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[James Falcon <1863203@xxxxxxxxxxxxxxxxxx>]

Tracked in Github Issues as https://github.com/canonical/cloud-
init/issues/3606

** Bug watch added: github.com/canonical/cloud-init/issues #3606
   https://github.com/canonical/cloud-init/issues/3606

** Changed in: cloud-init
       Status: Triaged => Expired

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https://bugs.launchpad.net/bugs/1863203

Title:
  [cloud-init] "/etc/resolv.conf" is out of control of netconfig after
  done cloud-init GOSC on SLES15SP1

Status in cloud-init:
  Expired

Bug description:
  [cloud-init] "/etc/resolv.conf" is out of control of netconfig after
  done cloud-init GOSC on SLES15SP1

  Before GOSC, "/etc/resolv.conf" is link file
  "/run/netconfig/resolv.conf", in control by netconfig. After done
  cloud-init GOSC, this file become real file not link file, total
  different from "/run/netconfig/resolv.conf".

  cloud-init version is 19.4.
  ```
  pek2-gosv-16-dhcp83:~ # cloud-init -v
  /usr/bin/cloud-init 19.4
  ```

  Before GOSC:
  ```
  pek2-gosv-16-dhcp83:~ # ll /etc/resolv.conf
  lrwxrwxrwx 1 root root 26 Feb 10 23:33 /etc/resolv.conf -> /run/netconfig/resolv.conf
  ```

  After GOSC:
  ```
  pek2-gosv-16-dhcp83:~ # ll /etc/resolv.conf
  -rw-r--r-- 1 root root 153 Feb 11 09:46 /etc/resolv.conf
  pek2-gosv-16-dhcp83:~ # ll /run/netconfig/resolv.conf
  -rw-r--r-- 1 root root 707 Feb 14 06:10 /run/netconfig/resolv.conf

  ```

  cloud-init.log is attached.

  Steps:
  1. Deploy SLES15SP1 VM
  2. Power off VM and Deploy GOSC
  ```
  2020-02-11 08:46:34,797 - config_file.py[DEBUG]: FOUND CATEGORY = 'NETWORK'
  2020-02-11 08:46:34,797 - config_file.py[DEBUG]: ADDED KEY-VAL :: 'NETWORK|NETWORKING' = 'yes'
  2020-02-11 08:46:34,797 - config_file.py[DEBUG]: ADDED KEY-VAL :: 'NETWORK|BOOTPROTO' = 'dhcp'
  2020-02-11 08:46:34,797 - config_file.py[DEBUG]: ADDED KEY-VAL :: 'NETWORK|HOSTNAME' = 'gosc-dhcp-vm-01'
  2020-02-11 08:46:34,797 - config_file.py[DEBUG]: ADDED KEY-VAL :: 'NETWORK|DOMAINNAME' = 'eng.vmware.com'
  ...

  ```
  3. Power on VM and check GOSC resolve, expect /etc/resolv.conf is still link to /run/netconfig/resolv.conf and DNS setting is saved into this file.

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