Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
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.danti at assyoma.it - info at assyoma.it GPG public key ID: FF5F32A8