Merge pull request docker-mailserver#183 from younsl/feat/support-resize-policy

feat: Add support containers.resizePolicy in deployments

Author: cfis

charts/docker-mailserver/templates/deployment.yaml

@@ -128,6 +128,10 @@ spec:
 
           resources:
 {{ toYaml .Values.deployment.resources | indent 12 }}
+          {{- if and .Values.deployment.resizePolicy (semverCompare ">=1.33-0" .Capabilities.KubeVersion.Version) }}
+          resizePolicy:
+{{ toYaml .Values.deployment.resizePolicy | indent 12 }}
+          {{- end }}
           securityContext:
             {{- if eq .Values.deployment.env.ENABLE_FAIL2BAN 1.0 }}
             capabilities:
@@ -271,7 +275,11 @@ spec:
               name: http
               protocol: TCP
           resources:
-{{ toYaml .Values.metrics.resources | indent 12 }}          
+{{ toYaml .Values.metrics.resources | indent 12 }}
+          {{- if and .Values.metrics.resizePolicy (semverCompare ">=1.33-0" .Capabilities.KubeVersion.Version) }}
+          resizePolicy:
+{{ toYaml .Values.metrics.resizePolicy | indent 12 }}
+          {{- end }}          
           securityContext:
 {{ toYaml .Values.deployment.containerSecurityContext | indent 12 }}
 

charts/docker-mailserver/values.yaml

@@ -262,6 +262,16 @@ deployment:
       memory: "2048Mi"
       ephemeral-storage: "500Mi"
 
+  ## Container resource resize policy for the docker-mailserver container
+  ## Allows dynamic adjustment of CPU and memory resources without pod restart
+  ## Useful for handling load spikes or optimizing resource utilization in production
+  ## ref: https://kubernetes.io/docs/tasks/configure-pod-container/resize-container-resources/
+  resizePolicy: []
+    # - resourceName: memory
+    #   restartPolicy: NotRequired
+    # - resourceName: cpu
+    #   restartPolicy: RestartContainer
+
   ## Optionally specify tolerations for the deployment
   tolerations: []
 
@@ -464,6 +474,16 @@ metrics:
     #  memory: "256Mi"
     #  cpu: "500M"
 
+  ## Container resource resize policy for the metrics-exporter container
+  ## Allows dynamic adjustment of CPU and memory resources without pod restart
+  ## Useful for handling load spikes or optimizing resource utilization in production
+  ## ref: https://kubernetes.io/docs/tasks/configure-pod-container/resize-container-resources/
+  resizePolicy: []
+    # - resourceName: memory
+    #   restartPolicy: NotRequired
+    # - resourceName: cpu
+    #   restartPolicy: RestartContainer
+
   serviceMonitor:
     enabled: false
     scrapeInterval: 15s