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cloud-init: use qemu-img dd instead of nbd

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We now have a patch on top of qemu to allow 'qemu-img dd'
to read from stdin when specifying input and output sizes,
as well as a way to tell it that the size of the source is
not known.

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2018-02-23 10:27:30 +01:00
parent 0c9a7596f6
commit 3db6e4ab70
1 changed files with 4 additions and 26 deletions
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30
PVE/QemuServer/Cloudinit.pm
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@ -11,36 +11,14 @@ use PVE::Tools qw(run_command file_set_contents);
use PVE::Storage;
use PVE::QemuServer;
sub nbd_stop {
my ($vmid) = @_;
PVE::QemuServer::vm_mon_cmd($vmid, 'nbd-server-stop');
}
sub next_free_nbd_dev {
for(my $i = 0;;$i++) {
my $dev = "/dev/nbd$i";
last if ! -b $dev;
next if -f "/sys/block/nbd$i/pid"; # busy
return $dev;
}
die "unable to find free nbd device\n";
}
sub commit_cloudinit_disk {
my ($file_path, $iso_path, $format) = @_;
my $nbd_dev = next_free_nbd_dev();
run_command(['qemu-nbd', '-c', $nbd_dev, $iso_path, '-f', $format]);
my $size = PVE::Storage::file_size_info($iso_path);
eval {
run_command([['genisoimage', '-R', '-V', 'config-2', $file_path],
['dd', "of=$nbd_dev", 'conv=fsync']]);
};
my $err = $@;
eval { run_command(['qemu-nbd', '-d', $nbd_dev]); };
warn $@ if $@;
die $err if $err;
run_command([['genisoimage', '-R', '-V', 'config-2', $file_path],
['qemu-img', 'dd', '-f', 'raw', '-O', $format,
'isize=0', "osize=$size", "of=$iso_path"]]);
}
sub generate_cloudinitconfig {