relabel

Documentation

Index

• Variables
• func Process(lbls labels.Labels, cfgs ...*Config) (ret labels.Labels, keep bool)
• func ProcessBuilder(lb *labels.Builder, cfgs ...*Config) (keep bool)
• type Action
  • func (a *Action) UnmarshalYAML(unmarshal func(interface{}) error) error
• type Config
  • func (c *Config) UnmarshalYAML(unmarshal func(interface{}) error) error
  • func (c *Config) Validate() error
• type Regexp
  • func MustNewRegexp(s string) Regexp
  • func NewRegexp(s string) (Regexp, error)
  • func (re Regexp) IsZero() bool
  • func (re Regexp) MarshalYAML() (interface{}, error)
  • func (re Regexp) String() string
  • func (re *Regexp) UnmarshalYAML(unmarshal func(interface{}) error) error

Variables

var (
	DefaultRelabelConfig = Config{
		Action:      Replace,
		Separator:   ";",
		Regex:       MustNewRegexp("(.*)"),
		Replacement: "$1",
	}
)

Functions

func Process

func Process(lbls labels.Labels, cfgs ...*Config) (ret labels.Labels, keep bool)

Process returns a relabeled version of the given label set. The relabel configurations are applied in order of input. There are circumstances where Process will modify the input label. If you want to avoid issues with the input label set being modified, at the cost of higher memory usage, you can use lbls.Copy(). If a label set is dropped, EmptyLabels and false is returned.

func ProcessBuilder

func ProcessBuilder(lb *labels.Builder, cfgs ...*Config) (keep bool)

ProcessBuilder is like Process, but the caller passes a labels.Builder containing the initial set of labels, which is mutated by the rules.

Types

type Action

type Action string

Action is the action to be performed on relabeling.

const (
	// Replace performs a regex replacement.
	Replace Action = "replace"
	// Keep drops targets for which the input does not match the regex.
	Keep Action = "keep"
	// Drop drops targets for which the input does match the regex.
	Drop Action = "drop"
	// KeepEqual drops targets for which the input does not match the target.
	KeepEqual Action = "keepequal"
	// DropEqual drops targets for which the input does match the target.
	DropEqual Action = "dropequal"
	// HashMod sets a label to the modulus of a hash of labels.
	HashMod Action = "hashmod"
	// LabelMap copies labels to other labelnames based on a regex.
	LabelMap Action = "labelmap"
	// LabelDrop drops any label matching the regex.
	LabelDrop Action = "labeldrop"
	// LabelKeep drops any label not matching the regex.
	LabelKeep Action = "labelkeep"
	// Lowercase maps input letters to their lower case.
	Lowercase Action = "lowercase"
	// Uppercase maps input letters to their upper case.
	Uppercase Action = "uppercase"
)

func (*Action) UnmarshalYAML

func (a *Action) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML implements the yaml.Unmarshaler interface.

type Config

type Config struct {
	// A list of labels from which values are taken and concatenated
	// with the configured separator in order.
	SourceLabels model.LabelNames `yaml:"source_labels,flow,omitempty"`
	// Separator is the string between concatenated values from the source labels.
	Separator string `yaml:"separator,omitempty"`
	// Regex against which the concatenation is matched.
	Regex Regexp `yaml:"regex,omitempty"`
	// Modulus to take of the hash of concatenated values from the source labels.
	Modulus uint64 `yaml:"modulus,omitempty"`
	// TargetLabel is the label to which the resulting string is written in a replacement.
	// Regexp interpolation is allowed for the replace action.
	TargetLabel string `yaml:"target_label,omitempty"`
	// Replacement is the regex replacement pattern to be used.
	Replacement string `yaml:"replacement,omitempty"`
	// Action is the action to be performed for the relabeling.
	Action Action `yaml:"action,omitempty"`
}

Config is the configuration for relabeling of target label sets.

func (*Config) UnmarshalYAML

func (c *Config) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML implements the yaml.Unmarshaler interface.

func (*Config) Validate

func (c *Config) Validate() error

type Regexp

type Regexp struct {
	*regexp.Regexp
}

Regexp encapsulates a regexp.Regexp and makes it YAML marshalable.

func MustNewRegexp

func MustNewRegexp(s string) Regexp

MustNewRegexp works like NewRegexp, but panics if the regular expression does not compile.

func NewRegexp

func NewRegexp(s string) (Regexp, error)

NewRegexp creates a new anchored Regexp and returns an error if the passed-in regular expression does not compile.

func (Regexp) IsZero

func (re Regexp) IsZero() bool

IsZero implements the yaml.IsZeroer interface.

func (Regexp) MarshalYAML

func (re Regexp) MarshalYAML() (interface{}, error)

MarshalYAML implements the yaml.Marshaler interface.

func (Regexp) String

func (re Regexp) String() string

String returns the original string used to compile the regular expression.

func (*Regexp) UnmarshalYAML

func (re *Regexp) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML implements the yaml.Unmarshaler interface.