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104 lines
2.8 KiB
Go
104 lines
2.8 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package options contains flags for initializing a proxy.
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package options
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import (
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"net/url"
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"os"
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"fmt"
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"github.com/spf13/pflag"
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"k8s.io/kubernetes/pkg/util/validation"
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_ "net/http/pprof"
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"strings"
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)
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type KubeDNSConfig struct {
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ClusterDomain string
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KubeConfigFile string
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KubeMasterURL string
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HealthzPort int
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}
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func NewKubeDNSConfig() *KubeDNSConfig {
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return &KubeDNSConfig{
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ClusterDomain: "cluster.local.",
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KubeConfigFile: "",
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KubeMasterURL: "",
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HealthzPort: 8081,
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}
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}
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type clusterDomainVar struct {
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val *string
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}
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func (m clusterDomainVar) Set(v string) error {
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v = strings.TrimSuffix(v, ".")
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segments := strings.Split(v, ".")
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for _, segment := range segments {
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if errs := validation.IsDNS1123Label(segment); len(errs) > 0 {
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return fmt.Errorf("Not a valid DNS label. %v", errs)
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}
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}
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if !strings.HasSuffix(v, ".") {
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v = fmt.Sprintf("%s.", v)
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}
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*m.val = v
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return nil
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}
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func (m clusterDomainVar) String() string {
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return *m.val
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}
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func (m clusterDomainVar) Type() string {
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return "string"
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}
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type kubeMasterURLVar struct {
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val *string
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}
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func (m kubeMasterURLVar) Set(v string) error {
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parsedURL, err := url.Parse(os.ExpandEnv(v))
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if err != nil {
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return fmt.Errorf("failed to parse kube-master-url")
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}
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if parsedURL.Scheme == "" || parsedURL.Host == "" || parsedURL.Host == ":" {
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return fmt.Errorf("invalid kube-master-url specified")
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}
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*m.val = v
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return nil
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}
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func (m kubeMasterURLVar) String() string {
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return *m.val
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}
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func (m kubeMasterURLVar) Type() string {
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return "string"
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}
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func (s *KubeDNSConfig) AddFlags(fs *pflag.FlagSet) {
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fs.Var(clusterDomainVar{&s.ClusterDomain}, "domain", "domain under which to create names")
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fs.StringVar(&s.KubeConfigFile, "kubecfg-file", s.KubeConfigFile, "Location of kubecfg file for access to kubernetes master service; --kube-master-url overrides the URL part of this; if neither this nor --kube-master-url are provided, defaults to service account tokens")
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fs.Var(kubeMasterURLVar{&s.KubeMasterURL}, "kube-master-url", "URL to reach kubernetes master. Env variables in this flag will be expanded.")
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fs.IntVar(&s.HealthzPort, "healthz-port", s.HealthzPort, "port on which to serve a kube-dns HTTP readiness probe.")
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}
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