What’s .NEXT 2016 – ESXi Management from PRISM

Posted on June 21, 2016 by Josh Odgers

Nutanix has always been designed to be hypervisor agnostic, and being the first and only HCI platform on the market to support VMware ESXi, Microsoft Hyper-V and KVM/AHV means we do not want to tie the management interface to any one platform.

In my opinion this is a huge advantage for many reasons including:

Being able to provide a consistent management interface across hypervisors
Not being dependant on 3rd party management components/interfaces
Building our platforms management layer (PRISM) in a fully distributed and highly available manner.

However while Nutanix AHV solution is entirely managed by PRISM, customers who run ESXi are still experiencing pain due to having to use the vSphere Web Client for some tasks.

This is why it was importaint for Nutanix to provide the ability to perform ESXi VM Operations from Prism (as shown below) while providing the ability to centrally manage all Nutanix clusters running ESXi or AHV to minimise the dependancy on the the vSphere Web Client.

At this stage the new ESXi management capabilities of PRISM does not remove the requirement for vCenter so this is still a single point of failure for vSphere customers.

Enhanced functionality to further reduce the dependancy on the vSphere Web Client are also expected in a future release, but for now, many of the day to day VM operations will make life easier for vSphere customers.

Related .NEXT 2016 Posts

Example Architectural Decision – Single Sign On Configuration for Single Site w/ Multiple vCenter Servers

Posted on June 24, 2013 by Josh Odgers

Problem Statement

What is the most suitable deployment mode for vCenter Single-Sign On (SSO) in an environment where there is a single physical datacenter with multiple vCenter servers?

Requirements

1. The solution must be a fully supported configuration
2. Meet/Exceed RTO of 4 hours
3. Support Single Pane of glass management
4. Ability to scale for future vCenters and/or datacenters

Assumptions

1. All vCenter instances can access the same Authentication source (Active Directory or OpenLDAP)

2. The average number of authentications per second for each SSO instance is <30 (Configuration Maximum)

Constraints

1. vCenter servers reside in different network security zones within the datacenter

Motivation

1. Future proof the environment

Architectural Decision

1. Use “Multi-site” SSO deployment mode

2. Use one SSO instance per vCenter

3. Each SSO instance will reside with the vCenter on a Windows 2008 x64 R2 virtual machine in a vSphere cluster with HA enabled

4. Each SSO instance will use the bundled SQL database

5. (Optional) For greater availability, vCenter Heartbeat can be used to protect each SSO instance along with vCenter and the bundled SSO database

6. The Virtual Machine hosting vCenter/SSO will be 2vCPU and 10GB RAM to support vCenter/SSO/Inventory Service and an additional 2GB RAM to support the bundled SSO Database

7. Using the bundled SSO database ensures only a single vCenter Heartbeat deployment is required to protect each vCenter/SSO instance and reduce Windows licensing

Justification

1. To simplify the maintenance/upgrade process for vCenter/SSO as different versions of vCenter cannot co-exist with the same SSO instance

2. If “High Availability” mode is used it would prevent single pane of glass management

3. “High Availability” mode currently requires an SSL load balancer to be configured as well as manual intervention which can be complicated and problematic to implement and support

4. “Basic” mode prevents the use of Linked Mode which will prevent the management of the environment being single pane of glass

5. Where vCenter servers reside in different network security zones, Using Multi-site mode allows each SSO instance to use authentication sources that are as logically close as possible while supporting single pane of glass management. This should provide faster access to authentication services as each SSO instance is configured with Active Directory servers located in the same or logically closest network security zone/s.

6. If one instance SSO goes offline for any reason, it will only impact a single vCenter server. It will not prevent authentication to the other vCenter servers.

7. Reduce the licensing costs for Microsoft Windows 2008 by combining SSO and vCenter roles onto a single OS

Alternatives

1. Use “Basic” Mode, resulting in a standalone version of SSO for each vCenter server with no single pane of glass management

2. Use “High Availability” mode per vCenter

3. Use a shared “High Availability” mode for all vCenters in the datacenter

4. In any SSO configuration, Host the SSO database (per vCenter) on a Oracle OR SQL Server

5. Run SSO on a dedicated Windows 2008 instance with or without the SSO database locally

6. Run a single SSO instance in “Multi-Site” mode , use vCenter Heartbeat to protect SSO (including the database) and share the SSO instance with all vCenters

Implications

1. Where SSO is not protected by vCenter Heartbeat (optional), SSO for each vCenter is a Single point of failure where authentication to the affected vCenter will fail

2. “Multi-Site” mode requires the install-able version of SSO, which is Windows Only which prevents the use of the vCenter Server Appliance (VCSA) as it only supports basic mode.

Related Articles

1. vSphere 5.1 Single Sign On (SSO) deployment mode across Active/Active Datacenters

2. vSphere 5.1 Single Sign On (SSO) Architectural Decision Flowchart

3. Disabling Single Sign On – Dont Do It! – Michael Webster (VCDX#66) @vcdxnz001

vSphere 5.1 Single Sign On (SSO) Configuration – Architectural Decision flowchart

Posted on June 22, 2013 by Josh Odgers

The below is the second architectural decision flowchart in my new series and covers a new feature in vSphere 5.1, Single Sign On.

There has been a lot of discussion around “Best Practices” for SSO, I have taken the approach of creating this flowchart with as many scenarios as possible.

I would recommend that you validate any configuration the flowchart results in is suitable for your environment prior to implementing into production.

The flowchart is designed to be used as a guide only, not a definitive decision making resource.

This also compliments some of my previous example architectural decisions which are shown in the related topics section below.

A special thanks to Michael Webster (VCDX#66) @vcdxnz001 & James Wirth (VCDX#83)@JimmyWally81 for their review and contributions to this flowchart.