[call for testing] kmod-devctl-jail

[Lars Engels]

On Fri, Jun 07, 2019 at 02:46:42AM +0200, Fabian Freyer wrote:
> Hi all,
> 
> I'd like to call for testing of the kernel module kmod-devctl-jail [1], 
> which adds devctl(4) support for jail state changes. The aim is to 
> provide some logging and/or auditing support as well as providing jail 
> managers with a way to get notified of jail state changes.
> 
> I'm not yet clear as to whether this is something that could/should get 
> upstreamed into base, or should better live in ports.
> 
> Please CC me when replying to this, as I am not subscribed to freebsd-jail at .
> 
> Thanks,
> Fabian
> 
> [1] https://github.com/fubarnetes/kmod_devctl_jail.git

I just gave it a shot and it can be a very useful tool IMHO.
Please create a review on Phabricator and maybe it can get added to
base.

Here's the log output produced from starting and stopping a jail:

var/log  tail -f jail 
Jun  7 23:01:01 nelson jail[314]: Jail JID=2 created
Jun  7 23:01:02 nelson jail[1720]: Process PID=1644 attached to Jail JID=2
Jun  7 23:01:12 nelson jail[46712]: Process PID=46535 attached to Jail JID=2
Jun  7 23:01:12 nelson jail[68454]: Jail JID=2 removed