Bug#353053: watchdog: this needs to be resolved for xen when many domains need to be shut down
On Fri, Feb 09, 2007 at 09:42:26PM +1100, James Harper wrote: I thought of this as well... one at K01 and one at K99. K01 would create /etc/watchdog/shutdown, which watchdog would notice and not do any further network or process checks. K99 would actually stop the process. The startup script would automatically clear the shutdown file. Does that action of the rc files go against any Debian policies? Could you please try 5.2.6-7? I did not go this route but instead enabled the wd_keepalive binary which is a watchdog with just the keepalive routines. Michael -- Michael Meskes Email: Michael at Fam-Meskes dot De, Michael at Meskes dot (De|Com|Net|Org) ICQ: 179140304, AIM/Yahoo: michaelmeskes, Jabber: [EMAIL PROTECTED] Go SF 49ers! Go Rhein Fire! Use Debian GNU/Linux! Use PostgreSQL! -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Bug#353053: watchdog: this needs to be resolved for xen when many domains need to be shut down
On Fri, Feb 09, 2007 at 03:03:33PM +1100, James Harper wrote: Would it be possible for watchdog to detect a change to runlevel 0 or 6, and simply stop doing the checks which become unreliable once a shutdown has started? This behaviour could be controlled by a config option if necessary. And then make watchdog become the last daemon stopped? Yes, that might work. Hmm, thinking about it, it might even be better to do this with two programs. Thanks or this idea. Michael -- Michael Meskes Email: Michael at Fam-Meskes dot De, Michael at Meskes dot (De|Com|Net|Org) ICQ: 179140304, AIM/Yahoo: michaelmeskes, Jabber: [EMAIL PROTECTED] Go SF 49ers! Go Rhein Fire! Use Debian GNU/Linux! Use PostgreSQL! -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Bug#353053: watchdog: this needs to be resolved for xen when many domains need to be shut down
On Fri, Feb 09, 2007 at 03:03:33PM +1100, James Harper wrote: Would it be possible for watchdog to detect a change to runlevel 0 or 6, and simply stop doing the checks which become unreliable once a shutdown has started? This behaviour could be controlled by a config option if necessary. And then make watchdog become the last daemon stopped? Yes, that might work. Hmm, thinking about it, it might even be better to do this with two programs. I thought of this as well... one at K01 and one at K99. K01 would create /etc/watchdog/shutdown, which watchdog would notice and not do any further network or process checks. K99 would actually stop the process. The startup script would automatically clear the shutdown file. Does that action of the rc files go against any Debian policies? You'd also have to consider the possibility of races between watchdog noticing that a process has stopped, and noticing that /etc/watchdog/shutdown has been created. The only way around this I can think of is that you somehow make sure that watchdog has noticed that the file has been created before you let K01 finish. Maybe by having it in turn create a /etc/watchdog/shutdown_ack file. Checking the runlevel frequently in watchdog could be 'expensive' in terms of CPU (I think it needs to parse the utmp file), and even more 'expensive' in trying to prevent races. James
Bug#353053: watchdog: this needs to be resolved for xen when many domains need to be shut down
Package: watchdog Version: 5.2.6-6 Followup-For: Bug #353053 I'm having a problem where xen needs an unknown amount of time to shut down the virtual machines before it can shut down itself, which means shutting down watchdog when nowayout has been set causes a premature reboot. Would it be possible for watchdog to detect a change to runlevel 0 or 6, and simply stop doing the checks which become unreliable once a shutdown has started? This behaviour could be controlled by a config option if necessary. Thanks James -- System Information: Debian Release: 4.0 APT prefers testing APT policy: (500, 'testing') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.18-3-xen-686 Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Versions of packages watchdog depends on: ii debconf [debconf-2.0]1.5.11 Debian configuration management sy ii libc62.3.6.ds1-8 GNU C Library: Shared libraries ii makedev 2.3.1-83creates device files in /dev ii udev 0.103-2 /dev/ and hotplug management daemo watchdog recommends no packages. -- debconf information: * watchdog/run: true * watchdog/restart: false -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
