Il 18-08-2017 17:22 Veit Wahlich ha scritto:
Yes, I regard qemu -> DRBD -> volume management [-> RAID] -> disk the most recommendable solution for this scenario. I personally go with LVM thinp for volume management, but ZVOLs should do the trick, too. With named ressources (named after VMs) and multiple volumes per ressource (for multiple VM disks), this works very well for us for hundreds of VMs. Having a cluster-wide unified system for numbering VMs is very advisable, as it allows to calculate the ports and minor numbers for both DRBD and KVM/qemu configuration. Example: * numbering VMs from 0 to 999 as <num>, padded with leading zeros * numbering volumes from 0 to 99 as <vol>, padded with leading zeros * DRBD ressource port: 10<num> * VNC/SPICE unencrypted port: 11<num> * SPICE TLS port: 12<num> * DRBD minor: <num><volume> Let's say your VM gets number 123, it has 3 virtual disks and uses VNC: * DRBD ressource port: 10123 * VNC port: 11123 * DRBD minor of volume/VM disk 0: 12300 * DRBD minor of volume/VM disk 1: 12301 * DRBD minor of volume/VM disk 2: 12302 Best regards, // Veit
Hi Veit, excellent advises! Thank you. -- Danti Gionatan Supporto Tecnico Assyoma S.r.l. - www.assyoma.it email: g.da...@assyoma.it - i...@assyoma.it GPG public key ID: FF5F32A8 _______________________________________________ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user
