[Bug 1819747] [NEW] dhclient does not work with busybox ip

[Thadeu Lima de Souza Cascardo]

Public bug reported:

After isc-dhcp update from 4.3.5 to 4.4.1, dhclient-script uses
valid_lft option when adding an IPv4 address.

When used on the initrd generated by initramfs-tools, this will fail
because busybox ip does not support this option.

This affects the use of cloud-initramfs-dyn-netconf and ip= command line
option, which breaks initramfs-tools testing.

** Affects: busybox (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: cloud-initramfs-tools (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: initramfs-tools (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: isc-dhcp (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: busybox (Ubuntu Disco)
     Importance: Undecided
         Status: New

** Affects: cloud-initramfs-tools (Ubuntu Disco)
     Importance: Undecided
         Status: New

** Affects: initramfs-tools (Ubuntu Disco)
     Importance: Undecided
         Status: New

** Affects: isc-dhcp (Ubuntu Disco)
     Importance: Undecided
         Status: New

** Also affects: initramfs-tools (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: cloud-initramfs-tools (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: busybox (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: busybox (Ubuntu Disco)
   Importance: Undecided
       Status: New

** Also affects: initramfs-tools (Ubuntu Disco)
   Importance: Undecided
       Status: New

** Also affects: isc-dhcp (Ubuntu Disco)
   Importance: Undecided
       Status: New

** Also affects: cloud-initramfs-tools (Ubuntu Disco)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1819747

Title:
  dhclient does not work with busybox ip

Status in busybox package in Ubuntu:
  New
Status in cloud-initramfs-tools package in Ubuntu:
  New
Status in initramfs-tools package in Ubuntu:
  New
Status in isc-dhcp package in Ubuntu:
  New
Status in busybox source package in Disco:
  New
Status in cloud-initramfs-tools source package in Disco:
  New
Status in initramfs-tools source package in Disco:
  New
Status in isc-dhcp source package in Disco:
  New

Bug description:
  After isc-dhcp update from 4.3.5 to 4.4.1, dhclient-script uses
  valid_lft option when adding an IPv4 address.

  When used on the initrd generated by initramfs-tools, this will fail
  because busybox ip does not support this option.

  This affects the use of cloud-initramfs-dyn-netconf and ip= command
  line option, which breaks initramfs-tools testing.

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