classic

Documentation

Index

• Constants
• type ConditionEvalJSON
• type ConditionJSON
• type ConditionOperatorJSON
• type ConditionQueryJSON
• type ConditionReducerJSON
• type ConditionsCmd
  • func UnmarshalConditionsCmd(rawQuery map[string]interface{}, refID string) (*ConditionsCmd, error)
  • func (cmd *ConditionsCmd) Execute(ctx context.Context, t time.Time, vars mathexp.Vars, tracer tracing.Tracer) (mathexp.Results, error)
  • func (cmd *ConditionsCmd) NeedsVars() []string
• type EvalMatch
  • func (em EvalMatch) MarshalJSON() ([]byte, error)
• type EvaluatorKind

Constants

const (
	EvaluatorNoValue = iota
	EvaluatorThreshold
	EvaluatorRanged
)

Types

type ConditionEvalJSON

type ConditionEvalJSON struct {
	Params []float64 `json:"params"`
	Type   string    `json:"type"` // e.g. "gt"
}

type ConditionJSON

type ConditionJSON struct {
	Evaluator ConditionEvalJSON     `json:"evaluator"`
	Operator  ConditionOperatorJSON `json:"operator"`
	Query     ConditionQueryJSON    `json:"query"`
	Reducer   ConditionReducerJSON  `json:"reducer"`
}

ConditionJSON is the JSON model for a single condition in ConditionsCmd. It is based on services/alerting/conditions/query.go's newQueryCondition().

type ConditionOperatorJSON

type ConditionOperatorJSON struct {
	Type string `json:"type"`
}

type ConditionQueryJSON

type ConditionQueryJSON struct {
	Params []string `json:"params"`
}

type ConditionReducerJSON

type ConditionReducerJSON struct {
	Type string `json:"type"`
}

type ConditionsCmd

type ConditionsCmd struct {
	Conditions []condition
	RefID      string
}

ConditionsCmd is a command that supports the reduction and comparison of conditions.

A condition in ConditionsCmd can reduce a time series, contain an instant metric, or the result of another expression; and checks if it exceeds a threshold, falls within a range, or does not contain a value.

If ConditionsCmd contains more than one condition, it reduces the boolean outcomes of the threshold, range or value checks using the logical operator of the right hand side condition until all conditions have been reduced to a single boolean outcome. ConditionsCmd does not follow operator precedence.

For example if we have the following classic condition:

min(A) > 5 OR max(B) < 10 AND C = 1

which reduces to the following boolean outcomes:

false OR true AND true

then the outcome of ConditionsCmd is true.

func UnmarshalConditionsCmd

func UnmarshalConditionsCmd(rawQuery map[string]interface{}, refID string) (*ConditionsCmd, error)

UnmarshalConditionsCmd creates a new ConditionsCmd.

func (*ConditionsCmd) Execute

func (cmd *ConditionsCmd) Execute(ctx context.Context, t time.Time, vars mathexp.Vars, tracer tracing.Tracer) (mathexp.Results, error)

Execute runs the command and returns the results or an error if the command failed to execute.

func (*ConditionsCmd) NeedsVars

func (cmd *ConditionsCmd) NeedsVars() []string

NeedsVars returns the variable names (refIds) that are dependencies to execute the command and allows the command to fulfill the Command interface.

type EvalMatch

type EvalMatch struct {
	Value  *float64    `json:"value"`
	Metric string      `json:"metric"`
	Labels data.Labels `json:"labels"`
}

EvalMatch represents the series violating the threshold. It goes into the metadata of data frames so it can be extracted.

func (EvalMatch) MarshalJSON

func (em EvalMatch) MarshalJSON() ([]byte, error)

type EvaluatorKind

type EvaluatorKind int