Hello,
Can you confirm that a SAN (with SSD) is mandatory to enable the HA ?
Can you confirme that 3 same hardware ESXi servers are mandatory to enable a vSAN (local datastores, not SAN) ?
For exemple :
3 DELL servers :
2 R740 + 1 R710 : vSAN is not possible
3 R740 : vSAN is not possible
Regards,
Can you confirm that a SAN (with SSD) is mandatory to enable the HA ?
This is not true. Some shared storage is necessary. It does not need to be a storage array, and the disk media does not need to be solid state.
Can you confirme that 3 same hardware ESXi servers are mandatory to enable a vSAN (local datastores, not SAN) ?
This is also not true. While even a single host can technically enable a vSAN datastore, two is the supported minimum.
Can you confirm that a SAN (with SSD) is mandatory to enable the HA ?
Prerequisites for vSphere HA:
So SSD on a SAN array is not mandatory.
Please note that vSAN and SAN are different things.
For vSAN you will need SSD's for cache tier.
Can you confirme that 3 same hardware ESXi servers are mandatory to enable a vSAN (local datastores, not SAN) ?
There is a 2 hosts configuration that is supported but you will need a withness.
So, yes you will need 3 hosts, also please make sure hosts are compliant with VMWare HCL (VMware Compatibility Guide - vsan ) or are vSAN ready nodes.
Once again, for vSAN (which is not the same as SAN) you will need SSD's
To resume : on hardware point of view :
HA =
+ 2 physical server ESXi
+ Shared Storage (SAN or NAS or Array Disks ? )
+ 2 Switchs : Redundant Networks
+ no SSD mandatory.
+ 2 licences vSphere
+ 1 licence vCenter (could be a VM ?)
vSAN =
+ 2 physical server ESXi
+ 1 physical server as Witness (exactly same hardware with the 2 ESX ?)
+ 1 (or more : RAID1 + spare) SSD per physical server (3 x (2+1) = 9 SSD)
+ 3 licences vSphere
+ 1 licence vCenter (could be a VM ?)
Can you confirm ?
Regards
HA =
+ 2 physical server ESXi
+ Shared Storage (SAN or NAS or Array Disks ? )
+ 2 Switchs : Redundant Networks
+ no SSD mandatory.
+ 2 licences vSphere
+ 1 licence vCenter (could be a VM ?), yes check VCSA vCenter Server Appliance Overview
This is correct
vSAN =
+ 2 physical server ESXi
+ 1 physical server as Witness (exactly same hardware with the 2 ESX ?)
For an easier config I would say 3 hosts and no witnesses
+ 1 (or more : RAID1 + spare) SSD per physical server (3 x (2+1) = 9 SSD) No
You need AT least 1 SSD for cache and 1 other disk for capacity per diskgroup or all SSD disks
there is no raid configured at the host level.
+ 3 licences vSphere
+ vSAN license
+ 1 licence vCenter (could be a VM ?)
HA:
Redundant pSwitch are not mandatory.... but for sure highly suggested
Hosts should have 2 or more ethernet ports.... with only one you need to suppress some warnings
You need Essentials Plus licensing or better
Regards,
Joerg