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1. Install relevant package for the operating system, either CentOS for KVM or RHEL (Red Hat Enterprise Linux) for KVM-based OpenStack, that you use:
   • In your CentOS environment, verify that you have already installed the device-mapper package. If not, run the following commands to install the package:
     yum install device-mapper
service libvirtd restart
   • In your RHEL environment, verify that you have already installed the gnome package. If not, you can run the following commands to install the package:
     yum group list
The above command lists all available installation groups on the RHEL environment. Next, run the following command to install gnome package:
     yum groupinstall 'Server with GUI'
Alternatively, you can use the following command to install only the core gnome package:
     yum groupinstall 'X Window System' 'GNOME'
2. Download the qcow2 file from the Infoblox Technical Support site. For information, see the Requirements section.
3. Install the vNIOS virtual appliance in KVM-only or KVM-based OpenStack environment, as described in the following sections:
   • For KVM, see see Installing vNIOS Virtual Appliance in the KVM Environment.
   • For KVM-based OpenStack, see see Installing vNIOS for KVM in the OpenStack Environment.
4. Configure and start the vNIOS virtual appliance, as described in the following sections:
   • For KVM, see see Configuring the vNIOS Instance in the KVM Environment.

   • For KVM-based OpenStack, see see Starting a vNIOS Instance in OpenStack Environment.

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