Documentation
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Overview ¶
Package clientcmd provides one stop shopping for building a working client from a fixed config, from a .kubeconfig file, from command line flags, or from any merged combination.
Sample usage from merged .kubeconfig files (local directory, home directory)
loadingRules := clientcmd.NewKubeConfigLoadingRules() // if you want to change the loading rules (which files in which order), you can do so here configOverrides := &clientcmd.ConfigOverrides{} // if you want to change override values or bind them to flags, there are methods to help you kubeConfig := clientcmd.NewNonInteractiveDeferredLoadingKubeConfig(loadingRules, configOverrides) kubeConfig.Client()
Index ¶
- Constants
- Variables
- func BindAuthInfoFlags(authInfo *clientcmdapi.AuthInfo, flags *pflag.FlagSet, ...)
- func BindClusterFlags(clusterInfo *clientcmdapi.Cluster, flags *pflag.FlagSet, ...)
- func BindContextFlags(contextInfo *clientcmdapi.Context, flags *pflag.FlagSet, ...)
- func BindOverrideFlags(overrides *ConfigOverrides, flags *pflag.FlagSet, ...)
- func ConfirmUsable(config clientcmdapi.Config, passedContextName string) error
- func IsContextNotFound(err error) bool
- func Load(data []byte) (*clientcmdapi.Config, error)
- func LoadFromFile(filename string) (*clientcmdapi.Config, error)
- func Validate(config clientcmdapi.Config) error
- func Write(config clientcmdapi.Config) ([]byte, error)
- func WriteToFile(config clientcmdapi.Config, filename string) error
- type AuthLoader
- type AuthOverrideFlags
- type ClientConfig
- func NewDefaultClientConfig(config clientcmdapi.Config, overrides *ConfigOverrides) ClientConfig
- func NewInteractiveClientConfig(config clientcmdapi.Config, contextName string, overrides *ConfigOverrides, ...) ClientConfig
- func NewInteractiveDeferredLoadingClientConfig(loadingRules *ClientConfigLoadingRules, overrides *ConfigOverrides, ...) ClientConfig
- func NewNonInteractiveClientConfig(config clientcmdapi.Config, contextName string, overrides *ConfigOverrides) ClientConfig
- func NewNonInteractiveDeferredLoadingClientConfig(loadingRules *ClientConfigLoadingRules, overrides *ConfigOverrides) ClientConfig
- type ClientConfigLoadingRules
- type ClusterOverrideFlags
- type ConfigOverrideFlags
- type ConfigOverrides
- type ContextOverrideFlags
- type DeferredLoadingClientConfig
- type DirectClientConfig
- type PromptingAuthLoader
Constants ¶
const ( RecommendedConfigPathFlag = "kubeconfig" RecommendedConfigPathEnvVar = "KUBECONFIG" )
const ( FlagClusterName = "cluster" FlagAuthInfoName = "user" FlagContext = "context" FlagNamespace = "namespace" FlagAPIServer = "server" FlagAPIVersion = "api-version" FlagAuthPath = "auth-path" FlagInsecure = "insecure-skip-tls-verify" FlagCertFile = "client-certificate" FlagKeyFile = "client-key" FlagCAFile = "certificate-authority" FlagBearerToken = "token" FlagUsername = "username" FlagPassword = "password" )
Variables ¶
var ( // DefaultCluster is the cluster config used when no other config is specified // TODO: eventually apiserver should start on 443 and be secure by default DefaultCluster = clientcmdapi.Cluster{Server: "http://localhost:8080"} // EnvVarCluster allows overriding the DefaultCluster using an envvar for the server name EnvVarCluster = clientcmdapi.Cluster{Server: os.Getenv("KUBERNETES_MASTER")} )
var ErrNoContext = errors.New("no context chosen")
Functions ¶
func BindAuthInfoFlags ¶
func BindAuthInfoFlags(authInfo *clientcmdapi.AuthInfo, flags *pflag.FlagSet, flagNames AuthOverrideFlags)
BindAuthInfoFlags is a convenience method to bind the specified flags to their associated variables
func BindClusterFlags ¶
func BindClusterFlags(clusterInfo *clientcmdapi.Cluster, flags *pflag.FlagSet, flagNames ClusterOverrideFlags)
BindClusterFlags is a convenience method to bind the specified flags to their associated variables
func BindContextFlags ¶
func BindContextFlags(contextInfo *clientcmdapi.Context, flags *pflag.FlagSet, flagNames ContextOverrideFlags)
BindFlags is a convenience method to bind the specified flags to their associated variables
func BindOverrideFlags ¶
func BindOverrideFlags(overrides *ConfigOverrides, flags *pflag.FlagSet, flagNames ConfigOverrideFlags)
BindOverrideFlags is a convenience method to bind the specified flags to their associated variables
func ConfirmUsable ¶
func ConfirmUsable(config clientcmdapi.Config, passedContextName string) error
ConfirmUsable looks a particular context and determines if that particular part of the config is useable. There might still be errors in the config, but no errors in the sections requested or referenced. It does not return early so that it can find as many errors as possible.
func IsContextNotFound ¶
IsContextNotFound returns a boolean indicating whether the error is known to report that a context was not found
func Load ¶
func Load(data []byte) (*clientcmdapi.Config, error)
Load takes a byte slice and deserializes the contents into Config object. Encapsulates deserialization without assuming the source is a file.
func LoadFromFile ¶
func LoadFromFile(filename string) (*clientcmdapi.Config, error)
LoadFromFile takes a filename and deserializes the contents into Config object
func Validate ¶
func Validate(config clientcmdapi.Config) error
Validate checks for errors in the Config. It does not return early so that it can find as many errors as possible.
func Write ¶
func Write(config clientcmdapi.Config) ([]byte, error)
Write serializes the config to yaml. Encapsulates serialization without assuming the destination is a file.
func WriteToFile ¶
func WriteToFile(config clientcmdapi.Config, filename string) error
WriteToFile serializes the config to yaml and writes it out to a file. If not present, it creates the file with the mode 0600. If it is present it stomps the contents
Types ¶
type AuthLoader ¶
type AuthLoader interface { // LoadAuth takes a path to a config file and can then do anything it needs in order to return a valid clientauth.Info LoadAuth(path string) (*clientauth.Info, error) }
AuthLoaders are used to build clientauth.Info objects.
func NewDefaultAuthLoader ¶
func NewDefaultAuthLoader() AuthLoader
NewDefaultAuthLoader returns a default implementation of an AuthLoader that only reads from a config file
type AuthOverrideFlags ¶
type AuthOverrideFlags struct { AuthPath string AuthPathShort string ClientCertificate string ClientKey string Token string Username string Password string }
AuthOverrideFlags holds the flag names to be used for binding command line flags for AuthInfo objects
func RecommendedAuthOverrideFlags ¶
func RecommendedAuthOverrideFlags(prefix string) AuthOverrideFlags
RecommendedAuthOverrideFlags is a convenience method to return recommended flag names prefixed with a string of your choosing
type ClientConfig ¶
type ClientConfig interface { // RawConfig returns the merged result of all overrides RawConfig() (clientcmdapi.Config, error) // ClientConfig returns a complete client config ClientConfig() (*client.Config, error) // Namespace returns the namespace resulting from the merged result of all overrides Namespace() (string, error) }
ClientConfig is used to make it easy to get an api server client
func NewDefaultClientConfig ¶
func NewDefaultClientConfig(config clientcmdapi.Config, overrides *ConfigOverrides) ClientConfig
NewDefaultClientConfig creates a DirectClientConfig using the config.CurrentContext as the context name
func NewInteractiveClientConfig ¶
func NewInteractiveClientConfig(config clientcmdapi.Config, contextName string, overrides *ConfigOverrides, fallbackReader io.Reader) ClientConfig
NewInteractiveClientConfig creates a DirectClientConfig using the passed context name and a reader in case auth information is not provided via files or flags
func NewInteractiveDeferredLoadingClientConfig ¶
func NewInteractiveDeferredLoadingClientConfig(loadingRules *ClientConfigLoadingRules, overrides *ConfigOverrides, fallbackReader io.Reader) ClientConfig
NewInteractiveDeferredLoadingClientConfig creates a ConfigClientClientConfig using the passed context name and the fallback auth reader
func NewNonInteractiveClientConfig ¶
func NewNonInteractiveClientConfig(config clientcmdapi.Config, contextName string, overrides *ConfigOverrides) ClientConfig
NewNonInteractiveClientConfig creates a DirectClientConfig using the passed context name and does not have a fallback reader for auth information
func NewNonInteractiveDeferredLoadingClientConfig ¶
func NewNonInteractiveDeferredLoadingClientConfig(loadingRules *ClientConfigLoadingRules, overrides *ConfigOverrides) ClientConfig
NewNonInteractiveDeferredLoadingClientConfig creates a ConfigClientClientConfig using the passed context name
type ClientConfigLoadingRules ¶
type ClientConfigLoadingRules struct { CommandLinePath string EnvVarPath string CurrentDirectoryPath string HomeDirectoryPath string }
ClientConfigLoadingRules is a struct that calls our specific locations that are used for merging together a Config
func NewClientConfigLoadingRules ¶
func NewClientConfigLoadingRules() *ClientConfigLoadingRules
NewClientConfigLoadingRules returns a ClientConfigLoadingRules object with default fields filled in. You are not required to use this constructor
func (*ClientConfigLoadingRules) Load ¶
func (rules *ClientConfigLoadingRules) Load() (*clientcmdapi.Config, error)
Load takes the loading rules and merges together a Config object based on following order.
- CommandLinePath
- EnvVarPath
- CurrentDirectoryPath
- HomeDirectoryPath
A missing CommandLinePath file produces an error. Empty filenames or other missing files are ignored. Read errors or files with non-deserializable content produce errors. The first file to set a particular map key wins and map key's value is never changed. BUT, if you set a struct value that is NOT contained inside of map, the value WILL be changed. This results in some odd looking logic to merge in one direction, merge in the other, and then merge the two. It also means that if two files specify a "red-user", only values from the first file's red-user are used. Even non-conflicting entries from the second file's "red-user" are discarded. Relative paths inside of the .kubeconfig files are resolved against the .kubeconfig file's parent folder and only absolute file paths are returned.
type ClusterOverrideFlags ¶
type ClusterOverrideFlags struct { APIServer string APIServerShort string APIVersion string CertificateAuthority string InsecureSkipTLSVerify string }
ClusterOverride holds the flag names to be used for binding command line flags for Cluster objects
func RecommendedClusterOverrideFlags ¶
func RecommendedClusterOverrideFlags(prefix string) ClusterOverrideFlags
RecommendedClusterOverrideFlags is a convenience method to return recommended flag names prefixed with a string of your choosing
type ConfigOverrideFlags ¶
type ConfigOverrideFlags struct { AuthOverrideFlags AuthOverrideFlags ClusterOverrideFlags ClusterOverrideFlags ContextOverrideFlags ContextOverrideFlags CurrentContext string }
ConfigOverrideFlags holds the flag names to be used for binding command line flags. Notice that this structure tightly corresponds to ConfigOverrides
func RecommendedConfigOverrideFlags ¶
func RecommendedConfigOverrideFlags(prefix string) ConfigOverrideFlags
RecommendedConfigOverrideFlags is a convenience method to return recommended flag names prefixed with a string of your choosing
type ConfigOverrides ¶
type ConfigOverrides struct { AuthInfo clientcmdapi.AuthInfo ClusterInfo clientcmdapi.Cluster Context clientcmdapi.Context CurrentContext string }
ConfigOverrides holds values that should override whatever information is pulled from the actual Config object. You can't simply use an actual Config object, because Configs hold maps, but overrides are restricted to "at most one"
type ContextOverrideFlags ¶
type ContextOverrideFlags struct { ClusterName string AuthInfoName string Namespace string // allow the potential for shorter namespace flags for commands that tend to work across namespaces NamespaceShort string }
ContextOverrideFlags holds the flag names to be used for binding command line flags for Cluster objects
func RecommendedContextOverrideFlags ¶
func RecommendedContextOverrideFlags(prefix string) ContextOverrideFlags
RecommendedContextOverrideFlags is a convenience method to return recommended flag names prefixed with a string of your choosing
type DeferredLoadingClientConfig ¶
type DeferredLoadingClientConfig struct {
// contains filtered or unexported fields
}
DeferredLoadingClientConfig is a ClientConfig interface that is backed by a set of loading rules It is used in cases where the loading rules may change after you've instantiated them and you want to be sure that the most recent rules are used. This is useful in cases where you bind flags to loading rule parameters before the parse happens and you want your calling code to be ignorant of how the values are being mutated to avoid passing extraneous information down a call stack
func (DeferredLoadingClientConfig) ClientConfig ¶
func (config DeferredLoadingClientConfig) ClientConfig() (*client.Config, error)
ClientConfig implements ClientConfig
func (DeferredLoadingClientConfig) Namespace ¶
func (config DeferredLoadingClientConfig) Namespace() (string, error)
Namespace implements KubeConfig
func (DeferredLoadingClientConfig) RawConfig ¶
func (config DeferredLoadingClientConfig) RawConfig() (clientcmdapi.Config, error)
type DirectClientConfig ¶
type DirectClientConfig struct {
// contains filtered or unexported fields
}
DirectClientConfig is a ClientConfig interface that is backed by a clientcmdapi.Config, options overrides, and an optional fallbackReader for auth information
func (DirectClientConfig) ClientConfig ¶
func (config DirectClientConfig) ClientConfig() (*client.Config, error)
ClientConfig implements ClientConfig
func (DirectClientConfig) ConfirmUsable ¶
func (config DirectClientConfig) ConfirmUsable() error
ConfirmUsable looks a particular context and determines if that particular part of the config is useable. There might still be errors in the config, but no errors in the sections requested or referenced. It does not return early so that it can find as many errors as possible.
func (DirectClientConfig) Namespace ¶
func (config DirectClientConfig) Namespace() (string, error)
Namespace implements KubeConfig
func (DirectClientConfig) RawConfig ¶
func (config DirectClientConfig) RawConfig() (clientcmdapi.Config, error)
type PromptingAuthLoader ¶
type PromptingAuthLoader struct {
// contains filtered or unexported fields
}
func NewPromptingAuthLoader ¶
func NewPromptingAuthLoader(reader io.Reader) *PromptingAuthLoader
NewDefaultAuthLoader is an AuthLoader that parses an AuthInfo object from a file path. It prompts user and creates file if it doesn't exist.
func (*PromptingAuthLoader) LoadAuth ¶
func (a *PromptingAuthLoader) LoadAuth(path string) (*clientauth.Info, error)
LoadAuth parses an AuthInfo object from a file path. It prompts user and creates file if it doesn't exist.
func (*PromptingAuthLoader) Prompt ¶
func (a *PromptingAuthLoader) Prompt() *clientauth.Info
Prompt pulls the user and password from a reader