VirtualBox Guest Additions: modprobe vboxsf failed

[Robert Wang]

I am trying to build ubuntu dev box using packer, this virtualbox guest installation is one of script:

ubuntu-vbguest.sh

export DEBIAN_FRONTEND=noninteractive

apt-get install -y -q gcc build-essential

mount -o loop,ro VBoxGuestAdditions.iso /mnt
yes | sudo sh /mnt/VBoxLinuxAdditions.run
umount /mnt

it always failed and exited from packer, 

virtualbox-iso: VirtualBox Guest Additions installer
    virtualbox-iso: Copying additional installer modules ...
    virtualbox-iso: Installing additional modules ...
    virtualbox-iso: VirtualBox Guest Additions: Building the VirtualBox Guest Additions kernel modules.
    virtualbox-iso: VirtualBox Guest Additions: Running kernel modules will not be replaced until the system is restarted
    virtualbox-iso: VirtualBox Guest Additions: Starting.
    virtualbox-iso: VirtualBox Guest Additions: modprobe vboxsf failed
==> virtualbox-iso: Step "StepProvision" failed

ubuntu iso 

ubuntu-17.10-server-amd64.iso

$ packer version

Packer v1.1.3

I run on win7 + msys64 

virtualbox 5.2.4 

Even I run above guest installation inside vm, will get same error - modprobe vboxsf failed, need to reboot vm once then vboxsf show up.

So question is how can I make VBoxGuestAdditions installed in packer script without any manual work?

Thanks.

BR/

Robert

[Rickard von Essen]

Most likely this is because you are building against a newer kernel version that you just installed (with apt-get update etc) but is not yet running since you haven't rebooted.

See how bento does it:

https://github.com/chef/bento/blob/master/_common/virtualbox.sh

https://github.com/chef/bento/blob/master/ubuntu/scripts/update.sh

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[Robert Wang]

Thanks this is the easy way what I am looking for to by pass the unwanted exit code.