1:44 p.m.
On 5/20/21 14:09, Michael Ivanov wrote:
Yes it is 256:
island:backend [master]> cat /proc/sys/fs/mqueue/msg_max
256
On 20.05.2021 21:00, Daniel Walsh wrote:
> On 5/20/21 08:29, Michael Ivanov wrote:
>> Hallo!
>>
>> I'm trying to run my application in podman rootless container and I
>> stumble
>> on following problem: my program needs /proc/sys/fs/mqueue/msg_max
>> to be at
>> least 256, but in running container this value is just 10. When I
>> try to
>> specify this parameter while running the image (--sysctl
>> 'fs.mqueue.msg_max=256')
>> I get the following error:
>>
>> Error: open /proc/sys/fs/mqueue/msg_max: Permission denied: OCI
>> permission denied
>>
>> and container is not created.
>>
>> My host where container is being run has this parameter set to 256.
>> How can I
>> expose current host setting for msg_max to my container?
>>
>> Best regards,
>
> When you login to your user account is is et to 256?
>
>
> $ cat /proc/sys/fs/mqueue/msg_max
> 10
Ok I just recreated it, I think the issue is that we create a new procfs
within the container, But it looks like this should be namespaced.
Works in rootfull mode, but not in rootless.
# podman run --sysctl 'fs.mqueue.msg_max=256' fedora cat
/proc/sys/fs/mqueue/msg_max
256
#
exit
podman (kube) $ podman run --sysctl 'fs.mqueue.msg_max=256' fedora cat
/proc/sys/fs/mqueue/msg_max
256
Error: open /proc/sys/fs/mqueue/msg_max: Permission denied: OCI
permission denied
bash: 256: command not found...
If this is blocked by the kernel, it might be a kernel bug. Since
theoretically this is a namespaced object and should be modifiable
within the container at least up to the size the user is able to use.
Giuseppe what do you think?
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--
\ / | |
(OvO) | Михаил Иванов |
(^^^) | |
\^/ | E-mail:ivans@isle.spb.ru |
^ ^ | |
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