mirror of
https://github.com/grafana/grafana.git
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254 lines
8.3 KiB
Go
254 lines
8.3 KiB
Go
package api
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import (
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"errors"
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"fmt"
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"net/http"
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"net/url"
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"strconv"
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"time"
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"github.com/benbjohnson/clock"
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"github.com/grafana/alerting/models"
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amv2 "github.com/prometheus/alertmanager/api/v2/models"
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"github.com/grafana/grafana-plugin-sdk-go/data"
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"github.com/grafana/grafana/pkg/api/response"
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"github.com/grafana/grafana/pkg/infra/log"
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"github.com/grafana/grafana/pkg/infra/tracing"
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"github.com/grafana/grafana/pkg/services/accesscontrol"
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contextmodel "github.com/grafana/grafana/pkg/services/contexthandler/model"
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"github.com/grafana/grafana/pkg/services/datasources"
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"github.com/grafana/grafana/pkg/services/featuremgmt"
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"github.com/grafana/grafana/pkg/services/folder"
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apimodels "github.com/grafana/grafana/pkg/services/ngalert/api/tooling/definitions"
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"github.com/grafana/grafana/pkg/services/ngalert/backtesting"
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"github.com/grafana/grafana/pkg/services/ngalert/eval"
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ngmodels "github.com/grafana/grafana/pkg/services/ngalert/models"
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"github.com/grafana/grafana/pkg/services/ngalert/state"
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"github.com/grafana/grafana/pkg/setting"
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"github.com/grafana/grafana/pkg/util"
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)
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type TestingApiSrv struct {
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*AlertingProxy
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DatasourceCache datasources.CacheService
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log log.Logger
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accessControl accesscontrol.AccessControl
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evaluator eval.EvaluatorFactory
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cfg *setting.UnifiedAlertingSettings
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backtesting *backtesting.Engine
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featureManager featuremgmt.FeatureToggles
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appUrl *url.URL
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tracer tracing.Tracer
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}
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// RouteTestGrafanaRuleConfig returns a list of potential alerts for a given rule configuration. This is intended to be
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// as true as possible to what would be generated by the ruler except that the resulting alerts are not filtered to
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// only Resolved / Firing and ready to send.
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func (srv TestingApiSrv) RouteTestGrafanaRuleConfig(c *contextmodel.ReqContext, body apimodels.PostableExtendedRuleNodeExtended) response.Response {
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rule, err := validateRuleNode(
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&body.Rule,
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body.RuleGroup,
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srv.cfg.BaseInterval,
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c.SignedInUser.GetOrgID(),
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&folder.Folder{
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OrgID: c.SignedInUser.GetOrgID(),
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UID: body.NamespaceUID,
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Title: body.NamespaceTitle,
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},
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srv.cfg,
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)
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if err != nil {
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return ErrResp(http.StatusBadRequest, err, "")
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}
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if !authorizeDatasourceAccessForRule(rule, func(evaluator accesscontrol.Evaluator) bool {
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return accesscontrol.HasAccess(srv.accessControl, c)(evaluator)
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}) {
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return errorToResponse(fmt.Errorf("%w to query one or many data sources used by the rule", ErrAuthorization))
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}
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evaluator, err := srv.evaluator.Create(eval.NewContext(c.Req.Context(), c.SignedInUser), rule.GetEvalCondition())
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if err != nil {
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return ErrResp(http.StatusBadRequest, err, "Failed to build evaluator for queries and expressions")
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}
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now := time.Now()
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results, err := evaluator.Evaluate(c.Req.Context(), now)
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if err != nil {
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return ErrResp(http.StatusInternalServerError, err, "Failed to evaluate queries")
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}
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cfg := state.ManagerCfg{
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Metrics: nil,
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ExternalURL: srv.appUrl,
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InstanceStore: nil,
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Images: &backtesting.NoopImageService{},
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Clock: clock.New(),
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Historian: nil,
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MaxStateSaveConcurrency: 1,
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Tracer: srv.tracer,
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Log: log.New("ngalert.state.manager"),
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}
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manager := state.NewManager(cfg)
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includeFolder := !srv.cfg.ReservedLabels.IsReservedLabelDisabled(models.FolderTitleLabel)
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transitions := manager.ProcessEvalResults(
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c.Req.Context(),
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now,
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rule,
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results,
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state.GetRuleExtraLabels(rule, body.NamespaceTitle, includeFolder),
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)
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alerts := make([]*amv2.PostableAlert, 0, len(transitions))
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for _, alertState := range transitions {
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alerts = append(alerts, state.StateToPostableAlert(alertState.State, srv.appUrl))
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}
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return response.JSON(http.StatusOK, alerts)
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}
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func (srv TestingApiSrv) RouteTestRuleConfig(c *contextmodel.ReqContext, body apimodels.TestRulePayload, datasourceUID string) response.Response {
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if body.Type() != apimodels.LoTexRulerBackend {
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return errorToResponse(backendTypeDoesNotMatchPayloadTypeError(apimodels.LoTexRulerBackend, body.Type().String()))
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}
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ds, err := getDatasourceByUID(c, srv.DatasourceCache, apimodels.LoTexRulerBackend)
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if err != nil {
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return errorToResponse(err)
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}
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var path string
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switch ds.Type {
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case "loki":
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path = "loki/api/v1/query"
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case "prometheus":
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path = "api/v1/query"
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default:
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// this should not happen because getDatasourceByUID would not return the data source
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return errorToResponse(unexpectedDatasourceTypeError(ds.Type, "loki, prometheus"))
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}
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t := timeNow()
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queryURL, err := url.Parse(path)
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if err != nil {
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return ErrResp(http.StatusInternalServerError, err, "failed to parse url")
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}
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params := queryURL.Query()
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params.Set("query", body.Expr)
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params.Set("time", strconv.FormatInt(t.Unix(), 10))
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queryURL.RawQuery = params.Encode()
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return srv.withReq(
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c,
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http.MethodGet,
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queryURL,
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nil,
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instantQueryResultsExtractor,
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nil,
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)
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}
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func (srv TestingApiSrv) RouteEvalQueries(c *contextmodel.ReqContext, cmd apimodels.EvalQueriesPayload) response.Response {
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queries := AlertQueriesFromApiAlertQueries(cmd.Data)
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if !authorizeDatasourceAccessForRule(&ngmodels.AlertRule{Data: queries}, func(evaluator accesscontrol.Evaluator) bool {
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return accesscontrol.HasAccess(srv.accessControl, c)(evaluator)
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}) {
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return ErrResp(http.StatusUnauthorized, fmt.Errorf("%w to query one or many data sources used by the rule", ErrAuthorization), "")
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}
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cond := ngmodels.Condition{
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Condition: "",
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Data: queries,
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}
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if len(cmd.Data) > 0 {
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cond.Condition = cmd.Data[0].RefID
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}
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evaluator, err := srv.evaluator.Create(eval.NewContext(c.Req.Context(), c.SignedInUser), cond)
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if err != nil {
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return ErrResp(http.StatusBadRequest, err, "Failed to build evaluator for queries and expressions")
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}
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now := cmd.Now
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if now.IsZero() {
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now = timeNow()
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}
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evalResults, err := evaluator.EvaluateRaw(c.Req.Context(), now)
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if err != nil {
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return ErrResp(http.StatusInternalServerError, err, "Failed to evaluate queries and expressions")
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}
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return response.JSONStreaming(http.StatusOK, evalResults)
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}
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func (srv TestingApiSrv) BacktestAlertRule(c *contextmodel.ReqContext, cmd apimodels.BacktestConfig) response.Response {
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if !srv.featureManager.IsEnabled(featuremgmt.FlagAlertingBacktesting) {
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return ErrResp(http.StatusNotFound, nil, "Backgtesting API is not enabled")
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}
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if cmd.From.After(cmd.To) {
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return ErrResp(400, nil, "From cannot be greater than To")
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}
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noDataState, err := ngmodels.NoDataStateFromString(string(cmd.NoDataState))
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if err != nil {
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return ErrResp(400, err, "")
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}
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forInterval := time.Duration(cmd.For)
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if forInterval < 0 {
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return ErrResp(400, nil, "Bad For interval")
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}
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intervalSeconds, err := validateInterval(srv.cfg, time.Duration(cmd.Interval))
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if err != nil {
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return ErrResp(400, err, "")
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}
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queries := AlertQueriesFromApiAlertQueries(cmd.Data)
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if !authorizeDatasourceAccessForRule(&ngmodels.AlertRule{Data: queries}, func(evaluator accesscontrol.Evaluator) bool {
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return accesscontrol.HasAccess(srv.accessControl, c)(evaluator)
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}) {
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return errorToResponse(fmt.Errorf("%w to query one or many data sources used by the rule", ErrAuthorization))
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}
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rule := &ngmodels.AlertRule{
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// ID: 0,
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// Updated: time.Time{},
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// Version: 0,
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// NamespaceUID: "",
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// DashboardUID: nil,
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// PanelID: nil,
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// RuleGroup: "",
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// RuleGroupIndex: 0,
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// ExecErrState: "",
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Title: cmd.Title,
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// prefix backtesting- is to distinguish between executions of regular rule and backtesting in logs (like expression engine, evaluator, state manager etc)
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UID: "backtesting-" + util.GenerateShortUID(),
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OrgID: c.SignedInUser.GetOrgID(),
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Condition: cmd.Condition,
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Data: queries,
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IntervalSeconds: intervalSeconds,
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NoDataState: noDataState,
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For: forInterval,
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Annotations: cmd.Annotations,
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Labels: cmd.Labels,
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}
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result, err := srv.backtesting.Test(c.Req.Context(), c.SignedInUser, rule, cmd.From, cmd.To)
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if err != nil {
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if errors.Is(err, backtesting.ErrInvalidInputData) {
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return ErrResp(400, err, "Failed to evaluate")
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}
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return ErrResp(500, err, "Failed to evaluate")
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}
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body, err := data.FrameToJSON(result, data.IncludeAll)
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if err != nil {
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return ErrResp(500, err, "Failed to convert frame to JSON")
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}
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return response.JSON(http.StatusOK, body)
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}
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