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cc74b1fe46
* Alerting: Add database table for persisting alerting configuration * Fix the linter * Address review comments * Don't split templates and configuration It is already bundled together as part of a of the API so might as well marshall it directly.
109 lines
3.0 KiB
Go
109 lines
3.0 KiB
Go
package ngalert
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import (
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"context"
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"time"
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"github.com/grafana/grafana/pkg/services/ngalert/api"
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"github.com/grafana/grafana/pkg/services/ngalert/schedule"
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"github.com/grafana/grafana/pkg/services/ngalert/store"
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"github.com/benbjohnson/clock"
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"github.com/grafana/grafana/pkg/services/ngalert/eval"
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"github.com/grafana/grafana/pkg/services/sqlstore"
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"github.com/grafana/grafana/pkg/tsdb"
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"github.com/grafana/grafana/pkg/api/routing"
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"github.com/grafana/grafana/pkg/infra/log"
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"github.com/grafana/grafana/pkg/registry"
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"github.com/grafana/grafana/pkg/services/datasources"
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"github.com/grafana/grafana/pkg/services/sqlstore/migrator"
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"github.com/grafana/grafana/pkg/setting"
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)
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const (
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maxAttempts int64 = 3
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// scheduler interval
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// changing this value is discouraged
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// because this could cause existing alert definition
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// with intervals that are not exactly divided by this number
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// not to be evaluated
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baseIntervalSeconds = 10
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// default alert definiiton interval
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defaultIntervalSeconds int64 = 6 * baseIntervalSeconds
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)
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// AlertNG is the service for evaluating the condition of an alert definition.
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type AlertNG struct {
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Cfg *setting.Cfg `inject:""`
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DatasourceCache datasources.CacheService `inject:""`
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RouteRegister routing.RouteRegister `inject:""`
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SQLStore *sqlstore.SQLStore `inject:""`
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DataService *tsdb.Service `inject:""`
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Log log.Logger
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schedule schedule.ScheduleService
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}
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func init() {
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registry.RegisterService(&AlertNG{})
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}
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// Init initializes the AlertingService.
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func (ng *AlertNG) Init() error {
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ng.Log = log.New("ngalert")
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baseInterval := baseIntervalSeconds * time.Second
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store := store.DBstore{BaseInterval: baseInterval, DefaultIntervalSeconds: defaultIntervalSeconds, SQLStore: ng.SQLStore}
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schedCfg := schedule.SchedulerCfg{
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C: clock.New(),
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BaseInterval: baseInterval,
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Logger: ng.Log,
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MaxAttempts: maxAttempts,
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Evaluator: eval.Evaluator{Cfg: ng.Cfg},
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Store: store,
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}
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ng.schedule = schedule.NewScheduler(schedCfg, ng.DataService)
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api := api.API{
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Cfg: ng.Cfg,
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DatasourceCache: ng.DatasourceCache,
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RouteRegister: ng.RouteRegister,
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DataService: ng.DataService,
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Schedule: ng.schedule,
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Store: store}
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api.RegisterAPIEndpoints()
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return nil
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}
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// Run starts the scheduler
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func (ng *AlertNG) Run(ctx context.Context) error {
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ng.Log.Debug("ngalert starting")
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return ng.schedule.Ticker(ctx)
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}
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// IsDisabled returns true if the alerting service is disable for this instance.
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func (ng *AlertNG) IsDisabled() bool {
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if ng.Cfg == nil {
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return true
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}
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// Check also about expressions?
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return !ng.Cfg.IsNgAlertEnabled()
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}
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// AddMigration defines database migrations.
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// If Alerting NG is not enabled does nothing.
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func (ng *AlertNG) AddMigration(mg *migrator.Migrator) {
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if ng.IsDisabled() {
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return
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}
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addAlertDefinitionMigrations(mg)
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addAlertDefinitionVersionMigrations(mg)
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// Create alert_instance table
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alertInstanceMigration(mg)
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alertmanagerConfigurationMigration(mg)
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}
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