Take a look at configuring multipating between the KVM server and the fileserver. You can take advantage of failover or just simply block IO until the fileserver returns to service, and then everything should resume normally.
It works for me. -geoff --------------------------------- Geoff Galitz Blankenheim NRW, Germany http://www.galitz.org/ http://german-way.com/blog/ > -----Original Message----- > From: open-iscsi@googlegroups.com [mailto:open-is...@googlegroups.com] On > Behalf Of Raimund Sacherer > Sent: Sonntag, 28. März 2010 10:29 > To: open-iscsi > Subject: iSCSI lvm and reboot > > > I am new to iSCSI and FilerSystems, but I am evaluating if it makes sense > for our clients. > > So I set up my testlab and created a KVM Server with 3 instances, > > 2 x Ubuntu (one for Zimbra LDAP, one for Zimbra Mailserver) > 1 x Ubuntu (with some OpenVZ virtual machines in it) > > These 3 KVM instances have RAW LVM disks which are on a Volume in the > iSCSI Filer. > > I tried yesterday to reboot the filer, without doing anything to the KVM > Machines, to simulate outage/human error. > > The reboot is fine and the iSCSI targets get exposed, but the KVM Servers > have their filesystems mounted readonly. > > Is there any way to get the LVM volumes on the KVM Server machine or > inside the KVM Virtualized servers back to R/W mode? > > I could not figure it out, vgchange -aly <storage> on the KVM server did > not change anything. > > Is the only way to handle this situation with a cold-reset of the KVM > Guests? As a reboot command was taking very long, i guess because of the > RO mounts i had to reset them. > > A push in the right direction regarding, e.g. doku, or any help is very > appreciated. > > > Thank you, > best > > - > RunSolutions > Open Source It Consulting > - > Email: r...@runsolutions.com > > Parc Bit - Centro Empresarial Son Espanyol > Edificio Estel - Local 3D > 07121 - Palma de Mallorca > Baleares > > -- > You received this message because you are subscribed to the Google Groups > "open-iscsi" group. > To post to this group, send email to open-is...@googlegroups.com. > To unsubscribe from this group, send email to open- > iscsi+unsubscr...@googlegroups.com. > For more options, visit this group at http://groups.google.com/group/open- > iscsi?hl=en. -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-is...@googlegroups.com. To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/open-iscsi?hl=en.
