In my VMware 5.1 update 2 host cluster (3 hosts), I have a mix of production and dev/test VMs. On the storage side I have multiple datastore clusters. There are 2 for production on Nimble storage (we're migrating to a new SAN) and 1 for Dev/Test on an EMC VNx 3100.
My boss wants me to move all dev/test machines off the 3 production hosts to free up resources in prod. A new host has been built and added to the same datacenter, but not a member of the cluster. My plan was to 1)add the dev datastore cluster to the new host 2)vmotion the VMs to it 3)remove access to dev datastore cluster for production host cluster.
I had to call EMC because I was unable to add the Dev datastores to the new host. I logged into EMC unisphere and surprisingly I had to not only discover and add the host to unisphere, but I also had to grant access to the new host for all the datastores, which wasn't working. After talking to EMC they fixed my ability to grant access, but they said that since all the hosts are not part of the host cluster that data corruption is likely and they don't recommend the above plan. My revised plan was 1)shut down all VMs residing on dev datastore cluster 2)Through EMC unisphere grant access to dev datastores to new host 3)move VMs to new host 4)remove access to dev datastores for host cluster 5)power on VMs. EMC was OK with this plan.
I reviewed the updated plan with my boss and it turns out it maybe problematic to shutdown all the VMs in Dev/Test, because some are kind of production. His question was could we add the new host to the host cluster and edit DRS settings so we could isolate Dev/Test on the new host, which I didn't know the answer to. My assumption is no as these setting would come from cluster object.
How would you tackle what i'm being asked to accomplish?
Do I simply have to tell him we need a maintenance window and shut these machines down or is adding the host to the cluster a valid suggestion?
This is the first time I've encounter a storage product that requires you to grant access to datastores for a host.
Thank you in advance