Migrating Vmware datacenter to another network
I am in the process of migrating my entire network from class C /24 to a Class B /16 totally changing IPs.
In my vmware infracture I have a VNX3150 Datastorage in one cluster, one vcenter server with 3 host and about 10 bussiness critical VMsThe migration of the VNX seems very straight forward once I have a new vcenter. I use ISCI which is in a separate network that I am not planning to touch at all.
I thought the migrating the ESXI was a straight fooorward task as well. Removing Hosts from Vcenter changing Ip of the hosts and subnetmask rebooting creating a new vcenter (which I can afford since is very small datacenter) with new Ip addressing and Voila rejoing host to Vcenter and life is good!!!
After a conversation with Vmware they seems to believe I need to rebuilt my entire datacenter from scratch, rebuilding ESXI from scratch and rejoining storage and recreating networking switches and connections. The question is is it true? do I have to go to the painful task of starting from 0?
I alrady have enough moving DControllers, PC and all kind of equipment..HELP!!
In my vmware infracture I have a VNX3150 Datastorage in one cluster, one vcenter server with 3 host and about 10 bussiness critical VMsThe migration of the VNX seems very straight forward once I have a new vcenter. I use ISCI which is in a separate network that I am not planning to touch at all.
I thought the migrating the ESXI was a straight fooorward task as well. Removing Hosts from Vcenter changing Ip of the hosts and subnetmask rebooting creating a new vcenter (which I can afford since is very small datacenter) with new Ip addressing and Voila rejoing host to Vcenter and life is good!!!
After a conversation with Vmware they seems to believe I need to rebuilt my entire datacenter from scratch, rebuilding ESXI from scratch and rejoining storage and recreating networking switches and connections. The question is is it true? do I have to go to the painful task of starting from 0?
I alrady have enough moving DControllers, PC and all kind of equipment..HELP!!
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Download a trial of Veeam Backup and Replication if you have the time. Use it to Backup VMs.
If your DNS is in good order vCenter IP Address change is good.
Also make sure you update DNS records for ESXi hosts.
OVF is one method of backup and restore.
If your DNS is in good order vCenter IP Address change is good.
Also make sure you update DNS records for ESXi hosts.
OVF is one method of backup and restore.
I would recommend the following:
1. Shutdown all VMs
2. Enable SSH to all ESx host servers
3. Remove all ESxi servers from Inventory
4. Change IP addresses on all servers (vCenter and ESXi either via SSH or the console)
5. Start vCenter and validate the management IP is correct
6. Add all ESXi servers back to the inventory
You may also have to remove and re-add your storage if you are using NFS share or iSCSI.
1. Shutdown all VMs
2. Enable SSH to all ESx host servers
3. Remove all ESxi servers from Inventory
4. Change IP addresses on all servers (vCenter and ESXi either via SSH or the console)
5. Start vCenter and validate the management IP is correct
6. Add all ESXi servers back to the inventory
You may also have to remove and re-add your storage if you are using NFS share or iSCSI.
IP address change is not supported via console. Eg via SSH login only DCUI
VMs do not need to be shutdown.
SSH enable not required.
Storage is not affected if iSCSI network or VMKernels not touched.
VMs do not need to be shutdown.
SSH enable not required.
Storage is not affected if iSCSI network or VMKernels not touched.
ASKER
Thanks this solution work for me, so far new vcenter up and running!
ASKER
That is what i thought even if i am changing subnets i do not see the need of rebuilding, i think i am going to try it that way: removing from vcenter make the changes in the DCUI and rejoin as you mention. Do you think i need to recreate the vcenter server or just change ips before rejoining?
To be safe what is the best way to backup my VMs copying the folders where the Vms live on, creating OVF or you have a suggestion.
Thanks a lot again!!!!!