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New virtual data centre design considerations

split virtualization design based on environment or server role?Design of a hosting networkWhat Data Center room routine maintenance tasks should be done?Servers vs. Worker ProcessesWhen to employ server failover in a virtual environmentWhere to install ESXi so that all local drives are available to VSANMigrating to a Data CentreCreate vswitches pn ESXI for PFsenseNAT Port Forward to VCSA Web Client not workingMigrate Windows Server 2012 R2 Data Center to a physical Windows Server 2016

0

The situation is like this.

The customer has 2 physical servers running 1 ESXi each, running virtual DHCP and DNS windows server on both ESXi as redundancy,he wants to add a 3rd server, and have vCSA with vSAN configured.

I have thought of 3 ways to go about it.

1. To implement it such that vCSA is installed at the DC (NOT as a separate physical server), ESXi installed on 3 physical servers
   on-site, with vSAN. Here my question is where will the witness be ?




2. Physical server as vCSA running on ESXi, same server to run as witness, and the remaining 2 servers with 1 ESXi each, is this a good
   approach. The vCSA server will be in the data center connected over
   WAN.




3. Another way is to have 4 physical servers, 2 servers with ESXi, and the 4th server with ESXi running vCSA and is used for vSAN
   configuration, 1 server as witness, all on-site.

Thank You

Network design PDF file

Any thoughts.

Thank You

virtualization datacenter

share|improve this question

edited 11 hours ago

Huud Rych

asked 13 hours ago

Huud RychHuud Rych

32

add a comment | 

0

The situation is like this.

The customer has 2 physical servers running 1 ESXi each, running virtual DHCP and DNS windows server on both ESXi as redundancy,he wants to add a 3rd server, and have vCSA with vSAN configured.

I have thought of 3 ways to go about it.

1. To implement it such that vCSA is installed at the DC (NOT as a separate physical server), ESXi installed on 3 physical servers
   on-site, with vSAN. Here my question is where will the witness be ?




2. Physical server as vCSA running on ESXi, same server to run as witness, and the remaining 2 servers with 1 ESXi each, is this a good
   approach. The vCSA server will be in the data center connected over
   WAN.




3. Another way is to have 4 physical servers, 2 servers with ESXi, and the 4th server with ESXi running vCSA and is used for vSAN
   configuration, 1 server as witness, all on-site.

Thank You

Network design PDF file

Any thoughts.

Thank You

virtualization datacenter

share|improve this question

edited 11 hours ago

Huud Rych

asked 13 hours ago

Huud RychHuud Rych

32

add a comment | 

The situation is like this.

The customer has 2 physical servers running 1 ESXi each, running virtual DHCP and DNS windows server on both ESXi as redundancy,he wants to add a 3rd server, and have vCSA with vSAN configured.

I have thought of 3 ways to go about it.

1. To implement it such that vCSA is installed at the DC (NOT as a separate physical server), ESXi installed on 3 physical servers
   on-site, with vSAN. Here my question is where will the witness be ?




2. Physical server as vCSA running on ESXi, same server to run as witness, and the remaining 2 servers with 1 ESXi each, is this a good
   approach. The vCSA server will be in the data center connected over
   WAN.




3. Another way is to have 4 physical servers, 2 servers with ESXi, and the 4th server with ESXi running vCSA and is used for vSAN
   configuration, 1 server as witness, all on-site.

Thank You

Network design PDF file

Any thoughts.

Thank You

virtualization datacenter

share|improve this question

edited 11 hours ago

Huud Rych

asked 13 hours ago

Huud RychHuud Rych

32

share|improve this question

edited 11 hours ago

Huud Rych

asked 13 hours ago

Huud RychHuud Rych

32

share|improve this question

edited 11 hours ago

Huud Rych

asked 13 hours ago

Huud RychHuud Rych

32

asked 13 hours ago

Huud RychHuud Rych

32

asked 13 hours ago

Huud RychHuud Rych

32

1 Answer
1

active

oldest

votes

1

Old article, but something to think about when implementing vSAN: http://www.yellow-bricks.com/2013/10/24/4-minimum-number-hosts-vsan-ask/

With three hosts you should theoretically be fine unless something happens to one of the remaining hosts while you’ve got one machine down for maintenance. This issue can be mitigated by not only evacuating VMs but also evacuating all their data when putting a host in maintenance mode. Note that this extends the time required for entering maintenance mode considerably.

To be honest I would probably just run VCSA inside such a virtual environment, but I would make sure to have some kind of non-vSAN storage available - perhaps something as simple as an NFS NAS - as an added security to simplify recovery in case of disaster.

share|improve this answer

edited 9 hours ago

answered 10 hours ago

Mikael HMikael H

53618

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, I believe the link is for a 3 node setup wherein there are 2 ESXi hosts and 1 Witness, I have 3 ESXi hosts plus 1 Witness, unsure it would be the same interms of implementation..
  
  – Huud Rych
  9 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  With three hosts you don't need a separate witness, with the caveat I mentioned in my post: vSAN will create data redundancy across all hosts in such a way that you (temporarily) will survive a host or disk failure. Four hosts is the smallest size vSAN that will automatically self-heal after a failure, but three hosts is the minimum to run without a separate witness. In fact I'm unsure if you can even set up a three-host vSAN with a separate witness appliance.
  
  – Mikael H
  9 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, understood..
  
  – Huud Rych
  9 hours ago
  

  
  
  
  

add a comment | 

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1

Old article, but something to think about when implementing vSAN: http://www.yellow-bricks.com/2013/10/24/4-minimum-number-hosts-vsan-ask/

With three hosts you should theoretically be fine unless something happens to one of the remaining hosts while you’ve got one machine down for maintenance. This issue can be mitigated by not only evacuating VMs but also evacuating all their data when putting a host in maintenance mode. Note that this extends the time required for entering maintenance mode considerably.

To be honest I would probably just run VCSA inside such a virtual environment, but I would make sure to have some kind of non-vSAN storage available - perhaps something as simple as an NFS NAS - as an added security to simplify recovery in case of disaster.

share|improve this answer

edited 9 hours ago

answered 10 hours ago

Mikael HMikael H

53618

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, I believe the link is for a 3 node setup wherein there are 2 ESXi hosts and 1 Witness, I have 3 ESXi hosts plus 1 Witness, unsure it would be the same interms of implementation..
  
  – Huud Rych
  9 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  With three hosts you don't need a separate witness, with the caveat I mentioned in my post: vSAN will create data redundancy across all hosts in such a way that you (temporarily) will survive a host or disk failure. Four hosts is the smallest size vSAN that will automatically self-heal after a failure, but three hosts is the minimum to run without a separate witness. In fact I'm unsure if you can even set up a three-host vSAN with a separate witness appliance.
  
  – Mikael H
  9 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, understood..
  
  – Huud Rych
  9 hours ago
  

  
  
  
  

add a comment | 

1

Old article, but something to think about when implementing vSAN: http://www.yellow-bricks.com/2013/10/24/4-minimum-number-hosts-vsan-ask/

With three hosts you should theoretically be fine unless something happens to one of the remaining hosts while you’ve got one machine down for maintenance. This issue can be mitigated by not only evacuating VMs but also evacuating all their data when putting a host in maintenance mode. Note that this extends the time required for entering maintenance mode considerably.

To be honest I would probably just run VCSA inside such a virtual environment, but I would make sure to have some kind of non-vSAN storage available - perhaps something as simple as an NFS NAS - as an added security to simplify recovery in case of disaster.

share|improve this answer

edited 9 hours ago

answered 10 hours ago

Mikael HMikael H

53618

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, I believe the link is for a 3 node setup wherein there are 2 ESXi hosts and 1 Witness, I have 3 ESXi hosts plus 1 Witness, unsure it would be the same interms of implementation..
  
  – Huud Rych
  9 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  With three hosts you don't need a separate witness, with the caveat I mentioned in my post: vSAN will create data redundancy across all hosts in such a way that you (temporarily) will survive a host or disk failure. Four hosts is the smallest size vSAN that will automatically self-heal after a failure, but three hosts is the minimum to run without a separate witness. In fact I'm unsure if you can even set up a three-host vSAN with a separate witness appliance.
  
  – Mikael H
  9 hours ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, understood..
  
  – Huud Rych
  9 hours ago
  

  
  
  
  

add a comment | 

Old article, but something to think about when implementing vSAN: http://www.yellow-bricks.com/2013/10/24/4-minimum-number-hosts-vsan-ask/

With three hosts you should theoretically be fine unless something happens to one of the remaining hosts while you’ve got one machine down for maintenance. This issue can be mitigated by not only evacuating VMs but also evacuating all their data when putting a host in maintenance mode. Note that this extends the time required for entering maintenance mode considerably.

To be honest I would probably just run VCSA inside such a virtual environment, but I would make sure to have some kind of non-vSAN storage available - perhaps something as simple as an NFS NAS - as an added security to simplify recovery in case of disaster.

share|improve this answer

edited 9 hours ago

answered 10 hours ago

Mikael HMikael H

53618

share|improve this answer

edited 9 hours ago

answered 10 hours ago

Mikael HMikael H

53618

answered 10 hours ago

Mikael HMikael H

53618

answered 10 hours ago

Mikael HMikael H

53618