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43f580c299
* Alerting NG: prototype v2 (WIP) * Separate eval package * Modify eval alert definition endpoint * Disable migration if ngalert is not enabled * Remove premature test * Fix lint issues * Delete obsolete struct * Apply suggestions from code review * Update pkg/services/ngalert/ngalert.go Co-authored-by: Kyle Brandt <kyle@grafana.com> * Add API endpoint for listing alert definitions * Introduce index for alert_definition table * make ds object for expression to avoid panic * wrap error * Update pkg/services/ngalert/eval/eval.go * Swith to backend.DataQuery * Export TransformWrapper callback * Fix lint issues * Update pkg/services/ngalert/ngalert.go Co-authored-by: Kyle Brandt <kyle@grafana.com> * Validate alert definitions before storing them * Introduce AlertQuery * Add test * Add QueryType in AlertQuery * Accept only float64 (seconds) durations * Apply suggestions from code review * Get rid of bus * Do not export symbols * Fix failing test * Fix failure due to service initialization order Introduce MediumHigh service priority and assign it to backendplugin service * Fix test * Apply suggestions from code review * Fix renamed reference Co-authored-by: Kyle Brandt <kyle@grafana.com>
92 lines
2.9 KiB
Go
92 lines
2.9 KiB
Go
package ngalert
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import (
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"github.com/grafana/grafana/pkg/services/ngalert/eval"
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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/models"
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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"
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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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// 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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log log.Logger
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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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ng.registerAPIEndpoints()
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return nil
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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 false
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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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alertDefinition := migrator.Table{
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Name: "alert_definition",
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Columns: []*migrator.Column{
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{Name: "id", Type: migrator.DB_BigInt, IsPrimaryKey: true, IsAutoIncrement: true},
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{Name: "org_id", Type: migrator.DB_BigInt, Nullable: false},
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{Name: "name", Type: migrator.DB_NVarchar, Length: 255, Nullable: false},
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{Name: "condition", Type: migrator.DB_NVarchar, Length: 255, Nullable: false},
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{Name: "data", Type: migrator.DB_Text, Nullable: false},
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},
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Indices: []*migrator.Index{
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{Cols: []string{"org_id"}, Type: migrator.IndexType},
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},
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}
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// create table
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mg.AddMigration("create alert_definition table", migrator.NewAddTableMigration(alertDefinition))
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// create indices
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mg.AddMigration("add index alert_definition org_id", migrator.NewAddIndexMigration(alertDefinition, alertDefinition.Indices[0]))
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}
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// LoadAlertCondition returns a Condition object for the given alertDefinitionID.
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func (ng *AlertNG) LoadAlertCondition(alertDefinitionID int64, signedInUser *models.SignedInUser, skipCache bool) (*eval.Condition, error) {
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getAlertDefinitionByIDQuery := getAlertDefinitionByIDQuery{ID: alertDefinitionID}
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if err := ng.getAlertDefinitionByID(&getAlertDefinitionByIDQuery); err != nil {
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return nil, err
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}
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alertDefinition := getAlertDefinitionByIDQuery.Result
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err := ng.validateAlertDefinition(alertDefinition, signedInUser, skipCache)
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if err != nil {
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return nil, err
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}
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return &eval.Condition{
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RefID: alertDefinition.Condition,
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QueriesAndExpressions: alertDefinition.Data,
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}, nil
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}
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