Hi,
adding also Sahina here.
AFAIK it should be enabled by default in hyper-converged deployments.

Can you please grep your deployment logs for ENABLE_LIBGFAPI?

On Thu, Nov 8, 2018 at 2:56 PM Mike Lykov <combr@ya.ru> wrote:
Hi All

I'm try to set up last ovirt version : ovirt-release42-pre.rpm repository
Then, I install these (and many deps) rpms:
ovirt-hosted-engine-setup-2.2.30-1.el7.noarch
ovirt-engine-appliance-4.2-20181026.1.el7.noarch
vdsm-4.20.43-1.el7.x86_64
vdsm-gluster-4.20.43-1.el7.x86_64
vdsm-network-4.20.43-1.el7.x86_64
All from that repository, and use webui installer for create glusterfs
volumes (default suggested engine, data, vmstore) and then install
hosted engine on that "engine" volume.

In cluster I want to use libgfapi gluster storage access method, but
when I import storages, created by installer at first step, VDSM mount
it on hosts with FUSE.

For Example
ovirtstor1.miac:/engine on
/rhev/data-center/mnt/glusterSD/ovirtstor1.miac:_engine type
fuse.glusterfs
(rw,relatime,user_id=0,group_id=0,default_permissions,allow_other,max_read=131072)

ovirtnode1.miac:/data on
/rhev/data-center/mnt/glusterSD/ovirtnode1.miac:_data type
fuse.glusterfs
(rw,relatime,user_id=0,group_id=0,default_permissions,allow_other,max_read=131072)

I see in config, And it is disabled (false)
[root@ovirtengine ~]# engine-config -a | grep -i libgf
LibgfApiSupported: false version: 3.6
LibgfApiSupported: false version: 4.0
LibgfApiSupported: false version: 4.1
LibgfApiSupported: false version: 4.2

Why? Its is needed to enable it by hand?

Like as in this presentation?
https://www.slideshare.net/DenisChapligin/improving-hyperconverged-performance

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