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VMware vSphere 6.5 – Native vCenter High Availability (VCSA 6.5 only)

By Vladan SEGET | Last Updated: December 19, 2016

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VMware announced vSphere 6.5. We have the details on the VCSA 6.5, the new installation options, and migration covered in a separate post. This post will focus on the newly introduced Native vCenter High Availability (HA). Note that this will only be available for the VCSA 6.5. Windows based vCenter server deployments won’t have this feature.

Since vSphere 6.0, VMware pushes the VCSA appliance further forward. In the past, the appliance has had limited scalability, limited support, or limited features. Not all architectural options were supported, so as a result, users were forced to used Windows based vCenters in order to be able to have features which they needed for their enterprise environments. The 6.5 release changes everything.

Not only that the features/functions parity is now equal with Windows based vCenter, but we have new features appearing in the VCSA based vCenter, which will not benefit the Windows-based deployments. We have now the VUM built-in, but also, the VCSA 6.5 supports Native vCenter High Availability.

VMware vSphere 6.5 also brings Virtual Hardware 13 allowing you to create and run VMs with up to 6TB of memory, UEFI secure boot for guest OS.

Let’s get back to Native vCenter High Availability (HA). As you know, previously there has been several options whether you wanted to assure an HA for your vCenter Server. Some of them were not easy to implement, like MSCS. To do a quick recap on those solutions, they were basically four of them:

  • vSphere High Availability (HA) – vCenter server VM gets restarted on another host within your cluster. Traditional.
  • vSphere Fault Tolerance (FT) – only in 6.0 (4.x, 5.0, 5.1 or 5.5 were not supported)
  • Microsoft clustering – WSFC/MSCS – Windows Server Failover Clustering or Microsoft Server Failover Clustering to protect a Windows-based vCenter Server. There was a support for using Microsoft SQL Cluster Service for use as a back-end database.
  • vCenter server Heartbeat – separate solution from VMware. A Paid product. This solution wasn’t a real commercial success. VMware has announced end of Availability for all vCenter Server Heartbeat versions.

Native vCenter High Availability (HA) – for VCSA only!!

This year, with vSphere 6.5, VMware introduces new, simplified Native vCenter server High Availability (HA) for VCSA 6.5. As being said, only vCenter server appliance (VCSA) based architectures will be supported.

What’s in and how it works?

  • Active-Passive deployments with Witness – synchronous DB replication, and file-based replication.
  • Requirements – there will be a new, second vNIC added (eth1) during the configuration (wizard based). A private network as an only requirement to have a subnet of the primary network.

You can see the schema below….

*********************************************************************

Shop for vSphere licenses at VMware Store:

  • vSphere Essentials Plus – vMotion, HA… 3 Hosts, vCenter
  • vSphere Essentials – 3 Hosts, vCenter
  • vSphere Standard – Per Physical CPU license

*********************************************************************

VMware vSphere 6.5 - Native VCSA 6.5 HA

There is no need for L2 network requirements or VXLAN.

For which scenarios?

You can have one VCSA in one datacenter (active) and passive VCSA in another datacenter. The VCSA vPostgress DB will have synchronous replication. VMware uses native vPostgres replication mechanism.

There are some latency requirements. (will be added here later).

File-based replication is near real-time based replication for some files that lays outside of VCSA. (Witness).

Two ways to enable VCSA HA:

There is two configuration options, two workflows, within the assistant:

  • Basic – minimum info is required through a wizard, like IP information, if you have DRS/storage DRS and then the system will create for you active and passive nodes for you, and create affinity and anti-affinity rules. The system will create the eth1 vNIC interfaces. Only one thing you’ll have to prepare – HA network.
  • Advanced – a bit more complex. You have to manually clone the VMs (active, passive and witness), provide IP information. But the advanced workflow allows you to place the VM for example, into another data center, or another site, with different SSO domain.

You can check all posts about vSphere 6.5 on our vSphere 6.5 dedicated WordPress page.

ESXi:

  • ESXi Commands List – networking commands [Part 2]  – useful to check BEFORE upgrade of ESXi !!! (HCL, Drivers, Firmware…)
  • How to Upgrade ESXi 6.0 to 6.5 via CLI [On Line]
  • How to Upgrade ESXi 6.0 to 6.5 via ISO
  • How to upgrade ESXi 6.0 to ESXi 6.5 via Offline Bundle
  • How to upgrade an ESXi 6.0 to ESXi 6.5 via VMware Update Manager
  • How to create a USB media with ESXi 6.5 Installation

vCenter Server:

  • How to deploy VMware VCSA 6.5 (VMware vCenter Server Appliance)
  • How to Migrate Windows based vCenter Server 6.0 to vCenter 6.5 (“In-Place”)
  • How to Migrate Windows Based vCenter to VCSA 6.5 [Lab] – Windows to Linux
  • VMware VCSA 6.5 Backup and Restore How-To
  • VMware VCSA 6.5 Active-Passive Setup With Simple Configuration – [LAB]
  • VMware VCSA 6.5 Active-Passive Setup With Advanced Configuration

Stay tuned through RSS, and social media channels (Twitter, FB, YouTube)

VMware vSphere 6.5:

  • VMware vSphere 6.5 Announced !!
  • VMware vSphere 6.5 – Native vCenter High Availability (VCSA 6.5 only)
  • VMware VCSA 6.5 Active-Passive Setup – Advanced Configuration
  • VMware vSphere 6.5 – HTML5 Web Client and More
  • VMware vSphere 6.5 – VUM, AutoDeploy and Host Profiles
  • VMware vSphere 6.5 – HA and DRS Improvements
  • VMware vSphere 6.5 Fault Tolerance (FT) Improvements
  • VMware VSAN 6.5 – What’s New?
  • VMware vSphere 6.5 – VM Encryption Details
  • VMware vSphere 6.5 Released – Start Your Download Engines
  • How to Migrate Windows Based vCenter to VCSA 6.5 [Lab]

Check our VMware vSphere 6.5 Page for ALL details about vSphere 6.5.

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| Filed Under: Server Virtualization Tagged With: Native vCenter High Availability, VMware vSphere 6.5 3 Comments

About Vladan SEGET

This website is maintained by Vladan SEGET. Vladan is as an Independent consultant, professional blogger, vExpert x11, Veeam Vanguard x5, VCAP-DCA/DCD, VCP, ESX Virtualization site has started as a simple bookmarking site, but quickly found a large following of readers and subscribers.

Connect on: Facebook. Feel free to network via Twitter @vladan.

Comments

  1. Almero says

    February 10, 2017 at 1:23 pm

    Hello , I assume if you have an existing EMC FPLEX GEO Metro Cluster , you should not implement VCSA Advanced Multi Site mode ? You need a static old school local HA and DRS cluster to host your VCSA 6.5 in to avoid multiple failover mechanisms .

    Reply
    • Vladan SEGET says

      February 10, 2017 at 3:55 pm

      That’s an interesting question. VMware folks, any insights on this?

      Reply
  2. Reza says

    June 27, 2017 at 8:59 am

    If you use the embedded PSC is that replicated as well?
    Thanks,

    Reply

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