grafana: deployment strategy; root_url for alerting

README.md

@@ -595,6 +595,7 @@ Download values file for prometheus-stack helm chart and replace any macros with
 * %MASTER_NODE_IPV4_ADDR% -> IPv4 address of your cluster master node  
 * %PVC_STORAGECLASS% -> your storageclass for persistent storage  
 * %PVC_STORAGE_SIZE% -> size of persistent storage, e.g. 4Gi
+* %PVC_STORAGE_SIZE_GRAFANA% -> size of persistent storage of grafana, e.g. 1Gi
 * %SMTP_HOST% 
 * %SMTP_USER%
 * %SMTP_PASSWORD%

prom-stack-values.yaml

@@ -714,6 +714,10 @@ grafana:
   enabled: true
   namespaceOverride: ""
 
+  # https://github.com/prometheus-community/helm-charts/issues/436#issuecomment-867472963
+  deploymentStrategy:
+    type: Recreate
+  
   # https://github.com/prometheus-community/helm-charts/issues/436#issuecomment-740664621
   persistence:
     enabled: true
@@ -727,6 +731,8 @@ grafana:
 
   # h%ttps://github.com/prometheus-community/helm-charts/issues/1969#issuecomment-1119567241
   grafana.ini:
+   server:
+      root_url: 'https://%SERVICE_FQDN%/'
     smtp:
       enabled: true
       # SMTP config follows here as per