Re: debootrap error

[Jan Kiszka <jan.kiszka@siemens.com>]

On 19.03.19 11:14, Henning Schild wrote:
> Am Mon, 18 Mar 2019 11:18:54 +0100
> schrieb "[ext] Jan Kiszka" <jan.kiszka@siemens.com>:
> 
>> On 18.03.19 11:17, Claudius Heine wrote:
>>> Hi,,
>>>
>>> On 18/03/2019 11.14, akihiro27.suzuki@toshiba.co.jp wrote:
>>>> Hi,
>>>>   
>>>>> That's a good hint: Suzuki-san, could you check if binfmt_misc is
>>>>> available as
>>>>> kernel feature/module on that machine? There may also be some
>>>>> warning during the
>>>>> container startup.
>>>> I checked it and maybe it is available.
>>>>
>>>>       $ mount | grep binfmt
>>>>       systemd-1 on /proc/sys/fs/binfmt_misc type autofs
>>>> (rw,relatime,fd=31,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=18804)
>>>>       binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc
>>>> (rw,relatime) $ lsmod | grep binfmt
>>>>       binfmt_misc            20480  1
>>>>       $ cat /boot/config-4.15.0-46-generic  | grep BINFMT
>>>>       CONFIG_BINFMT_ELF=y
>>>>       CONFIG_COMPAT_BINFMT_ELF=y
>>>>       CONFIG_BINFMT_SCRIPT=y
>>>>       CONFIG_BINFMT_MISC=m
>>>>       $ ls /proc/sys/fs/binfmt_misc/
>>>>       python2.7     qemu-armeb       qemu-mips64      qemu-ppc64le
>>>> qemu-sparc        status
>>>>       python3.5     qemu-cris        qemu-mips64el    qemu-riscv32
>>>> qemu-sparc32plus
>>>>       python3.6     qemu-hppa        qemu-mipsel      qemu-riscv64
>>>> qemu-sparc64 qemu-aarch64  qemu-m68k        qemu-ppc
>>>> qemu-s390x    qemu-xtensa qemu-alpha    qemu-microblaze
>>>> qemu-ppc64       qemu-sh4      qemu-xtensaeb qemu-arm
>>>> qemu-mips        qemu-ppc64abi32  qemu-sh4eb    register $
>>>> cat /proc/sys/fs/binfmt_misc/status enabled
>>>
>>> That is how my qemu-arm setting looks like. Do you have a different
>>> qemu path?
>>
>> Even if, it shouldn't be after starting the container: We allow it to
>> adjust the system-wide binfmt configuration (one reason for
>> --privileged).
> 
> We really need a kernel patch for a binfmt cgroup/namespace.
> 

I don't disagree. I have no idea how much effort that would mean. Maybe it's 
worth asking around on LKML for suggestions.

In any case, it will take 2 year - at least - to have that available in all 
major distros.

Jan

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