Multicloud :: Azure OnPrem :: OnPrem GW network restart fails.

I see network restart failing intermittently on the OnPrem GW and I have to reboot the node to recover it from this state.

Ansible Play:- ansible/gateway/playbooks/deploy_and_run_all.yml
Ansible File:- ansible/gateway/playbooks/roles/loopback/tasks/main.yaml
Ansible Task:-

  - name: Restart networking Ubuntu
    service:
      name: networking
      state: restarted
    when: ansible_distribution == "Ubuntu"

Ansible ERROR:-

2018-10-26 09:37:15,958 p=18479 u=root | fatal: [192.168.2.1]: FAILED! => {"changed": false, "failed": true, "msg": "Unable to restart service networking: Job for networking.service failed because the control process exited with error code. See \"systemctl status networking.service\" and \"journalctl -xe\" for details.\n"}

Manually if I try I see this:-

root@5c3s1-node4:~# service networking status
* networking.service - Raise network interfaces
   Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: enabled)
  Drop-In: /run/systemd/generator/networking.service.d
           `-50-insserv.conf-$network.conf
   Active: failed (Result: exit-code) since Fri 2018-10-26 02:37:13 PDT; 23min ago
     Docs: man:interfaces(5)
  Process: 36080 ExecStop=/sbin/ifdown -a --read-environment --exclude=lo (code=exited, status=0/SUCCESS)
  Process: 36244 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=1/FAILURE)
  Process: 36236 ExecStartPre=/bin/sh -c [ "$CONFIGURE_INTERFACES" != "no" ] && [ -n "$(ifquery --read-environment --list --exclude=lo)" ] && udevadm settle (code=exited, status=0/SUCCESS)
 Main PID: 36244 (code=exited, status=1/FAILURE)

Oct 26 02:37:13 5c3s1-node4 ifup[36244]: /etc/network/interfaces.d/interfaces: Is a directory
Oct 26 02:37:13 5c3s1-node4 ifup[36244]: /etc/network/interfaces.d/interfaces: Is a directory
Oct 26 02:37:13 5c3s1-node4 ifup[36244]: sh: echo: I/O error
Oct 26 02:37:13 5c3s1-node4 ifup[36244]: Waiting for a slave to join bond0 (will timeout after 60s)
Oct 26 02:37:13 5c3s1-node4 ifup[36244]: RTNETLINK answers: File exists
Oct 26 02:37:13 5c3s1-node4 ifup[36244]: Failed to bring up bond0.
Oct 26 02:37:13 5c3s1-node4 systemd[1]: networking.service: Main process exited, code=exited, status=1/FAILURE
Oct 26 02:37:13 5c3s1-node4 systemd[1]: Failed to start Raise network interfaces.
Oct 26 02:37:13 5c3s1-node4 systemd[1]: networking.service: Unit entered failed state.
Oct 26 02:37:13 5c3s1-node4 systemd[1]: networking.service: Failed with result 'exit-code'.
root@5c3s1-node4:~# service networking start
Job for networking.service failed because the control process exited with error code. See "systemctl status networking.service" and "journalctl -xe" for details.
root@5c3s1-node4:~# systemctl status networking.service
* networking.service - Raise network interfaces
   Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: enabled)
  Drop-In: /run/systemd/generator/networking.service.d
           `-50-insserv.conf-$network.conf
   Active: failed (Result: exit-code) since Fri 2018-10-26 03:01:20 PDT; 15s ago
     Docs: man:interfaces(5)
  Process: 36080 ExecStop=/sbin/ifdown -a --read-environment --exclude=lo (code=exited, status=0/SUCCESS)
  Process: 37499 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=1/FAILURE)
  Process: 37493 ExecStartPre=/bin/sh -c [ "$CONFIGURE_INTERFACES" != "no" ] && [ -n "$(ifquery --read-environment --list --exclude=lo)" ] && udevadm settle (code=exited, status=0/SUCCESS)
 Main PID: 37499 (code=exited, status=1/FAILURE)

Oct 26 03:01:19 5c3s1-node4 sh[37493]: /etc/network/interfaces.d/interfaces: Is a directory
Oct 26 03:01:19 5c3s1-node4 ifup[37499]: /etc/network/interfaces.d/interfaces: Is a directory
Oct 26 03:01:20 5c3s1-node4 ifup[37499]: sh: echo: I/O error
Oct 26 03:01:20 5c3s1-node4 ifup[37499]: Waiting for a slave to join bond0 (will timeout after 60s)
Oct 26 03:01:20 5c3s1-node4 ifup[37499]: RTNETLINK answers: File exists
Oct 26 03:01:20 5c3s1-node4 ifup[37499]: Failed to bring up bond0.
Oct 26 03:01:20 5c3s1-node4 systemd[1]: networking.service: Main process exited, code=exited, status=1/FAILURE
Oct 26 03:01:20 5c3s1-node4 systemd[1]: Failed to start Raise network interfaces.
Oct 26 03:01:20 5c3s1-node4 systemd[1]: networking.service: Unit entered failed state.
Oct 26 03:01:20 5c3s1-node4 systemd[1]: networking.service: Failed with result 'exit-code'.
root@5c3s1-node4:~#