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81 lines
3.1 KiB
Go
81 lines
3.1 KiB
Go
// Copyright 2013 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package rules
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import (
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"context"
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"net/url"
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"time"
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"github.com/prometheus/prometheus/model/labels"
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"github.com/prometheus/prometheus/promql"
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"github.com/prometheus/prometheus/promql/parser"
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)
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// RuleHealth describes the health state of a rule.
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type RuleHealth string
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// The possible health states of a rule based on the last execution.
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const (
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HealthUnknown RuleHealth = "unknown"
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HealthGood RuleHealth = "ok"
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HealthBad RuleHealth = "err"
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)
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// A Rule encapsulates a vector expression which is evaluated at a specified
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// interval and acted upon (currently either recorded or used for alerting).
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type Rule interface {
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Name() string
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// Labels of the rule.
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Labels() labels.Labels
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// Eval evaluates the rule, including any associated recording or alerting actions.
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Eval(context.Context, time.Time, QueryFunc, *url.URL, int) (promql.Vector, error)
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// String returns a human-readable string representation of the rule.
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String() string
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// Query returns the rule query expression.
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Query() parser.Expr
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// SetLastError sets the current error experienced by the rule.
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SetLastError(error)
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// LastError returns the last error experienced by the rule.
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LastError() error
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// SetHealth sets the current health of the rule.
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SetHealth(RuleHealth)
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// Health returns the current health of the rule.
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Health() RuleHealth
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SetEvaluationDuration(time.Duration)
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// GetEvaluationDuration returns last evaluation duration.
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// NOTE: Used dynamically by rules.html template.
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GetEvaluationDuration() time.Duration
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SetEvaluationTimestamp(time.Time)
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// GetEvaluationTimestamp returns last evaluation timestamp.
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// NOTE: Used dynamically by rules.html template.
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GetEvaluationTimestamp() time.Time
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// SetNoDependentRules sets whether there's no other rule in the rule group that depends on this rule.
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SetNoDependentRules(bool)
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// NoDependentRules returns true if it's guaranteed that in the rule group there's no other rule
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// which depends on this one. In case this function returns false there's no such guarantee, which
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// means there may or may not be other rules depending on this one.
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NoDependentRules() bool
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// SetNoDependencyRules sets whether this rule doesn't depend on the output of any rule in the rule group.
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SetNoDependencyRules(bool)
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// NoDependencyRules returns true if it's guaranteed that this rule doesn't depend on the output of
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// any other rule in the group. In case this function returns false there's no such guarantee, which
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// means the rule may or may not depend on other rules.
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NoDependencyRules() bool
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}
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