Allgemeine Dokumentation zu Nutanix (EN)
Technical details of the Nutanix infrastructure at OVHcloud
Last updated 11th January 2022
Objective
This page provides an explanation of the elements that constitute a Nutanix cluster as delivered by OVHcloud and how it functions on the OVHcloud infrastructure.
Main characteristics
A Nutanix cluster consists of a stack of OVHcloud services:
Dedicated servers (3 minimum) are connected within the vRack which is an L2 network, the hosts (node) private network.
The public IP address of each node is not accessible since the Failover IP is dedicated to the Internet access. This access is ensured by the "OVHGateway" wich is a dedicated VM created by OVHcloud on your cluster.
The load balancer is used to expose the Prism Central WebUI to the public Internet. For security reasons, you are able to restrict the WebUI to IP addresses of your organisation.
Sizing
Your cluster requires some features to work properly. After delivery your cluster will have 5 VMs (for a 3 node cluster). Each node will have a "CVM". In the cluster you will find two more VMs: Prism Central and the OVHgateway.
Prism Central
Prism Central is deployed in the "small" configuration.
It can furthermore work in two modes: "Alone" (1 VM) or "Scale" (3 VM). It can manage up to 2500 VMs in general.
Alone mode: 6 vCPUs, 26 GB of memory, and 500 GiB of storage.Scale mode(for better resiliency and more capacity): 18 vCPUs, 78 GB of memory, and 1500 GiB of storage (combined).
In case of doubt, choose the "Alone" mode. You can always switch to "Scale" mode later.
CVMs
All CVMs require 32 GB of minimum memory and 12 vCPUs for each node. You will need to increase these values if you add new features on your cluster.
OVHgateway
The OVHgateway provides Internet access to the cluster via the Failover IP address.
This VM has two NICs, one for the private network (in the vRack) and the other one for the public Internet.
The VM uses NAT to route traffic from the private network to the Internet. You can therefore use it for outgoing traffic but not for incoming traffic.
OVHgateway has a lightweight design, using 1 vCPU, 1 GB memory and a 11 GiB disk.
Prism Central Access
Once the cluster is delivered, OVHcloud provides you with a FQDN for your cluster.
Acces to Prism Central is available under https://<fqdn>:9440. This access is provided through the load balancer.
Go further
Join our community of users on https://community.ovh.com/en/.
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