func writePreferences(configAccess ConfigAccess, newPrefs clientcmdapi.Preferences) error {
if startingConfig, err := configAccess.GetStartingConfig(); err != nil {
return err
} else if reflect.DeepEqual(startingConfig.Preferences, newPrefs) {
return nil
}
if configAccess.IsExplicitFile() {
file := configAccess.GetExplicitFile()
currConfig := getConfigFromFileOrDie(file)
currConfig.Preferences = newPrefs
if err := clientcmd.WriteToFile(*currConfig, file); err != nil {
return err
}
return nil
}
for _, file := range configAccess.GetLoadingPrecedence() {
currConfig := getConfigFromFileOrDie(file)
if !reflect.DeepEqual(currConfig.Preferences, newPrefs) {
currConfig.Preferences = newPrefs
if err := clientcmd.WriteToFile(*currConfig, file); err != nil {
return err
}
return nil
}
}
return errors.New("no config found to write preferences")
}
// writeCurrentContext takes three possible paths.
// If newCurrentContext is the same as the startingConfig's current context, then we exit.
// If newCurrentContext has a value, then that value is written into the default destination file.
// If newCurrentContext is empty, then we find the config file that is setting the CurrentContext and clear the value from that file
func writeCurrentContext(configAccess ConfigAccess, newCurrentContext string) error {
if startingConfig, err := configAccess.GetStartingConfig(); err != nil {
return err
} else if startingConfig.CurrentContext == newCurrentContext {
return nil
}
if configAccess.IsExplicitFile() {
file := configAccess.GetExplicitFile()
currConfig := getConfigFromFileOrDie(file)
currConfig.CurrentContext = newCurrentContext
if err := clientcmd.WriteToFile(*currConfig, file); err != nil {
return err
}
return nil
}
if len(newCurrentContext) > 0 {
destinationFile := configAccess.GetDefaultFilename()
config := getConfigFromFileOrDie(destinationFile)
config.CurrentContext = newCurrentContext
if err := clientcmd.WriteToFile(*config, destinationFile); err != nil {
return err
}
return nil
}
// we're supposed to be clearing the current context. We need to find the first spot in the chain that is setting it and clear it
for _, file := range configAccess.GetLoadingPrecedence() {
if _, err := os.Stat(file); err == nil {
currConfig := getConfigFromFileOrDie(file)
if len(currConfig.CurrentContext) > 0 {
currConfig.CurrentContext = newCurrentContext
if err := clientcmd.WriteToFile(*currConfig, file); err != nil {
return err
}
return nil
}
}
}
return errors.New("no config found to write context")
}
func (o createClusterOptions) run() error {
err := o.validate()
if err != nil {
return err
}
config, filename, err := o.pathOptions.getStartingConfig()
if err != nil {
return err
}
if config.Clusters == nil {
config.Clusters = make(map[string]clientcmdapi.Cluster)
}
cluster := o.modifyCluster(config.Clusters[o.name])
config.Clusters[o.name] = cluster
err = clientcmd.WriteToFile(*config, filename)
if err != nil {
return err
}
return nil
}
func (o setOptions) run() error {
err := o.validate()
if err != nil {
return err
}
config, filename, err := o.pathOptions.getStartingConfig()
if err != nil {
return err
}
if len(filename) == 0 {
return errors.New("cannot set property without using a specific file")
}
steps, err := newNavigationSteps(o.propertyName)
if err != nil {
return err
}
err = modifyConfig(reflect.ValueOf(config), steps, o.propertyValue, false)
if err != nil {
return err
}
err = clientcmd.WriteToFile(*config, filename)
if err != nil {
return err
}
return nil
}
// ChangeUser changes the user used by the current CLI session.
func (c *CLI) ChangeUser(name string) *CLI {
adminClientConfig, err := testutil.GetClusterAdminClientConfig(c.adminConfigPath)
if err != nil {
FatalErr(err)
}
_, _, clientConfig, err := testutil.GetClientForUser(*adminClientConfig, name)
if err != nil {
FatalErr(err)
}
kubeConfig, err := config.CreateConfig(c.Namespace(), clientConfig)
if err != nil {
FatalErr(err)
}
c.configPath = filepath.Join(c.outputDir, name+".kubeconfig")
err = clientcmd.WriteToFile(*kubeConfig, c.configPath)
if err != nil {
FatalErr(err)
}
c.username = name
fmt.Printf("INFO: configPath is now %q\n", c.configPath)
return c
}
func (o unsetOptions) run() error {
err := o.validate()
if err != nil {
return err
}
config, filename, err := o.pathOptions.getStartingConfig()
if err != nil {
return err
}
if len(filename) == 0 {
return errors.New("cannot set property without using a specific file")
}
parts := strings.Split(o.propertyName, ".")
err = modifyConfig(reflect.ValueOf(config), parts, "", true)
if err != nil {
return err
}
err = clientcmd.WriteToFile(*config, filename)
if err != nil {
return err
}
return nil
}
func writeClientConfigToKubeConfig(config kclient.Config, path string) error {
kubeConfig := &clientcmdapi.Config{
Clusters: map[string]clientcmdapi.Cluster{"myserver": {Server: config.Host, CertificateAuthority: config.CAFile, CertificateAuthorityData: config.CAData}},
AuthInfos: map[string]clientcmdapi.AuthInfo{"myuser": {Token: config.BearerToken}},
Contexts: map[string]clientcmdapi.Context{"mycontext": {Cluster: "myserver", AuthInfo: "myuser"}},
CurrentContext: "mycontext",
}
if err := os.MkdirAll(filepath.Dir(path), os.FileMode(0755)); err != nil {
return err
}
if err := clientcmd.WriteToFile(*kubeConfig, path); err != nil {
return err
}
return nil
}
func testConfigCommand(args []string, startingConfig clientcmdapi.Config) (string, clientcmdapi.Config) {
fakeKubeFile, _ := ioutil.TempFile("", "")
defer os.Remove(fakeKubeFile.Name())
clientcmd.WriteToFile(startingConfig, fakeKubeFile.Name())
argsToUse := make([]string, 0, 2+len(args))
argsToUse = append(argsToUse, "--kubeconfig="+fakeKubeFile.Name())
argsToUse = append(argsToUse, args...)
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdConfig(NewDefaultPathOptions(), buf)
cmd.SetArgs(argsToUse)
cmd.Execute()
// outBytes, _ := ioutil.ReadFile(fakeKubeFile.Name())
config := getConfigFromFileOrDie(fakeKubeFile.Name())
return buf.String(), *config
}
func (o createContextOptions) run() error {
err := o.validate()
if err != nil {
return err
}
config, filename, err := o.pathOptions.getStartingConfig()
if err != nil {
return err
}
context := o.modifyContext(config.Contexts[o.name])
config.Contexts[o.name] = context
err = clientcmd.WriteToFile(*config, filename)
if err != nil {
return err
}
return nil
}
func (o createAuthInfoOptions) run() error {
err := o.validate()
if err != nil {
return err
}
config, filename, err := o.pathOptions.getStartingConfig()
if err != nil {
return err
}
authInfo := o.authInfo()
config.AuthInfos[o.name] = authInfo
err = clientcmd.WriteToFile(*config, filename)
if err != nil {
return err
}
return nil
}
func (o useContextOptions) run() error {
err := o.validate()
if err != nil {
return err
}
config, filename, err := o.pathOptions.getStartingConfig()
if err != nil {
return err
}
if len(filename) == 0 {
return errors.New("cannot set current-context without using a specific file")
}
config.CurrentContext = o.contextName
err = clientcmd.WriteToFile(*config, filename)
if err != nil {
return err
}
return nil
}
func (o CreateKubeConfigOptions) CreateKubeConfig() (*clientcmdapi.Config, error) {
glog.V(4).Infof("creating a .kubeconfig with: %#v", o)
// read all the referenced filenames
caData, err := ioutil.ReadFile(o.APIServerCAFile)
if err != nil {
return nil, err
}
certData, err := ioutil.ReadFile(o.CertFile)
if err != nil {
return nil, err
}
keyData, err := ioutil.ReadFile(o.KeyFile)
if err != nil {
return nil, err
}
certConfig, err := crypto.GetTLSCertificateConfig(o.CertFile, o.KeyFile)
if err != nil {
return nil, err
}
// determine all the nicknames
clusterNick, err := cliconfig.GetClusterNicknameFromURL(o.APIServerURL)
if err != nil {
return nil, err
}
userNick, err := cliconfig.GetUserNicknameFromCert(clusterNick, certConfig.Certs...)
if err != nil {
return nil, err
}
contextNick, err := cliconfig.GetContextNickname(o.ContextNamespace, clusterNick, userNick)
if err != nil {
return nil, err
}
credentials := make(map[string]clientcmdapi.AuthInfo)
credentials[userNick] = clientcmdapi.AuthInfo{
ClientCertificateData: certData,
ClientKeyData: keyData,
}
clusters := make(map[string]clientcmdapi.Cluster)
clusters[clusterNick] = clientcmdapi.Cluster{
Server: o.APIServerURL,
CertificateAuthorityData: caData,
}
contexts := make(map[string]clientcmdapi.Context)
contexts[contextNick] = clientcmdapi.Context{Cluster: clusterNick, AuthInfo: userNick, Namespace: o.ContextNamespace}
createPublic := (len(o.PublicAPIServerURL) > 0) && o.APIServerURL != o.PublicAPIServerURL
if createPublic {
publicClusterNick, err := cliconfig.GetClusterNicknameFromURL(o.PublicAPIServerURL)
if err != nil {
return nil, err
}
publicContextNick, err := cliconfig.GetContextNickname(o.ContextNamespace, publicClusterNick, userNick)
if err != nil {
return nil, err
}
clusters[publicClusterNick] = clientcmdapi.Cluster{
Server: o.PublicAPIServerURL,
CertificateAuthorityData: caData,
}
contexts[publicContextNick] = clientcmdapi.Context{Cluster: publicClusterNick, AuthInfo: userNick, Namespace: o.ContextNamespace}
}
kubeConfig := &clientcmdapi.Config{
Clusters: clusters,
AuthInfos: credentials,
Contexts: contexts,
CurrentContext: contextNick,
}
glog.V(3).Infof("Generating '%s' API client config as %s\n", userNick, o.KubeConfigFile)
// Ensure the parent dir exists
if err := os.MkdirAll(filepath.Dir(o.KubeConfigFile), os.FileMode(0755)); err != nil {
return nil, err
}
if err := clientcmd.WriteToFile(*kubeConfig, o.KubeConfigFile); err != nil {
return nil, err
}
return kubeConfig, nil
}
// ModifyConfig takes a Config object, iterates through Clusters, AuthInfos, and Contexts, uses the LocationOfOrigin if specified or
// uses the default destination file to write the results into. This results in multiple file reads, but it's very easy to follow.
// Preferences and CurrentContext should always be set in the default destination file. Since we can't distinguish between empty and missing values
// (no nil strings), we're forced have separate handling for them. In the kubeconfig cases, newConfig should have at most one difference,
// that means that this code will only write into a single file.
func ModifyConfig(configAccess ConfigAccess, newConfig clientcmdapi.Config) error {
startingConfig, err := configAccess.GetStartingConfig()
if err != nil {
return err
}
// We need to find all differences, locate their original files, read a partial config to modify only that stanza and write out the file.
// Special case the test for current context and preferences since those always write to the default file.
if reflect.DeepEqual(*startingConfig, newConfig) {
// nothing to do
return nil
}
if startingConfig.CurrentContext != newConfig.CurrentContext {
if err := writeCurrentContext(configAccess, newConfig.CurrentContext); err != nil {
return err
}
}
if !reflect.DeepEqual(startingConfig.Preferences, newConfig.Preferences) {
if err := writePreferences(configAccess, newConfig.Preferences); err != nil {
return err
}
}
// Search every cluster, authInfo, and context. First from new to old for differences, then from old to new for deletions
for key, cluster := range newConfig.Clusters {
startingCluster, exists := startingConfig.Clusters[key]
if !reflect.DeepEqual(cluster, startingCluster) || !exists {
destinationFile := cluster.LocationOfOrigin
if len(destinationFile) == 0 {
destinationFile = configAccess.GetDefaultFilename()
}
configToWrite := getConfigFromFileOrDie(destinationFile)
configToWrite.Clusters[key] = cluster
if err := clientcmd.WriteToFile(*configToWrite, destinationFile); err != nil {
return err
}
}
}
for key, context := range newConfig.Contexts {
startingContext, exists := startingConfig.Contexts[key]
if !reflect.DeepEqual(context, startingContext) || !exists {
destinationFile := context.LocationOfOrigin
if len(destinationFile) == 0 {
destinationFile = configAccess.GetDefaultFilename()
}
configToWrite := getConfigFromFileOrDie(destinationFile)
configToWrite.Contexts[key] = context
if err := clientcmd.WriteToFile(*configToWrite, destinationFile); err != nil {
return err
}
}
}
for key, authInfo := range newConfig.AuthInfos {
startingAuthInfo, exists := startingConfig.AuthInfos[key]
if !reflect.DeepEqual(authInfo, startingAuthInfo) || !exists {
destinationFile := authInfo.LocationOfOrigin
if len(destinationFile) == 0 {
destinationFile = configAccess.GetDefaultFilename()
}
configToWrite := getConfigFromFileOrDie(destinationFile)
configToWrite.AuthInfos[key] = authInfo
if err := clientcmd.WriteToFile(*configToWrite, destinationFile); err != nil {
return err
}
}
}
for key, cluster := range startingConfig.Clusters {
if _, exists := newConfig.Clusters[key]; !exists {
destinationFile := cluster.LocationOfOrigin
if len(destinationFile) == 0 {
destinationFile = configAccess.GetDefaultFilename()
}
configToWrite := getConfigFromFileOrDie(destinationFile)
delete(configToWrite.Clusters, key)
if err := clientcmd.WriteToFile(*configToWrite, destinationFile); err != nil {
return err
}
}
}
for key, context := range startingConfig.Contexts {
if _, exists := newConfig.Contexts[key]; !exists {
destinationFile := context.LocationOfOrigin
if len(destinationFile) == 0 {
destinationFile = configAccess.GetDefaultFilename()
}
configToWrite := getConfigFromFileOrDie(destinationFile)
delete(configToWrite.Contexts, key)
if err := clientcmd.WriteToFile(*configToWrite, destinationFile); err != nil {
return err
}
}
}
for key, authInfo := range startingConfig.AuthInfos {
if _, exists := newConfig.AuthInfos[key]; !exists {
destinationFile := authInfo.LocationOfOrigin
if len(destinationFile) == 0 {
destinationFile = configAccess.GetDefaultFilename()
}
configToWrite := getConfigFromFileOrDie(destinationFile)
delete(configToWrite.AuthInfos, key)
if err := clientcmd.WriteToFile(*configToWrite, destinationFile); err != nil {
return err
}
}
}
return nil
}