fix: mysql terminated

dev-upgrade/mysql/mysql-dev.yaml

@@ -14,6 +14,14 @@ spec:
       labels:
         name: mysql
     spec:
+      securityContext:
+        sysctls:
+        - name: net.ipv4.tcp_keepalive_time
+          value: "300"
+        - name: net.ipv4.tcp_keepalive_intvl
+          value: "10"
+        - name: net.ipv4.tcp_keepalive_probes
+          value: "3"
       containers:
       - name: mysql
         image: mysql:8.0.33