VictoriaMetrics/app/vmalert/rule.go
Roman Khavronenko fb6eab03a2
Vmalert compliance improvements (#2320)
* vmalert: add support for `sortByLabel` template function

* vmalert: update API according to Prometheus conformance program

The changes to the API, field names and URL path has been made
according to the Prometheus specification for `alert_generator`
https://github.com/prometheus/compliance/blob/main/alert_generator/specification.md

* vmalert: fix the timestamp of the evaluated rules

The timestamp used for alert's `EndsAt` was calculated
before sending the notification. While the correct way
is to use the timestamp taken right before rules evaluation.

* vmalert: add `-datasource.queryTimeAlignment` flag

The flag is supposed to provide ability to disable `time`
param alignment when executing rules. By default, this flag
is enabled, so it remains backward compatible.

The flag was introduced to achieve better compatibility
with Prometheus behaviour according to https://github.com/prometheus/compliance/blob/main/alert_generator/specification.md

Signed-off-by: hagen1778 <roman@victoriametrics.com>
2022-03-15 11:54:53 +00:00

31 lines
980 B
Go

package main
import (
"context"
"errors"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
"time"
)
// Rule represents alerting or recording rule
// that has unique ID, can be Executed and
// updated with other Rule.
type Rule interface {
// ID returns unique ID that may be used for
// identifying this Rule among others.
ID() uint64
// Exec executes the rule with given context
Exec(ctx context.Context) ([]prompbmarshal.TimeSeries, error)
// ExecRange executes the rule on the given time range
ExecRange(ctx context.Context, start, end time.Time) ([]prompbmarshal.TimeSeries, error)
// UpdateWith performs modification of current Rule
// with fields of the given Rule.
UpdateWith(Rule) error
// ToAPI converts Rule into APIRule
ToAPI() APIRule
// Close performs the shutdown procedures for rule
// such as metrics unregister
Close()
}
var errDuplicate = errors.New("result contains metrics with the same labelset after applying rule labels")