[Bug 1903036] Re: systemd-* no more resolution after apt upgrade 20.04

[Poil]

** Description changed:

  When building an image, via Packer on Azure, based on official Ubuntu
  20.04 "0001-com-ubuntu-server-focal" after apt-upgrading I have no more
  DNS resolution
  
  If I mark as hold systemd systemd-* the resolution is OK
  
  Before :
  
-     azure-arm: Link 2 (eth0)
-     azure-arm:       Current Scopes: DNS
-     azure-arm: DefaultRoute setting: yes
- ==> azure-arm:
-     azure-arm:        LLMNR setting: yes
-     azure-arm: MulticastDNS setting: no
- ==> azure-arm: WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
-     azure-arm:   DNSOverTLS setting: no
- ==> azure-arm:
-     azure-arm:       DNSSEC setting: no
-     azure-arm:     DNSSEC supported: no
-     azure-arm:   Current DNS Server: 168.63.129.16
-     azure-arm:          DNS Servers: 168.63.129.16
+     azure-arm: Link 2 (eth0)
+     azure-arm:       Current Scopes: DNS
+     azure-arm: DefaultRoute setting: yes
+     azure-arm:        LLMNR setting: yes
+     azure-arm: MulticastDNS setting: no
+     azure-arm:   DNSOverTLS setting: no
+     azure-arm:       DNSSEC setting: no
+     azure-arm:     DNSSEC supported: no
+     azure-arm:   Current DNS Server: 168.63.129.16
+     azure-arm:          DNS Servers: 168.63.129.16
  
  After :
  
-     azure-arm: Link 2 (eth0)
-     azure-arm:       Current Scopes: none
-     azure-arm: DefaultRoute setting: no
-     azure-arm:        LLMNR setting: yes
-     azure-arm: MulticastDNS setting: no
-     azure-arm:   DNSOverTLS setting: no
-     azure-arm:       DNSSEC setting: no
-     azure-arm:     DNSSEC supported: no
+     azure-arm: Link 2 (eth0)
+     azure-arm:       Current Scopes: none
+     azure-arm: DefaultRoute setting: no
+     azure-arm:        LLMNR setting: yes
+     azure-arm: MulticastDNS setting: no
+     azure-arm:   DNSOverTLS setting: no
+     azure-arm:       DNSSEC setting: no
+     azure-arm:     DNSSEC supported: no
  
  Best regards,

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https://bugs.launchpad.net/bugs/1903036

Title:
  systemd-* no more resolution after apt upgrade 20.04

Status in systemd package in Ubuntu:
  New

Bug description:
  When building an image, via Packer on Azure, based on official Ubuntu
  20.04 "0001-com-ubuntu-server-focal" after apt-upgrading I have no
  more DNS resolution

  If I mark as hold systemd systemd-* the resolution is OK

  Before :

      azure-arm: Link 2 (eth0)
      azure-arm:       Current Scopes: DNS
      azure-arm: DefaultRoute setting: yes
      azure-arm:        LLMNR setting: yes
      azure-arm: MulticastDNS setting: no
      azure-arm:   DNSOverTLS setting: no
      azure-arm:       DNSSEC setting: no
      azure-arm:     DNSSEC supported: no
      azure-arm:   Current DNS Server: 168.63.129.16
      azure-arm:          DNS Servers: 168.63.129.16

  After :

      azure-arm: Link 2 (eth0)
      azure-arm:       Current Scopes: none
      azure-arm: DefaultRoute setting: no
      azure-arm:        LLMNR setting: yes
      azure-arm: MulticastDNS setting: no
      azure-arm:   DNSOverTLS setting: no
      azure-arm:       DNSSEC setting: no
      azure-arm:     DNSSEC supported: no

  Best regards,

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