Nbdkit: nbd: error: disk does not contain MBR or GPT partition table signature

Packer
1

Hi - i’m hoping someone can provide some pointers on this problem i pretty regularly encounter. I am downloading an iso from RedHat, and not making any modifications to the pkr.hcl files. when i run make, it fails with the following error:


    qemu.centos7 (shell-local): Mounting root partition...
==> qemu.centos7 (shell-local): ++ DETECT_BLS_BOOT=0
==> qemu.centos7 (shell-local): ++ BOOT_MOUNT=/tmp/packer-maas-Bmof/boot
==> qemu.centos7 (shell-local): ++ echo 'Mounting root partition...'
==> qemu.centos7 (shell-local): ++ mount_part 1 /tmp/packer-maas-Bmof/root
==> qemu.centos7 (shell-local): ++ PART=1
==> qemu.centos7 (shell-local): ++ MOUNTPOINT=/tmp/packer-maas-Bmof/root
==> qemu.centos7 (shell-local): ++ FUSEDRV=fuse2fs
==> qemu.centos7 (shell-local): ++ DEV=/tmp/packer-maas-Bmof/p1
==> qemu.centos7 (shell-local): ++ mkdir -p /tmp/packer-maas-Bmof/root
==> qemu.centos7 (shell-local): ++ mkdir -p /tmp/packer-maas-Bmof/p1
==> qemu.centos7 (shell-local): ++ retries=0
==> qemu.centos7 (shell-local): ++ '[' -f /tmp/packer-maas-Bmof/p1/nbd ']'
==> qemu.centos7 (shell-local): ++ sleep 1
==> qemu.centos7 (shell-local): ++ nbdfuse /tmp/packer-maas-Bmof/p1 --command nbdkit -s nbd socket=/tmp/packer-maas-Bmof/qemu-img.sock --filter=partition partition=1
==> qemu.centos7 (shell-local): nbdkit: nbd: error: disk does not contain MBR or GPT partition table signature
==> qemu.centos7 (shell-local): nbd_connect_command: handshake: server has no export named '': No such file or directory
==> qemu.centos7 (shell-local): ++ (( ++retries > 10 ))
==> qemu.centos7 (shell-local): ++ '[' -f /tmp/packer-maas-Bmof/p1/nbd ']'
==> qemu.centos7 (shell-local): ++ sleep 1

has anyone seen this issue before?

thanks!