[CRIU] Docker User Namespaces + CRIU

[Andrei Vagin]

On Tue, Oct 4, 2016 at 2:58 AM, Pavel Emelyanov <xemul at virtuozzo.com> wrote:
> On 09/30/2016 05:42 PM, Ross Boucher wrote:
>> hmm. That path should be just pointing to /dev/null.
>
> Then the "--ext-mount-map auto" ? :)

I think it is a bad idea to use "--ext-mount-map auto"  here. It may
solve this problem, but add other side effects.

I remember runc has a code to handle ext mounts, so we need to add
logic about these mounts too.

>
>> On Fri, Sep 30, 2016 at 5:59 AM Pavel Emelyanov <xemul at virtuozzo.com <mailto:xemul at virtuozzo.com>> wrote:
>>
>>     On 09/28/2016 05:18 PM, Ross Boucher wrote:
>>     > Hey all,
>>     >
>>     > I wanted to start playing around with user namespace support in Docker as part of seeing where checkpoint/restore currently works and doesn't work. Turns out things don't work currently, here's a checkpoint log:
>>     >
>>     > https://gist.github.com/boucher/768a74b236470e3d28a49990fe2f1665
>>
>>     Error (mount.c:716): mnt: 66:./proc/sched_debug
>>
>>     It's again the lack of --ext-mount-map option.
>>
>>     > Any thoughts on what might be going wrong?
>>     >
>>     > -Ross
>>     >
>>     >
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>>
>
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