feature: readinessProbe추가, RollingUpdate 전략 추가

Author: emibgo2

devops/helm/mgmg/templates/deployment.yaml

@@ -7,6 +7,11 @@ metadata:
     {{- include "mgmg.labels" . | nindent 4 }}
 spec:
   replicas: {{ .Values.replicaCount }}
+  strategy:
+  type: RollingUpdate
+  rollingUpdate:
+    maxUnavailable: 0
+    maxSurge: 1
   selector:
     matchLabels:
       {{- include "mgmg.selectorLabels" . | nindent 6 }}
@@ -25,6 +30,16 @@ spec:
         imagePullPolicy: {{ .Values.image.pullPolicy }}
         ports:
         - containerPort: {{ .Values.service.targetPort }}
+        readinessProbe:
+          httpGet:
+            path: /
+            port: 3000
+          initialDelaySeconds: 5
+          periodSeconds: 10
+          timeoutSeconds: 5
+          failureThreshold: 3
+          successThreshold: 1
+
         env:
         {{- toYaml .Values.env | nindent 8 }}
         {{- if .Values.configMap }}