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Merged
SoloJacobs merged 6 commits into from
Sep 16, 2026
Merged

Prepare 0.34.1 #5556

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1e59265
chore(deps): bump golang.org/x/mod from v0.38.0 to v0.40.0 (#5468)
Mostafa-Yehia Aug 25, 2026
d7545d6
update inhibitor index to store all matched alerts (#5542)
Spaceman1701 Sep 8, 2026
c88d43a
inhibit: add tests for source alerts sharing equal labels (#5449)
sueun-dev Sep 14, 2026
b83d831
inhibitor: merge cache and index so there's only one lock (#5559)
Spaceman1701 Sep 16, 2026
b373ee4
update VERSION and CHANGELOG
Spaceman1701 Sep 11, 2026
bf17433
chore(deps): bump google.golang.org/grpc from v1.82.1 to v1.83.1
SoloJacobs Sep 16, 2026
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4 changes: 4 additions & 0 deletions CHANGELOG.md
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@@ -1,5 +1,9 @@
## main / (unreleased)

## 0.34.1 / 2026-09-11

* [BUGFIX] inhibit: Fix several issues related to inhibitions that caused alerts to be improperly un-muted in some cases. #5542, #5449, #5559

## 0.34.0 / 2026-08-16

* [CHANGE] notify: The `reason` label on `alertmanager_notifications_failed_total` now distinguishes `authError` (HTTP 401/403) and `rateLimited` (HTTP 429) from the generic `clientError`. Dashboards/alerts matching `reason="clientError"` for these codes must be updated. #5332
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2 changes: 1 addition & 1 deletion VERSION
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@@ -1 +1 @@
0.34.0
0.34.1
12 changes: 6 additions & 6 deletions go.mod
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Expand Up @@ -54,10 +54,10 @@ require (
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.44.0
go.opentelemetry.io/otel/sdk v1.44.0
go.opentelemetry.io/otel/trace v1.44.0
golang.org/x/mod v0.38.0
golang.org/x/net v0.57.0
golang.org/x/text v0.40.0
google.golang.org/grpc v1.82.1
golang.org/x/mod v0.40.0
golang.org/x/net v0.58.0
golang.org/x/text v0.41.0
google.golang.org/grpc v1.83.1
google.golang.org/protobuf v1.36.11
gopkg.in/telebot.v3 v3.3.8
gopkg.in/yaml.v2 v2.4.0
Expand Down Expand Up @@ -124,12 +124,12 @@ require (
go.opentelemetry.io/proto/otlp v1.10.0 // indirect
go.yaml.in/yaml/v2 v2.4.4 // indirect
go.yaml.in/yaml/v3 v3.0.4 // indirect
golang.org/x/crypto v0.54.0 // indirect
golang.org/x/crypto v0.55.0 // indirect
golang.org/x/oauth2 v0.36.0 // indirect
golang.org/x/sync v0.22.0 // indirect
golang.org/x/sys v0.47.0 // indirect
golang.org/x/time v0.15.0 // indirect
golang.org/x/tools v0.47.0 // indirect
golang.org/x/tools v0.49.0 // indirect
google.golang.org/genproto/googleapis/api v0.0.0-20260526163538-3dc84a4a5aaa // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20260526163538-3dc84a4a5aaa // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
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24 changes: 12 additions & 12 deletions go.sum
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Expand Up @@ -625,8 +625,8 @@ golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPh
golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/crypto v0.54.0 h1:YLIA59K4fiNzHzjnZt2tUJQjQtUWfWbeHBqKtk3eScw=
golang.org/x/crypto v0.54.0/go.mod h1:KWL8ny2AZdGR2cWmzeHrp2azQPGogOv+HeQaVEXC2dk=
golang.org/x/crypto v0.55.0 h1:+KWHjbgOaAQ66dh/YlkZKHlz9ZUlq61AFirAR9ntP8M=
golang.org/x/crypto v0.55.0/go.mod h1:uq0V9dE/fzQuJtbnL+2EhWOE63vo164FY8xqEnV9xis=
golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
Expand Down Expand Up @@ -662,8 +662,8 @@ golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.4.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.4.1/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.38.0 h1:MECBjubtXD7yj4HrhIUcywNaGeNVUdfVnxmPajOk4yk=
golang.org/x/mod v0.38.0/go.mod h1:V6Xz0pq8TQ3dGqVQ1FVHuelZpAL0uNhSkk9ogYP3c40=
golang.org/x/mod v0.40.0 h1:hUv+3cXcdRHz08UmSiOob7sadHig73uo5bkXxQ/tvUs=
golang.org/x/mod v0.40.0/go.mod h1:0/weTWkPWGBikyTWAX3dkjVztMmBA5hM0DH6BElSupE=
golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
Expand Down Expand Up @@ -711,8 +711,8 @@ golang.org/x/net v0.0.0-20220325170049-de3da57026de/go.mod h1:CfG3xpIq0wQ8r1q4Su
golang.org/x/net v0.0.0-20220412020605-290c469a71a5/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
golang.org/x/net v0.0.0-20220425223048-2871e0cb64e4/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
golang.org/x/net v0.0.0-20220520000938-2e3eb7b945c2/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
golang.org/x/net v0.57.0 h1:K5+3DljvIuDG9/Jv9rvyMywYNFCQ9RSUY6OOTTkT+tE=
golang.org/x/net v0.57.0/go.mod h1:KpXc8iv+r3XplLAG/f7Jsf9RPszJzdR0f58q9vGOuEU=
golang.org/x/net v0.58.0 h1:ynWG7rqYi4ccpTEuPZ2QGWHktVEM9DMCj9yzDE0Q7To=
golang.org/x/net v0.58.0/go.mod h1:YwCddHnFlT7eLQqVprV19OnhLGtc5xOKgE0RyqgfWAU=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
Expand Down Expand Up @@ -840,8 +840,8 @@ golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
golang.org/x/text v0.40.0 h1:Ub2Z6/xjgF1WrYQz2nuITOEegKFtiIy+rieRJ5lHZKs=
golang.org/x/text v0.40.0/go.mod h1:hpnzDAfGV753zIKo+wk3u1bVKCGPbrnF7+7LBF/UHVY=
golang.org/x/text v0.41.0 h1:vz/seA0lnX87Othu2f/0L24RcgrXD9/YFTSuGjj3rH8=
golang.org/x/text v0.41.0/go.mod h1:jvf1O8ajNzZqhSrQBPbutR/EB83Cc0CFrezNQIwbb5M=
golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
Expand Down Expand Up @@ -902,8 +902,8 @@ golang.org/x/tools v0.1.2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.1.3/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.1.4/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.47.0 h1:7Kn5x/d1svx/PzryTsqeoZN4TZwqeH5pGWjefhLi/1Q=
golang.org/x/tools v0.47.0/go.mod h1:dFHnyTvFWY212G+h7ZY4Vsp/K3U4/7W9TyVaAul8uCA=
golang.org/x/tools v0.49.0 h1:3NI7VXzL9+1WZD52Dx2ttoPwD5DWrFGpl9mFZDlmisI=
golang.org/x/tools v0.49.0/go.mod h1:SJNXV9DBKT0UbdttsQjbfJlAE/q+y36++zo3uL3N0Oo=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
Expand Down Expand Up @@ -1070,8 +1070,8 @@ google.golang.org/grpc v1.44.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ5
google.golang.org/grpc v1.45.0/go.mod h1:lN7owxKUQEqMfSyQikvvk5tf/6zMPsrK+ONuO11+0rQ=
google.golang.org/grpc v1.46.0/go.mod h1:vN9eftEi1UMyUsIF80+uQXhHjbXYbm0uXoFCACuMGWk=
google.golang.org/grpc v1.46.2/go.mod h1:vN9eftEi1UMyUsIF80+uQXhHjbXYbm0uXoFCACuMGWk=
google.golang.org/grpc v1.82.1 h1:NnAxzGRA0677vCa4BUkOAnO5+FfQqVl9iUXeD0IqcGE=
google.golang.org/grpc v1.82.1/go.mod h1:yzTZ1TB1Z3SG+LIYaI+WiE8D5+PZ3ArnrSp8zF3+/ZA=
google.golang.org/grpc v1.83.1 h1:HIO0+BEtBP6soyqvqC8sNUjZ7bTs+0hFQuFF+RAy++Y=
google.golang.org/grpc v1.83.1/go.mod h1:kDyl6SKsiHKt0uylY5gtn5cEjkrIOhQOGDgIc4JGwzQ=
google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.1.0/go.mod h1:6Kw0yEErY5E/yWrBtf03jp27GLLJujG4z/JK95pnjjw=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
Expand Down
124 changes: 124 additions & 0 deletions inhibit/cache.go
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// Copyright The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package inhibit

import (
"context"
"sync"
"time"

"github.com/prometheus/common/model"

"github.com/prometheus/alertmanager/alert"
)

// cache contains the runtime state of the inhibit rule.
type cache struct {
equal map[model.LabelName]struct{}

mtx sync.RWMutex
// alerts is the map of alerts that match the source matchers of the inhibit rule.
alerts map[model.Fingerprint]*alert.Alert
// index is a map of equal label fingerprint to the set of source alert fingerprints stored
// in the cache.
index map[model.Fingerprint]model.FingerprintSet
}

func newCache(equal map[model.LabelName]struct{}) *cache {
return &cache{
equal: equal,
alerts: make(map[model.Fingerprint]*alert.Alert),
index: make(map[model.Fingerprint]model.FingerprintSet),
}
}

// fingerprintEquals returns the fingerprint of the equal labels of the given label set.
func (c *cache) fingerprintEquals(lset model.LabelSet) model.Fingerprint {
equalSet := make(model.LabelSet, len(c.equal))
for n := range c.equal {
equalSet[n] = lset[n]
}
return equalSet.Fingerprint()
}

// set adds or replaces the given source alert.
func (c *cache) set(a *alert.Alert) {
fp := a.Fingerprint()
eq := c.fingerprintEquals(a.Labels)

c.mtx.Lock()
defer c.mtx.Unlock()

c.alerts[fp] = a
set, ok := c.index[eq]
if !ok {
set = model.FingerprintSet{}
c.index[eq] = set
}
set[fp] = struct{}{}
}

// find returns the fingerprint of a cached source alert that shares the equal
// labels of lset, is active at now, and satisfies match.
func (c *cache) find(lset model.LabelSet, now time.Time, match func(*alert.Alert) bool) (model.Fingerprint, bool) {
eq := c.fingerprintEquals(lset)

c.mtx.RLock()
defer c.mtx.RUnlock()

for fp := range c.index[eq] {
a := c.alerts[fp]
if a.ResolvedAt(now) {
continue
}
if !match(a) {
continue
}
return fp, true
}

return model.Fingerprint(0), false
}

func (c *cache) run(ctx context.Context, interval time.Duration) {
t := time.NewTicker(interval)
defer t.Stop()
for {
select {
case <-ctx.Done():
return
case <-t.C:
c.gc()
}
}
}

func (c *cache) gc() {
c.mtx.Lock()
defer c.mtx.Unlock()

for fp, a := range c.alerts {
if !a.Resolved() {
continue
}
delete(c.alerts, fp)

eq := c.fingerprintEquals(a.Labels)
set := c.index[eq]
delete(set, fp)
if len(set) == 0 {
delete(c.index, eq)
}
}
}
64 changes: 0 additions & 64 deletions inhibit/index.go
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