[PATCH 1/1] Dockerfile: provide kernel for libguestfs-tools

[Heinrich Schuchardt]

Am 14. Juli 2020 00:50:56 MESZ schrieb Tom Rini <trini at konsulko.com>:
>On Tue, Jul 14, 2020 at 12:09:37AM +0200, Heinrich Schuchardt wrote:
>
>> The libguestfs-tools use QEMU to mount an image file. This requires a
>Linux
>> kernel.
>> 
>> Install a kernel and make vmlinuz readable.
>> 
>> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
>> ---
>>  Dockerfile | 4 ++++
>>  1 file changed, 4 insertions(+)
>> 
>> diff --git a/Dockerfile b/Dockerfile
>> index bc3cdee..aac7f01 100644
>> --- a/Dockerfile
>> +++ b/Dockerfile
>> @@ -68,6 +68,7 @@ RUN apt-get update && apt-get install -y \
>>  	libssl-dev \
>>  	libudev-dev \
>>  	libusb-1.0-0-dev \
>> +	linux-image-kvm \
>>  	lzma-alone \
>>  	lzop \
>>  	mount \
>> @@ -94,6 +95,9 @@ RUN apt-get update && apt-get install -y \
>>  	zip \
>>  	&& rm -rf /var/lib/apt/lists/*
>> 
>> +# libguestfs-tools runs the kernel via QEMU. Give normal users
>access.
>> +RUN chmod 644 /boot/vmlinu*
>> +
>>  # Manually install libmpfr4 for the toolchains
>>  RUN wget
>http://mirrors.kernel.org/ubuntu/pool/main/m/mpfr4/libmpfr4_3.1.4-1_amd64.deb
>&& dpkg -i libmpfr4_3.1.4-1_amd64.deb && rm libmpfr4_3.1.4-1_amd64.deb
>
>I'm not super happy with having to work-around Ubuntu's breakage here.
>I assume we can't just write the tools to do sudo ... in the case of
>this silliness?

I do not want any sudo in scripts I run on my personal machine. The very idea of libguestfs-tools is to work in user space.

The kernel is used to run QEMU.

>
>At least we need to reference the Ubuntu bug I posted about the other
>day in the commit message.

It is not a bug, it is a (questionable) feature of Ubuntu. I described the reason for chmod in the code. What are you missing there?

Best regards

Heinrich