util

Documentation

Index

• Constants
• func BuildArgumentListFromMap(baseArguments map[string]string, overrideArguments map[string]string) []string
• func CheckErr(err error)
• func CopyDir(src string, dst string) error
• func FormatErrMsg(errs []error) string
• func GetCgroupDriverDocker(execer utilsexec.Interface) (string, error)
• func GetMasterEndpoint(api *kubeadmapi.API) (string, error)
• func GroupVersionKindFromBytes(buffer []byte, codecs serializer.CodecFactory) (schema.GroupVersionKind, error)
• func KubernetesIsCIVersion(version string) bool
• func KubernetesReleaseVersion(version string) (string, error)
• func KubernetesVersionToImageTag(version string) string
• func LoadYAML(bytes []byte) (map[string]interface{}, error)
• func MarshalToYaml(obj runtime.Object, gv schema.GroupVersion) ([]byte, error)
• func MarshalToYamlForCodecs(obj runtime.Object, gv schema.GroupVersion, codecs serializer.CodecFactory) ([]byte, error)
• func ParseArgumentListToMap(arguments []string) map[string]string
• func ParseHostPort(hostport string) (string, string, error)
• func ParseTemplate(strtmpl string, obj interface{}) ([]byte, error)
• func ReplaceArgument(command []string, argMutateFunc func(map[string]string) map[string]string) []string
• func UnmarshalFromYaml(buffer []byte, gv schema.GroupVersion) (runtime.Object, error)
• func UnmarshalFromYamlForCodecs(buffer []byte, gv schema.GroupVersion, codecs serializer.CodecFactory) (runtime.Object, error)

Constants

const (
	// DefaultErrorExitCode defines exit the code for failed action generally
	DefaultErrorExitCode = 1
	// PreFlightExitCode defines exit the code for preflight checks
	PreFlightExitCode = 2
	// ValidationExitCode defines the exit code validation checks
	ValidationExitCode = 3
)

Functions

func BuildArgumentListFromMap

func BuildArgumentListFromMap(baseArguments map[string]string, overrideArguments map[string]string) []string

BuildArgumentListFromMap takes two string-string maps, one with the base arguments and one with optional override arguments. In the return list override arguments will precede base arguments

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 CopyDir

func CopyDir(src string, dst string) error

CopyDir copies the content of a folder

func FormatErrMsg

func FormatErrMsg(errs []error) string

FormatErrMsg returns a human-readable string describing the slice of errors passed to the function

func GetCgroupDriverDocker

func GetCgroupDriverDocker(execer utilsexec.Interface) (string, error)

GetCgroupDriverDocker runs 'docker info' to obtain the docker cgroup driver

func GetMasterEndpoint

func GetMasterEndpoint(api *kubeadmapi.API) (string, error)

GetMasterEndpoint returns a properly formatted endpoint for the control plane built according following rules: - If the api.ControlPlaneEndpoint is defined, use it. - if the api.ControlPlaneEndpoint is defined but without a port number, use the api.ControlPlaneEndpoint + api.BindPort is used. - Otherwise, in case the api.ControlPlaneEndpoint is not defined, use the api.AdvertiseAddress + the api.BindPort.

func GroupVersionKindFromBytes

func GroupVersionKindFromBytes(buffer []byte, codecs serializer.CodecFactory) (schema.GroupVersionKind, error)

GroupVersionKindFromBytes parses the bytes and returns the gvk

func KubernetesIsCIVersion

func KubernetesIsCIVersion(version string) bool

KubernetesIsCIVersion checks if user requested CI version

func KubernetesReleaseVersion

func KubernetesReleaseVersion(version string) (string, error)

KubernetesReleaseVersion is helper function that can fetch available version information from release servers based on label names, like "stable" or "latest".

If argument is already semantic version string, it will return same string.

In case of labels, it tries to fetch from release servers and then return actual semantic version.

Available names on release servers:

stable      (latest stable release)
stable-1    (latest stable release in 1.x)
stable-1.0  (and similarly 1.1, 1.2, 1.3, ...)
latest      (latest release, including alpha/beta)
latest-1    (latest release in 1.x, including alpha/beta)
latest-1.0  (and similarly 1.1, 1.2, 1.3, ...)

func KubernetesVersionToImageTag

func KubernetesVersionToImageTag(version string) string

KubernetesVersionToImageTag is helper function that replaces all non-allowed symbols in tag strings with underscores. Image tag can only contain lowercase and uppercase letters, digits, underscores, periods and dashes. Current usage is for CI images where all of symbols except '+' are valid, but function is for generic usage where input can't be always pre-validated.

func LoadYAML

func LoadYAML(bytes []byte) (map[string]interface{}, error)

LoadYAML is a small wrapper around go-yaml that ensures all nested structs are map[string]interface{} instead of map[interface{}]interface{}.

func MarshalToYaml

func MarshalToYaml(obj runtime.Object, gv schema.GroupVersion) ([]byte, error)

MarshalToYaml marshals an object into yaml.

func MarshalToYamlForCodecs

func MarshalToYamlForCodecs(obj runtime.Object, gv schema.GroupVersion, codecs serializer.CodecFactory) ([]byte, error)

MarshalToYamlForCodecs marshals an object into yaml using the specified codec TODO: Is specifying the gv really needed here? TODO: Can we support json out of the box easily here?

func ParseArgumentListToMap

func ParseArgumentListToMap(arguments []string) map[string]string

ParseArgumentListToMap parses a CLI argument list in the form "--foo=bar" to a string-string map

func ParseHostPort

func ParseHostPort(hostport string) (string, string, error)

ParseHostPort parses a network address of the form "host:port", "ipv4:port", "[ipv6]:port" into host and port; ":port" can be eventually omitted. If the string is not a valid representation of network address, ParseHostPort returns an error.

func ParseTemplate

func ParseTemplate(strtmpl string, obj interface{}) ([]byte, error)

ParseTemplate validates and parses passed as argument template

func ReplaceArgument

func ReplaceArgument(command []string, argMutateFunc func(map[string]string) map[string]string) []string

ReplaceArgument gets a command list; converts it to a map for easier modification, runs the provided function that returns a new modified map, and then converts the map back to a command string slice

func UnmarshalFromYaml

func UnmarshalFromYaml(buffer []byte, gv schema.GroupVersion) (runtime.Object, error)

UnmarshalFromYaml unmarshals yaml into an object.

func UnmarshalFromYamlForCodecs

func UnmarshalFromYamlForCodecs(buffer []byte, gv schema.GroupVersion, codecs serializer.CodecFactory) (runtime.Object, error)

UnmarshalFromYamlForCodecs unmarshals yaml into an object using the specified codec TODO: Is specifying the gv really needed here? TODO: Can we support json out of the box easily here?