[Bug 1720217] Re: Allow building images with kernels without initrd

[Steve Langasek]

** Description changed:

+ [SRU Justification]
+ initramfsless boot is an important enhancement to decrease boot times and increase density for cloud images.  Unfortunately, live-build assumes that an initramfs is used, and image builds fail if it is not present.  Fix this so that these improvements can be applied to the LTS, which represents the vast majority of cloud instances.
+ 
+ [Original description]
  Lb may fail when creating an image with a kernel not requiring, hence initramfs-tools not building initrd.
  ...
  P: Begin installing local package lists...
  [2017-09-28 15:55:06] lb_binary_linux-image
  P: Begin install linux-image...
  cp: cannot stat 'chroot/boot/initrd.img-*': No such file or directory
  P: Begin unmounting filesystems...
  P: Saving caches...
  Reading package lists...
  Building dependency tree...
  ...

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https://bugs.launchpad.net/bugs/1720217

Title:
  Allow building images with kernels without initrd

Status in live-build package in Ubuntu:
  Fix Released
Status in live-build source package in Xenial:
  Triaged

Bug description:
  [SRU Justification]
  initramfsless boot is an important enhancement to decrease boot times and increase density for cloud images.  Unfortunately, live-build assumes that an initramfs is used, and image builds fail if it is not present.  Fix this so that these improvements can be applied to the LTS, which represents the vast majority of cloud instances.

  [Original description]
  Lb may fail when creating an image with a kernel not requiring, hence initramfs-tools not building initrd.
  ...
  P: Begin installing local package lists...
  [2017-09-28 15:55:06] lb_binary_linux-image
  P: Begin install linux-image...
  cp: cannot stat 'chroot/boot/initrd.img-*': No such file or directory
  P: Begin unmounting filesystems...
  P: Saving caches...
  Reading package lists...
  Building dependency tree...
  ...

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