>>> Andrei Borzenkov <arvidj...@gmail.com> schrieb am 18.08.2020 um 09:24 in Nachricht <83aba38d-c9ea-1dff-e53b-14a9e0623...@gmail.com>: > 18.08.2020 10:10, Ulrich Windl пишет: >>>>> Ken Gaillot <kgail...@redhat.com> schrieb am 17.08.2020 um 17:19 in >> Nachricht >> <73d6ecf113098a3154a2e7db2e2a59557272024a.ca...@redhat.com>: >>> On Fri, 2020‑08‑14 at 15:09 +0200, Gabriele Bulfon wrote: >>>> Thanks to all your suggestions, I now have the systems with stonith >>>> configured on ipmi. >>> >>> A word of caution: if the IPMI is on‑board ‑‑ i.e. it shares the same >>> power supply as the computer ‑‑ power becomes a single point of >>> failure. If the node loses power, the other node can't fence because >>> the IPMI is also down, and the cluster can't recover. >> >> This may not always be true: We had servers with three(!) power supplies and > a >> BMC (what today is called "light-out management"). You could "power down" > the >> server, while the BMC was still operational (and thus could "power up" the >> server again). >> With standard PC architecture these days things seem to be a bit more >> compicated (meaning "primitive")... >> > > BMC is powered by standby voltage. If AC input to all of your power > supplies is cut off, there is no standby voltage anymore. Just try to > unplug all power cables and see if BMC is still accessible.
Of course! What I tried to point out is: With a proper BMC, you DON'T need to cut off the server power. Regards, Ulrich > _______________________________________________ > Manage your subscription: > https://lists.clusterlabs.org/mailman/listinfo/users > > ClusterLabs home: https://www.clusterlabs.org/ _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/