Add a new mimir.alerts.kubernetes component (#3448)

* Add a new mimir.alerts.kubernetes component

* Sync Mimir periodically, test the case of a CRD deletion

* Add TODOs

* Longer test timeout

* Check if pods are running

* Apply suggestions from code review

Co-authored-by: Clayton Cornell <131809008+clayton-cornell@users.noreply.github.com>

* Fix metric doc

* Fix changelog

---------

Co-authored-by: Clayton Cornell <131809008+clayton-cornell@users.noreply.github.com>

Author: ptodev

.github/ISSUE_TEMPLATE/blank.yaml

@@ -78,6 +78,7 @@ body:
       - loki.source.syslog
       - loki.source.windowsevent
       - loki.write
+      - mimir.alerts.kubernetes
       - mimir.rules.kubernetes
       - otelcol.auth.basic
       - otelcol.auth.bearer

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -78,6 +78,7 @@ body:
       - loki.source.syslog
       - loki.source.windowsevent
       - loki.write
+      - mimir.alerts.kubernetes
       - mimir.rules.kubernetes
       - otelcol.auth.basic
       - otelcol.auth.bearer

.github/ISSUE_TEMPLATE/docs.yaml

@@ -81,6 +81,7 @@ body:
       - loki.source.syslog
       - loki.source.windowsevent
       - loki.write
+      - mimir.alerts.kubernetes
       - mimir.rules.kubernetes
       - otelcol.auth.basic
       - otelcol.auth.bearer

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -78,6 +78,7 @@ body:
       - loki.source.syslog
       - loki.source.windowsevent
       - loki.write
+      - mimir.alerts.kubernetes
       - mimir.rules.kubernetes
       - otelcol.auth.basic
       - otelcol.auth.bearer

.github/ISSUE_TEMPLATE/proposal.yaml

@@ -78,6 +78,7 @@ body:
       - loki.source.syslog
       - loki.source.windowsevent
       - loki.write
+      - mimir.alerts.kubernetes
       - mimir.rules.kubernetes
       - otelcol.auth.basic
       - otelcol.auth.bearer

.github/workflows/integration-tests-k8s.yml

@@ -0,0 +1,23 @@
+name: Integration Tests on Kubernetes
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  run_tests:
+    runs-on:
+      labels: github-hosted-ubuntu-x64-large
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+    - name: Setup Go
+      uses: actions/setup-go@v5
+      with:
+        go-version-file: go.mod
+    - name: Run tests
+      run: make integration-test-k8s

CHANGELOG.md

@@ -76,6 +76,8 @@ v1.12.0-rc.1
   - The `otelcol.processor.servicegraph` component now supports defining the maximum number of buckets for generated exponential histograms.
   - See the upstream [core][https://github.com/open-telemetry/opentelemetry-collector/blob/v0.139.0/CHANGELOG.md] and [contrib][https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/v0.139.0/CHANGELOG.md] changelogs for more details.
 
+- A new `mimir.alerts.kubernetes` component which discovers `AlertmanagerConfig` Kubernetes resources and loads them into a Mimir instance. (@ptodev)
+
 ### Enhancements
 
 - Add per-application rate limiting with the `strategy` attribute in the `faro.receiver` component, to prevent one application from consuming the rate limit quota of others. (@hhertout)

Makefile

@@ -158,7 +158,7 @@ run-alloylint: alloylint
 # more for packages that exclude tests via //go:build !race due to known race detection issues. The
 # final command runs tests for syntax module.
 test:
-	$(GO_ENV) go test $(GO_FLAGS) -race $(shell go list ./... | grep -v /integration-tests/)
+	$(GO_ENV) go test $(GO_FLAGS) -race $(shell go list ./... | grep -v -E '/integration-tests/|/integration-tests-k8s/')
 	$(GO_ENV) go test $(GO_FLAGS) ./internal/static/integrations/node_exporter
 	$(GO_ENV) cd ./syntax && go test -race ./...
 
@@ -180,6 +180,11 @@ test-pyroscope:
 	cd ./internal/component/pyroscope/util/internal/cmd/playground/ && \
 		$(GO_ENV) go build .
 
+.PHONY: integration-test-k8s
+integration-test-k8s: alloy-image
+	cd ./internal/cmd/integration-tests-k8s/ && \
+		$(GO_ENV) go test -timeout 10m ./...
+
 #
 # Targets for building binaries
 #