clientcmd

package
v1.2.0 Latest Latest
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 Go to latest Published: Mar 16, 2016 License: Apache-2.0 Imports: 25 Imported by: 0

Documentation

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.NewDefaultClientConfigLoadingRules()
// 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.NewNonInteractiveDeferredLoadingClientConfig(loadingRules, configOverrides)
config, err := kubeConfig.ClientConfig()
if err != nil {
	// Do something
}
client, err := unversioned.New(config)
// ...

Index

Constants

View Source 
const (
	RecommendedConfigPathFlag   = "kubeconfig"
	RecommendedConfigPathEnvVar = "KUBECONFIG"
	RecommendedHomeDir          = ".kube"
	RecommendedFileName         = "config"
	RecommendedSchemaName       = "schema"
)
View Source 
const (
	FlagClusterName  = "cluster"
	FlagAuthInfoName = "user"
	FlagContext      = "context"
	FlagNamespace    = "namespace"
	FlagAPIServer    = "server"
	FlagAPIVersion   = "api-version"
	FlagInsecure     = "insecure-skip-tls-verify"
	FlagCertFile     = "client-certificate"
	FlagKeyFile      = "client-key"
	FlagCAFile       = "certificate-authority"
	FlagEmbedCerts   = "embed-certs"
	FlagBearerToken  = "token"
	FlagUsername     = "username"
	FlagPassword     = "password"
)

Variables

View Source 
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")}

	DefaultClientConfig = DirectClientConfig{*clientcmdapi.NewConfig(), "", &ConfigOverrides{}, nil}
)
View Source 
var (
	ErrNoContext   = errors.New("no context chosen")
	ErrEmptyConfig = errors.New("no configuration has been provided")
	// message is for consistency with old behavior
	ErrEmptyCluster = errors.New("cluster has no server defined")
)
View Source 
var OldRecommendedHomeFile = path.Join(os.Getenv("HOME"), "/.kube/.kubeconfig")
View Source 
var RecommendedHomeFile = path.Join(os.Getenv("HOME"), RecommendedHomeDir, RecommendedFileName)
View Source 
var RecommendedSchemaFile = path.Join(os.Getenv("HOME"), RecommendedHomeDir, RecommendedSchemaName)

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 BuildConfigFromFlags added in v1.2.0 

func BuildConfigFromFlags(masterUrl, kubeconfigPath string) (*restclient.Config, error)

BuildConfigFromFlags is a helper function that builds configs from a master url or a kubeconfig filepath. These are passed in as command line flags for cluster components. Warnings should reflect this usage. If neither masterUrl or kubeconfigPath are passed in we fallback to inClusterConfig. If inClusterConfig fails, we fallback to the default config.

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 GetAuthInfoFileReferences 

func GetAuthInfoFileReferences(authInfo *clientcmdapi.AuthInfo) []*string

func GetClusterFileReferences 

func GetClusterFileReferences(cluster *clientcmdapi.Cluster) []*string

func GetConfigFileReferences 

func GetConfigFileReferences(config *clientcmdapi.Config) []*string

func IsConfigurationInvalid 

func IsConfigurationInvalid(err error) bool

IsConfigurationInvalid returns true if the provided error indicates the configuration is invalid.

func IsContextNotFound 

func IsContextNotFound(err error) bool

IsContextNotFound returns a boolean indicating whether the error is known to report that a context was not found

func IsEmptyConfig added in v1.2.0 

func IsEmptyConfig(err error) bool

IsEmptyConfig returns true if the provided error indicates the provided configuration is empty.

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 MakeRelative 

func MakeRelative(path, base string) (string, error)

func RelativizeAuthInfoLocalPaths 

func RelativizeAuthInfoLocalPaths(authInfo *clientcmdapi.AuthInfo) error

RelativizeAuthInfoLocalPaths first absolutizes the paths by calling ResolveLocalPaths. This assumes that any NEW path is already absolute, but any existing path will be resolved relative to LocationOfOrigin

func RelativizeClusterLocalPaths 

func RelativizeClusterLocalPaths(cluster *clientcmdapi.Cluster) error

RelativizeClusterLocalPaths first absolutizes the paths by calling ResolveLocalPaths. This assumes that any NEW path is already absolute, but any existing path will be resolved relative to LocationOfOrigin

func RelativizeConfigPaths 

func RelativizeConfigPaths(config *clientcmdapi.Config, base string) error

func RelativizePathWithNoBacksteps 

func RelativizePathWithNoBacksteps(refs []*string, base string) error

RelativizePathWithNoBacksteps updates the given refs to be relative paths, relative to the given base directory as long as they do not require backsteps. Any path requiring a backstep is left as-is as long it is absolute. Any non-absolute path that can't be relativized produces an error

func ResolveConfigPaths 

func ResolveConfigPaths(config *clientcmdapi.Config, base string) error

func ResolveLocalPaths 

func ResolveLocalPaths(config *clientcmdapi.Config) error

ResolveLocalPaths resolves all relative paths in the config object with respect to the stanza's LocationOfOrigin this cannot be done directly inside of LoadFromFile because doing so there would make it impossible to load a file without modification of its contents.

func ResolvePaths 

func ResolvePaths(refs []*string, base string) error

ResolvePaths updates the given refs to be absolute paths, relative to the given base directory

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 {
	ClientCertificate FlagInfo
	ClientKey         FlagInfo
	Token             FlagInfo
	Username          FlagInfo
	Password          FlagInfo
}

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() (*restclient.Config, error)
	// Namespace returns the namespace resulting from the merged
	// result of all overrides and a boolean indicating if it was
	// overridden
	Namespace() (string, bool, 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 {
	ExplicitPath string
	Precedence   []string

	// MigrationRules is a map of destination files to source files.  If a destination file is not present, then the source file is checked.
	// If the source file is present, then it is copied to the destination file BEFORE any further loading happens.
	MigrationRules map[string]string

	// DoNotResolvePaths indicates whether or not to resolve paths with respect to the originating files.  This is phrased as a negative so
	// that a default object that doesn't set this will usually get the behavior it wants.
	DoNotResolvePaths bool
}

ClientConfigLoadingRules is an ExplicitPath and string slice of specific locations that are used for merging together a Config Callers can put the chain together however they want, but we'd recommend: EnvVarPathFiles if set (a list of files if set) OR the HomeDirectoryPath ExplicitPath is special, because if a user specifically requests a certain file be used and error is reported if thie file is not present

func NewDefaultClientConfigLoadingRules 

func NewDefaultClientConfigLoadingRules() *ClientConfigLoadingRules

NewDefaultClientConfigLoadingRules 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 starts by running the MigrationRules and then takes the loading rules and returns a Config object based on following rules. 

if the ExplicitPath, return the unmerged explicit file
Otherwise, return a merged config based on the Precedence slice

A missing ExplicitPath 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.

func (*ClientConfigLoadingRules) Migrate 

func (rules *ClientConfigLoadingRules) Migrate() error

Migrate uses the MigrationRules map. If a destination file is not present, then the source file is checked. If the source file is present, then it is copied to the destination file BEFORE any further loading happens.

func (ClientConfigLoadingRules) ResolvePaths 

func (rules ClientConfigLoadingRules) ResolvePaths() bool

type ClusterOverrideFlags 

type ClusterOverrideFlags struct {
	APIServer             FlagInfo
	APIVersion            FlagInfo
	CertificateAuthority  FlagInfo
	InsecureSkipTLSVerify FlagInfo
}

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       FlagInfo
}

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  FlagInfo
	AuthInfoName FlagInfo
	Namespace    FlagInfo
}

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() (*restclient.Config, error)

ClientConfig implements ClientConfig

func (*DeferredLoadingClientConfig) Namespace 

func (config *DeferredLoadingClientConfig) Namespace() (string, bool, 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() (*restclient.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, bool, error)

Namespace implements KubeConfig

func (*DirectClientConfig) RawConfig 

func (config *DirectClientConfig) RawConfig() (clientcmdapi.Config, error)

type FlagInfo 

type FlagInfo struct {
	// LongName is the long string for a flag.  If this is empty, then the flag will not be bound
	LongName string
	// ShortName is the single character for a flag.  If this is empty, then there will be no short flag
	ShortName string
	// Default is the default value for the flag
	Default string
	// Description is the description for the flag
	Description string
}

FlagInfo contains information about how to register a flag. This struct is useful if you want to provide a way for an extender to get back a set of recommended flag names, descriptions, and defaults, but allow for customization by an extender. This makes for coherent extension, without full prescription

func (FlagInfo) BindBoolFlag 

func (f FlagInfo) BindBoolFlag(flags *pflag.FlagSet, target *bool)

BindBoolFlag binds the flag based on the provided info. If LongName == "", nothing is registered

func (FlagInfo) BindStringFlag 

func (f FlagInfo) BindStringFlag(flags *pflag.FlagSet, target *string)

BindStringFlag binds the flag based on the provided info. If LongName == "", nothing is registered

type PromptingAuthLoader 

type PromptingAuthLoader struct {
	// contains filtered or unexported fields
}

func NewPromptingAuthLoader 

func NewPromptingAuthLoader(reader io.Reader) *PromptingAuthLoader

NewPromptingAuthLoader 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

Source Files

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Directories

Path Synopsis
api
latest
v1

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