Hi Lorentz,
On 9/2/21 13:48, Lorenz wrote:
Few months ago I sent a patch for needrestart, and there is a function
(line 66) there to detect if it's running in a container; i'm not sure
that is something that was not already mentioned and discarded here,
but maybe it's worth checking.
I see..., it's written in perl and verifies the existence of
/proc/1/environ:
if (-r "/proc/1/environ") {
# check if we are inside of a container (fallback)
local $/;
open(HENV, '<', '/proc/1/environ');
$is_container = scalar(grep {/^container=/;} unpack("(Z*)*", <HENV>));
close(HENV)
}
In fact, there are several methods for detecting whether or not we are
within a container depending on the type of the container (for instance,
docker creates a |.dockerenv|||file in the root directory of the hosted
system),
and some of the scripts available on the web evaluate each possibility
separately for increased robustness. I think that VM are where things
get more complicated. I have some vague ideas for that,
being one of them related to the ram memory, but i still didn't spend
time on that.
Il giorno dom 3 gen 2021 alle ore 10:41 aitor <[email protected]
<mailto:[email protected]>> ha scritto:
I don't know. But, as far as i know, this question arises from the
developers of runit.
Side question: where/who are the developers of runit?
The original author of runit seems to be Gerrit Pape:
http://smarden.org/runit/ <http://smarden.org/runit/>
but other people like Dmitry Bogatov or Britney might be involved
somehow in the project, at least as debian package mantainers.
And Lorenzo Puliti, maybe?
I'm planning extensive development for the next cycle
(Debian/Bookworm) so we probably should coordinate at least to make
sure that we don't step on each other foot
Regards,
Lorenzo
Quoting Svante Signell:
/> I'm trying to solve the problem of detecting if you are within a
container, like
> docker or LXC when running the eudev init script. If true udevd
should not be
> cstarted. The current version of eudev (3.2.9-4) has a buggy check for
> containers, and people running runit as init have problems, see #392./
Maybe i misunderstood him and made up my mind that developers of runit
were beyond this issue, while Svante was clearly referring to the users.
Whatever the case, i also would like to know about a possible mailing
list and we would meet each other there for sure :)
Cheers,
Aitor.
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