Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi, Thanks for the comment, I'll remove that encryption. I'm not using any cluster at all, just pure XEN+DRBD+LVM and I don't have fencing device either. The reason I configure allow-two-primaries is only want to use xen live migration when needed. The system will run on Primary/Secondary at all time, will change to Primary/Primary only when I need to do maintenance. This happen only when I remove the cable, if I do ifdown eth1, it won't happen. Regards Louis >________________________________ >From: Digimer <linux at alteeve.com> >To: Louis Voo <mailtolouis2020-forum at yahoo.com> >Cc: DRBD <drbd-user at lists.linbit.com> >Sent: Tuesday, August 16, 2011 5:55 PM >Subject: Re: [DRBD-user] Remove network cable causing system reboot > >On 08/16/2011 12:43 PM, Louis Voo wrote: >> Hi, >> >> I've 2 xen server setup using DRBD. The VM is run on the DRBD partition. >> Both server running on Centos 5.6 with 2 NIC, 1 NIC is use by DRBD >> direct connect to another server using cross over cable. One run on >> Primary mode and another run on Secondary Mode. >> Everything work fine so far, but we just found that when the VM is >> running and if we remove the cross over cable, the primary host will get >> reboot. >> >> Is it something to do to DRBD setup? > >Doesn't look like it, as you've not configured fencing. Are you running >a cluster proper? If so, what? If you do, and if that cluster is using >the DRBD link for cluster communication then breaking the link could be >triggering the cluster's fencing. > >A couple of comments: > >> net { >> allow-two-primaries; >> cram-hmac-alg sha1; >> shared-secret "123456"; > >You're on a dedicated link, so there is no real reason to add the >overhead of encryption. > >Secondly, whenever you have dual-primary, you *must* have fencing >configured. In EL5/DRBD 8.3.9 this is done with: > >===== > disk { > fencing resource-and-stonith; > } > handlers { > outdate-peer "/sbin/obliterate-peer.sh"; > } >===== > >Replace that script if you're not using red hat cluster service with a >script that will call the fence device of your choice. > >-- >Digimer >E-Mail: digimer at alteeve.com >Freenode handle: digimer >Papers and Projects: http://alteeve.com >Node Assassin: http://nodeassassin.org >"At what point did we forget that the Space Shuttle was, essentially, >a program that strapped human beings to an explosion and tried to stab >through the sky with fire and math?" > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20110816/cbc29791/attachment.htm>