Interligação de clusters através do vRack (EN)

Objective

This guide will show you how to interconnect two Nutanix clusters Provided by OVHcloud across the same vRack in two remote OVHcloud sites. In this guide, the connection is made between the Gravelines and Roubaix datacentres.

Requirements

• You must be logged in to your OVHcloud Control Panel.
• You must be connected to your clusters via Prism Central.

Instructions

We are going to interconnect two remote Nutanix clusters, one in Gravelines and the other in Roubaix through the same vRack.
See our vRack overview to learn more about the OVHcloud vRack solution.

Preparing both clusters before interconnection

Before connecting the two clusters, ensure that they use different IP addresses (except for the gateway) on the same IP address range.
In our guide, we will use the address range 192.168.0.0/22.

The Gravelines cluster uses these addresses:

• Server 1: CVM VM address 192.168.2.1, AHV hypervisor IP address 192.168.2.21.
• Server 2: CVM VM address 192.168.2.2, AHV hypervisor IP address 192.168.2.22.
• Server 3: CVM VM address '192.168.2.3', AHV hypervisor IP address 192.168.2.23.
• Virtual address of Prism Element: 192.168.2.100.
• Prism Central IP address:192.168.2.101.
• Gateway: 192.168.2.254.
• Cluster version: 6.1.

The Roubaix cluster uses these addresses:

• Server 1: CVM VM address 192.168.1.1, AHV hypervisor IP address 192.168.1.21.
• Server 2: CVM VM address 192.168.1.2, AHV hypervisor IP address 192.168.1.22.
• Server 3: CVM VM address 192.168.1.3, AHV hypervisor IP address 192.168.1.23.
• Virtual address of Prism Element: 192.168.1.100.
• Prism Central IP address:192.168.1.101.
• Gateway: 192.168.2.254.
• Cluster version: 6.1.

Use our guide on customised redeployment of your Cluster.

Shutting down the OVHgateway virtual machine.

The outgoing internet connection is provided by OVHgateway virtual machines with the same private IP address on both sites. We will stop the OVHcloud Virtual Machine Gateway in Roubaix. This virtual machine will no longer be needed.

The outgoing internet connection will be restored when the connection through the vRack is made.

Log in to the cluster Prism Central interface located in Roubaix.

Go to the virtual machine management section, select OVHgateway from the Actions menu and click Guest Shutdown.

Access to Prism Central is maintained using the Load Balancer.

Configuring vRacks

This operation involves deleting the vRack assignment in Roubaix and then extending the vRack from Gravelines to Roubaix. You can modify the vRack via the OVHcloud Control Panel.

Log in to your OVHcloud Control Panel.

Deleting Roubaix vRack elements.

From the Hosted Private Cloud menu, select the Roubaix cluster on the left in the Nutanix category and note the name of the vRack which is under Private network (vRack).

Go to the Bare Metal Cloud menu, click on the vRack concerned below the vRack option (in the Network submenu).

Select all the elements that are in your vRack:

• Dedicated servers
• IPs
• the Load Balancer

Write them down and click Remove

Adding deleted items from the Roubaix vRack into the Gravelines vRack

Go back to the Hosted Private Cloud menu, choose the Gravelines cluster from the Nutanix category and note the name of the vRack under Private network (vRack).

Go to the Bare Metal Cloud menu, select the vRack from Gravelines below the vRack option (from the Network submenu).

Select these elements from the Roubaix cluster:

• Physical servers
• the public IP.

Then click Add.

The vRack that was only used by the servers in the Gravelines cluster is now used on both sites and contains:

• The physical servers of the two clusters.
• The public IP addresses of the two clusters.
• The Gravelines Load Balancer, used for Prism Central.

Outgoing internet access on the Roubaix website is again available through the vRack and the OVHgateway virtual machine in Gravelines. Access to Prism Central for the Roubaix cluster is currently inaccessible.

Modifying the Roubaix Load Balancer

We will reconfigure the Roubaix Load Balancer to work with the vRack shared by both sites, so that it can access Prism Central for the Roubaix cluster.

In the Bare Metal Cloud menu, select the Roubaix Load Balancer from the Load Balancer submenu.

Go to Private networks, click on the ... to the right of the existing private network.

Click Delete.

Click Delete again at the confirmation request.

Click Enable to the right of vRack.

Select Existing, select the vRack that is common to both sites, and click on Enable.

Click Add Private Network.

Choose these values:

• Name (optional): Private network name.
• VLAN ID: Nutanix management network VLAN, normally 1.
• Subnet: Private network LAN 192.168.0.0/22.
• NatIP: Address range used by the Load Balancer 192.168.2.128/27.
• Name: NutaCluster-all.

Then click Add.

A yellow banner appears, indicating that the configuration has not been applied. Click Apply Configuration.

Select the Roubaix(RBX) datacentre and click on Apply configuration.

The Load Balancer is connected to the vRack shared by both sites, and access to Prism Central for the Roubaix cluster is then available.

Go further

Disaster Recovery Plan on Nutanix

Asynchronous or NearSync replication through Prism Element

Advanced replication with Leap

Introduction to vRacks

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