util

package
v0.0.0-...-9d9bbfe Latest Latest
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 Go to latest Published: Apr 21, 2016 License: Apache-2.0, Apache-2.0 Imports: 41 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	RunV1GeneratorName                          = "run/v1"
	RunPodV1GeneratorName                       = "run-pod/v1"
	ServiceV1GeneratorName                      = "service/v1"
	ServiceV2GeneratorName                      = "service/v2"
	HorizontalPodAutoscalerV1Beta1GeneratorName = "horizontalpodautoscaler/v1beta1"
	DeploymentV1Beta1GeneratorName              = "deployment/v1beta1"
	JobV1Beta1GeneratorName                     = "job/v1beta1"
	NamespaceV1GeneratorName                    = "namespace/v1"
	SecretV1GeneratorName                       = "secret/v1"
	SecretForDockerRegistryV1GeneratorName      = "secret-for-docker-registry/v1"
	ConfigMapV1GeneratorName                    = "configmap/v1"
)
View Source 
const (
	ApplyAnnotationsFlag = "save-config"
)
View Source 
const (
	FlagMatchBinaryVersion = "match-server-version"
)

Variables

This section is empty.

Functions

func AddApplyAnnotationFlags 

func AddApplyAnnotationFlags(cmd *cobra.Command)

func AddGeneratorFlags 

func AddGeneratorFlags(cmd *cobra.Command, defaultGenerator string)

AddGeneratorFlags adds flags common to resource generation commands TODO: need to take a pass at other generator commands to use this set of flags

func AddOutputFlagsForMutation 

func AddOutputFlagsForMutation(cmd *cobra.Command)

AddOutputFlagsForMutation adds output related flags to a command. Used by mutations only.

func AddPrinterFlags 

func AddPrinterFlags(cmd *cobra.Command)

AddPrinterFlags adds printing related flags to a command (e.g. output format, no headers, template path)

func AddRecordFlag 

func AddRecordFlag(cmd *cobra.Command)

AddCmdRecordFlag adds --record flag to command

func AddSourceToErr 

func AddSourceToErr(verb string, source string, err error) error

AddSourceToErr adds handleResourcePrefix and source string to error message. verb is the string like "creating", "deleting" etc. souce is the filename or URL to the template file(*.json or *.yaml), or stdin to use to handle the resource.

func AddValidateFlags 

func AddValidateFlags(cmd *cobra.Command)

func BehaviorOnFatal 

func BehaviorOnFatal(f func(string))

BehaviorOnFatal allows you to override the default behavior when a fatal error occurs, which is call os.Exit(1). You can pass 'panic' as a function here if you prefer the panic() over os.Exit(1).

func ChangeResourcePatch 

func ChangeResourcePatch(info *resource.Info, changeCause string) ([]byte, error)

ChangeResourcePatch creates a strategic merge patch between the origin input resource info and the annotated with change-cause input resource info.

func CheckErr 

func CheckErr(err error)

CheckErr prints a user friendly error to STDERR and exits with a non-zero exit code. Unrecognized errors will be printed with an "error: " prefix.

This method is generic to the command in use and may be used by non-Kubectl commands.

func ContainsChangeCause 

func ContainsChangeCause(info *resource.Info) bool

containsChangeCause checks if input resource info contains change-cause annotation.

func DefaultBehaviorOnFatal 

func DefaultBehaviorOnFatal()

DefaultBehaviorOnFatal allows you to undo any previous override. Useful in tests.

func DefaultClientConfig 

func DefaultClientConfig(flags *pflag.FlagSet) clientcmd.ClientConfig

DefaultClientConfig creates a clientcmd.ClientConfig with the following hierarchy:

  1. Use the kubeconfig builder. The number of merges and overrides here gets a little crazy. Stay with me.

  2. Merge together the kubeconfig itself. This is done with the following hierarchy rules:

  3. CommandLineLocation - this parsed from the command line, so it must be late bound. If you specify this, then no other kubeconfig files are merged. This file must exist.

  4. If $KUBECONFIG is set, then it is treated as a list of files that should be merged.

  5. HomeDirectoryLocation Empty filenames are ignored. Files with non-deserializable content produced errors. The first file to set a particular value or map key wins and the value or map key is never changed. This means that the first file to set CurrentContext will have its context preserved. 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.

  6. Determine the context to use based on the first hit in this chain

  7. command line argument - again, parsed from the command line, so it must be late bound

  8. CurrentContext from the merged kubeconfig file

  9. Empty is allowed at this stage

  10. Determine the cluster info and auth info to use. At this point, we may or may not have a context. They are built based on the first hit in this chain. (run it twice, once for auth, once for cluster)

  11. command line argument

  12. If context is present, then use the context value

  13. Empty is allowed

  14. Determine the actual cluster info to use. At this point, we may or may not have a cluster info. Build each piece of the cluster info based on the chain:

  15. command line argument

  16. If cluster info is present and a value for the attribute is present, use it.

  17. If you don't have a server location, bail.

  18. Auth info is build using the same rules as cluster info, EXCEPT that you can only have one authentication technique per auth info. The following conditions result in an error:

  19. If there are two conflicting techniques specified from the command line, fail.

  20. If the command line does not specify one, and the auth info has conflicting techniques, fail.

  21. If the command line specifies one and the auth info specifies another, honor the command line technique.

  22. Use default values and potentially prompt for auth information

    However, if it appears that we're running in a kubernetes cluster container environment, then run with the auth info kubernetes mounted for us. Specifically: The env vars KUBERNETES_SERVICE_HOST and KUBERNETES_SERVICE_PORT are set, and the file /var/run/secrets/kubernetes.io/serviceaccount/token exists and is not a directory.

func DefaultGenerators 

func DefaultGenerators(cmdName string) map[string]kubectl.Generator

DefaultGenerators returns the set of default generators for use in Factory instances

func DumpReaderToFile 

func DumpReaderToFile(reader io.Reader, filename string) error

DumpReaderToFile writes all data from the given io.Reader to the specified file (usually for temporary use).

func GetFirstPod 

func GetFirstPod(client *client.Client, namespace string, selector labels.Selector) (*api.Pod, error)

GetFirstPod returns the first pod of an object from its namespace and selector

func GetFlagBool 

func GetFlagBool(cmd *cobra.Command, flag string) bool

func GetFlagDuration 

func GetFlagDuration(cmd *cobra.Command, flag string) time.Duration

func GetFlagInt 

func GetFlagInt(cmd *cobra.Command, flag string) int

Assumes the flag has a default value.

func GetFlagInt64 

func GetFlagInt64(cmd *cobra.Command, flag string) int64

Assumes the flag has a default value.

func GetFlagString 

func GetFlagString(cmd *cobra.Command, flag string) string

func GetFlagStringSlice 

func GetFlagStringSlice(cmd *cobra.Command, flag string) []string

GetFlagStringList can be used to accept multiple argument with flag repetition (e.g. -f arg1 -f arg2 ...)

func GetRecordFlag 

func GetRecordFlag(cmd *cobra.Command) bool

func GetWideFlag 

func GetWideFlag(cmd *cobra.Command) bool

GetWideFlag is used to determine if "-o wide" is used

func Merge 

func Merge(codec runtime.Codec, dst runtime.Object, fragment, kind string) (runtime.Object, error)

Merge requires JSON serialization TODO: merge assumes JSON serialization, and does not properly abstract API retrieval

func MultilineError 

func MultilineError(prefix string, err error) string

MultilineError returns a string representing an error that splits sub errors into their own lines. The returned string will end with a newline.

func MultipleErrors 

func MultipleErrors(prefix string, errs []error) string

MultipleErrors returns a newline delimited string containing the prefix and referenced errors in standard form.

func OutputVersion 

func OutputVersion(cmd *cobra.Command, defaultVersion *unversioned.GroupVersion) (unversioned.GroupVersion, error)

OutputVersion returns the preferred output version for generic content (JSON, YAML, or templates) defaultVersion is never mutated. Nil simply allows clean passing in common usage from client.Config

func PrintSuccess 

func PrintSuccess(mapper meta.RESTMapper, shortOutput bool, out io.Writer, resource string, name string, operation string)

PrintSuccess prints message after finishing mutating operations

func PrinterForCommand 

func PrinterForCommand(cmd *cobra.Command) (kubectl.ResourcePrinter, bool, error)

PrinterForCommand returns the default printer for this command. Requires that printer flags have been added to cmd (see AddPrinterFlags).

func ReadConfigData 

func ReadConfigData(location string) ([]byte, error)

ReadConfigData reads the bytes from the specified filesystem or network location or from stdin if location == "-". TODO: replace with resource.Builder

func ReadConfigDataFromLocation 

func ReadConfigDataFromLocation(location string) ([]byte, error)

TODO: replace with resource.Builder

func ReadConfigDataFromReader 

func ReadConfigDataFromReader(reader io.Reader, source string) ([]byte, error)

func RecordChangeCause 

func RecordChangeCause(obj runtime.Object, changeCause string) error

RecordChangeCause annotate change-cause to input runtime object.

func ShouldRecord 

func ShouldRecord(cmd *cobra.Command, info *resource.Info) bool

ShouldRecord checks if we should record current change cause

func StandardErrorMessage 

func StandardErrorMessage(err error) (string, bool)

StandardErrorMessage translates common errors into a human readable message, or returns false if the error is not one of the recognized types. It may also log extended information to glog.

This method is generic to the command in use and may be used by non-Kubectl commands.

func UpdateObject 

func UpdateObject(info *resource.Info, codec runtime.Codec, updateFn func(runtime.Object) error) (runtime.Object, error)

UpdateObject updates resource object with updateFn

func UsageError 

func UsageError(cmd *cobra.Command, format string, args ...interface{}) error

func ValidateOutputArgs 

func ValidateOutputArgs(cmd *cobra.Command) error

ValidateOutputArgs validates -o flag args for mutations

Types

type ClientCache 

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

ClientCache caches previously loaded clients for reuse, and ensures MatchServerVersion is invoked only once

func NewClientCache 

func NewClientCache(loader clientcmd.ClientConfig) *ClientCache

func (*ClientCache) ClientConfigForVersion 

func (c *ClientCache) ClientConfigForVersion(version *unversioned.GroupVersion) (*client.Config, error)

ClientConfigForVersion returns the correct config for a server

func (*ClientCache) ClientForVersion 

func (c *ClientCache) ClientForVersion(version *unversioned.GroupVersion) (*client.Client, error)

ClientForVersion initializes or reuses a client for the specified version, or returns an error if that is not possible

type Factory 

type Factory struct {

	// Returns interfaces for dealing with arbitrary runtime.Objects.
	Object func() (meta.RESTMapper, runtime.ObjectTyper)
	// Returns interfaces for decoding objects - if toInternal is set, decoded objects will be converted
	// into their internal form (if possible). Eventually the internal form will be removed as an option,
	// and only versioned objects will be returned.
	Decoder func(toInternal bool) runtime.Decoder
	// Returns an encoder capable of encoding a provided object into JSON in the default desired version.
	JSONEncoder func() runtime.Encoder
	// Returns a client for accessing Kubernetes resources or an error.
	Client func() (*client.Client, error)
	// Returns a client.Config for accessing the Kubernetes server.
	ClientConfig func() (*client.Config, error)
	// Returns a RESTClient for working with the specified RESTMapping or an error. This is intended
	// for working with arbitrary resources and is not guaranteed to point to a Kubernetes APIServer.
	ClientForMapping func(mapping *meta.RESTMapping) (resource.RESTClient, error)
	// Returns a Describer for displaying the specified RESTMapping type or an error.
	Describer func(mapping *meta.RESTMapping) (kubectl.Describer, error)
	// Returns a Printer for formatting objects of the given type or an error.
	Printer func(mapping *meta.RESTMapping, noHeaders, withNamespace bool, wide bool, showAll bool, showLabels bool, absoluteTimestamps bool, columnLabels []string) (kubectl.ResourcePrinter, error)
	// Returns a Scaler for changing the size of the specified RESTMapping type or an error
	Scaler func(mapping *meta.RESTMapping) (kubectl.Scaler, error)
	// Returns a Reaper for gracefully shutting down resources.
	Reaper func(mapping *meta.RESTMapping) (kubectl.Reaper, error)
	// Returns a HistoryViewer for viewing change history
	HistoryViewer func(mapping *meta.RESTMapping) (kubectl.HistoryViewer, error)
	// Returns a Rollbacker for changing the rollback version of the specified RESTMapping type or an error
	Rollbacker func(mapping *meta.RESTMapping) (kubectl.Rollbacker, error)
	// PodSelectorForObject returns the pod selector associated with the provided object
	PodSelectorForObject func(object runtime.Object) (string, error)
	// MapBasedSelectorForObject returns the map-based selector associated with the provided object. If a
	// new set-based selector is provided, an error is returned if the selector cannot be converted to a
	// map-based selector
	MapBasedSelectorForObject func(object runtime.Object) (string, error)
	// PortsForObject returns the ports associated with the provided object
	PortsForObject func(object runtime.Object) ([]string, error)
	// LabelsForObject returns the labels associated with the provided object
	LabelsForObject func(object runtime.Object) (map[string]string, error)
	// LogsForObject returns a request for the logs associated with the provided object
	LogsForObject func(object, options runtime.Object) (*client.Request, error)
	// PauseObject marks the provided object as paused ie. it will not be reconciled by its controller.
	PauseObject func(object runtime.Object) (bool, error)
	// ResumeObject resumes a paused object ie. it will be reconciled by its controller.
	ResumeObject func(object runtime.Object) (bool, error)
	// Returns a schema that can validate objects stored on disk.
	Validator func(validate bool, cacheDir string) (validation.Schema, error)
	// SwaggerSchema returns the schema declaration for the provided group version kind.
	SwaggerSchema func(unversioned.GroupVersionKind) (*swagger.ApiDeclaration, error)
	// Returns the default namespace to use in cases where no
	// other namespace is specified and whether the namespace was
	// overriden.
	DefaultNamespace func() (string, bool, error)
	// Generators returns the generators for the provided command
	Generators func(cmdName string) map[string]kubectl.Generator
	// Check whether the kind of resources could be exposed
	CanBeExposed func(kind unversioned.GroupKind) error
	// Check whether the kind of resources could be autoscaled
	CanBeAutoscaled func(kind unversioned.GroupKind) error
	// AttachablePodForObject returns the pod to which to attach given an object.
	AttachablePodForObject func(object runtime.Object) (*api.Pod, error)
	// EditorEnvs returns a group of environment variables that the edit command
	// can range over in order to determine if the user has specified an editor
	// of their choice.
	EditorEnvs func() []string
	// contains filtered or unexported fields
}

Factory provides abstractions that allow the Kubectl command to be extended across multiple types of resources and different API sets. TODO: make the functions interfaces TODO: pass the various interfaces on the factory directly into the command constructors (so the commands are decoupled from the factory).

func NewFactory 

func NewFactory(optionalClientConfig clientcmd.ClientConfig) *Factory

NewFactory creates a factory with the default Kubernetes resources defined if optionalClientConfig is nil, then flags will be bound to a new clientcmd.ClientConfig. if optionalClientConfig is not nil, then this factory will make use of it.

func (*Factory) BindFlags 

func (f *Factory) BindFlags(flags *pflag.FlagSet)

BindFlags adds any flags that are common to all kubectl sub commands.

func (*Factory) Command 

func (f *Factory) Command() string

Command will stringify and return all environment arguments ie. a command run by a client using the factory. TODO: We need to filter out stuff like secrets.

func (*Factory) NewBuilder 

func (f *Factory) NewBuilder() *resource.Builder

One stop shopping for a Builder

func (*Factory) PrintObject 

func (f *Factory) PrintObject(cmd *cobra.Command, obj runtime.Object, out io.Writer) error

PrintObject prints an api object given command line flags to modify the output format

func (*Factory) PrinterForMapping 

func (f *Factory) PrinterForMapping(cmd *cobra.Command, mapping *meta.RESTMapping, withNamespace bool) (kubectl.ResourcePrinter, error)

PrinterForMapping returns a printer suitable for displaying the provided resource type. Requires that printer flags have been added to cmd (see AddPrinterFlags).

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