[bot] Bump openshift/prometheus-alertmanager to v0.34.0

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -72,3 +72,50 @@ body:
       label: Logs
       description: Insert Prometheus and Alertmanager logs relevant to the issue here.
       render: text
+  - type: markdown
+    attributes:
+      value: |
+        ## Performance issues
+
+        The fields below are only relevant if you are reporting a performance issue (e.g. high CPU or memory usage). You can skip them otherwise.
+
+        You can upload the captured profiles to https://pprof.me/ and share the link to the profile diff between the previous and current versions.
+  - type: textarea
+    attributes:
+      label: CPU profiles
+      description: |
+        Please attach CPU profiles from both the previous version (where performance was acceptable) and the current version (where you observe the regression). This helps us compare and identify the cause.
+
+        See the upstream Go documentation on diagnostics for how to capture profiles: https://go.dev/doc/diagnostics. You can capture a CPU profile with:
+
+        `go tool pprof http://<alertmanager-host>:9093/debug/pprof/profile?seconds=30`
+  - type: textarea
+    attributes:
+      label: Memory profiles
+      description: |
+        Please attach memory (heap) profiles from both the previous version (where performance was acceptable) and the current version (where you observe the regression).
+
+        See the upstream Go documentation on diagnostics: https://go.dev/doc/diagnostics. You can capture a heap profile with:
+
+        `go tool pprof http://<alertmanager-host>:9093/debug/pprof/heap`
+  - type: input
+    attributes:
+      label: Number of alerts
+      description: Approximate number of alerts Alertmanager is handling when the issue occurs.
+  - type: input
+    attributes:
+      label: Number of silences
+      description: Approximate number of silences configured when the issue occurs.
+  - type: markdown
+    attributes:
+      value: |
+        ## Using prometheus-operator?
+
+        If you deploy Alertmanager via [prometheus-operator](https://github.com/prometheus-operator/prometheus-operator), please confirm the checklist below before opening the issue.
+  - type: checkboxes
+    attributes:
+      label: prometheus-operator checklist
+      description: Only applicable if you use prometheus-operator to manage Alertmanager.
+      options:
+        - label: I have confirmed this issue is not caused by a missing feature in prometheus-operator.
+        - label: I have reproduced this issue when running Alertmanager directly (without prometheus-operator).

.yamllint

@@ -1,4 +1,7 @@
 ---
+###
+# This file is synced from https://github.com/prometheus/prometheus
+###
 extends: default
 ignore: |
   **/node_modules

AGENTS.md

@@ -16,7 +16,8 @@ Alertmanager handles alerts sent by clients such as Prometheus. It deduplicates,
 
 Top‑level packages worth knowing:
 
-- `cmd/alertmanager/` — main binary entry point (`main.go`).
+- `cmd/alertmanager/` — main binary entry point (`main.go`); thin wrapper that parses flags and calls `app`.
+- `app/` — embeddable Alertmanager runtime extracted from `cmd/alertmanager`. Owns the process lifecycle (`New`/`Start`/`Stop`/`Reload`/`Run`), subsystem wiring (`setup`), config-reload subgraph (`reloader`), listeners and `Options`. Lets tests and other binaries run Alertmanager in‑process. See https://github.com/prometheus/alertmanager/issues/406.
 - `cmd/amtool/` — CLI for interacting with the Alertmanager API.
 - `api/` — HTTP API. `api/v2/` is the active API; `api/v1_deprecation_router.go` only returns deprecation responses.
 - `cli/` — `amtool` command implementations.

CHANGELOG.md

@@ -1,8 +1,24 @@
 ## main / (unreleased)
 
-* [CHANGE] ...
-* [FEATURE] ...
-* [ENHANCEMENT] ...
+## 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
+* [FEATURE] Add optional templatable labels to alert routes. #5328
+* [FEATURE] eventrecorder: Add inhibit rule names to `inhibition_muted_alert` events. #5315
+* [FEATURE] eventrecorder: Add stdout output type. #5311
+* [FEATURE] silences: Add active, expired, and pending boolean filter parameters to GET /api/v2/silences to allow filtering silences by state server-side. #5406
+* [FEATURE] sns: Add aws `external_id` support in sigv4 configuration. #5157
+* [FEATURE] template: Add `toDate` and `mustToDate` functions. #5327
+* [ENHANCEMENT] doc: Add AlertmanagerClusterFailedPeers alertmanager-mixin. #5301
+* [ENHANCEMENT] doc: Add description for Rocketchat parameters in global config. #5181
+* [ENHANCEMENT] doc: Add top level tracing configuration key. #5314
+* [ENHANCEMENT] doc: Fix Alertmanager port in amtool config routes example. #5312
+* [ENHANCEMENT] eventrecorder: Add optional webhook batching. #5392
+* [ENHANCEMENT] notify: The discord and webex integrations now report a failure `reason` on `alertmanager_notifications_failed_total`. #5332
+* [ENHANCEMENT] ui: Improve responsiveness of UI when loading thousands of alerts. #5357
+* [BUGFIX] eventrecorder: Fixed a minor performance regression when the event recorder is enabled. #5307
+* [BUGFIX] msteamsv2: Inherit global `proxy_url` into partial `http_config`. #5379
+* [BUGFIX] webhook: Keep custom `payload` string values verbatim instead of reinterpreting JSON leaves that look like YAML (e.g. values ending with a colon). #5304
 
 ## 0.33.1 / 2026-07-04
 

Makefile.common

@@ -59,13 +59,13 @@ ifneq ($(shell command -v gotestsum 2> /dev/null),)
 endif
 endif
 
-PROMU_VERSION ?= 0.18.1
+PROMU_VERSION ?= 0.20.0
 PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_VERSION)/promu-$(PROMU_VERSION).$(GO_BUILD_PLATFORM).tar.gz
 
 SKIP_GOLANGCI_LINT :=
 GOLANGCI_LINT :=
 GOLANGCI_LINT_OPTS ?=
-GOLANGCI_LINT_VERSION ?= v2.11.4
+GOLANGCI_LINT_VERSION ?= v2.12.2
 GOLANGCI_FMT_OPTS ?=
 # golangci-lint only supports linux, darwin and windows platforms on i386/amd64/arm64.
 # windows isn't included here because of the path separator being different.
@@ -170,7 +170,8 @@ common-deps:
 update-go-deps:
 	@echo ">> updating Go dependencies"
 	@for m in $$($(GO) list -mod=readonly -m -f '{{ if and (not .Indirect) (not .Main)}}{{.Path}}{{end}}' all); do \
-		$(GO) get $$m; \
+		# Prevent go get from pulling deps that require a newer Go version.
+		GOTOOLCHAIN=go$$($(GO) mod edit -json | jq -r .Go) $(GO) get $$m; \
 	done
 	$(GO) mod tidy
 

README.md

@@ -327,7 +327,7 @@ and it prints out all receivers the alert would match ordered and separated by `
 Example of usage:
 ```
 # View routing tree of remote Alertmanager
-$ amtool config routes --alertmanager.url=http://localhost:9090
+$ amtool config routes --alertmanager.url=http://localhost:9093
 
 # Test if alert matches expected receiver
 $ amtool config routes test --config.file=doc/examples/simple.yml --tree --verify.receivers=team-X-pager service=database owner=team-X

RELEASE.md

@@ -3,7 +3,7 @@ This page describes the release process and the currently planned schedule for u
 
 ## Release Schedule
 
-Release cadence of first pre-releases being cut is 12 weeks.
+Release cadence of first pre-releases being cut is approximately 8 weeks.
 
 | release series | date (year-month-day) | release shepherd                          |
 |----------------|-----------------------|-------------------------------------------|
@@ -14,7 +14,8 @@ Release cadence of first pre-releases being cut is 12 weeks.
 | v0.30          | 2025-12-12            | Solomon Jacobs (Github: @SoloJacobs)      |
 | v0.31          | 2026-01-31            | Solomon Jacobs (Github: @SoloJacobs)      |
 | v0.32          | 2026-04-08            | Solomon Jacobs (Github: @SoloJacobs)      |
-| v0.33          | 2026-06-08            | **volunteer welcome**                     |
+| v0.33          | 2026-06-08            | Ethan Hunter (Github: @Spaceman1701)      |
+| v0.34          | 2026-08-12            | Solomon Jacobs (Github: @SoloJacobs)      |
 
 If you are interested in volunteering please create a pull request against the [prometheus/alertmanager](https://github.com/prometheus/alertmanager) repository and propose yourself for the release of your choice.
 

VERSION

@@ -1 +1 @@
-0.33.1
+0.34.0