git mv Ingress ingress

controllers/nginx-third-party/nginx/utils.go

@@ -0,0 +1,139 @@
+/*
+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 nginx
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"reflect"
+	"strings"
+
+	"github.com/golang/glog"
+)
+
+// SyncIngress creates a GET request to nginx to indicate that is required to refresh the Ingress rules.
+func (ngx *NginxManager) SyncIngress(ingList []interface{}) error {
+	encData, _ := json.Marshal(ingList)
+	req, err := http.NewRequest("POST", "http://127.0.0.1:8080/update-ingress", bytes.NewBuffer(encData))
+	req.Header.Set("Content-Type", "application/json")
+	res, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return err
+	}
+	defer res.Body.Close()
+
+	if res.StatusCode != 200 {
+		body, _ := ioutil.ReadAll(res.Body)
+		glog.Errorf("Error: %v", string(body))
+		return fmt.Errorf("nginx status is unhealthy")
+	}
+
+	return nil
+
+}
+
+// IsHealthy checks if nginx is running
+func (ngx *NginxManager) IsHealthy() error {
+	res, err := http.Get("http://127.0.0.1:8080/healthz")
+	if err != nil {
+		return err
+	}
+	defer res.Body.Close()
+
+	if res.StatusCode != 200 {
+		return fmt.Errorf("nginx status is unhealthy")
+	}
+
+	return nil
+}
+
+// getDnsServers returns the list of nameservers located in the file /etc/resolv.conf
+func getDnsServers() []string {
+	file, err := ioutil.ReadFile("/etc/resolv.conf")
+	if err != nil {
+		return []string{}
+	}
+
+	// Lines of the form "nameserver 1.2.3.4" accumulate.
+	nameservers := []string{}
+
+	lines := strings.Split(string(file), "\n")
+	for l := range lines {
+		trimmed := strings.TrimSpace(lines[l])
+		if strings.HasPrefix(trimmed, "#") {
+			continue
+		}
+		fields := strings.Fields(trimmed)
+		if len(fields) == 0 {
+			continue
+		}
+		if fields[0] == "nameserver" {
+			nameservers = append(nameservers, fields[1:]...)
+		}
+	}
+
+	glog.V(2).Infof("Nameservers to use: %v", nameservers)
+	return nameservers
+}
+
+// ReadConfig obtains the configuration defined by the user or returns the default if it does not
+// exists or if is not a well formed json object
+func (ngx *NginxManager) ReadConfig(data string) (cfg *nginxConfiguration, err error) {
+	err = json.Unmarshal([]byte(data), &cfg)
+	if err != nil {
+		glog.Errorf("Invalid json: %v", err)
+		cfg = &nginxConfiguration{}
+		err = fmt.Errorf("Invalid custom nginx configuration: %v", err)
+		return
+	}
+
+	cfg = newDefaultNginxCfg()
+	err = fmt.Errorf("No custom nginx configuration. Using defaults")
+	return
+}
+
+func merge(dst, src map[string]interface{}) map[string]interface{} {
+	for key, srcVal := range src {
+		if dstVal, ok := dst[key]; ok {
+			srcMap, srcMapOk := toMap(srcVal)
+			dstMap, dstMapOk := toMap(dstVal)
+			if srcMapOk && dstMapOk {
+				srcVal = merge(dstMap, srcMap)
+			}
+		}
+		dst[key] = srcVal
+	}
+
+	return dst
+}
+
+func toMap(iface interface{}) (map[string]interface{}, bool) {
+	value := reflect.ValueOf(iface)
+	if value.Kind() == reflect.Map {
+		m := map[string]interface{}{}
+		for _, k := range value.MapKeys() {
+			m[k.String()] = value.MapIndex(k).Interface()
+		}
+
+		return m, true
+	}
+
+	return map[string]interface{}{}, false
+}