From d01a3007125efa170d18e28a8cf32024a723fc89 Mon Sep 17 00:00:00 2001
From: Philippe Vienne <philippe@skyloud.fr>
Date: Wed, 23 Oct 2024 13:53:45 +0200
Subject: [PATCH] fix: support alertmanager

---
 charts/mimir/Chart.yaml                       |  2 +-
 charts/mimir/monolithic.yaml                  | 21 +++++++++----------
 .../monolithic/monolithic-statefulset.yaml    | 11 +++++++++-
 3 files changed, 21 insertions(+), 13 deletions(-)

diff --git a/charts/mimir/Chart.yaml b/charts/mimir/Chart.yaml
index 25d0de9..c72c16e 100644
--- a/charts/mimir/Chart.yaml
+++ b/charts/mimir/Chart.yaml
@@ -1,5 +1,5 @@
 apiVersion: v2
-version: 5.5.0
+version: 5.5.1
 appVersion: r305
 description: "Grafana Mimir"
 home: https://grafana.com/docs/helm-charts/mimir-distributed/latest/
diff --git a/charts/mimir/monolithic.yaml b/charts/mimir/monolithic.yaml
index ff4ff58..29bf2cb 100644
--- a/charts/mimir/monolithic.yaml
+++ b/charts/mimir/monolithic.yaml
@@ -39,12 +39,12 @@ monolithic:
     size: "8Gi"
     storageClass: gp3-3000-125
   priorityClassName: "optional-rescheduling-priority-multi-az"
-    # The zone aware replication doesn't yet make a lot of difference, since it is not used at query side yet. This is
-    # however planned in an upcoming release, and therefore it's best to have this configuration already enabled.
+  # The zone aware replication doesn't yet make a lot of difference, since it is not used at query side yet. This is
+  # however planned in an upcoming release, and therefore it's best to have this configuration already enabled.
   zoneAwareReplication:
     enabled: true
-    topologyKey: "topology.kubernetes.io/zone"  # This generates default anti-affinity rules
-    zones:  # Zone list has to be fully redefined for modification. Update with you actual zones or skip to use logical zones only.
+    topologyKey: "topology.kubernetes.io/zone" # This generates default anti-affinity rules
+    zones: # Zone list has to be fully redefined for modification. Update with you actual zones or skip to use logical zones only.
     - name: zone-a
       nodeSelector:
         topology.kubernetes.io/zone: eu-west-1a
@@ -63,10 +63,10 @@ nginx:
   ingress:
     enabled: true
     hosts:
-      - host: "mimir.multi-az.test.ngdata.com"
-        paths:
-          - path: /
-            pathType: Prefix
+    - host: "mimir.multi-az.test.ngdata.com"
+      paths:
+      - path: /
+        pathType: Prefix
     tls:
     # empty, disabled.
 
@@ -75,7 +75,6 @@ minio:
   enabled: false
   replicas: 0
 
-# The Alert manager is currently not used. When enabling, it has to be configured for zone aware replication similar to
-# monolithic setup.
+# The Alert manager is included in the monolithic deployment
 alertmanager:
-  enabled: false
\ No newline at end of file
+  enabled: false
diff --git a/charts/mimir/templates/monolithic/monolithic-statefulset.yaml b/charts/mimir/templates/monolithic/monolithic-statefulset.yaml
index 47aa3dc..e147af0 100644
--- a/charts/mimir/templates/monolithic/monolithic-statefulset.yaml
+++ b/charts/mimir/templates/monolithic/monolithic-statefulset.yaml
@@ -106,6 +106,11 @@ spec:
         {{- end }}
         - name: active-queries
           emptyDir: {}
+        {{- if .Values.alertmanager.fallbackConfig }}
+        - name: alertmanager-fallback-config
+          configMap:
+            name: {{ include "mimir.resourceName" (dict "ctx" . "component" "alertmanager") }}-fallback-config
+        {{- end }}
       containers:
         {{- if .Values.monolithic.extraContainers }}
         {{ toYaml .Values.monolithic.extraContainers | nindent 8 }}
@@ -114,7 +119,7 @@ spec:
           image: "{{ include "mimir.imageReference" . }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           args:
-            - "-target=all"
+            - "-target=all,alertmanager"
             - "-config.expand-env=true"
             - "-config.file=/etc/mimir/mimir.yaml"
             {{- if $zoneName }}
@@ -162,6 +167,10 @@ spec:
             {{- end }}
             - name: active-queries
               mountPath: /active-query-tracker
+            {{- if .Values.alertmanager.fallbackConfig }}
+            - name: alertmanager-fallback-config
+              mountPath: /configs/
+            {{- end }}
           ports:
             - name: http-metrics
               containerPort: {{ include "mimir.serverHttpListenPort" . }}