Declare Matrix Alertmanager receiver in Argo CD

apps/matrix-alertmanager-receiver/values.yaml

@@ -0,0 +1,11 @@
+matrix:
+  homeserverUrl: https://matrix.brunner.ninja
+  userId: "@alertmanager:brunner.ninja"
+  roomMapping:
+    cluster: "!ckpLXMvXlZJtuvQBIJ:brunner.ninja"
+  accessTokenSecret:
+    name: alertmanager-matrix-auth
+    key: token
+
+serviceMonitor:
+  enabled: true

bootstrap/kustomization.yaml

@@ -62,6 +62,8 @@ resources:
 - grafana.yaml
 - prometheus-project.yaml
 - prometheus.yaml
+- matrix-alertmanager-receiver-project.yaml
+- matrix-alertmanager-receiver.yaml
 - visual-studio-code.yaml
 - wiki-js.yaml
 - paperless-project.yaml

bootstrap/matrix-alertmanager-receiver-project.yaml

@@ -0,0 +1,22 @@
+apiVersion: argoproj.io/v1alpha1
+kind: AppProject
+metadata:
+  name: matrix-alertmanager-receiver
+  namespace: argocd
+spec:
+  description: Matrix Alertmanager webhook receiver
+  sourceRepos:
+    - https://brunner.ninja/charts
+    - https://code.brunner.ninja/feedc0de/homelab-gitops.git
+  destinations:
+    - namespace: prometheus
+      server: https://kubernetes.default.svc
+  namespaceResourceWhitelist:
+    - group: ""
+      kind: ConfigMap
+    - group: apps
+      kind: Deployment
+    - group: ""
+      kind: Service
+    - group: monitoring.coreos.com
+      kind: ServiceMonitor

bootstrap/matrix-alertmanager-receiver.yaml

@@ -0,0 +1,28 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: matrix-alertmanager-receiver
+  namespace: argocd
+spec:
+  project: matrix-alertmanager-receiver
+  sources:
+    - repoURL: https://brunner.ninja/charts
+      chart: matrix-alertmanager-receiver
+      targetRevision: 2026.9.23
+      helm:
+        releaseName: matrix-alertmanager-receiver
+        valueFiles:
+          - $values/apps/matrix-alertmanager-receiver/values.yaml
+    - repoURL: https://code.brunner.ninja/feedc0de/homelab-gitops.git
+      targetRevision: main
+      ref: values
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: prometheus
+  syncPolicy:
+    automated:
+      enabled: true
+      prune: false
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=false