[PATCH v2 1/3] tools: docker: Install a readable kernel for libguestfs-tools

[Alper Nebi Yasak]

On 14/06/2021 20:29, Heinrich Schuchardt wrote:
> On 6/13/21 4:07 PM, Alper Nebi Yasak wrote:
>>
>>      supermin: failed to find a suitable kernel (host_cpu=x86_64).
>>
>>      I looked for kernels in /boot and modules in /lib/modules.
>>
>> [...]
>>
>> diff --git a/tools/docker/Dockerfile b/tools/docker/Dockerfile
>> index d2f0074ee8a6..563b16639e54 100644
>> --- a/tools/docker/Dockerfile
>> +++ b/tools/docker/Dockerfile
>> @@ -71,6 +71,7 @@ RUN apt-get update && apt-get install -y \
>>   	libssl-dev \
>>   	libudev-dev \
>>   	libusb-1.0-0-dev \
>> +	linux-image-kvm \
>>   	lzma-alone \
>>   	lzop \
>>   	mount \
>> @@ -99,6 +100,9 @@ RUN apt-get update && apt-get install -y \
>>   	zip \
>>   	&& rm -rf /var/lib/apt/lists/*
>>
>> +# Make kernels readable for libguestfs tools to work correctly
>> +RUN chmod +r /boot/vmlinu* /lib/modules/*/vmlinu* || true
> 
> /lib/modules/4.15.0-1092-kvm# find . -name 'vm*'
> does not find any file.
> 
> We don't need '|| true' if you do not refer to non-existent files.

I included both dirs as libguestfs checks both of them. If that doesn't
convince you, I can send a v3 with just `chmod +r /boot/vmlinu*`.

I actually misread the error message above as mentioning both dirs for
kernel so I didn't explicitly write it in the commit message, but the
source code [1] confirms that both are checked.

[1]
https://github.com/libguestfs/supermin/blob/master/src/format_ext2_kernel.ml#L28-L49

(sorry for the late reply)