On Fri, Jun 3, 2022 at 11:03 AM Klaus Wenninger <kwenn...@redhat.com> wrote: > > On Fri, Jun 3, 2022 at 10:19 AM Zoran Bošnjak <zoran.bosn...@via.si> wrote: > > > > Hi all, > > I would appreciate an advice about sbd fencing (without shared storage). > > > > I am using ubuntu 20.04., with default packages from the repository > > (pacemaker, corosync, fence-agents, ipmitool, pcs...). > > > > HW watchdog is present on servers. The first problem was to load/unload the > > watchdog module. For some reason the module is blacklisted on ubuntu, so > > I've created a service for this purpose. > > > > --- file: /etc/systemd/system/watchdog.service > > [Unit] > > Description=Load watchdog timer module > > After=syslog.target > > > > [Service] > > Type=oneshot > > RemainAfterExit=yes > > ExecStart=/sbin/modprobe ipmi_watchdog > > ExecStop=/sbin/rmmod ipmi_watchdog > > > > [Install] > > WantedBy=multi-user.target > > --- > > > > Is this a proper way to load watchdog module under ubuntu? > > > > Anyway, once the module is loaded, the /dev/watchdog (which is required by > > 'sbd') is present. > > Next, the 'sbd' is installed by > > > > sudo apt install sbd > > (followed by one reboot to get the sbd active) > > > > The configuration of the 'sbd' is default. The sbd reacts to network > > failure as expected (reboots the server). However, when the 'sbd' is > > active, the server won't reboot normally any more. For example from the > > command line "sudo reboot", it gets stuck at the end of the reboot > > sequence. There is a message on the console: > > > > ... reboot progress > > [ OK ] Finished Reboot. > > [ OK ] Reached target Reboot. > > [ ... ] IPMI Watchdog: Unexpected close, not stopping watchdog! > > [ ... ] IPMI Watchdog: Unexpected close, not stopping watchdog! > > ... it gets stuck at this point > > > > After some long timeout, it looks like the watchdog timer expires and > > server boots, but the failure indication remains on the front panel of the > > server. If I uninstall the 'sbd' package, the "sudo reboot" works normally > > again. > > > > My question is: How do I configure the system, to have the 'sbd' function > > present, but still be able to reboot the system normally. > > Loading modules - depending on distribution an version - should probably > rather > be done editing /etc/modules or putting some files under /etc/modprobe-d/. Of course that would require removing the driver from blacklist. Any reason why you didn't consider that? > Guess in your case stopping the unit won't work as the watchdog-device is > still opened by sbd. In general I don't see why the watchdog-module should > be unloaded upon shutdown. So as a first try you just might remove that part. > > Klaus > > > > > regards, > > Zoran > > _______________________________________________ > > Manage your subscription: > > https://lists.clusterlabs.org/mailman/listinfo/users > > > > ClusterLabs home: https://www.clusterlabs.org/ > >
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