mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-15 08:23:34 +01:00
9f578e389c
The commit adds a support for template function `query`, `first` and `value`. The function `query` executes a MetricsQL query for active alerts. In vmalert we update templates on every evaluation for active alerts to keep them up to date. With `query` func it may become a perf issue since it will fire a query on every execution. We should keep it in mind for now. https://github.com/VictoriaMetrics/VictoriaMetrics/issues/539
53 lines
1.1 KiB
Go
53 lines
1.1 KiB
Go
package datasource
|
|
|
|
import "context"
|
|
|
|
// Querier interface wraps Query method which
|
|
// executes given query and returns list of Metrics
|
|
// as result
|
|
type Querier interface {
|
|
Query(ctx context.Context, query string) ([]Metric, error)
|
|
}
|
|
|
|
// Metric is the basic entity which should be return by datasource
|
|
// It represents single data point with full list of labels
|
|
type Metric struct {
|
|
Labels []Label
|
|
Timestamp int64
|
|
Value float64
|
|
}
|
|
|
|
// SetLabel adds or updates existing one label
|
|
// by the given key and label
|
|
func (m *Metric) SetLabel(key, value string) {
|
|
for i, l := range m.Labels {
|
|
if l.Name == key {
|
|
m.Labels[i].Value = value
|
|
return
|
|
}
|
|
}
|
|
m.AddLabel(key, value)
|
|
}
|
|
|
|
// AddLabel appends the given label to the label set
|
|
func (m *Metric) AddLabel(key, value string) {
|
|
m.Labels = append(m.Labels, Label{Name: key, Value: value})
|
|
}
|
|
|
|
// Label returns the given label value.
|
|
// If label is missing empty string will be returned
|
|
func (m *Metric) Label(key string) string {
|
|
for _, l := range m.Labels {
|
|
if l.Name == key {
|
|
return l.Value
|
|
}
|
|
}
|
|
return ""
|
|
}
|
|
|
|
// Label represents metric's label
|
|
type Label struct {
|
|
Name string
|
|
Value string
|
|
}
|