feat: Add support containers.resizePolicy in deployments

* Container resource resize policy for deployment, allows dynamic adjustment of CPU and memory resources without pod restart. * Reference: https://kubernetes.io/docs/tasks/configure-pod-container/resize-container-resources/ Signed-off-by: younsl <cysl@kakao.com>

Author: younsl

charts/docker-mailserver/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: "15.0.2"
 description: A fullstack but simple mailserver (smtp, imap, antispam, antivirus, ssl...) using Docker.
 name: docker-mailserver
-version: 4.2.2
+version: 4.2.3
 sources:
 - https://github.com/docker-mailserver/docker-mailserver-helm
 maintainers:

charts/docker-mailserver/templates/deployment.yaml

@@ -128,6 +128,10 @@ spec:
 
  resources:
 {{ toYaml .Values.deployment.resources | indent 12 }}
+ {{- if .Values.deployment.resizePolicy }}
+ 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 .Values.metrics.resizePolicy }}
+ 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: []
 
@@ -458,6 +468,16 @@ 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