|By Lori MacVittie||
|May 7, 2010 06:50 AM EDT||
Although “rapid elasticity” is part of NIST’s definition of cloud computing, it may be interesting to note that many cloud computing environments don’t include this capability at all – or charge you extra for it. Many providers offer the means by which you can configure a load balancing service and manually add or remove instances, but there may not be a way to automate that process. If it’s manual, it’s certain “rapid” in the sense that’s it’s probably faster than you can do it (because you’d have to acquire hardware and deploy the application, as opposed to simply hitting a button and “cloning” the environment ‘out there’) but it’s not necessarily as fast as it could be (because it’s manual) nor is it automated. There’s a number of reasons for that – but we’ll get to that later. First, let’s look at how auto-scaling is supposed to work, at least theoretically.
1. Some external entity that is monitoring capacity for “Application A” triggers an event that indicates a new instance is required to maintain availability. This external entity could be an APM solution, the cloud management console, or a custom developed application. How it determines capacity limitations is variable and might be based solely on VM status (via VMware APIs), data received from the load balancer, or a combination thereof.
2. A new instance is launched. This is accomplished via the cloud management console or an external API as part of a larger workflow/orchestration.
3. The external entity grabs the IP address of the newly launched instance and instructs the load balancer to add it to the pool for resources for “Application A.” This is accomplished via the standards-based API which presents the configuration and management control plane of the load balancer to external consumers as services.
4. The load balancer adds the new application instance to the appropriate pool and as soon as it has confirmation that the instance is available and responding to requests, begins to direct traffic to the instance.
This process is easily reversed upon termination of an instance. Note: there are other infrastructure components that are involved in this process that must also be notified on launch and decommission, but for this discussion we’re just looking at the load balancing piece as it’s critical to the concept of auto-scaling.
The important thing to note here is that the process for adding – and subsequently using – the new application instance to the load balancer should be automatic. Once the instance is launched, all that remains is to inform the load balancer that a new instance is available. The load balancer should take care of the rest, and it should do so transparently. That means no interruption of service, no reboot, no reload the configuration, nothing. Similarly the termination and removal of the application instance from the pool of resources should be as seamless and non-disruptive. It does not matter whether the load balancing solution is hardware or a VNA (Virtual Network Appliance) as long as it has an API through which available resources can be added and removed on-demand.
This process is relatively straightforward and can even be accomplished without the “external entity” by directly integrating the application with the load balancing service. By hooking the appropriate setup and tear-down routines in the application, the load balancer can be automatically instructed to perform the appropriate actions whenever an instance of that application is launched or terminated.
1. Application is initialized and instructs load balancer to add it to the appropriate resource pool.
2. Load balancer adds the application instance to the right pool of resources and begins directing traffic to it as configured.
3. Application is terminating, instructs load balancer to remove it from the available resource pool.
4. Load balancer removes the application instance from pool of resources.
This requires tighter coupling of the load balancer with the application, however, which may be less than ideal unless you are very tied to your load balancing solution. The advantage of this solution is that regardless of whether the application is “physical” or “virtual”, the same process occurs, which lets you mix and match and be a lot more flexible in your architecture.
It’s not, if the load balancer has an API. Herein lies the problem: building out an automated, dynamic infrastructure requires the ability to communicate, to collaborate, to integrate network and application network infrastructure with the data center management system. That means some sort of API is required. Oh, you could do it with a little SSH and a local script, but that’s not nearly as efficient or flexible as using an API that’s designed to be leveraged for integration and automation in the first place.
While just about every hardware load balancer (and their virtualized equivalents) is enabled with a standards-based control plane, most web-server-turned-rudimentary-load-balancers are not enabled with an API that allows this level of integration. That means hacking the system with scripts that inject or remove configurations, forcing reloading of the configuration (or worse, stopping and starting the system) and most likely interrupting service. Not only does it mean hacking the system but the scripts must somehow pull from customer-specific meta-data information in order to properly configure the load balancing solution.
So in order to achieve this in a way that maintains availability and is easy to use and essentially a multi-tenant solution needs the services of an API. When it comes to integration there are few options and the most flexible method is to use a standards-based API to manage a solution that supports the notion of multi-tenant configuration natively. The problem is, of course, that most of the API-enabled (and therefore easy to integrate and automate) load balancers cost money. It requires an investment, up front, and many folks just aren’t willing to do that. Except they are doing that; they’re just trading capital expenses for longer-term development of scripts and research that approximate (but never quite reach the reliability) of an API that’s been specifically developed, tested, and deployed for the purpose of integrating with external management systems and scripts. What’s worse is that eventually most of these solutions developed on sweat and scripts will end up turning to a more sophisticated, proven API-based solution anyway because of the inherent challenges associated with scalability of the solution itself. That results in a financially inefficient way to go about building a dynamic infrastructure that supports rapid, elastic scalability.
So many organizations faced with the choice of investing in a more robust, flexible solution when they’ve already sunk a lot of time, effort, and money into their existing “free” solution, simply continue to hack and paste and shove a square peg into a round hole, which means auto-scaling never works quite as expected and advanced features come at a snail’s pace because of the difficulty in scripting and integration.
It doesn’t have to be so hard, but you do have to view load balancing for what it is: a key component of the cloud computing strategy, and give it the focus it deserves, even if that means it’ll cost you more up front because in the end it’ll cost you far less than the alternative.
When an enterprise builds a hybrid IaaS cloud connecting its data center to one or more public clouds, security is often a major topic along with the other challenges involved. Security is closely intertwined with the networking choices made for the hybrid cloud. Traditional networking approaches for building a hybrid cloud try to kludge together the enterprise infrastructure with the public cloud. Consequently this approach requires risky, deep "surgery" including changes to firewalls, subnets...
Oct. 30, 2014 07:00 PM EDT Reads: 1,518
Ixia develops amazing products so its customers can connect the world. Ixia helps its customers provide an always-on user experience through fast, secure delivery of dynamic connected technologies and services. Through actionable insights that accelerate and secure application and service delivery, Ixia's customers benefit from faster time to market, optimized application performance and higher-quality deployments.
Oct. 30, 2014 07:00 PM EDT Reads: 1,828
SYS-CON Events announced today that Stratogent will exhibit at SYS-CON's 15th International Cloud Expo®, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Stratogent is a custom managed services organization based in San Mateo, California. We design, implement, and support mission critical infrastructure 24x7 on premises, in datacenters and in the Cloud. Since 2005, we have acted as an extension of internal IT teams, achieving a customer reten...
Oct. 30, 2014 06:45 PM EDT Reads: 2,137
SYS-CON Events announced today that Harbinger Systems will exhibit at SYS-CON's 15th International Cloud Expo®, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Harbinger Systems is a global company providing software technology services. Since 1990, Harbinger has developed a strong customer base worldwide. Its customers include software product companies ranging from hi-tech start-ups in Silicon Valley to leading product companies in the US a...
Oct. 30, 2014 06:00 PM EDT Reads: 3,155
SYS-CON Events announces a new pavilion on the Cloud Expo floor where WebRTC converges with the Internet of Things. Pavilion will showcase WebRTC and the Internet of Things. The Internet of Things (IoT) is the most profound change in personal and enterprise IT since the creation of the Worldwide Web more than 20 years ago. All major researchers estimate there will be tens of billions devices--computers, smartphones, tablets, and sensors – connected to the Internet by 2020. This number will con...
Oct. 30, 2014 05:30 PM EDT Reads: 2,167
The only place to be June 9-11 is Cloud Expo & @ThingsExpo 2015 East at the Javits Center in New York City. Join us there as delegates from all over the world come to listen to and engage with speakers & sponsors from the leading Cloud Computing, IoT & Big Data companies. Cloud Expo & @ThingsExpo are the leading events covering the booming market of Cloud Computing, IoT & Big Data for the enterprise. Speakers from all over the world will be hand-picked for their ability to explore the economic...
Oct. 30, 2014 05:30 PM EDT Reads: 1,190
SYS-CON Events announced today that Cloudian, Inc., the leading provider of hybrid cloud storage solutions, has been named “Bronze Sponsor” of SYS-CON's 15th International Cloud Expo®, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Cloudian is a Foster City, Calif.-based software company specializing in cloud storage. Cloudian HyperStore® is an S3-compatible cloud object storage platform that enables service providers and enterprises to bui...
Oct. 30, 2014 04:45 PM EDT Reads: 1,889
SYS-CON Events announced today that Gridstore™, the leader in software-defined storage (SDS) purpose-built for Windows Servers and Hyper-V, will exhibit at SYS-CON's 15th International Cloud Expo®, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Gridstore™ is the leader in software-defined storage purpose built for virtualization that is designed to accelerate applications in virtualized environments. Using its patented Server-Side Virtual C...
Oct. 30, 2014 02:00 PM EDT Reads: 2,538
As the Internet of Things unfolds, mobile and wearable devices are blurring the line between physical and digital, integrating ever more closely with our interests, our routines, our daily lives. Contextual computing and smart, sensor-equipped spaces bring the potential to walk through a world that recognizes us and responds accordingly. We become continuous transmitters and receivers of data. In his session at Internet of @ThingsExpo, Andrew Bolwell, Director of Innovation for HP’s Printing a...
Oct. 30, 2014 12:00 PM EDT Reads: 1,708
SAP is delivering break-through innovation combined with fantastic user experience powered by the market-leading in-memory technology, SAP HANA. In his General Session at 15th Cloud Expo, Thorsten Leiduck, VP ISVs & Digital Commerce, SAP, will discuss how SAP and partners provide cloud and hybrid cloud solutions as well as real-time Big Data offerings that help companies of all sizes and industries run better. SAP launched an application challenge to award the most innovative SAP HANA and SAP ...
Oct. 30, 2014 09:00 AM EDT Reads: 2,073
The Internet of Things (IoT) promises to evolve the way the world does business; however, understanding how to apply it to your company can be a mystery. Most people struggle with understanding the potential business uses or tend to get caught up in the technology, resulting in solutions that fail to meet even minimum business goals. In his session at Internet of @ThingsExpo, Jesse Shiah, CEO / President / Co-Founder of AgilePoint Inc., will show what is needed to leverage the IoT to transform...
Oct. 29, 2014 11:00 PM EDT Reads: 1,512
SYS-CON Events announced today that AIC, a leading provider of OEM/ODM server and storage solutions, 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. AIC is a leading provider of both standard OTS, off-the-shelf, and OEM/ODM server and storage solutions. With expert in-house design capabilities, validation, manufacturing and production, AIC's broad selection of products are highly flexible and are conf...
Oct. 29, 2014 06:00 PM EDT Reads: 1,657
We are all here because we are sold on the transformative promise of The Cloud. But what good is all of this ephemeral, on-demand infrastructure if your usage doesn't actually improve the agility and speed of your business? How must Operations adapt in order to avoid stifling your Cloud initiative? In his session at DevOps Summit, Damon Edwards, co-founder and managing partner of the DTO Solutions, will highlight the successful organizational, process, and tooling patterns of high-performing c...
Oct. 29, 2014 01:35 PM EDT Reads: 1,274
SYS-CON Events announced today that O'Reilly Media has been named “Media Sponsor” of SYS-CON's 15th International Cloud Expo®, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. O'Reilly Media spreads the knowledge of innovators through its books, online services, magazines, and conferences. Since 1978, O'Reilly Media has been a chronicler and catalyst of cutting-edge development, homing in on the technology trends that really matter and spurri...
Oct. 29, 2014 01:00 PM EDT Reads: 1,581
SYS-CON Events announced today that Aria Systems, the recurring revenue expert, has been named "Bronze Sponsor" of SYS-CON's 15th International Cloud Expo®, which will take place on November 4-6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Aria Systems helps leading businesses connect their customers with the products and services they love. Industry leaders like Pitney Bowes, Experian, AAA NCNU, VMware, HootSuite and many others choose Aria to power their recurring revenue bu...
Oct. 29, 2014 10:00 AM EDT Reads: 2,110
The Transparent Cloud-computing Consortium (abbreviation: T-Cloud Consortium) will conduct research activities into changes in the computing model as a result of collaboration between "device" and "cloud" and the creation of new value and markets through organic data processing High speed and high quality networks, and dramatic improvements in computer processing capabilities, have greatly changed the nature of applications and made the storing and processing of data on the network commonplace. ...
Oct. 29, 2014 10:00 AM EDT Reads: 2,047
Seagate has a strong track record of collaborating with others to develop better cloud solutions. The Seagate Cloud Builder Alliance program, for example, leverages the company’s knowledge of storage and cloud-optimized solutions to give cloud service providers the customized, flexible and scalable server and storage solutions to meet the high levels of service their customers demand. Seagate also is a member of the OpenStack Foundation and Open Compute Project to help define and promote open-so...
Oct. 29, 2014 09:30 AM EDT Reads: 1,930
The Internet of Things (IoT) is going to require a new way of thinking and of developing software for speed, security and innovation. This requires IT leaders to balance business as usual while anticipating for the next market and technology trends. Cloud provides the right IT asset portfolio to help today’s IT leaders manage the old and prepare for the new. Today the cloud conversation is evolving from private and public to hybrid. This session will provide use cases and insights to reinforce t...
Oct. 29, 2014 09:00 AM EDT Reads: 2,073
What process has your provider undertaken to ensure that the cloud tenant will receive predictable performance and service? What was involved in the planning? Who owns and operates the data center? What technology is being used? How is it being supported? In his session at 14th Cloud Expo, Dave Weisbrot, Cloud Business Manager for QTS, will provide the attendees a look into what it takes to stand up and stand behind a highly available certified cloud IaaS.
Oct. 29, 2014 08:30 AM EDT Reads: 1,530
I'll be hosting an SAP HANA Cloud webinar at 11am eastern time, Wednesday, October 29. You can sign up now. Featured speakers will be Allan Adler, Managing Partner, Channel Cloud Consulting, and Thorsten Leiduck, VP ISVs & Digital Commerce, SAP. Attendees will learn about • Cloud economics, hybrid cloud strategy, market size and opportunity • Introduction to SAP HANA Cloud Platform and how to: - Build new next-generation applications - Extend on-premise solutions non-disruptively throu...
Oct. 28, 2014 11:45 PM EDT Reads: 1,423