Update alertmanager (#3903)

* Update Alertmanager dependency to master

The biggest changes are time-based muting and the inclusion of
interfaces for the clustering logic.

The latter supports the Alertmanager replication via the ring.

Signed-off-by: gotjosh <josue@grafana.com>

* Use NilPeer for the API clustering interface.

We don't want to expose information about the cluster back to tenants.

Signed-off-by: gotjosh <josue@grafana.com>

* gofmt fails me

Signed-off-by: gotjosh <josue@grafana.com>

Author: gotjosh

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## master / unreleased
 
+* [CHANGE] Alertmanager: Don't expose cluster information to tenants via the `/alertmanager/api/v1/status` API endpoint when operating with clustering enabled.
 * [CHANGE] Ingester: don't update internal "last updated" timestamp of TSDB if tenant only sends invalid samples. This affects how "idle" time is computed. #3727
 * [CHANGE] Require explicit flag `-<prefix>.tls-enabled` to enable TLS in GRPC clients. Previously it was enough to specify a TLS flag to enable TLS validation. #3156
 * [CHANGE] Query-frontend: removed `-querier.split-queries-by-day` (deprecated in Cortex 0.4.0). You should use `-querier.split-queries-by-interval` instead. #3813

go.mod

@@ -43,10 +43,10 @@ require (
 	github.com/opentracing-contrib/go-stdlib v1.0.0
 	github.com/opentracing/opentracing-go v1.2.0
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/alertmanager v0.21.1-0.20201106142418-c39b78780054
+	github.com/prometheus/alertmanager v0.21.1-0.20210303154452-7866b9bb0927
 	github.com/prometheus/client_golang v1.9.0
 	github.com/prometheus/client_model v0.2.0
-	github.com/prometheus/common v0.15.0
+	github.com/prometheus/common v0.18.0
 	github.com/prometheus/prometheus v1.8.2-0.20210215121130-6f488061dfb4
 	github.com/segmentio/fasthash v0.0.0-20180216231524-a72b379d632e
 	github.com/sony/gobreaker v0.4.1

go.sum

@@ -1087,6 +1087,8 @@ github.com/prometheus/alertmanager v0.21.0/go.mod h1:h7tJ81NA0VLWvWEayi1QltevFkL
 github.com/prometheus/alertmanager v0.21.1-0.20200911160112-1fdff6b3f939/go.mod h1:imXRHOP6QTsE0fFsIsAV/cXimS32m7gVZOiUj11m6Ig=
 github.com/prometheus/alertmanager v0.21.1-0.20201106142418-c39b78780054 h1:NgCRBfzDpyIhX6Pjh7XSWPHUC8T5dA1yVuK/gwXM7Jw=
 github.com/prometheus/alertmanager v0.21.1-0.20201106142418-c39b78780054/go.mod h1:imXRHOP6QTsE0fFsIsAV/cXimS32m7gVZOiUj11m6Ig=
+github.com/prometheus/alertmanager v0.21.1-0.20210303154452-7866b9bb0927 h1:BLdqq8kRvpCWghcXjU32mi4pzJlyo8InM5hfmIqFyoc=
+github.com/prometheus/alertmanager v0.21.1-0.20210303154452-7866b9bb0927/go.mod h1:MTqVn+vIupE0dzdgo+sMcNCp37SCAi8vPrvKTTnTz9g=
 github.com/prometheus/client_golang v0.8.0/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v0.9.2/go.mod h1:OsXs2jCmiKlQ1lTBmv21f2mNfw4xf/QclQDMrYNZzcM=
@@ -1133,6 +1135,9 @@ github.com/prometheus/common v0.14.0 h1:RHRyE8UocrbjU+6UvRzwi6HjiDfxrrBU91TtbKzk
 github.com/prometheus/common v0.14.0/go.mod h1:U+gB1OBLb1lF3O42bTCL+FK18tX9Oar16Clt/msog/s=
 github.com/prometheus/common v0.15.0 h1:4fgOnadei3EZvgRwxJ7RMpG1k1pOZth5Pc13tyspaKM=
 github.com/prometheus/common v0.15.0/go.mod h1:U+gB1OBLb1lF3O42bTCL+FK18tX9Oar16Clt/msog/s=
+github.com/prometheus/common v0.18.0 h1:WCVKW7aL6LEe1uryfI9dnEc2ZqNB1Fn0ok930v0iL1Y=
+github.com/prometheus/common v0.18.0/go.mod h1:U+gB1OBLb1lF3O42bTCL+FK18tX9Oar16Clt/msog/s=
+github.com/prometheus/exporter-toolkit v0.5.0/go.mod h1:OCkM4805mmisBhLmVFw858QYi3v0wKdY6/UxrT0pZVg=
 github.com/prometheus/exporter-toolkit v0.5.1/go.mod h1:OCkM4805mmisBhLmVFw858QYi3v0wKdY6/UxrT0pZVg=
 github.com/prometheus/node_exporter v1.0.0-rc.0.0.20200428091818-01054558c289 h1:dTUS1vaLWq+Y6XKOTnrFpoVsQKLCbCp1OLj24TDi7oM=
 github.com/prometheus/node_exporter v1.0.0-rc.0.0.20200428091818-01054558c289/go.mod h1:FGbBv5OPKjch+jNUJmEQpMZytIdyW0NdBtWFcfSKusc=

pkg/alertmanager/alertmanager.go

@@ -32,6 +32,7 @@ import (
 	"github.com/prometheus/alertmanager/provider/mem"
 	"github.com/prometheus/alertmanager/silence"
 	"github.com/prometheus/alertmanager/template"
+	"github.com/prometheus/alertmanager/timeinterval"
 	"github.com/prometheus/alertmanager/types"
 	"github.com/prometheus/alertmanager/ui"
 	"github.com/prometheus/client_golang/prometheus"
@@ -161,7 +162,7 @@ func New(cfg *Config, reg *prometheus.Registry) (*Alertmanager, error) {
 		Alerts:     am.alerts,
 		Silences:   am.silences,
 		StatusFunc: am.marker.Status,
-		Peer:       cfg.Peer,
+		Peer:       &NilPeer{},
 		Registry:   am.registry,
 		Logger:     log.With(am.logger, "component", "api"),
 		GroupFunc: func(f1 func(*dispatch.Route) bool, f2 func(*types.Alert, time.Time) bool) (dispatch.AlertGroups, map[model.Fingerprint][]string) {
@@ -242,11 +243,17 @@ func (am *Alertmanager) ApplyConfig(userID string, conf *config.Config, rawCfg s
 		return nil
 	}
 
+	muteTimes := make(map[string][]timeinterval.TimeInterval, len(conf.MuteTimeIntervals))
+	for _, ti := range conf.MuteTimeIntervals {
+		muteTimes[ti.Name] = ti.TimeIntervals
+	}
+
 	pipeline := am.pipelineBuilder.New(
 		integrationsMap,
 		waitFunc,
 		am.inhibitor,
 		silence.NewSilencer(am.silences, am.marker, am.logger),
+		muteTimes,
 		am.nflog,
 		am.cfg.Peer,
 	)
@@ -355,3 +362,20 @@ func md5HashAsMetricValue(data []byte) float64 {
 	copy(bytes, smallSum)
 	return float64(binary.LittleEndian.Uint64(bytes))
 }
+
+// NilPeer and NilChannel implements the Alertmanager clustering interface used by the API to expose cluster information.
+// In a multi-tenant environment, we choose not to expose these to tenants and thus are not implemented.
+type NilPeer struct{}
+
+func (p *NilPeer) Name() string                   { return "" }
+func (p *NilPeer) Status() string                 { return "ready" }
+func (p *NilPeer) Peers() []cluster.ClusterMember { return nil }
+func (p *NilPeer) Position() int                  { return 0 }
+func (p *NilPeer) WaitReady()                     {}
+func (p *NilPeer) AddState(string, cluster.State, prometheus.Registerer) cluster.ClusterChannel {
+	return &NilChannel{}
+}
+
+type NilChannel struct{}
+
+func (c *NilChannel) Broadcast([]byte) {}