Alerting: Allow querying of Alerts from notifications (#32614)

* Alerting: Allow querying of Alerts from notifications

* Wire everything up

* Remove unused functions

* Remove duplicate line

go.mod

@@ -41,7 +41,7 @@ require (
 	github.com/google/go-cmp v0.5.5
 	github.com/google/uuid v1.2.0
 	github.com/gosimple/slug v1.9.0
-	github.com/grafana/alerting-api v0.0.0-20210405171311-97906879c771
+	github.com/grafana/alerting-api v0.0.0-20210407150830-64bd267999d1
 	github.com/grafana/grafana-aws-sdk v0.4.0
 	github.com/grafana/grafana-live-sdk v0.0.4
 	github.com/grafana/grafana-plugin-model v0.0.0-20190930120109-1fc953a61fb4

go.sum

@@ -809,10 +809,8 @@ github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0U
 github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/gosimple/slug v1.9.0 h1:r5vDcYrFz9BmfIAMC829un9hq7hKM4cHUrsv36LbEqs=
 github.com/gosimple/slug v1.9.0/go.mod h1:AMZ+sOVe65uByN3kgEyf9WEBKBCSS+dJjMX9x4vDJbg=
-github.com/grafana/alerting-api v0.0.0-20210331135037-3294563b51bb h1:Hj25Whc/TRv0hSLm5VN0FJ5R4yZ6M4ycRcBgu7bsEAc=
-github.com/grafana/alerting-api v0.0.0-20210331135037-3294563b51bb/go.mod h1:5IppnPguSHcCbVLGCVzVjBvuQZNbYgVJ4KyXXjhCyWY=
-github.com/grafana/alerting-api v0.0.0-20210405171311-97906879c771 h1:CTmKHUu2n0O9fPTSXb+s5FO8Em9Atw57Z7mvw7lt6IM=
-github.com/grafana/alerting-api v0.0.0-20210405171311-97906879c771/go.mod h1:5IppnPguSHcCbVLGCVzVjBvuQZNbYgVJ4KyXXjhCyWY=
+github.com/grafana/alerting-api v0.0.0-20210407150830-64bd267999d1 h1:pbG8BsRHezUvUjMxwq+uZsx1ZMEQsfSj26KSd/H3A9g=
+github.com/grafana/alerting-api v0.0.0-20210407150830-64bd267999d1/go.mod h1:Ce2PwraBlFMa+P0ArBzubfB/BXZV35mfYWQjM8C/BSE=
 github.com/grafana/go-mssqldb v0.0.0-20210326084033-d0ce3c521036 h1:GplhUk6Xes5JIhUUrggPcPBhOn+eT8+WsHiebvq7GgA=
 github.com/grafana/go-mssqldb v0.0.0-20210326084033-d0ce3c521036/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
 github.com/grafana/grafana v1.9.2-0.20210308201921-4ce0a49eac03/go.mod h1:AHRRvd4utJGY25J5nW8aL7wZzn/LcJ0z2za9oOp14j4=
@@ -1440,7 +1438,6 @@ github.com/prometheus/prometheus v1.8.2-0.20210217141258-a6be548dbc17 h1:VN3p3Nb
 github.com/prometheus/prometheus v1.8.2-0.20210217141258-a6be548dbc17/go.mod h1:dv3B1syqmkrkmo665MPCU6L8PbTXIiUeg/OEQULLNxA=
 github.com/prometheus/statsd_exporter v0.15.0/go.mod h1:Dv8HnkoLQkeEjkIE4/2ndAA7WL1zHKK7WMqFQqu72rw=
 github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
-github.com/quasilyte/go-ruleguard/dsl/fluent v0.0.0-20201222093424-5d7e62a465d3 h1:eL7x4/zMnlquMxYe7V078BD7MGskZ0daGln+SJCVzuY=
 github.com/quasilyte/go-ruleguard/dsl/fluent v0.0.0-20201222093424-5d7e62a465d3/go.mod h1:P7JlQWFT7jDcFZMtUPQbtGzzzxva3rBn6oIF+LPwFcM=
 github.com/rafaeljusto/redigomock v0.0.0-20190202135759-257e089e14a1/go.mod h1:JaY6n2sDr+z2WTsXkOmNRUfDy6FN0L6Nk7x06ndm4tY=
 github.com/rainycape/unidecode v0.0.0-20150907023854-cb7f23ec59be h1:ta7tUOvsPHVHGom5hKW5VXNc2xZIkfCKP8iaqOyYtUQ=

pkg/services/ngalert/api/api.go

@@ -30,11 +30,18 @@ import (
 var timeNow = time.Now
 
 type Alertmanager interface {
+	// Configuration
 	ApplyConfig(config *apimodels.PostableUserConfig) error
+
+	// Silences
 	CreateSilence(ps *apimodels.PostableSilence) (string, error)
 	DeleteSilence(silenceID string) error
 	GetSilence(silenceID string) (apimodels.GettableSilence, error)
-	ListSilences(filters []string) (apimodels.GettableSilences, error)
+	ListSilences(filter []string) (apimodels.GettableSilences, error)
+
+	// Alerts
+	GetAlerts(active, silenced, inhibited bool, filter []string, receiver string) (apimodels.GettableAlerts, error)
+	GetAlertGroups(active, silenced, inhibited bool, filter []string, receiver string) (apimodels.AlertGroups, error)
 }
 
 // API handlers.

pkg/services/ngalert/api/api_alertmanager.go

@@ -4,11 +4,9 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
-	"time"
 
 	"gopkg.in/yaml.v3"
 
-	"github.com/go-openapi/strfmt"
 	apimodels "github.com/grafana/alerting-api/pkg/api"
 	"github.com/grafana/grafana/pkg/api/response"
 	"github.com/grafana/grafana/pkg/infra/log"
@@ -17,7 +15,6 @@ import (
 	"github.com/grafana/grafana/pkg/services/ngalert/notifier"
 	"github.com/grafana/grafana/pkg/services/ngalert/store"
 	"github.com/grafana/grafana/pkg/util"
-	amv2 "github.com/prometheus/alertmanager/api/v2/models"
 )
 
 type AlertmanagerSrv struct {
@@ -118,193 +115,41 @@ func (srv AlertmanagerSrv) RouteGetAlertingConfig(c *models.ReqContext) response
 }
 
 func (srv AlertmanagerSrv) RouteGetAMAlertGroups(c *models.ReqContext) response.Response {
-	recipient := c.Params(":Recipient")
-	srv.log.Info("RouteGetAMAlertGroups: ", "Recipient", recipient)
-	now := time.Now()
-	result := apimodels.AlertGroups{
-		&amv2.AlertGroup{
-			Alerts: []*amv2.GettableAlert{
-				{
-					Annotations: amv2.LabelSet{
-						"annotation1-1": "value1",
-						"annotation1-2": "value2",
-					},
-					EndsAt:      timePtr(strfmt.DateTime(now.Add(time.Hour))),
-					Fingerprint: stringPtr("fingerprint 1"),
-					Receivers: []*amv2.Receiver{
-						{
-							Name: stringPtr("receiver identifier 1-1"),
-						},
-						{
-							Name: stringPtr("receiver identifier 1-2"),
-						},
-					},
-					StartsAt: timePtr(strfmt.DateTime(now)),
-					Status: &amv2.AlertStatus{
-						InhibitedBy: []string{"inhibitedBy 1"},
-						SilencedBy:  []string{"silencedBy 1"},
-						State:       stringPtr(amv2.AlertStatusStateActive),
-					},
-					UpdatedAt: timePtr(strfmt.DateTime(now.Add(-time.Hour))),
-					Alert: amv2.Alert{
-						GeneratorURL: strfmt.URI("a URL"),
-						Labels: amv2.LabelSet{
-							"label1-1": "value1",
-							"label1-2": "value2",
-						},
-					},
-				},
-				{
-					Annotations: amv2.LabelSet{
-						"annotation2-1": "value1",
-						"annotation2-2": "value2",
-					},
-					EndsAt:      timePtr(strfmt.DateTime(now.Add(time.Hour))),
-					Fingerprint: stringPtr("fingerprint 2"),
-					Receivers: []*amv2.Receiver{
-						{
-							Name: stringPtr("receiver identifier 2-1"),
-						},
-						{
-							Name: stringPtr("receiver identifier 2-2"),
-						},
-					},
-					StartsAt: timePtr(strfmt.DateTime(now)),
-					Status: &amv2.AlertStatus{
-						InhibitedBy: []string{"inhibitedBy 2"},
-						SilencedBy:  []string{"silencedBy 2"},
-						State:       stringPtr(amv2.AlertStatusStateActive),
-					},
-					UpdatedAt: timePtr(strfmt.DateTime(now.Add(-time.Hour))),
-					Alert: amv2.Alert{
-						GeneratorURL: strfmt.URI("a URL"),
-						Labels: amv2.LabelSet{
-							"label2-1": "value1",
-							"label2-2": "value2",
-						},
-					},
-				},
-			},
-			Labels: amv2.LabelSet{
-				"label1-1": "value1",
-				"label1-2": "value2",
-			},
-			Receiver: &amv2.Receiver{
-				Name: stringPtr("receiver identifier 2-1"),
-			},
-		},
-		&amv2.AlertGroup{
-			Alerts: []*amv2.GettableAlert{
-				{
-					Annotations: amv2.LabelSet{
-						"annotation2-1": "value1",
-						"annotation2-2": "value2",
-					},
-					EndsAt:      timePtr(strfmt.DateTime(now.Add(time.Hour))),
-					Fingerprint: stringPtr("fingerprint 2"),
-					Receivers: []*amv2.Receiver{
-						{
-							Name: stringPtr("receiver identifier 2-1"),
-						},
-						{
-							Name: stringPtr("receiver identifier 2-2"),
-						},
-					},
-					StartsAt: timePtr(strfmt.DateTime(now)),
-					Status: &amv2.AlertStatus{
-						InhibitedBy: []string{"inhibitedBy 2"},
-						SilencedBy:  []string{"silencedBy 2"},
-						State:       stringPtr(amv2.AlertStatusStateActive),
-					},
-					UpdatedAt: timePtr(strfmt.DateTime(now.Add(-time.Hour))),
-					Alert: amv2.Alert{
-						GeneratorURL: strfmt.URI("a URL"),
-						Labels: amv2.LabelSet{
-							"label2-1": "value1",
-							"label2-2": "value2",
-						},
-					},
-				},
-			},
-			Labels: amv2.LabelSet{
-				"label2-1": "value1",
-				"label2-2": "value2",
-			},
-			Receiver: &amv2.Receiver{
-				Name: stringPtr("receiver identifier 2-1"),
-			},
-		},
+	groups, err := srv.am.GetAlertGroups(
+		c.QueryBool("active"),
+		c.QueryBool("silenced"),
+		c.QueryBool("inhibited"),
+		c.QueryStrings("filter"),
+		c.Query("receiver"),
+	)
+	if err != nil {
+		if errors.Is(err, notifier.ErrGetAlertGroupsBadPayload) {
+			return response.Error(http.StatusBadRequest, err.Error(), nil)
+		}
+		// any other error here should be an unexpected failure and thus an internal error
+		return response.Error(http.StatusInternalServerError, err.Error(), nil)
 	}
-	return response.JSON(http.StatusOK, result)
+
+	return response.JSON(http.StatusOK, groups)
 }
 
 func (srv AlertmanagerSrv) RouteGetAMAlerts(c *models.ReqContext) response.Response {
-	recipient := c.Params(":Recipient")
-	srv.log.Info("RouteGetAMAlerts: ", "Recipient", recipient)
-	now := time.Now()
-	result := apimodels.GettableAlerts{
-		&amv2.GettableAlert{
-			Annotations: amv2.LabelSet{
-				"annotation1-1": "value1",
-				"annotation1-2": "value2",
-			},
-			EndsAt:      timePtr(strfmt.DateTime(now.Add(time.Hour))),
-			Fingerprint: stringPtr("fingerprint 1"),
-			Receivers: []*amv2.Receiver{
-				{
-					Name: stringPtr("receiver identifier 1-1"),
-				},
-				{
-					Name: stringPtr("receiver identifier 1-2"),
-				},
-			},
-			StartsAt: timePtr(strfmt.DateTime(now)),
-			Status: &amv2.AlertStatus{
-				InhibitedBy: []string{"inhibitedBy 1"},
-				SilencedBy:  []string{"silencedBy 1"},
-				State:       stringPtr(amv2.AlertStatusStateActive),
-			},
-			UpdatedAt: timePtr(strfmt.DateTime(now.Add(-time.Hour))),
-			Alert: amv2.Alert{
-				GeneratorURL: strfmt.URI("a URL"),
-				Labels: amv2.LabelSet{
-					"label1-1": "value1",
-					"label1-2": "value2",
-				},
-			},
-		},
-		&amv2.GettableAlert{
-			Annotations: amv2.LabelSet{
-				"annotation2-1": "value1",
-				"annotation2-2": "value2",
-			},
-			EndsAt:      timePtr(strfmt.DateTime(now.Add(time.Hour))),
-			Fingerprint: stringPtr("fingerprint 2"),
-			Receivers: []*amv2.Receiver{
-				{
-					Name: stringPtr("receiver identifier 2-1"),
-				},
-				{
-					Name: stringPtr("receiver identifier 2-2"),
-				},
-			},
-			StartsAt: timePtr(strfmt.DateTime(now)),
-			Status: &amv2.AlertStatus{
-				InhibitedBy: []string{"inhibitedBy 2"},
-				SilencedBy:  []string{"silencedBy 2"},
-				State:       stringPtr(amv2.AlertStatusStateActive),
-			},
-			UpdatedAt: timePtr(strfmt.DateTime(now.Add(-time.Hour))),
-			Alert: amv2.Alert{
-				GeneratorURL: strfmt.URI("a URL"),
-				Labels: amv2.LabelSet{
-					"label2-1": "value1",
-					"label2-2": "value2",
-				},
-			},
-		},
+	alerts, err := srv.am.GetAlerts(
+		c.QueryBool("active"),
+		c.QueryBool("silenced"),
+		c.QueryBool("inhibited"),
+		c.QueryStrings("filter"),
+		c.Query("receiver"),
+	)
+	if err != nil {
+		if errors.Is(err, notifier.ErrGetAlertsBadPayload) {
+			return response.Error(http.StatusBadRequest, err.Error(), nil)
+		}
+		// any other error here should be an unexpected failure and thus an internal error
+		return response.Error(http.StatusInternalServerError, err.Error(), nil)
 	}
-	return response.JSON(http.StatusOK, result)
+
+	return response.JSON(http.StatusOK, alerts)
 }
 
 func (srv AlertmanagerSrv) RouteGetSilence(c *models.ReqContext) response.Response {
@@ -321,8 +166,7 @@ func (srv AlertmanagerSrv) RouteGetSilence(c *models.ReqContext) response.Respon
 }
 
 func (srv AlertmanagerSrv) RouteGetSilences(c *models.ReqContext) response.Response {
-	filters := c.QueryStrings("Filter")
-	gettableSilences, err := srv.am.ListSilences(filters)
+	gettableSilences, err := srv.am.ListSilences(c.QueryStrings("filter"))
 	if err != nil {
 		if errors.Is(err, notifier.ErrListSilencesBadPayload) {
 			return response.Error(http.StatusBadRequest, err.Error(), nil)

pkg/services/ngalert/api/test-data/am-alertmanager-recipient.http

@@ -97,6 +97,10 @@ content-type: application/json
 # get AM alerts
 GET http://admin:admin@localhost:3000/api/alertmanager/{{alertManagerDatasourceID}}/api/v2/alerts
 
+###
+# get AM alert groups
+GET http://admin:admin@localhost:3000/alertmanager/{{alertManagerDatasourceID}}/api/v2/alerts/groups
+
 ###
 # get silences - no silences
 GET http://admin:admin@localhost:3000/api/alertmanager/{{alertManagerDatasourceID}}/api/v2/silences?Filter=foo="bar"&Filter=bar="foo"
@@ -164,4 +168,4 @@ DELETE http://admin:admin@localhost:3000/api/alertmanager/{{alertManagerDatasour
 
 ###
 # delete silence - unknown
-DELETE http://admin:admin@localhost:3000/api/alertmanager/{{alertManagerDatasourceID}}/api/v2/silence/unknown
+DELETE http://admin:admin@localhost:3000/api/alertmanager/{{alertManagerDatasourceID}}/api/v2/silence/unknown

pkg/services/ngalert/api/util.go

@@ -11,7 +11,6 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/go-openapi/strfmt"
 	apimodels "github.com/grafana/alerting-api/pkg/api"
 	"github.com/grafana/grafana/pkg/api/response"
 	"github.com/grafana/grafana/pkg/models"
@@ -30,14 +29,6 @@ func toMacaronPath(path string) string {
 	}))
 }
 
-func timePtr(t strfmt.DateTime) *strfmt.DateTime {
-	return &t
-}
-
-func stringPtr(s string) *string {
-	return &s
-}
-
 func backendType(ctx *models.ReqContext, cache datasources.CacheService) (apimodels.Backend, error) {
 	recipient := ctx.Params("Recipient")
 	if recipient == apimodels.GrafanaBackend.String() {

pkg/services/ngalert/notifier/alertmanager.go

@@ -48,17 +48,18 @@ type Alertmanager struct {
 	// notificationLog keeps tracks of which notifications we've fired already.
 	notificationLog *nflog.Log
 	// silences keeps the track of which notifications we should not fire due to user configuration.
-	silences *silence.Silences
-	marker   types.Marker
-	alerts   *AlertProvider
-
+	silencer     *silence.Silencer
+	silences     *silence.Silences
+	marker       types.Marker
+	alerts       *AlertProvider
+	route        *dispatch.Route
 	dispatcher   *dispatch.Dispatcher
 	dispatcherWG sync.WaitGroup
 
 	stageMetrics      *notify.Metrics
 	dispatcherMetrics *dispatch.DispatcherMetrics
 
-	reloadConfigMtx sync.Mutex
+	reloadConfigMtx sync.RWMutex
 }
 
 func init() {
@@ -194,7 +195,8 @@ func (am *Alertmanager) applyConfig(cfg *api.PostableUserConfig) error {
 	// Now, let's put together our notification pipeline
 	routingStage := make(notify.RoutingStage, len(integrationsMap))
 
-	silencingStage := notify.NewMuteStage(silence.NewSilencer(am.silences, am.marker, gokit_log.NewNopLogger()))
+	am.silencer = silence.NewSilencer(am.silences, am.marker, gokit_log.NewNopLogger())
+	silencingStage := notify.NewMuteStage(am.silencer)
 	for name := range integrationsMap {
 		stage := am.createReceiverStage(name, integrationsMap[name], waitFunc, am.notificationLog)
 		routingStage[name] = notify.MultiStage{silencingStage, stage}
@@ -203,9 +205,8 @@ func (am *Alertmanager) applyConfig(cfg *api.PostableUserConfig) error {
 	am.alerts.SetStage(routingStage)
 
 	am.StopAndWait()
-	//TODO: Verify this is correct
-	route := dispatch.NewRoute(cfg.AlertmanagerConfig.Route, nil)
-	am.dispatcher = dispatch.NewDispatcher(am.alerts, route, routingStage, am.marker, timeoutFunc, gokit_log.NewNopLogger(), am.dispatcherMetrics)
+	am.route = dispatch.NewRoute(cfg.AlertmanagerConfig.Route, nil)
+	am.dispatcher = dispatch.NewDispatcher(am.alerts, am.route, routingStage, am.marker, timeoutFunc, gokit_log.NewNopLogger(), am.dispatcherMetrics)
 
 	am.dispatcherWG.Add(1)
 	go func() {
@@ -285,7 +286,6 @@ func (am *Alertmanager) createReceiverStage(name string, integrations []notify.I
 		var s notify.MultiStage
 		s = append(s, notify.NewWaitStage(wait))
 		s = append(s, notify.NewDedupStage(&integrations[i], notificationLog, recv))
-		//TODO: This probably won't work w/o the metrics
 		s = append(s, notify.NewRetryStage(integrations[i], name, am.stageMetrics))
 		s = append(s, notify.NewSetNotifiesStage(notificationLog, recv))
 

pkg/services/ngalert/notifier/alerts.go

@@ -0,0 +1,222 @@
+package notifier
+
+import (
+	"regexp"
+	"sort"
+	"time"
+
+	apimodels "github.com/grafana/alerting-api/pkg/api"
+	"github.com/pkg/errors"
+	v2 "github.com/prometheus/alertmanager/api/v2"
+	"github.com/prometheus/alertmanager/dispatch"
+	"github.com/prometheus/alertmanager/pkg/labels"
+	"github.com/prometheus/alertmanager/types"
+	prometheus_model "github.com/prometheus/common/model"
+)
+
+var (
+	ErrGetAlertsInternal        = errors.New("unable to retrieve alerts(s) due to an internal error")
+	ErrGetAlertsBadPayload      = errors.New("unable to retrieve alerts")
+	ErrGetAlertGroupsBadPayload = errors.New("unable to retrieve alerts groups")
+)
+
+func (am *Alertmanager) GetAlerts(active, silenced, inhibited bool, filter []string, receivers string) (apimodels.GettableAlerts, error) {
+	var (
+		// Initialize result slice to prevent api returning `null` when there
+		// are no alerts present
+		res = apimodels.GettableAlerts{}
+	)
+
+	matchers, err := parseFilter(filter)
+	if err != nil {
+		am.logger.Error("failed to parse matchers", "err", err)
+		return nil, errors.Wrap(ErrGetAlertsBadPayload, err.Error())
+	}
+
+	receiverFilter, err := parseReceivers(receivers)
+	if err != nil {
+		am.logger.Error("failed to parse receiver regex", "err", err)
+		return nil, errors.Wrap(ErrGetAlertsBadPayload, err.Error())
+	}
+
+	alerts := am.alerts.GetPending()
+	defer alerts.Close()
+
+	alertFilter := am.alertFilter(matchers, silenced, inhibited, active)
+	now := time.Now()
+
+	am.reloadConfigMtx.RLock()
+	for a := range alerts.Next() {
+		if err = alerts.Err(); err != nil {
+			break
+		}
+
+		routes := am.route.Match(a.Labels)
+		receivers := make([]string, 0, len(routes))
+		for _, r := range routes {
+			receivers = append(receivers, r.RouteOpts.Receiver)
+		}
+
+		if receiverFilter != nil && !receiversMatchFilter(receivers, receiverFilter) {
+			continue
+		}
+
+		if !alertFilter(a, now) {
+			continue
+		}
+
+		alert := v2.AlertToOpenAPIAlert(a, am.marker.Status(a.Fingerprint()), receivers)
+
+		res = append(res, alert)
+	}
+	am.reloadConfigMtx.RUnlock()
+
+	if err != nil {
+		am.logger.Error("failed to iterate through the alerts", "err", err)
+		return nil, errors.Wrap(ErrGetAlertsInternal, err.Error())
+	}
+	sort.Slice(res, func(i, j int) bool {
+		return *res[i].Fingerprint < *res[j].Fingerprint
+	})
+
+	return res, nil
+}
+
+func (am *Alertmanager) GetAlertGroups(active, silenced, inhibited bool, filter []string, receivers string) (apimodels.AlertGroups, error) {
+	matchers, err := parseFilter(filter)
+	if err != nil {
+		am.logger.Error("msg", "failed to parse matchers", "err", err)
+		return nil, errors.Wrap(ErrGetAlertGroupsBadPayload, err.Error())
+	}
+
+	receiverFilter, err := parseReceivers(receivers)
+	if err != nil {
+		am.logger.Error("msg", "failed to compile receiver regex", "err", err)
+		return nil, errors.Wrap(ErrGetAlertGroupsBadPayload, err.Error())
+	}
+
+	rf := func(receiverFilter *regexp.Regexp) func(r *dispatch.Route) bool {
+		return func(r *dispatch.Route) bool {
+			receiver := r.RouteOpts.Receiver
+			if receiverFilter != nil && !receiverFilter.MatchString(receiver) {
+				return false
+			}
+			return true
+		}
+	}(receiverFilter)
+
+	af := am.alertFilter(matchers, silenced, inhibited, active)
+	alertGroups, allReceivers := am.dispatcher.Groups(rf, af)
+
+	res := make(apimodels.AlertGroups, 0, len(alertGroups))
+
+	for _, alertGroup := range alertGroups {
+		ag := &apimodels.AlertGroup{
+			Receiver: &apimodels.Receiver{Name: &alertGroup.Receiver},
+			Labels:   v2.ModelLabelSetToAPILabelSet(alertGroup.Labels),
+			Alerts:   make([]*apimodels.GettableAlert, 0, len(alertGroup.Alerts)),
+		}
+
+		for _, alert := range alertGroup.Alerts {
+			fp := alert.Fingerprint()
+			receivers := allReceivers[fp]
+			status := am.marker.Status(fp)
+			apiAlert := v2.AlertToOpenAPIAlert(alert, status, receivers)
+			ag.Alerts = append(ag.Alerts, apiAlert)
+		}
+		res = append(res, ag)
+	}
+
+	return res, nil
+}
+
+func (am *Alertmanager) alertFilter(matchers []*labels.Matcher, silenced, inhibited, active bool) func(a *types.Alert, now time.Time) bool {
+	return func(a *types.Alert, now time.Time) bool {
+		if !a.EndsAt.IsZero() && a.EndsAt.Before(now) {
+			return false
+		}
+
+		// Set alert's current status based on its label set.
+		am.silencer.Mutes(a.Labels)
+
+		// Get alert's current status after seeing if it is suppressed.
+		status := am.marker.Status(a.Fingerprint())
+
+		if !active && status.State == types.AlertStateActive {
+			return false
+		}
+
+		if !silenced && len(status.SilencedBy) != 0 {
+			return false
+		}
+
+		if !inhibited && len(status.InhibitedBy) != 0 {
+			return false
+		}
+
+		return alertMatchesFilterLabels(&a.Alert, matchers)
+	}
+}
+
+func alertMatchesFilterLabels(a *prometheus_model.Alert, matchers []*labels.Matcher) bool {
+	sms := make(map[string]string)
+	for name, value := range a.Labels {
+		sms[string(name)] = string(value)
+	}
+	return matchFilterLabels(matchers, sms)
+}
+
+func matchFilterLabels(matchers []*labels.Matcher, sms map[string]string) bool {
+	for _, m := range matchers {
+		v, prs := sms[m.Name]
+		switch m.Type {
+		case labels.MatchNotRegexp, labels.MatchNotEqual:
+			if m.Value == "" && prs {
+				continue
+			}
+			if !m.Matches(v) {
+				return false
+			}
+		default:
+			if m.Value == "" && !prs {
+				continue
+			}
+			if !m.Matches(v) {
+				return false
+			}
+		}
+	}
+
+	return true
+}
+
+func parseReceivers(receivers string) (*regexp.Regexp, error) {
+	if receivers == "" {
+		return nil, nil
+	}
+
+	return regexp.Compile("^(?:" + receivers + ")$")
+}
+
+func parseFilter(filter []string) ([]*labels.Matcher, error) {
+	matchers := make([]*labels.Matcher, 0, len(filter))
+	for _, matcherString := range filter {
+		matcher, err := labels.ParseMatcher(matcherString)
+		if err != nil {
+			return nil, err
+		}
+
+		matchers = append(matchers, matcher)
+	}
+	return matchers, nil
+}
+
+func receiversMatchFilter(receivers []string, filter *regexp.Regexp) bool {
+	for _, r := range receivers {
+		if filter.MatchString(r) {
+			return true
+		}
+	}
+
+	return false
+}

pkg/services/ngalert/notifier/silences.go

@@ -7,7 +7,6 @@ import (
 	apimodels "github.com/grafana/alerting-api/pkg/api"
 	"github.com/pkg/errors"
 	v2 "github.com/prometheus/alertmanager/api/v2"
-	"github.com/prometheus/alertmanager/pkg/labels"
 	"github.com/prometheus/alertmanager/silence"
 )
 
@@ -20,16 +19,11 @@ var (
 )
 
 // ListSilences retrieves a list of stored silences. It supports a set of labels as filters.
-func (am *Alertmanager) ListSilences(filters []string) (apimodels.GettableSilences, error) {
-	matchers := []*labels.Matcher{}
-	for _, matcherString := range filters {
-		matcher, err := labels.ParseMatcher(matcherString)
-		if err != nil {
-			am.logger.Error("failed to parse matcher", "err", err, "matcher", matcherString)
-			return nil, errors.Wrap(ErrListSilencesBadPayload, err.Error())
-		}
-
-		matchers = append(matchers, matcher)
+func (am *Alertmanager) ListSilences(filter []string) (apimodels.GettableSilences, error) {
+	matchers, err := parseFilter(filter)
+	if err != nil {
+		am.logger.Error("failed to parse matchers", "err", err)
+		return nil, errors.Wrap(ErrListSilencesBadPayload, err.Error())
 	}
 
 	psils, _, err := am.silences.Query()

pkg/tests/api/alerting/api_alertmanager_test.go

@@ -0,0 +1,132 @@
+package alerting
+
+import (
+	"context"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/grafana/grafana/pkg/services/ngalert/models"
+	"github.com/grafana/grafana/pkg/services/sqlstore"
+
+	"github.com/grafana/grafana/pkg/tests/testinfra"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAlertAndGroupsQuery(t *testing.T) {
+	dir, path := testinfra.CreateGrafDir(t, testinfra.GrafanaOpts{
+		EnableFeatureToggles: []string{"ngalert"},
+	})
+	store := setupDB(t, dir)
+	grafanaListedAddr := testinfra.StartGrafana(t, dir, path, store)
+
+	// When there are no alerts available, it returns an empty list.
+	{
+		alertsURL := fmt.Sprintf("http://%s/api/alertmanager/grafana/api/v2/alerts", grafanaListedAddr)
+		// nolint:gosec
+		resp, err := http.Get(alertsURL)
+		require.NoError(t, err)
+		t.Cleanup(func() {
+			err := resp.Body.Close()
+			require.NoError(t, err)
+		})
+		b, err := ioutil.ReadAll(resp.Body)
+		require.NoError(t, err)
+		require.Equal(t, 200, resp.StatusCode)
+		require.JSONEq(t, "[]", string(b))
+	}
+
+	// When are there no alerts available, it returns an empty list of groups.
+	{
+		alertsURL := fmt.Sprintf("http://%s/api/alertmanager/grafana/api/v2/alerts/groups", grafanaListedAddr)
+		// nolint:gosec
+		resp, err := http.Get(alertsURL)
+		require.NoError(t, err)
+		t.Cleanup(func() {
+			err := resp.Body.Close()
+			require.NoError(t, err)
+		})
+		b, err := ioutil.ReadAll(resp.Body)
+		require.NoError(t, err)
+		require.NoError(t, err)
+		require.Equal(t, 200, resp.StatusCode)
+		require.JSONEq(t, "[]", string(b))
+	}
+}
+
+func setupDB(t *testing.T, dir string) *sqlstore.SQLStore {
+	store := testinfra.SetUpDatabase(t, dir)
+	// Let's make sure we create a default configuration from which we can start.
+	err := store.WithDbSession(context.Background(), func(sess *sqlstore.DBSession) error {
+		_, err := sess.Insert(&models.AlertConfiguration{
+			ID:                        1,
+			AlertmanagerConfiguration: AMConfigFixture,
+			ConfigurationVersion:      "v1",
+			CreatedAt:                 time.Now(),
+		})
+		return err
+	})
+	require.NoError(t, err)
+
+	return store
+}
+
+var AMConfigFixture = `
+{
+  "template_files": {},
+  "alertmanager_config": {
+    "global": {
+      "resolve_timeout": "4m",
+      "http_config": {
+        "BasicAuth": null,
+        "Authorization": null,
+        "BearerToken": "",
+        "BearerTokenFile": "",
+        "ProxyURL": {},
+        "TLSConfig": {
+          "CAFile": "",
+          "CertFile": "",
+          "KeyFile": "",
+          "ServerName": "",
+          "InsecureSkipVerify": false
+        },
+        "FollowRedirects": true
+      },
+      "smtp_from": "youraddress@example.org",
+      "smtp_hello": "localhost",
+      "smtp_smarthost": "localhost:25",
+      "smtp_require_tls": true,
+      "pagerduty_url": "https://events.pagerduty.com/v2/enqueue",
+      "opsgenie_api_url": "https://api.opsgenie.com/",
+      "wechat_api_url": "https://qyapi.weixin.qq.com/cgi-bin/",
+      "victorops_api_url": "https://alert.victorops.com/integrations/generic/20131114/alert/"
+    },
+    "route": {
+      "receiver": "example-email"
+    },
+    "templates": [],
+    "receivers": [
+      {
+        "name": "example-email",
+        "email_configs": [
+          {
+            "send_resolved": false,
+            "to": "youraddress@example.org",
+            "smarthost": "",
+            "html": "{{ template \"email.default.html\" . }}",
+            "tls_config": {
+              "CAFile": "",
+              "CertFile": "",
+              "KeyFile": "",
+              "ServerName": "",
+              "InsecureSkipVerify": false
+            }
+          }
+        ]
+      }
+    ]
+  }
+}
+`

pkg/tests/testinfra/testinfra.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 
 	"github.com/grafana/grafana/pkg/infra/fs"
@@ -195,6 +196,12 @@ func CreateGrafDir(t *testing.T, opts ...GrafanaOpts) (string, string) {
 			_, err = securitySect.NewKey("content_security_policy", "true")
 			require.NoError(t, err)
 		}
+		if len(o.EnableFeatureToggles) > 0 {
+			featureSection, err := cfg.NewSection("feature_toggles")
+			require.NoError(t, err)
+			_, err = featureSection.NewKey("enable", strings.Join(o.EnableFeatureToggles, " "))
+			require.NoError(t, err)
+		}
 	}
 
 	cfgPath := filepath.Join(cfgDir, "test.ini")
@@ -208,5 +215,6 @@ func CreateGrafDir(t *testing.T, opts ...GrafanaOpts) (string, string) {
 }
 
 type GrafanaOpts struct {
-	EnableCSP bool
+	EnableCSP            bool
+	EnableFeatureToggles []string
 }