Filesystems like NFS and CIFS require "helper" utilities (i.e.
`mount.nfs` and `mount.cifs`, respectively). These need to be installed
in order for a system to be able to mount those filesystems.
The current shared storage system uses NFSv4, and as such, the
*nfs-utils* package needs to be installed on the VM hosts.
With the transition away from *dhcpcd* on the VM hosts, there is no
longer any need for a custom wait script that must run prior to
attempting to mount the shared filesystem. This dramatically simplifies
the configuration necessary for shared storage.
I don't really see any reason why the shared storage configuration needs
to be managed by a separate role. The *vmhost* role is not really
generic anyway, and will probably not work for any other VM host
deployment besides the two machines running now. As such, I think it
makes sense to move the task to mount the shared filesystem into the
*vmhost* role and drop the *dch-storage-net* role.
The *libvirt-daemon-driver-network* package provides support for
managing virtual networks with libvirt. It is necessary in order to use
managed networks in VM configuration, as opposed to directly specifying
VM network interfaces in their domain configuration.
This commit adds a systemd unit to enable the Kernel Same-page Merging
daemon on VM hosts. This allows much greater virtual machine density,
especially when many VMs are running the same guest OS.
Dustin