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configs.go
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/
configs.go
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// Copyright 2014 Google Inc. 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 kubernetes
import (
"fmt"
"io/ioutil"
"net/url"
"strconv"
"k8s.io/kubernetes/pkg/api/unversioned"
kube_client "k8s.io/kubernetes/pkg/client/restclient"
kubeClientCmd "k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
kubeClientCmdApi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
)
const (
APIVersion = "v1"
defaultKubeletPort = 10255
defaultKubeletHttps = false
defaultUseServiceAccount = false
defaultServiceAccountFile = "/var/run/secrets/kubernetes.io/serviceaccount/token"
defaultInClusterConfig = true
)
func getConfigOverrides(uri *url.URL) (*kubeClientCmd.ConfigOverrides, error) {
kubeConfigOverride := kubeClientCmd.ConfigOverrides{
ClusterInfo: kubeClientCmdApi.Cluster{
APIVersion: APIVersion,
},
}
if len(uri.Scheme) != 0 && len(uri.Host) != 0 {
kubeConfigOverride.ClusterInfo.Server = fmt.Sprintf("%s://%s", uri.Scheme, uri.Host)
}
opts := uri.Query()
if len(opts["apiVersion"]) >= 1 {
kubeConfigOverride.ClusterInfo.APIVersion = opts["apiVersion"][0]
}
if len(opts["insecure"]) > 0 {
insecure, err := strconv.ParseBool(opts["insecure"][0])
if err != nil {
return nil, err
}
kubeConfigOverride.ClusterInfo.InsecureSkipTLSVerify = insecure
}
return &kubeConfigOverride, nil
}
func GetKubeClientConfig(uri *url.URL) (*kube_client.Config, error) {
var (
kubeConfig *kube_client.Config
err error
)
opts := uri.Query()
configOverrides, err := getConfigOverrides(uri)
if err != nil {
return nil, err
}
inClusterConfig := defaultInClusterConfig
if len(opts["inClusterConfig"]) > 0 {
inClusterConfig, err = strconv.ParseBool(opts["inClusterConfig"][0])
if err != nil {
return nil, err
}
}
if inClusterConfig {
kubeConfig, err = kube_client.InClusterConfig()
if err != nil {
return nil, err
}
if configOverrides.ClusterInfo.Server != "" {
kubeConfig.Host = configOverrides.ClusterInfo.Server
}
kubeConfig.GroupVersion = &unversioned.GroupVersion{Version: configOverrides.ClusterInfo.APIVersion}
kubeConfig.Insecure = configOverrides.ClusterInfo.InsecureSkipTLSVerify
if configOverrides.ClusterInfo.InsecureSkipTLSVerify {
kubeConfig.TLSClientConfig.CAFile = ""
}
} else {
authFile := ""
if len(opts["auth"]) > 0 {
authFile = opts["auth"][0]
}
if authFile != "" {
if kubeConfig, err = kubeClientCmd.NewNonInteractiveDeferredLoadingClientConfig(
&kubeClientCmd.ClientConfigLoadingRules{ExplicitPath: authFile},
configOverrides).ClientConfig(); err != nil {
return nil, err
}
} else {
kubeConfig = &kube_client.Config{
Host: configOverrides.ClusterInfo.Server,
Insecure: configOverrides.ClusterInfo.InsecureSkipTLSVerify,
}
kubeConfig.GroupVersion = &unversioned.GroupVersion{Version: configOverrides.ClusterInfo.APIVersion}
}
}
if len(kubeConfig.Host) == 0 {
return nil, fmt.Errorf("invalid kubernetes master url specified")
}
useServiceAccount := defaultUseServiceAccount
if len(opts["useServiceAccount"]) >= 1 {
useServiceAccount, err = strconv.ParseBool(opts["useServiceAccount"][0])
if err != nil {
return nil, err
}
}
if useServiceAccount {
// If a readable service account token exists, then use it
if contents, err := ioutil.ReadFile(defaultServiceAccountFile); err == nil {
kubeConfig.BearerToken = string(contents)
}
}
return kubeConfig, nil
}