[Box-Admins] Re: [squeak-dev] cogspurlinuxht under daemontools
eliot.miranda at gmail.com
Thu Jul 16 18:52:05 UTC 2015
can you confirm? If it does, I'll add it to the relevant readmes.
On Thu, Jul 16, 2015 at 11:39 AM, Levente Uzonyi <leves at elte.hu> wrote:
> This should work, because the daemontools start script is executed by
> root. I assume that it's enough to the highest priority to 2, so the
> following should work:
> ulimit -r 2
> exec setuidgid <account> <ht_vm_executable> <image> ...
> On Wed, 15 Jul 2015, Eliot Miranda wrote:
> Hi Chris,
>> On Wed, Jul 15, 2015 at 9:17 AM, Chris Muller <ma.chris.m at gmail.com>
>> On Sat, Jul 11, 2015 at 4:30 PM, Eliot Miranda <
>> eliot.miranda at gmail.com> wrote:
>> > Hi Chris,
>> > I really know very little about this. I don't understand the
>> mechanism. But I'm told that the limits file takes effect on login. i.e.
>> if the file is created while a user is logged in it
>> won't take effect for that user until that user logs out and logs
>> back in again and only applies to those sessions that logged in once the
>> file had been created. I /dont/ know whether su sets up
>> a new session. i should try that experiment.
>> > So perhaps you could have daemon tools run login or su to create
>> a new session and see if the ht version can be run by daemontools in that
>> session. Presumably daemons launched at boot aren't in
>> the right state. (What an absurdity they've invented here).
>> Good suggestion to try, unfortunately it didn't work. I tried
>> in as root to see if it would "initialize" that account to have
>> permissions, then logging out and starting the daemon. Same error.
>> "At this time, you can't. limits.conf(5) is the configuration
>> for pam_limits(8), which is activated by the PAM stack according to the
>> configuration in /etc/pam.d. However, start-stop-daemon(8) as launched
>> from an init.d script doesn't pass through the PAM stack, so those kinds
>> of settings are never applied.
>> Debian bug #302079 contains a patch to enable setting limits
>> from start-stop-daemon(8), but the bug has been open since 2005 and the
>> patch hasn't been merged yet.
>> While not ideal, AFAIK the recommended way to accomplish this right now
>> is to add a ulimitcall in your init.d script."
>> Looks like this is settable via ulimit -r; From man ulimit(1) (actually
>> from bash (1))
>> -r The maximum real-time scheduling priority
>> Of course this may not work:
>> ulimit -r 3$
>> -bash: ulimit: real-time priority: cannot modify limit: Operation not
>> But it's worth a try.
>> For the sake of progress, I've switched to using the ITHB vm.
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