
+// StoreToIngressLister makes a Store that lists Ingress.
+type StoreToIngressLister struct {
+	cache.Store
+}
+
+// taskQueue manages a work queue through an independent worker that
+// invokes the given sync function for every work item inserted.
+type taskQueue struct {
+	// queue is the work queue the worker polls
+	queue *workqueue.Type
+	// sync is called for each item in the queue
+	sync func(string)
+	// workerDone is closed when the worker exits
+	workerDone chan struct{}
+}
+
+func (t *taskQueue) run(period time.Duration, stopCh <-chan struct{}) {
+	wait.Until(t.worker, period, stopCh)
+}
+
+// enqueue enqueues ns/name of the given api object in the task queue.
+func (t *taskQueue) enqueue(obj interface{}) {
+	key, err := keyFunc(obj)
+	if err != nil {
+		glog.Infof("could not get key for object %+v: %v", obj, err)
+		return
+	}
+	t.queue.Add(key)
+}
+
+func (t *taskQueue) requeue(key string, err error) {
+	glog.V(3).Infof("requeuing %v, err %v", key, err)
+	t.queue.Add(key)
+}
+
+// worker processes work in the queue through sync.
+func (t *taskQueue) worker() {
+	for {
+		key, quit := t.queue.Get()
+		if quit {
+			close(t.workerDone)
+			return
+		}
+		glog.V(3).Infof("syncing %v", key)
+		t.sync(key.(string))
+		t.queue.Done(key)
+	}
+}
+
+// shutdown shuts down the work queue and waits for the worker to ACK
+func (t *taskQueue) shutdown() {
+	t.queue.ShutDown()
+	<-t.workerDone
+}
+
+// NewTaskQueue creates a new task queue with the given sync function.
+// The sync function is called for every element inserted into the queue.
+func NewTaskQueue(syncFn func(string)) *taskQueue {
+	return &taskQueue{
+		queue:      workqueue.New(),
+		sync:       syncFn,
+		workerDone: make(chan struct{}),
+	}
+}
+
+// getLBDetails returns runtime information about the pod (name, IP) and replication
+// controller or daemonset (namespace and name).
+// This is required to watch for changes in annotations or configuration (ConfigMap)
+func getLBDetails(kubeClient *unversioned.Client) (*lbInfo, error) {
+	podIP := os.Getenv("POD_IP")
+	podName := os.Getenv("POD_NAME")
+	podNs := os.Getenv("POD_NAMESPACE")
+
+	pod, _ := kubeClient.Pods(podNs).Get(podName)
+	if pod == nil {
+		return nil, fmt.Errorf("Unable to get POD information")
+	}
+
+	return &lbInfo{
+		PodIP:        podIP,
+		Podname:      podName,
+		PodNamespace: podNs,
+	}, nil
+}
+
+func isValidService(kubeClient *unversioned.Client, name string) error {
+	if name == "" {
+		return fmt.Errorf("empty string is not a valid service name")
+	}
+
+	parts := strings.Split(name, "/")
+	if len(parts) != 2 {
+		return fmt.Errorf("invalid name format (namespace/name) in service '%v'", name)
+	}
+
+	_, err := kubeClient.Services(parts[0]).Get(parts[1])
+	return err
+}
+
+func isHostValid(host string, cns []string) bool {
+	for _, cn := range cns {
+		if matchHostnames(cn, host) {
+			return true
+		}
+	}
+
+	return false
+}
+
+func matchHostnames(pattern, host string) bool {
+	host = strings.TrimSuffix(host, ".")
+	pattern = strings.TrimSuffix(pattern, ".")
+
+	if len(pattern) == 0 || len(host) == 0 {
+		return false
+	}
+
+	patternParts := strings.Split(pattern, ".")
+	hostParts := strings.Split(host, ".")
+
+	if len(patternParts) != len(hostParts) {
+		return false
+	}
+
+	for i, patternPart := range patternParts {
+		if i == 0 && patternPart == "*" {
+			continue
+		}
+		if patternPart != hostParts[i] {
+			return false
+		}
+	}
+
+	return true
+}
+
+func parseNsName(input string) (string, string, error) {
+	nsName := strings.Split(input, "/")
+	if len(nsName) != 2 {
+		return "", "", fmt.Errorf("invalid format (namespace/name) found in '%v'", input)
+	}
+
+	return nsName[0], nsName[1], nil
+}