#Vcenter 6.5 cluster different full
Reason for the question is to avoid hard splitting the available SAN space in two parts, one for each cluster, without being able to "rebalance" storage if one LUN/datastore gets full white the other still has available space.
#Vcenter 6.5 cluster different plus
My question is deliberately generic, but if you need a concrete example think about two Essential Plus clusters, three nodes in each cluster, all of them connected via iSCSI to the same LUNs. The individual VMs will be in only one cluster inventory, but on the same datastore there could be a mix of VMs from the two (or possibly more?) clusters. It is the norm to share the datastore between multiple hosts in the same cluster (and it is required for vSphere HA), but I'm talking about multiple, otherwise independent clusters each one with its own nodes and vCenter.īy "sharing" I mean having both clusters actively working on the datastore with virtual machines and possibly the datastore heartbeat for HA. The key message here is to be sure that you have thought well about the design decisions and that you preserve logics as much as possible to keep a clear view even when the the environment grows.Is it possible to share the same datastore between multiple VMware clusters of the same version (both 6.5 or both 6.7)? While preserving the one Datacenter design which, from a logic perspective they had. This design argument can easily be set aside since it’s possible to create Subfolders as well. Since the Datacenter object is the boundary for Folders their environment looked like this:
Moving a virtual machine connected to networkA from datacenterA to datacenterB results in the virtual machine changing the network it is connected to.īack to the the discussion about creating multiple Datacenters, this was mainly started because the organization wanted a static “Folder” hierarchy per environment. For example, a network named networkA in datacenterA might not be the same network as a network named networkA in datacenterB. VM restart priority, in conjunction with the previous. A per-VM EVC mode is set as an attribute of the virtual machine settings and adds more flexibility for managing VMs that must migrate with vMotion. configure, manage, and orchestrate various VMware vSphere 6.5 components.
Because of this, moving objects between datacenters can create unpredictable results. VMware vSphere 6.7 provides the ability to set a per-VM EVC mode that can be useful for VMs migration across different clusters or vCenter Servers and offers you more granularity. Objects with the same name in two different datacenters are not necessarily the same object. Virtual machines, templates, and clusters need not be unique within the datacenter, but must be unique within their folder. For example, you cannot have two datastores with the same name within a single datacenter, but you can have two datastores with the same name in two different datacenters. Exploring vSphere 6.5 API-Part 1: Datacenter & Cluster Manish Jha I am using API for quite a bit now in our prod environment which is based on vCloud Director and many times API’s had proved a handy way to troubleshoot issues where GUI was not providing a way to proceed. Ideally, every HA node should reside on a different host and.
The names for these objects must be unique within a datacenter. HA cluster nodes are only supported on ESXi 5.5 and/or vCenter Server 5.5 or later. The datacenter defines the namespace for networks and datastores. Unlike a folder, which is used to organize a specific object type, a datacenter is an aggregation of all the different types of objects needed to do work in virtual infrastructure: VMware Features like EVC, DRS, DPM and HA are enabled on a per Cluster basis. The cluster manages the resources of all hosts. When you add a host to a cluster, the host’s resources become part of the cluster’s resources. Recently I got involved in a discussion about “Creating multiple Datacenters with one Clusters rather than one Datacenter with multiple Clusters”įirst of all lets get the definitions of these objects summarized (as stated in the vSphere Datacenter Administration Guide)Ī collection of ESX/ESXi hosts and associated virtual machines intended to work together as a unit.
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