HP 6100, StorageWorks 8100, StorageWorks EVA Virtualization Adapter Administrator's Manual

HP StorageWorks

EVA Virtualization Adapter administrator guide

Part number: 5697-0177
Third edition: September 2009

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Contents

1 Overview of HP EVA Virtualization Adapter ........................................... 7

Discovery of disk arrays and LUNs ................................................................................................ 7

Disk array discovery sequence ............................................................................................... 8

LUN discovery sequence ....................................................................................................... 8

Failover testing ........................................................................................................................... 9

Failover recovery ........................................................................................................................ 9

Communication path ................................................................................................................. 10

Replication options ................................................................................................................... 11

Command View EVA Configuration Options .......................................................................... 11

2 Configuring SRM and the HP EVA disk array ....................................... 13

Setting up the HP EVA SAN environment ...................................................................................... 13

Adding an ESX server ......................................................................................................... 13

Installing licenses ............................................................................................................... 13

Creating vdisks for datastores .............................................................................................. 14

Presenting LUNs ................................................................................................................. 14

Creating and configuring datastores ..................................................................................... 14

Installing HP EVA Virtualization Adapter ...................................................................................... 14

Pairing SRM sites ...................................................................................................................... 15

Configuring SRM to communicate with HP Command View EVA ..................................................... 15

Create protection groups .......................................................................................................... 18

Create recovery plans ............................................................................................................... 19

3 Installing and removing HP EVA Virtualization Adapter ......................... 21

Installation directory .................................................................................................................. 21

Installation prerequisites ............................................................................................................. 21

Installing HP EVA Virtualization Adapter ...................................................................................... 21

Checking the installation ............................................................................................................ 23

Removing HP EVA Virtualization Adapter ..................................................................................... 24

4 Failover and failback with SRM .......................................................... 25

Failover ................................................................................................................................... 25

Failback .................................................................................................................................. 25

Failback scenario with SRM ................................................................................................. 25

Snapconfig utility ...................................................................................................................... 26

5 Troubleshooting HP EVA Virtualization Adapter .................................... 29

HP StorageWorks EVA disk arrays do not appear in Site Recovery Manager .................................... 29

HP StorageWorks EVA Virtualization Adapter does not install ......................................................... 29

Virtual machines do not start at recovery site after failover. ............................................................. 29

Site Recovery Manager timeout failure in large array configurations ................................................ 29

Virtual machines do not start at recovery site during the test failover test. .......................................... 30

Error messages ......................................................................................................................... 30

EVA Virtualization Adapter administrator guide 3

SRM log .................................................................................................................................. 30

EVA log ................................................................................................................................... 30

HP EVA Virtualizaton Error Messages .......................................................................................... 31

6 Reference ........................................................................................ 33

Intended audience .................................................................................................................... 33

Related documentation .............................................................................................................. 33

Document conventions and symbols ............................................................................................. 34

HP technical support ................................................................................................................. 34

Subscription service .................................................................................................................. 35

HP websites ............................................................................................................................. 35

Documentation feedback ........................................................................................................... 35

Glossary ............................................................................................ 37

Index ................................................................................................. 39

4

Figures

Discovered Information .............................................................................................. 81

Using snapshots for failover test ................................................................................. 92

HP EVA Virtualization Adapter architecture ................................................................. 103

Snapconfig.xml file ................................................................................................. 274

EVA Virtualization Adapter administrator guide 5

Tables

EVA Virtualization Adapter log messages ................................................................... 311

6

1 Overview of HP EVA Virtualization
Adapter

HP StorageWorks EVA Virtualization Adapter (HP EVA Virtualization Adapter) is installed on VMware
Site Recovery Manager (SRM) servers and enables communications between SRM and HP
StorageWorks Command View EVA (and HP StorageWorks Continuous Access EVA for remote
replication).

HP EVA Virtualization Adapter performs the following functions:

• Discovers disk arrays

• Discovers replicated LUNs

• Fails over storage for testing (test a recovery plan)

• Fails over storage for recovery (execute a recovery plan)

For detailed operational information on HP StorageWorks Command View EVA, HP StorageWorks
Continuous Access EVA, HP StorageWorks Business Copy EVA, or VMware Site Recovery Manager
see the sources cited in Related documentation.

Discovery of disk arrays and LUNs

During SRM configuration, HP EVA Virtualization Adapter is called to discover available arrays and
replicated LUNs.

The following information is discovered:

• Storage array IDs (WWN)

• Controller Port WWNs

• Physical host HBAs

• LUNs assigned to local (protected) physical and virtual hosts

• Remote recovery storage array ID

• Remote vdisk name

Remote vdisks are members of HP EVA data replication groups, and are replicated between protected
and recovery HP EVAs using HP Continuous Access EVA.

EVA Virtualization Adapter administrator guide 7

Figure 1 Discovered Information

.

Disk array discovery sequence

The array discovery sequence is:

1. SRM makes a request to HP EVA Virtualization Adapter for available arrays.

2. HP EVA Virtualization Adapter connects to HP Command View EVA servers and requests array

controller port information (WWN).

3. HP EVA Virtualization Adapter returns the results to SRM.

LUN discovery sequence

The LUN discovery sequence is:

1. SRM makes a request to HP EVA Virtualization Adapter for replicated LUNs on a local (protected)

array.

2. HP EVA Virtualization Adapter connects to HP Command View EVA servers and requests replicated

vdisks on the protected array.

3. HP Command View EVA looks for vdisks that are members of data replication groups.

4. For each replicated vdisk found on the protected array, HP EVA Virtualization Adapter gathers

the following information:

• Remote array ID

• Remote vdisk name

• Local presentation information

• Host the LUN is presented to

• ID assigned to host

5. HP EVA Virtualization Adapter returns this information to SRM.

6. SRM correlates LUNs with datastores.

Overview of HP EVA Virtualization Adapter8

Failover testing

HP EVA Virtualization Adapter provides information and performs EVA operations for nondisruptive
testing of SRM failover recovery plans. SRM uses the information gathered during the discovery process
to create snapshots of remote vdisks (see Figure 2). After testing verifies the vdisks snapshots can be
recovered after failure of the local array (via a recovery plan), SRM uses HP StorageWorks EVA
Virtualization Adapter to unpresent and delete the snapshots. HP Business Copy EVA is used to create
snapshots during recovery plan testing.

NOTE:

For Failover, the ESX LVM settings must be set to default for Snapshot (default is disallow) and
resignature (default is allow).

Figure 2 Using snapshots for failover test

.

Failover recovery

During recovery, SRM executes a recovery plan. When SRM reaches the Prepare Storage step in the
recovery plan, it provides the LUN information needed for failover to HP EVA Virtualization Adapter.
The information includes:

• Recovery site storage array ID

• Vdisk name

• Recovery ESX server HBA ports (WWNs) for post-failover LUN presentation

EVA Virtualization Adapter administrator guide 9

HP EVA Virtualization Adapter then communicates with HP Command View EVA and correlates the
requested vdisks with data replication groups. The adapter fails over each data replication group
associated with the LUN information provided by SRM. HP EVA Virtualization Adapter then obtains
LUN presentation information for each vdisk that has failed over and returns the information to SRM.
The information includes:

• vdisk name

• LUN number assignment to recovery HBA ports

NOTE:

During initial setup, replicated vdisks need to be presented to both the protected and recovery ESX
hosts.

NOTE:

For failover testing, LUN number assignment is the LUN number used by the
parent vdisk.

Communication path

snapshot

and not the

HP EVA Virtualization Adapter provides communications between HP StorageWorks Command View
EVA and SRM. A detailed view of the architecture is shown in Figure 3.

HP EVA Virtualization Adapter processes SRM requests through HP Command View EVA. Once the
information is received by HP EVA Virtualization Adapter, it is passed on to SRM.

Figure 3 HP EVA Virtualization Adapter architecture

.

Overview of HP EVA Virtualization Adapter10

Replication options

SRM with HP EVA Virtualization Adapter supports HP Continuous Access EVA synchronous and
asynchronous replication operations.

Command View EVA Configuration Options

There are two configuration options for the disaster recovery environment with SRM and HP EVA
Virtualization Adapter:

• Single active Command View EVA server In this configuration, the Command View EVA manage-

ment server manages the protected and recovery arrays actively. A second Command View EVA
management server manages the protected and recovery arrays passively.

NOTE:

In this configuration (during failover or test failover) if the primary Command View EVA site is
down, the recovery Command View EVA site will be forced to actively manage the recovery array.

• Split active Command View EVA server In this configuration, each Command View EVA manage-

ment server actively manages a single array (the local array). Each Command View EVA manage­ment server manages the remote array passively.

EVA Virtualization Adapter administrator guide 11

Overview of HP EVA Virtualization Adapter12