When creating a workload domain (WLD), a number of hosts are commissioned and then added to the WLD during the deployment. For details on how to commission a host, part 5 of my VCF blog series explains the steps. The actual creation of the WLD is covered in part 6. Since I have already covered these steps in detail, I won’t repeat the whole sequence here, but rather cover the steps that are different when VMFS formatted LUNs presented over fibre channel is the preferred storage for a WLD.
Step 1. Format a shared LUN with VMFS
In my example, I am going to add 3 newly commissioned hosts to my new WLD. These hosts have access to a shared LUN from an external fibre channel storage array. This LUN needs to be formatted with VMFS before it can be used as storage in the WLD. This is very simple to do – simply log onto to one of the ESXi hosts and format the LUN with VMFS from there. Since this LUN (now datastore) is shared on all hosts, a simple rescan will show the LUN as a formatted VMFS volume on each of the commissioned hosts, as shown below.
Step 2. Commission hosts with VMFS on FC
We now commission the hosts. This time, as the hosts are added for validation, we specify that the storage type as VMFS on FC. In the previous host commission in part 5, we specified vSAN. Note that a big difference is that we did not have to format the vSAN datastore in that earlier example – it is taken care of automatically. However for VMFS on SC, we do need to format the datastore manually before it can be consumed.
Complete the commissioning. Assuming the validation succeed, we can now proceed to building the new WLD. If there are issue with the validation, look back on part 5 to see how you can troubleshoot and resolve potential validation issues.
Step 3. Create a new VI Workload Domain
Many of the steps involved in creating a new VI WLD will be identical to the last time we created a workload domain, detailed in part 6. However on that occasion, when asked to make a Storage Selection for the WLD, we chose vSAN as the storage type. This time, we are going to choose VMFS on FC (fibre channel) as shown in the Storage Selection window below..
Now we move onto the creation of the VI workload domain in earnest. Everything is much the same as what we saw in part 6. When we get to the Storage section, we must now provide the name of the VMFS datastore that we manually formatted earlier. In this case I have imaginatively called it vmfs-datastore.
And that is basically it. Complete the VI configuration, review and finish. All going well, your new WLD should now be active, and your new VMFS on FC Storage details should be visible.
So while vSAN is a still a requirement for the VMware Cloud Foundation management domain, vSAN, VMFS and NFS are available as external storage for the workload domains.