v1

Documentation

Overview

The LoggingAlphaOptions and LoggingBetaOptions feature gates control whether these unstable features can get enabled. This can be used to ensure that command invocations do not accidentally rely on unstable features.

Index

• Constants
• func AddFeatureGates(mutableFeatureGate featuregate.MutableFeatureGate) error
• func AddFlags(c *LoggingConfiguration, fs *pflag.FlagSet)
• func RegisterLogFormat(name string, factory LogFormatFactory, feature featuregate.Feature) error
• func SetRecommendedLoggingConfiguration(c *LoggingConfiguration)
• func VModuleConfigurationPflag(value *VModuleConfiguration) pflag.Value
• func Validate(c *LoggingConfiguration, featureGate featuregate.FeatureGate, ...) field.ErrorList
• func ValidateAndApply(c *LoggingConfiguration, featureGate featuregate.FeatureGate) error
• func ValidateAndApplyAsField(c *LoggingConfiguration, featureGate featuregate.FeatureGate, ...) error
• func VerbosityLevelPflag(value *VerbosityLevel) pflag.Value
• type FormatOptions
  • func (in *FormatOptions) DeepCopy() *FormatOptions
  • func (in *FormatOptions) DeepCopyInto(out *FormatOptions)
• type JSONOptions
  • func (in *JSONOptions) DeepCopy() *JSONOptions
  • func (in *JSONOptions) DeepCopyInto(out *JSONOptions)
• type LogFormatFactory
• type LoggingConfiguration
  • func NewLoggingConfiguration() *LoggingConfiguration
  • func (in *LoggingConfiguration) DeepCopy() *LoggingConfiguration
  • func (in *LoggingConfiguration) DeepCopyInto(out *LoggingConfiguration)
• type VModuleConfiguration
  • func (in VModuleConfiguration) DeepCopy() VModuleConfiguration
  • func (in VModuleConfiguration) DeepCopyInto(out *VModuleConfiguration)
• type VModuleItem
  • func (in *VModuleItem) DeepCopy() *VModuleItem
  • func (in *VModuleItem) DeepCopyInto(out *VModuleItem)
• type VerbosityLevel

Constants

const (
	// owner: @pohly
	// kep: https://kep.k8s.io/3077
	// alpha: v1.24
	//
	// Enables looking up a logger from a context.Context instead of using
	// the global fallback logger and manipulating the logger that is
	// used by a call chain.
	ContextualLogging featuregate.Feature = "ContextualLogging"

	// Allow fine-tuning of experimental, alpha-quality logging options.
	//
	// Per https://groups.google.com/g/kubernetes-sig-architecture/c/Nxsc7pfe5rw/m/vF2djJh0BAAJ
	// we want to avoid a proliferation of feature gates. This feature gate:
	// - will guard *a group* of logging options whose quality level is alpha.
	// - will never graduate to beta or stable.
	LoggingAlphaOptions featuregate.Feature = "LoggingAlphaOptions"

	// Allow fine-tuning of experimental, beta-quality logging options.
	//
	// Per https://groups.google.com/g/kubernetes-sig-architecture/c/Nxsc7pfe5rw/m/vF2djJh0BAAJ
	// we want to avoid a proliferation of feature gates. This feature gate:
	// - will guard *a group* of logging options whose quality level is beta.
	// - is thus *introduced* as beta
	// - will never graduate to stable.
	LoggingBetaOptions featuregate.Feature = "LoggingBetaOptions"

	// Stable logging options. Always enabled.
	LoggingStableOptions featuregate.Feature = "LoggingStableOptions"
)

const (
	// DefaultLogFormat is the traditional klog output format.
	DefaultLogFormat = "text"

	// JSONLogFormat emits each log message as a JSON struct.
	JSONLogFormat = "json"
)

Supported output formats.

const (
	// LogFlushFreqDefault is the default for the corresponding command line
	// parameter.
	LogFlushFreqDefault = 5 * time.Second
)

const (
	// LogFlushFreqFlagName is the name of the command line parameter.
	// Depending on how flags get added, it is either a stand-alone
	// value (logs.AddFlags) or part of LoggingConfiguration.
	LogFlushFreqFlagName = "log-flush-frequency"
)

Functions

func AddFeatureGates

func AddFeatureGates(mutableFeatureGate featuregate.MutableFeatureGate) error

AddFeatureGates adds all feature gates used by this package.

func AddFlags

func AddFlags(c *LoggingConfiguration, fs *pflag.FlagSet)

AddFlags adds command line flags for the configuration.

func RegisterLogFormat

func RegisterLogFormat(name string, factory LogFormatFactory, feature featuregate.Feature) error

RegisterLogFormat registers support for a new logging format. This must be called before using any of the methods in LoggingConfiguration. The feature must be one of those defined in this package (typically LoggingAlphaOptions, LoggingBetaOptions or LoggingStableOptions).

func SetRecommendedLoggingConfiguration

func SetRecommendedLoggingConfiguration(c *LoggingConfiguration)

SetRecommendedLoggingConfiguration sets the default logging configuration for fields that are unset.

Consumers who embed LoggingConfiguration in their own configuration structs may set custom defaults and then should call this function to add the global defaults.

func VModuleConfigurationPflag

func VModuleConfigurationPflag(value *VModuleConfiguration) pflag.Value

VModuleConfigurationPflag implements the pflag.Value interface for a VModuleConfiguration. The value pointer must not be nil.

func Validate

func Validate(c *LoggingConfiguration, featureGate featuregate.FeatureGate, fldPath *field.Path) field.ErrorList

Validate can be used to check for invalid settings without applying them. Most binaries should validate and apply the logging configuration as soon as possible via ValidateAndApply. The field path is optional: nil can be passed when the struct is not embedded in some larger struct.

func ValidateAndApply

func ValidateAndApply(c *LoggingConfiguration, featureGate featuregate.FeatureGate) error

ValidateAndApply combines validation and application of the logging configuration. This should be invoked as early as possible because then the rest of the program startup (including validation of other options) will already run with the final logging configuration.

The optional FeatureGate controls logging features. If nil, the default for these features is used.

func ValidateAndApplyAsField

func ValidateAndApplyAsField(c *LoggingConfiguration, featureGate featuregate.FeatureGate, fldPath *field.Path) error

ValidateAndApplyAsField is a variant of ValidateAndApply that should be used when the LoggingConfiguration is embedded in some larger configuration structure.

func VerbosityLevelPflag

func VerbosityLevelPflag(value *VerbosityLevel) pflag.Value

VerbosityLevelPflag implements the pflag.Value interface for a verbosity level value.

Types

type FormatOptions

type FormatOptions struct {
	// [Alpha] JSON contains options for logging format "json".
	// Only available when the LoggingAlphaOptions feature gate is enabled.
	JSON JSONOptions `json:"json,omitempty"`
}

FormatOptions contains options for the different logging formats.

func (*FormatOptions) DeepCopy

func (in *FormatOptions) DeepCopy() *FormatOptions

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new FormatOptions.

func (*FormatOptions) DeepCopyInto

func (in *FormatOptions) DeepCopyInto(out *FormatOptions)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.

type JSONOptions

type JSONOptions struct {
	// [Alpha] SplitStream redirects error messages to stderr while
	// info messages go to stdout, with buffering. The default is to write
	// both to stdout, without buffering. Only available when
	// the LoggingAlphaOptions feature gate is enabled.
	SplitStream bool `json:"splitStream,omitempty"`
	// [Alpha] InfoBufferSize sets the size of the info stream when
	// using split streams. The default is zero, which disables buffering.
	// Only available when the LoggingAlphaOptions feature gate is enabled.
	InfoBufferSize resource.QuantityValue `json:"infoBufferSize,omitempty"`
}

JSONOptions contains options for logging format "json".

func (*JSONOptions) DeepCopy

func (in *JSONOptions) DeepCopy() *JSONOptions

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new JSONOptions.

func (*JSONOptions) DeepCopyInto

func (in *JSONOptions) DeepCopyInto(out *JSONOptions)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.

type LogFormatFactory

type LogFormatFactory interface {
	// Create returns a logger with the requested configuration.
	// Returning a flush function for the logger is optional.
	// If provided, the caller must ensure that it is called
	// periodically (if desired) and at program exit.
	Create(c LoggingConfiguration) (log logr.Logger, flush func())
}

LogFormatFactory provides support for a certain additional, non-default log format.

type LoggingConfiguration

type LoggingConfiguration struct {
	// Format Flag specifies the structure of log messages.
	// default value of format is `text`
	Format string `json:"format,omitempty"`
	// Maximum number of nanoseconds (i.e. 1s = 1000000000) between log
	// flushes. Ignored if the selected logging backend writes log
	// messages without buffering.
	FlushFrequency time.Duration `json:"flushFrequency"`
	// Verbosity is the threshold that determines which log messages are
	// logged. Default is zero which logs only the most important
	// messages. Higher values enable additional messages. Error messages
	// are always logged.
	Verbosity VerbosityLevel `json:"verbosity"`
	// VModule overrides the verbosity threshold for individual files.
	// Only supported for "text" log format.
	VModule VModuleConfiguration `json:"vmodule,omitempty"`
	// [Alpha] Options holds additional parameters that are specific
	// to the different logging formats. Only the options for the selected
	// format get used, but all of them get validated.
	// Only available when the LoggingAlphaOptions feature gate is enabled.
	Options FormatOptions `json:"options,omitempty"`
}

LoggingConfiguration contains logging options.

func NewLoggingConfiguration

func NewLoggingConfiguration() *LoggingConfiguration

NewLoggingConfiguration returns a struct holding the default logging configuration.

func (*LoggingConfiguration) DeepCopy

func (in *LoggingConfiguration) DeepCopy() *LoggingConfiguration

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new LoggingConfiguration.

func (*LoggingConfiguration) DeepCopyInto

func (in *LoggingConfiguration) DeepCopyInto(out *LoggingConfiguration)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.

type VModuleConfiguration

type VModuleConfiguration []VModuleItem

VModuleConfiguration is a collection of individual file names or patterns and the corresponding verbosity threshold.

func (VModuleConfiguration) DeepCopy

func (in VModuleConfiguration) DeepCopy() VModuleConfiguration

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new VModuleConfiguration.

func (VModuleConfiguration) DeepCopyInto

func (in VModuleConfiguration) DeepCopyInto(out *VModuleConfiguration)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.

type VModuleItem

type VModuleItem struct {
	// FilePattern is a base file name (i.e. minus the ".go" suffix and
	// directory) or a "glob" pattern for such a name. It must not contain
	// comma and equal signs because those are separators for the
	// corresponding klog command line argument.
	FilePattern string `json:"filePattern"`
	// Verbosity is the threshold for log messages emitted inside files
	// that match the pattern.
	Verbosity VerbosityLevel `json:"verbosity"`
}

VModuleItem defines verbosity for one or more files which match a certain glob pattern.

func (*VModuleItem) DeepCopy

func (in *VModuleItem) DeepCopy() *VModuleItem

DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new VModuleItem.

func (*VModuleItem) DeepCopyInto

func (in *VModuleItem) DeepCopyInto(out *VModuleItem)

DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.

type VerbosityLevel

type VerbosityLevel uint32

VerbosityLevel represents a klog or logr verbosity threshold.