[pve-devel] [PATCH installer] fix behavior if zfs disks have no by-id path

[Fabian Ebner]

On 2/18/20 5:55 PM, Aaron Lauterer wrote:
> in some situations it is possible, that a disk does not have a
> /dev/disk/by-id path, mainly AFAICT inside VMs with virtio disks.
> 
> Commit e1b490865f750e08f6c9c6b7e162e7def9dcc411 forgot to handle this
> situation which resultet in a failed installation.
> 
> Signed-off-by: Aaron Lauterer <a.lauterer at proxmox.com>
> ---
> thanks @stoiko for helping me debugging this.
> 
> tested with ZFS (3 disks, raidz1) and ext4 in UEFI and BIOS
> mode.
> 
>   proxinstall | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/proxinstall b/proxinstall
> index c9d17f1..a87f1c7 100755
> --- a/proxinstall
> +++ b/proxinstall
> @@ -1357,7 +1357,7 @@ sub extract_data {
>   
>   	    foreach my $hd (@$devlist) {
>   		my $devname = @$hd[1];
> -		my $by_id = find_stable_path ("/dev/disk/by-id", $devname);
> +		my $by_id = find_stable_path ("/dev/disk/by-id", $devname) || $devname;
>

IMHO it feels a bit strange to assign $devname to the $by_id variable. 
Wouldn't it be nicer to instead do the replace below only conditionally?

>   		$vdev =~ s/ $devname/ $by_id/;
>   	    }
>