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file-restore: add debug mode with serial access

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Set PBS_QEMU_DEBUG=1 on a command that starts a VM and then connect to
the debug root shell via:
  minicom -D \unix#/run/proxmox-backup/file-restore-serial-10.sock
or similar.

Note that this requires 'proxmox-backup-restore-image-debug' to work,
the postinst script is updated to also generate the corresponding image.

Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
This commit is contained in:
Stefan Reiter
2021-05-06 17:26:16 +02:00
committed by Thomas Lamprecht
parent 5e91b40087
commit 572cd0381b
3 changed files with 62 additions and 9 deletions
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12
debian/proxmox-backup-file-restore.postinst vendored
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@ -6,6 +6,7 @@ update_initramfs() {
# regenerate initramfs for single file restore VM
INST_PATH="/usr/lib/x86_64-linux-gnu/proxmox-backup/file-restore"
CACHE_PATH="/var/cache/proxmox-backup/file-restore-initramfs.img"
CACHE_PATH_DBG="/var/cache/proxmox-backup/file-restore-initramfs-debug.img"
# cleanup first, in case proxmox-file-restore was uninstalled since we do
# not want an unuseable image lying around
@ -20,7 +21,7 @@ update_initramfs() {
# avoid leftover temp file
cleanup() {
rm -f "$CACHE_PATH.tmp"
rm -f "$CACHE_PATH.tmp" "$CACHE_PATH_DBG.tmp"
}
trap cleanup EXIT
@ -34,6 +35,15 @@ update_initramfs() {
| cpio -o --format=newc -A -F "$CACHE_PATH.tmp" )
mv -f "$CACHE_PATH.tmp" "$CACHE_PATH"
if [ -f "$INST_PATH/initramfs-debug.img" ]; then
echo "Updating file-restore debug initramfs..."
cp "$INST_PATH/initramfs-debug.img" "$CACHE_PATH_DBG.tmp"
( cd "$INST_PATH"; \
printf "./proxmox-restore-daemon" \
| cpio -o --format=newc -A -F "$CACHE_PATH_DBG.tmp" )
mv -f "$CACHE_PATH_DBG.tmp" "$CACHE_PATH_DBG"
fi
trap - EXIT
}