第 2 章 Preparing RHEL to host virtual machines

Procedure

1. Install the virtualization hypervisor packages.

   # dnf install qemu-kvm libvirt virt-install virt-viewer

2. Start the virtualization services:

   # for drv in qemu network nodedev nwfilter secret storage interface; do systemctl start virt${drv}d{,-ro,-admin}.socket; done

Verification

1. Verify that your system is prepared to be a virtualization host:

   # virt-host-validate
   [...]
   QEMU: Checking for device assignment IOMMU support         : PASS
   QEMU: Checking if IOMMU is enabled by kernel               : WARN (IOMMU appears to be disabled in kernel. Add intel_iommu=on to kernel cmdline arguments)
   LXC: Checking for Linux >= 2.6.26                          : PASS
   [...]
   LXC: Checking for cgroup 'blkio' controller mount-point    : PASS
   LXC: Checking if device /sys/fs/fuse/connections exists    : FAIL (Load the 'fuse' module to enable /proc/ overrides)

2. If all virt-host-validate checks return a PASS value, your system is prepared for creating VMs.

   If any of the checks return a FAIL value, follow the displayed instructions to fix the problem.

   If any of the checks return a WARN value, consider following the displayed instructions to improve virtualization capabilities.