Network configuration was changed unexpectedly on an overcloud node

Issue

• Network configuration was changed unexpectedly on an overcloud node.
  Previous configuration was generated by os-net-config while current configuration was generated by cloud-init.

  (Previous Configuration of /etc/sysconfig/network-scripts/ifcfg-eth0)
  # This file is autogenerated by os-net-config
  DEVICE=eth0
  ONBOOT=yes
  HOTPLUG=no
  NM_CONTROLLED=no
  PEERDNS=no
  MASTER=bond0
  SLAVE=yes
  BOOTPROTO=none
  MTU=9000
  
  (Current Configuration of /etc/sysconfig/network-scripts/ifcfg-eth0)
  # Created by cloud-init on instance boot automatically, do not edit.
  #
  BOOTPROTO=none
  DEFROUTE=yes
  DEVICE=eth0
  GATEWAY=10.0.0.1
  HWADDR=00:00:00:00:00:aa
  IPADDR=10.0.0.2
  MTU=9000
  NETMASK=255.255.255.0
  ONBOOT=yes
  STARTMODE=auto
  TYPE=Ethernet
  USERCTL=no
  

• SSH connection to the overcloud node is frequently disconnected by Broken pipe.

  $ ssh -vvv heat-admin@compute-0
  packet_write_wait: Connection to 10.0.0.2 port 22: Broken pipe