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in blueprint - 25 May, 2016
by mordi - one comment
VCAP-DCV Deploy Objective 2.1 – part 5

In this post we will continue to discuss Implementing Complex Storage Solutions

Here are the objectives from the blueprint that i am going to cover:

  • Configure Storage Multi-pathing according to a deployment plan
  • Deploy virtual volumes

Lab Setup:

Using VMware workstation:

  • Microsoft Servers 2012R2 for Services (DNS , DHCP, etc…)
  • installed esx0
  • Installed VCSA
  • EMC Unity-VSA  appliance (see my previous post: Installing Unity VSA for my lab to support vvol)

 Documents used:

  • vSphere6 Storage Guide

Configure Storage Multi-pathing according to a deployment plan:

As you remember from the VCP study VMware has three PSP :

  • MRU – Most recently used , When the path becomes unavailable, the host selects an alternative path. The host does not revert back to the original path when that path becomes available again. Default for ACTIVE-PASSIVE storage device.
  • Fixed – The host uses the designated preferred path, if it has been configured.Otherwise, it selects the first working path discovered at system boot time.Default for ACTIVE-ACTIVE  storage device.
  • Round Robin (RR) – The host uses an automatic path selection algorithm rotating through all active paths
    available paths when connecting to active-active arrays. RR is the only load balancing policy. 

To assign a policy via the GUI: Under Storage >> Select datastore>>Setting >>Connectivity and multipathing >> host >> edit multipathing

mpio2

SATP is Storage Array Type Plug-In, which handles path failover for a given storage array.We can see the SATP policies via the CLI by running the following command:  esxcli storage nmp satp list

 

mpio1

 

Claim rules:

When you start your ESXi host or rescan your storage adapter, the host discovers all physical paths to storage devices available to the host. Based on a set of claim rules, the host determines which multipathing plug-in (MPP) should claim the paths to a particular device and become responsible for managing the multipathing support for the device.

AS you can see in the pic below the default PSP for VMW_SATP_DEFAULT_AA is Fixed , to change it to MRU we ran the command :  esxcli storage nmp satp set -s VMW_SATP_DEFAULT_AA -P VMW_PSP_MRU . We listed it again to confirm the change.

mpio3

Deploy virtual volumes:

For this objective i needed to find a storage appliance that can support vVOL in my home lab. I did find the EMC UnityVSA and in my previous post (Installing Unity VSA for my lab to support vvol) i discussed how to install it.

 

Preparing EMC UnityVSA to create vVOL’s:

Configure vcenter to use EMC UnityVSA as services provider (in the URL add the IP:8443/vasa/version.xml)

vvol1

Open EMC unisphere and click on VMware >> Datastores >>Add >>VVOL(Block)

vvol2

 

Provide a name for the container (EMC calls it datastore)

emc3

Choose the profile.

vvol4

Configure the host

vvol5

Choose the host

vvol6

Click finish

vvol7

Follow the wizard:

vvol8

vvol9

vvol10

In vSphere configure your iSCSi initiator to use EMC UnityVSA

vvolISCSI

Now lets create a new vVOL datastore

vvol12

Create a name and choose emc_vvol and continue with the wizard.

vvol13

Now that we have a vVOL datatore , we can create new storage profile based on EMC unityVSA

vvol16

and you can also create new VM to run on the vVOL datatstore

vvol17

New VM unisphere view:

vvol18

 

Thanks for reading

Mordi.

 

Leave a Reply

  • Dennis //23 Jun 2016

    Great post. Thank you for your effort for putting this all on the web.