Archiving a server

gistfile1.sh

# Copy the filesystem:
rsync --numeric-ids --checksum --delete --archive --verbose --exclude /dev --exclude /proc --exclude /run --exclude /sys root@someserver:/ /mnt/tmp

# Create a squashfs image
mksquashfs /mnt/tmp someserver.squashfs -comp xz -noappend

# Create LVM volume
lvcreate --size $(stat --format %s someserver.squashfs)B --name old-someserver vg

# Archive image on LVM
cat someserver.squashfs >/dev/vg/old-someserver

# Make LVM volume read only
lvchange --permission r /dev/vg/old-someserver

# Verify archive
mount /dev/vg/old-someserver /mnt/tmp
rsync --dry-run --numeric-ids --archive --delete --checksum --itemize-changes --exclude /dev --exclude /proc --exclude /run --exclude /sys root@someserver:/ /mnt/tmp