Package: libvirt0 Version: 3.0.0-4+deb9u1 libvirt0 version 3.0.0-4+deb9u1 fails to migrate qemu guests that use disks with cache='directsync'
Directsync is necessary for us to maintain drbd data integrity. However, libvirt in the stable debian release prevents us from using that cache mode for live migration. This has been fixed in the git version: https://github.com/libvirt/libvirt/commit/fed9cc85eaff6f75e3d232e350d78a53f314815f#diff-6ec6f76d45ea0e7e9e53e36eac65a923 Here is my attempt at backporting that change: --- qemu_migration.c.orig 2017-11-30 15:58:34.143882478 +0100 +++ qemu_migration.c 2017-11-30 16:26:27.801361294 +0100 @@ -2377,7 +2377,8 @@ /* Our code elsewhere guarantees shared disks are either readonly (in * which case cache mode doesn't matter) or used with cache=none */ if (qemuMigrateDisk(disk, nmigrate_disks, migrate_disks) && - disk->cachemode != VIR_DOMAIN_DISK_CACHE_DISABLE) { + disk->cachemode != VIR_DOMAIN_DISK_CACHE_DISABLE && + disk->cachemode != VIR_DOMAIN_DISK_CACHE_DIRECTSYNC) { int rc; if (virDomainDiskGetType(disk) == VIR_STORAGE_TYPE_FILE) { @@ -2396,7 +2397,7 @@ virReportError(VIR_ERR_MIGRATE_UNSAFE, "%s", _("Migration may lead to data corruption if disks" - " use cache != none")); + " use cache != none or cache != directsync")); return false; } } Mit freundlichen Grüßen Carsten Burkhardt -- Dipl. Ing.Carsten Burkhardt | c.burkha...@b-c-s.de bcs kommunikationslösungen Inh. Dipl. Ing. Carsten Burkhardt Harz 51 | 06108 Halle (Saale) | Germany tel +49 345 29849-0 | fax +49 345 29849-22 www.b-c-s.de | www.halle.it | www.wivewa.de SIE MÖCHTEN EINFACH IHRE ADRESSEN, GEBURTSTAGE UND DOKUMENTE VERWALTEN UND TROTZDEM IHRE DATEN SICHER WISSEN. DANN ÜBERZEUGEN SIE SICH VON WIVEWA unter: www.wivewa.de
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