On Thu, 2012-10-25 at 20:30 -0500, Serge Hallyn wrote: > Quoting Michael H. Warfield (m...@wittsend.com): > > On Thu, 2012-10-25 at 23:38 +0200, Lennart Poettering wrote: > > > On Thu, 25.10.12 11:59, Michael H. Warfield (m...@wittsend.com) wrote: > > > > > > I've got some more problems relating to shutting down containers, some > > > > of which may be related to mounting tmpfs on /run to which /var/run is > > > > symlinked to. We're doing halt / restart detection by monitoring utmp > > > > in that directory but it looks like utmp isn't even in that directory > > > > anymore and mounting tmpfs on it was always problematical. We may have > > > > to have a more generic method to detect when a container has shut down > > > > or is restarting in that case. > > > > > I can't parse this. The system call reboot() is virtualized for > > > containers just fine and the container managaer (i.e. LXC) can check for > > > that easily. > > > > The problem we have had was with differentiating between reboot and halt > > to either shut the container down cold or restarted it. You say > > "easily" and yet we never came up with an "easy" solution and monitored > > utmp instead for the next runlevel change. What is your "easy" solution > > for that problem?
> I think you're on older kernels, where we had to resort to that. Pretty > recently Daniel Lezcano's patch was finally accepted upstream, which lets > a container call reboot() and lets the parent of init tell whether it > called reboot or shutdown by looking at wTERMSIG(status). Now THAT is wonderful news! I hadn't realized that had been accepted. So we no longer need to rely on the old utmp kludge? > -serge Regards, Mike -- Michael H. Warfield (AI4NB) | (770) 985-6132 | m...@wittsend.com /\/\|=mhw=|\/\/ | (678) 463-0932 | http://www.wittsend.com/mhw/ NIC whois: MHW9 | An optimist believes we live in the best of all PGP Key: 0x674627FF | possible worlds. A pessimist is sure of it!
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