fix(prometheus): alertmanager discord webhook file

prometheus/alertmanager#3728

100-argo-apps/300-prometheus-manifests-k8s-cobi-tuana9a.yaml

@@ -0,0 +1,19 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: 300-prometheus-manifests-k8s-cobi-tuana9a
+  namespace: argocd
+spec:
+  project: default
+  revisionHistoryLimit: 10
+  source:
+    path: 300-prometheus-manifests-k8s-cobi-tuana9a
+    repoURL: https://github.com/tuana9a/platform.git
+    targetRevision: main
+  destination:
+    namespace: prometheus
+    server: https://kubernetes.default.svc
+  syncPolicy:
+    automated:
+      prune: false
+      selfHeal: true

100-argo-apps/300-prometheus.yaml

@@ -13,6 +13,7 @@ spec:
         releaseName: prometheus
         valueFiles:
           - $values/300-prometheus/values.yaml
+          - $values/300-prometheus/alertmanager-values.yaml
           - $values/300-prometheus/alert-values.yaml
           - $values/300-prometheus/alert-msg-template-values.yaml
     - repoURL: https://github.com/tuana9a/platform.git
@@ -21,7 +22,6 @@ spec:
   destination:
     server: "https://kubernetes.default.svc"
     namespace: prometheus
-  # NOTE: wait https://github.com/prometheus/alertmanager/pull/3728 to be released
   syncPolicy:
     automated:
       prune: false

300-prometheus-manfiests-k8s-cobi-tuana9a/alertmanager-secrets.yaml

@@ -0,0 +1,14 @@
+---
+apiVersion: secrets.hashicorp.com/v1beta1
+kind: VaultStaticSecret
+metadata:
+  name: discord-webhook-url
+spec:
+  type: kv-v1
+  mount: kv
+  path: kv/prometheus/alertmanager
+  destination:
+    name: discord-webhook-url
+    create: true
+  refreshAfter: 30s
+  vaultAuthRef: vault/secrets-operator

300-prometheus/alertmanager-values.yaml

@@ -0,0 +1,22 @@
+alertmanager:
+  image:
+    repository: quay.io/prometheus/alertmanager
+    pullPolicy: IfNotPresent
+    tag: "v0.28.0-rc.0" # fix https://github.com/prometheus/alertmanager/pull/3728
+  persistence:
+    storageClass: nfs-vdb
+    size: 2Gi
+  config:
+    enabled: true
+    route:
+      receiver: "discord"
+    receivers:
+      - name: "discord"
+        discord_configs:
+          - webhook_url_file: /etc/discord_webhook_url.txt
+  extraSecretMounts:
+    - name: discord-webhook-url
+      mountPath: /etc
+      subPath: "discord_webhook_url.txt"
+      secretName: discord-webhook-url
+      readOnly: true

300-prometheus/values.yaml

@@ -1,16 +1,4 @@
 server:
   persistentVolume:
     storageClass: nfs-vdb
-    size: 15Gi
-alertmanager:
-  persistence:
-    storageClass: nfs-vdb
-    size: 2Gi
-  config:
-    enabled: true
-    route:
-      receiver: "discord"
-    receivers:
-      - name: "discord"
-        discord_configs:
-          - webhook_url: "TODO"
+    size: 15Gi