If a user or old software creates the flag file on the old CoreOS location,
nothing would happen.
Check the old location, too, so that Ignition is rerun.
Detect first boot based on the existence of a coreos/first_boot file
in the EFI partition, and set "coreos.first_boot=detected" command line
argument when found. We use "detected" rather than "1" so the initramfs
knows that it should mount the ESP and delete the file. This lets us
defer clearing the first-boot flag until Ignition has run successfully,
without having to change the disk GUID after filesystems are mounted.
Continue detecting the first-boot disk GUID and adding the command-line
argument to randomize it, since we still want unique disk GUIDs
regardless of Ignition.
Add a new grub variable extra_options, the contents of which is
added to the linux command line. Use extra_options to set
the ACPI options needed for arm64.
Signed-off-by: Geoff Levand <geoff@infradead.org>
If the gptprio.next command fails to give us something to boot we
shouldn't try! In order to diagnose why the failure happened halt
immediately so the user can see the error message.
The console often contains very useful information in the event of a
hard crash, in such situations there's no ability to unblank the console
via keypress because the kernel won't handle the interrupt.
Since CoreOS is a server/cluster operating system, there won't generally
be monitors connected benefitting from a blanked console. Disabling the
blanking altogether allows the frame buffer contents to always be
visible, even when the kernel can't handle keypresses.
coreos.first_boot=1 will no longer trigger disk-guid randomization, so
manual ignition triggers in diskless/pxe scenarios may succeed. Instead
we explicitly request the randomization when first_boot=1 was added by
grub finding the 00000000-0000-0000-0000-000000000001 disk-guid.
In order to boot properly we need `rootflags=rw mount.usrflags=ro` on
the command line. These have been build into the kernel directly but for
arm64 builds the built in options seem to be ignored.
Add the necessary variables in grub.cfg and populate the EFI
partition with arm64 efi executable and modules.
Signed-off-by: Andrej Rosano <andrej@inversepath.com>
The grub configuration needs some updates to handle dealing with booting
the kernel from the ESP rather than from inside the image. We also want to
be able to avoid dealing with signing the config file, so build it into the
binary. Finally, rather than having to cope with signing grub modules, build
the ones we need to boot into the grub image.
Probing all filesystem types on all block devices appears to hang
booting Amazon EC2 HVM instances. The console output is unreliably
buffered so there is no information on what the failure actually is. On
the up side we can work around it easily by only searching the GPT which
appears to be safe.
This uses our new GRUB2 features to handle GPT priority partition
selection, terminal selection, OEM tweaks, etc. The old SYSLINUX and
PV-GRUB configs are now unused except for maintaining compatibility
with older installs. Of the old configs only the ones that
coreos-postinst copies are needed. The new setup supports using GRUB2
under Xen, giving us automatic fallback support on all of our platforms
for the very first time!
Since grub.cfg is copied into place instead of generated, build_image's
--boot_args option is no longer supported. It could be re-added later
with some sed goo but for now it is easy enough to just edit grub.cfg.
This script replaces the standard grub-install tool to give us some more
control over what is going and ensure grub-install's auto-detection
magic doesn't make any incorrect choices. Also this script sets up a
loopback device and mounts the EFI partition in just the right way for
grub-bios-setup's auto-detection magic to work correctly.
I've chosen not to adapt disk_util to use partitioned loop devices to
make grub happy because ensuring loop devices get cleaned up properly
for the general case gets tricky and less robust.
Not currently used, this configuration which sets up grub to re-use the
syslinux configuration only works with recent git versions, not any
releases. Compatibility is also limited because the serial configuration
in syslinux must be duplicated in the grub config.
