Hi to everyone.
I've got a strange problem with a gluster setup: 3 nodes with Centos
7.4, Gluster 3.12.4 from Centos/Gluster repositories, QEMU-KVM version
2.9.0 (compiled from RHEL sources).
I'm running volumes in replica 3 arbiter 1 mode (but I've got a volume
in "pure" replica 3 mode too). I've applied the "virt" group settings to
my volumes since they host VM images.
If I try to install something (eg: Ubuntu Server 16.04.3) on a VM (and
so I generate a bit of I/O inside it) and configure KVM to access
gluster volume directly (via libvirt), install fails after a while
because the disk content is corrupted. If I inspect the block inside the
disk (by accessing the image directly from outside) I can found many
files filled with "^@".
If, instead, I configure KVM to access VM images via a FUSE mount,
everything seems to work correctly.
Note that the problem with install is verified 100% time with QCOW2
image, while it appears only after with RAW disk images.
Is there anyone who experienced the same problem ?
Thank you,
--
Ing. Luca Lazzeroni
Responsabile Ricerca e Sviluppo
Trend Servizi Srl
Tel: 0376/631761
Web: https://www.trendservizi.it
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