ffa764d60b
This change allows the namespace in kubeconfig to be overridden by specifying the namespace in the spec file. If namespace is explicitly provided in the command line flags and the spec file has a different namespace, this will cause an error.
105 lines
3.8 KiB
Go
105 lines
3.8 KiB
Go
/*
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Copyright 2014 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 clientcmd
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import (
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"io"
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"reflect"
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"github.com/golang/glog"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
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clientcmdapi "github.com/GoogleCloudPlatform/kubernetes/pkg/client/clientcmd/api"
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)
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// DeferredLoadingClientConfig is a ClientConfig interface that is backed by a set of loading rules
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// It is used in cases where the loading rules may change after you've instantiated them and you want to be sure that
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// the most recent rules are used. This is useful in cases where you bind flags to loading rule parameters before
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// the parse happens and you want your calling code to be ignorant of how the values are being mutated to avoid
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// passing extraneous information down a call stack
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type DeferredLoadingClientConfig struct {
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loadingRules *ClientConfigLoadingRules
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overrides *ConfigOverrides
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fallbackReader io.Reader
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}
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// NewNonInteractiveDeferredLoadingClientConfig creates a ConfigClientClientConfig using the passed context name
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func NewNonInteractiveDeferredLoadingClientConfig(loadingRules *ClientConfigLoadingRules, overrides *ConfigOverrides) ClientConfig {
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return DeferredLoadingClientConfig{loadingRules, overrides, nil}
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}
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// NewInteractiveDeferredLoadingClientConfig creates a ConfigClientClientConfig using the passed context name and the fallback auth reader
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func NewInteractiveDeferredLoadingClientConfig(loadingRules *ClientConfigLoadingRules, overrides *ConfigOverrides, fallbackReader io.Reader) ClientConfig {
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return DeferredLoadingClientConfig{loadingRules, overrides, fallbackReader}
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}
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func (config DeferredLoadingClientConfig) createClientConfig() (ClientConfig, error) {
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mergedConfig, err := config.loadingRules.Load()
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if err != nil {
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return nil, err
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}
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var mergedClientConfig ClientConfig
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if config.fallbackReader != nil {
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mergedClientConfig = NewInteractiveClientConfig(*mergedConfig, config.overrides.CurrentContext, config.overrides, config.fallbackReader)
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} else {
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mergedClientConfig = NewNonInteractiveClientConfig(*mergedConfig, config.overrides.CurrentContext, config.overrides)
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}
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return mergedClientConfig, nil
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}
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func (config DeferredLoadingClientConfig) RawConfig() (clientcmdapi.Config, error) {
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mergedConfig, err := config.createClientConfig()
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if err != nil {
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return clientcmdapi.Config{}, err
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}
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return mergedConfig.RawConfig()
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}
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// ClientConfig implements ClientConfig
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func (config DeferredLoadingClientConfig) ClientConfig() (*client.Config, error) {
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mergedClientConfig, err := config.createClientConfig()
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if err != nil {
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return nil, err
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}
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mergedConfig, err := mergedClientConfig.ClientConfig()
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if err != nil {
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return nil, err
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}
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// Are we running in a cluster and were no other configs found? If so, use the in-cluster-config.
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icc := inClusterClientConfig{}
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defaultConfig, err := DefaultClientConfig.ClientConfig()
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if icc.Possible() && err == nil && reflect.DeepEqual(mergedConfig, defaultConfig) {
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glog.V(2).Info("no kubeconfig could be created, falling back to service account.")
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return icc.ClientConfig()
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}
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return mergedConfig, nil
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}
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// Namespace implements KubeConfig
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func (config DeferredLoadingClientConfig) Namespace() (string, bool, error) {
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mergedKubeConfig, err := config.createClientConfig()
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if err != nil {
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return "", false, err
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}
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return mergedKubeConfig.Namespace()
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}
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