[Bug 1671536] [NEW] Default initrd is LZMA compressed, yet rebuilt initramfs are gzip?

[Dimitri John Ledkov]

Public bug reported:

$ file ~/Downloads/xenial-server-cloudimg-amd64-initrd-generic
/home/xnox/Downloads/xenial-server-cloudimg-amd64-initrd-generic: LZMA compressed data, streamed

Yet, in the base image I don't see that initramfs config options set
COMPRESS=lzma. Thus first boot is lzma, yet on package upgrades i guess
initrd would be regenerated as gzip...

Isn't the fact that all of our images use lzma and/or xz compression
means we should switch Ubuntu default to lzma and/or xz as well?

** Affects: cloud-images
     Importance: Undecided
         Status: New

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

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

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Title:
  Default initrd is LZMA compressed, yet rebuilt initramfs are gzip?

Status in cloud-images:
  New
Status in initramfs-tools package in Ubuntu:
  New

Bug description:
  $ file ~/Downloads/xenial-server-cloudimg-amd64-initrd-generic
  /home/xnox/Downloads/xenial-server-cloudimg-amd64-initrd-generic: LZMA compressed data, streamed

  Yet, in the base image I don't see that initramfs config options set
  COMPRESS=lzma. Thus first boot is lzma, yet on package upgrades i
  guess initrd would be regenerated as gzip...

  Isn't the fact that all of our images use lzma and/or xz compression
  means we should switch Ubuntu default to lzma and/or xz as well?

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