Dell Storage, PowerStore, PowerFlex PowerMax & PowerScale, Virtualization & Containers Technologies
in the first part of the series, we provided an high-level overview of the PowerFlex 3.6 release. you can read all about it here. now, let’s dive deeper into the […]
in the first part of the series, we provided an high-level overview of the PowerFlex 3.6 release. you can read all about it here.
now, let’s dive deeper into the integration of PowerFlex with VMware SRM (Site Recovery Manager).
VMware Site Recovery Manager is a business continuity and disaster recovery solution that helps you plan, test, and run the recovery of virtual machines between a protected vCenter Server site and a recovery vCenter Server site.
You can use Site Recovery Manager to implement different types of recovery from the protected site to the recovery site.
Planned migration is the orderly migration of virtual machines from the protected site to the recovery site. Planned migration prevents data loss when migrating workloads in an orderly fashion. For planned migration to succeed, both sites must be running and fully functional.
Disaster recovery does not require that both sites be up and running, and it can be initiated in the event of the protected site going offline unexpectedly. During a disaster recovery operation, failure of operations on the protected site is reported, but otherwise ignored.
Site Recovery Manager orchestrates the recovery process with the replication mechanisms, to minimize data loss and system downtime.
Planned Migration
Planned migration is a vCenter Site Recovery Manager workflow that enables application-consistent migration of virtual machine workloads with zero data loss to the recovery site
Automated Failback
Automated failback provides an automated workflow to migrate virtual machines back to the protected site after the recovery site is restored.
About Storage Replication Adapters and Array Managers
An SRA is a program provided by a storage array vendor that enables vCenter Site Recovery Manager to work with the vendor’s array.
Functions performed by SRAs:
An SRA is used by an array manager, a vCenter Site Recovery Manager component that helps to identify available arrays and replicated LUNs.
PowerFlex SRA – Architecture
Failover and Planned Migration with vCenter Site Recovery Manager Recovery Plans
Unplanned Failover – Recover from unexpected site failure:
The most critical but least frequent use case:
Preventive Failover – Anticipate potential data center outages:
Initiate preventive failover for smooth migration:
Most frequent vCenter Site Recovery Manager use case:
Ensure smooth site migrations:
Planned Migration and Application Consistency
Planned migration ensures application consistency and no data loss during migration by providing the following:
Recovery Testing and SRM
The ability to non-disruptively test a recovery plan is one of the most powerful features of VMware Site Recovery Manager (SRM). Frequent testing reduces risk by reducing drift between plans and desired behavior. It also provides the confidence that if a disaster strikes you are ready, knowing how SRM and your applications will respond.
An SRM recovery plan test is designed to be as close as possible to running an actual recovery plan while not disrupting the protected VMs and not impacting replication.
From a storage perspective, SRM will utilize the PowerStore snapshots at the designated testing site so replication will still keep going on and from a network perspective, you can either designate your own dedicated vSwitches that needs to be isolated from your production network or you can use the built in SRM “auto-network”, while it’s easier to go with the latter, networking will only work between the VMs running on that host during the test since, its not connected to any physical nic so really, the latter option is more of a safety belt mechanism rather than a true test scenario so you really want to designate a real, isolated network vSwitches for the test.
PowerFlex SRA Compatibility Matrix
The following table presents the Dell EMC PowerFlex SRA Compatibility Matrix; the latest versions are recommended:
| SRM |
| 8.2 (Photon OS, build 8.2.1.4805-17078489 or later) |
| 8.3 (Photon OS, build 8.3.0.4381-16356473 or later) |
To use the VMware Site Recovery Manager, the PowerFlex clusters must be configured for native replication. Refer to the to Configure and Customize PowerFlex Guide for a detailed explanation of setting up the PowerFlex clusters for native replication.
Installation
The Welcome to VMware Appliance Management dialog box appears.
Enter your credentials (default administrator user is ‘admin’), and click LOG IN.
In the SRM Appliance Management dialog box, click Storage Replication Adapters.
Click NEW ADAPTER; the New Adapter dialog box appears.
Click UPLOAD, and in the resulting file browser, navigate to and select the Dell EMC PowerFlex SRA.tar.gz file; the upload process commences.
Close the resulting Success window, confirming a successful SRA upload procedure.
| Section | Parameter | Default Value | Description | ||||||||
| client |
failover_timeout | 10 | The
failover_timeout parameter determines how long SRA attempts to wait failover procedure before a timeout error occurs. |
||||||||
|
connection_timeout |
10 seconds | The
connection_timeout parameter determines how long SRA attempts to connect before a timeout error occurs. In addition, the parameter determines how long SRA waits before making another attempt if the connection is interrupted. This parameter is measured in seconds. You can adjust this parameter according to your network configuration.
|
|||||||||
ssl |
verify | False | The verify parameter determines whether SRA validates a server SSL certificate. If the parameter set to True, SRA performs the validation. If the parameter is set to False, SRA does not perform the validation. NOTE: You must adjust this parameter if you want a secure connection. | ||||||||
| ca_path | N/A | The ca_path parameter
specifies a path to a root certificate. If verify is enabled and you are using a self-signed certificate, you should export the root certificate from the storage host, place it beside the downloaded config file and set ca_path to the certificate name if you are using the Linux version. For the Windows version of the SRA, do not set the ca_path parameter. You must import the certificate through the Windows Trust Store. NOTE: You must adjust this parameter if you want a secure connection. |
|||||||||
|
log |
retention_time | 43200 | The
retention_time parameter specify logs retention time for delete old logs |
Here you can see a demo of VMware SRM Failover with PowerFlex 3.6.
A guest post by Tomer Nahumi
