|By Kevin Remde||
|October 5, 2012 08:00 AM EDT||
Hyper-V in Windows Server 2012 (and in the free Microsoft Hyper-V Server include an easy start to a good disaster recovery solution: Hyper-V Replica. With Hyper-V Replica you can easily create and maintain an off-line copy – a replica – of a virtual machine on a separate virtualization host. This means, for example, that if your main location or host for an important virtual machine goes down becomes unavailable, you can easily fail-over to the replica. The copy will start up and be available in short-order.
“That sounds really great, Kevin! But what does it cost to set this up?”
“How do I set it up?”
I’m glad you asked. There are really two simple requirements to make it happen:
- You need to be running Windows Server 2012 with the Hyper-V Role installed (or Microsoft Hyper-V Server 2012) on both the source and destination virtualization hosts, and
- You need network connectivity between them. (and don’t forget the firewall)
Here are my 6 steps to working with Hyper-V Replica:
1. Configuring the Hosts to Allow Replication
In Hyper-V Manager, right-click on, or select the host, and choose Hyper-V Settings…
On the left, select Replication Configuration, and then enable and configure your replication options.
2. Setting up a Replica
To configure the replica using Hyper-V Manager, right click on the VM you want to replicate and choose Enable Replication…
On the Before You Begin page, click Next
On the Specify Replica Server page, Enter the name of the server that is to be the replication host.
The Specify Connection Parameters page is, um, where you specify your connection parameters.
Choose the hard disks you want to replicate on the Choose Replication VHDs page.
On the Configure Recovery History page, choose whether you want to keep just the most recent recovery point, or perhaps maintain a number of points in the past that you could recover to. You also have the option to occasionally perform a VSS copy.
On the Choose Initial Replication Method page, notice that you have options on how you want that big initial replication to take place. Maybe you don’t want to use the network for that initial large transfer, but instead would prefer to use UPS or FedEx.
Then click Finish on the summary page, and you’re all set.
If all was configured properly, you’ll see a new VM appear on the replication host that will be turned off.
3. Verifying the Replica’s Status
You can easily verify the status of your replica by selecting either your original VM or your replica VM in Hyper-V Manager, right-click the VM, click Replication, and then View Replication Health.
4. Testing the Replica
You can test your replicated machine by right-clicking on the replica VM and under Replication select Test Failover…
Pick the point in time that you want to test, and click Test Failover.
This will create a linked copy VM with the text “ – Test” appended to the name. Simply start up that VM (go ahead. It isn’t connected to the network, so it won’t interfere with anything) and verify that it is a useable machine.
5. Disaster Strikes! Time to Fail Over
The unthinkable has happened. Time to act. Your original and important production VM is no longer available.
On the replica VM, right click. Under Replication, select Failover.
Select the recovery point, and click Fail Over.
And your replica will start up configured, networked, and ready to take on Dr. Proton.
6. Removing the Replica
Easy. On both the source and replica VMs, right click. Under Replication, select Remove Replication.
Now you can safely delete your replica from the replication host.
Simple, yes? Do you have any questions?
“Can I have the failover happen automatically?”
Not natively. In its most simple form, Hyper-V Replica is a manual failover. However, because you can use PowerShell to drive this entire process, there’s no reason why you (or some third party) couldn’t develop a solution that monitors the state of the source VM and launches a script (or some automation in System Center 2012 Orchestrator) to launch the failover.
“But do I need to have Active Directory? Or do both of my virtualization hosts need to be in the same domain?”
Actually, no. You have the option of using certificate authentication to make the trusted configuration. (CLICK HERE for details on how to use certificates for Hyper-V Replica.)
“Do my virtual machines need to be running particular operating systems for this to work?”
Nope. There is nothing required of the guest operating system. You could be running the original Duke Nukum on DOS 6.22 in your VM, and this will still work.
Currently the answer to that is no. But I’ve heard this question enough times, and really it does make sense.. so I have to imagine (and that’s all I personally have to go on) that Microsoft is considering doing that. Consider the ramifications, though… setting up a replica means configuring something beyond just standing up a virtual machine in Hyper-V.. so the process has to have the ability to manipulate the hypervisor. I could see it happening sometime, but I don’t know when.
“Can I replicate machines that are in clusters? And can I replicate into or out of another cluster?”
Yes and yes. You will think of the cluster as and treat it as a single machine. And to do that there is a special role that you need to add to the cluster called the Hyper-V Replica Broker. This defines a new named entity that becomes either the source or the destination for replicas coming into or out of a cluster. For more details on this, check out this Wiki article.
“What about PowerShell? Can I use PowerShell to set up a replica? Can I use it to do the failover or even get status on current replicas?”
Yes, yes, and yes.
For example, to configure the replica destination host, you could use these commands to configure the firewall to allow inbound replication on the destination, and set a server up as a new replication host (each numbered line is a separate complete PowerShell command or script line):
- Enable-Netfirewallrule -displayname "Hyper-V Replica HTTP Listener (TCP-In)”
- Import-Module Hyper-V
- $RecoveryPort = 8080
- $ReplicaStorageLocation = “D:\Example”
- Set-VMReplicationServer -ReplicationEnabled $true -AllowedAuthenticationType Kerberos -IntegratedAuthenticationPort $RecoveryPort -DefaultStorageLocation $ReplicaStorageLocation -ReplicationAllowedFromAnyServer $true
And then to create a replication (each numbered line is a separate complete PowerShell command or script line):
- Import-Module Hyper-V
- $ReplicaServer = “Recovery1.contoso.com”
- $RecoveryPort = 8080
- $PrimaryVM1 = “CRMVM”
- $PrimaryServer = “Primary1.contoso.com”
- Enable-VMReplication -VMName $PrimaryVM1 -ReplicaServerName $ReplicaServer -ReplicaServerPort $RecoveryPort -AuthenticationType Kerberos -CompressionEnabled $true -RecoveryHistory 0
- Start-VMInitialReplication –VMName $PrimaryVM1
For the full story, here is the Microsoft online documentation of Hyper-V Replica: Hyper-V Replica Overview - http://technet.microsoft.com/en-us/library/jj134172.aspx
(NOTE: as of today, the online documents are still based on the RC code. I’m sure it will be updated soon to work with RTM.)
And to give Windows Server 2012 a try,
- CLICK HERE for the evaluation,
- CLICK HERE for the Hyper-V Server 2012 download, or
- CLICK HERE to learn more at the Microsoft Virtual Academy.
So what do you think? Good stuff? Let’s discuss in the comments.
The 4th International Internet of @ThingsExpo, co-located with the 17th International Cloud Expo - to be held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA - announces that its Call for Papers is open. The Internet of Things (IoT) is the biggest idea since the creation of the Worldwide Web more than 20 years ago.
May. 24, 2015 09:00 AM EDT Reads: 1,777
"People are a lot more knowledgeable about APIs now. There are two types of people who work with APIs - IT people who want to use APIs for something internal and the product managers who want to do something outside APIs for people to connect to them," explained Roberto Medrano, Executive Vice President at SOA Software, in this SYS-CON.tv interview at Cloud Expo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
May. 24, 2015 08:30 AM EDT Reads: 4,253
The 17th International Cloud Expo has announced that its Call for Papers is open. 17th International Cloud Expo, to be held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, APM, APIs, Microservices, Security, Big Data, Internet of Things, DevOps and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportunity. Submit your speaking proposal today!
May. 24, 2015 08:00 AM EDT Reads: 4,388
In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect at GE, and Ibrahim Gokcen, who leads GE's advanced IoT analytics, focused on the Internet of Things / Industrial Internet and how to make it operational for business end-users. Learn about the challenges posed by machine and sensor data and how to marry it with enterprise data. They also discussed the tips and tricks to provide the Industrial Internet as an end-user consumable service using Big Data Analytics and Industrial Cloud.
May. 24, 2015 06:30 AM EDT Reads: 5,560
Sensor-enabled things are becoming more commonplace, precursors to a larger and more complex framework that most consider the ultimate promise of the IoT: things connecting, interacting, sharing, storing, and over time perhaps learning and predicting based on habits, behaviors, location, preferences, purchases and more. In his session at @ThingsExpo, Tom Wesselman, Director of Communications Ecosystem Architecture at Plantronics, will examine the still nascent IoT as it is coalescing, including what it is today, what it might ultimately be, the role of wearable tech, and technology gaps stil...
May. 24, 2015 05:00 AM EDT Reads: 4,465
The explosion of connected devices / sensors is creating an ever-expanding set of new and valuable data. In parallel the emerging capability of Big Data technologies to store, access, analyze, and react to this data is producing changes in business models under the umbrella of the Internet of Things (IoT). In particular within the Insurance industry, IoT appears positioned to enable deep changes by altering relationships between insurers, distributors, and the insured. In his session at @ThingsExpo, Michael Sick, a Senior Manager and Big Data Architect within Ernst and Young's Financial Servi...
May. 24, 2015 05:00 AM EDT Reads: 4,941
17th Cloud Expo, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud strategy. Meanwhile, 94% of enterprises are using some form of XaaS – software, platform, and infrastructure as a service.
May. 24, 2015 05:00 AM EDT Reads: 2,486
The Workspace-as-a-Service (WaaS) market will grow to $6.4B by 2018. In his session at 16th Cloud Expo, Seth Bostock, CEO of IndependenceIT, will begin by walking the audience through the evolution of Workspace as-a-Service, where it is now vs. where it going. To look beyond the desktop we must understand exactly what WaaS is, who the users are, and where it is going in the future. IT departments, ISVs and service providers must look to workflow and automation capabilities to adapt to growing demand and the rapidly changing workspace model.
May. 24, 2015 04:30 AM EDT Reads: 3,229
Since 2008 and for the first time in history, more than half of humans live in urban areas, urging cities to become “smart.” Today, cities can leverage the wide availability of smartphones combined with new technologies such as Beacons or NFC to connect their urban furniture and environment to create citizen-first services that improve transportation, way-finding and information delivery. In her session at @ThingsExpo, Laetitia Gazel-Anthoine, CEO of Connecthings, will focus on successful use cases.
May. 24, 2015 04:00 AM EDT Reads: 5,051
One of the biggest impacts of the Internet of Things is and will continue to be on data; specifically data volume, management and usage. Companies are scrambling to adapt to this new and unpredictable data reality with legacy infrastructure that cannot handle the speed and volume of data. In his session at @ThingsExpo, Don DeLoach, CEO and president of Infobright, will discuss how companies need to rethink their data infrastructure to participate in the IoT, including: Data storage: Understanding the kinds of data: structured, unstructured, big/small? Analytics: What kinds and how responsiv...
May. 24, 2015 04:00 AM EDT Reads: 4,556
Building low-cost wearable devices can enhance the quality of our lives. In his session at Internet of @ThingsExpo, Sai Yamanoor, Embedded Software Engineer at Altschool, provided an example of putting together a small keychain within a $50 budget that educates the user about the air quality in their surroundings. He also provided examples such as building a wearable device that provides transit or recreational information. He then reviewed the resources available to build wearable devices at home including open source hardware, the raw materials required and the options available to power s...
May. 24, 2015 03:30 AM EDT Reads: 4,057
With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo in Silicon Valley. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be! Internet of @ThingsExpo, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 17th Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The Internet of Things (IoT) is the most profound change in personal an...
May. 24, 2015 03:00 AM EDT Reads: 2,768
DevOps tends to focus on the relationship between Dev and Ops, putting an emphasis on the ops and application infrastructure. But that’s changing with microservices architectures. In her session at DevOps Summit, Lori MacVittie, Evangelist for F5 Networks, will focus on how microservices are changing the underlying architectures needed to scale, secure and deliver applications based on highly distributed (micro) services and why that means an expansion into “the network” for DevOps.
May. 24, 2015 03:00 AM EDT Reads: 2,967
How do APIs and IoT relate? The answer is not as simple as merely adding an API on top of a dumb device, but rather about understanding the architectural patterns for implementing an IoT fabric. There are typically two or three trends: Exposing the device to a management framework Exposing that management framework to a business centric logic Exposing that business layer and data to end users. This last trend is the IoT stack, which involves a new shift in the separation of what stuff happens, where data lives and where the interface lies. For instance, it's a mix of architectural styles ...
May. 24, 2015 03:00 AM EDT Reads: 5,774
The 3rd International @ThingsExpo, co-located with the 16th International Cloud Expo – to be held June 9-11, 2015, at the Javits Center in New York City, NY – is now accepting Hackathon proposals. Hackathon sponsorship benefits include general brand exposure and increasing engagement with the developer ecosystem. At Cloud Expo 2014 Silicon Valley, IBM held the Bluemix Developer Playground on November 5 and ElasticBox held the DevOps Hackathon on November 6. Both events took place on the expo floor. The Bluemix Developer Playground, for developers of all levels, highlighted the ease of use of...
May. 24, 2015 02:30 AM EDT Reads: 4,372
We’re no longer looking to the future for the IoT wave. It’s no longer a distant dream but a reality that has arrived. It’s now time to make sure the industry is in alignment to meet the IoT growing pains – cooperate and collaborate as well as innovate. In his session at @ThingsExpo, Jim Hunter, Chief Scientist & Technology Evangelist at Greenwave Systems, will examine the key ingredients to IoT success and identify solutions to challenges the industry is facing. The deep industry expertise behind this presentation will provide attendees with a leading edge view of rapidly emerging IoT oppor...
May. 24, 2015 02:30 AM EDT Reads: 5,005
Connected devices and the Internet of Things are getting significant momentum in 2014. In his session at Internet of @ThingsExpo, Jim Hunter, Chief Scientist & Technology Evangelist at Greenwave Systems, examined three key elements that together will drive mass adoption of the IoT before the end of 2015. The first element is the recent advent of robust open source protocols (like AllJoyn and WebRTC) that facilitate M2M communication. The second is broad availability of flexible, cost-effective storage designed to handle the massive surge in back-end data in a world where timely analytics is e...
May. 24, 2015 02:00 AM EDT Reads: 6,221
We certainly live in interesting technological times. And no more interesting than the current competing IoT standards for connectivity. Various standards bodies, approaches, and ecosystems are vying for mindshare and positioning for a competitive edge. It is clear that when the dust settles, we will have new protocols, evolved protocols, that will change the way we interact with devices and infrastructure. We will also have evolved web protocols, like HTTP/2, that will be changing the very core of our infrastructures. At the same time, we have old approaches made new again like micro-services...
May. 24, 2015 01:30 AM EDT Reads: 5,384
SYS-CON Events announced today that Gridstore™, the leader in hyper-converged infrastructure purpose-built to optimize Microsoft workloads, will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. Gridstore™ is the leader in hyper-converged infrastructure purpose-built for Microsoft workloads and designed to accelerate applications in virtualized environments. Gridstore’s hyper-converged infrastructure is the industry’s first all flash version of HyperConverged Appliances that include both compute and storag...
May. 24, 2015 01:15 AM EDT Reads: 6,229
For years, we’ve relied too heavily on individual network functions or simplistic cloud controllers. However, they are no longer enough for today’s modern cloud data center. Businesses need a comprehensive platform architecture in order to deliver a complete networking suite for IoT environment based on OpenStack. In his session at @ThingsExpo, Dhiraj Sehgal from PLUMgrid will discuss what a holistic networking solution should really entail, and how to build a complete platform that is scalable, secure, agile and automated.
May. 24, 2015 01:00 AM EDT Reads: 4,352