|By Adam Hoffman||
|October 3, 2012 12:15 PM EDT||
I was meeting with a small company today that has developed a SaaS solution around task and project management. It's a very cool application, and as is the fashion these days, uses subdomains to determine the end user's company as requests come to the browser. So, if I were to sign up for the application, my home url would be http://adamhoffman.getdonedone.com, whereas if you signed up (and had the unlikely name of Bill Ion), your home page would be http://billion.getdonedone.com. This is handled in ASP.NET application code on their Win2K8 servers hosted at Rackspace. The question quickly became "hey, we can do something similar in Azure, right?"
The answer is yes, and no, and yes. Let me explain.
My instant assumption was "yes", and ultimately, it is true that you can accomplish this behavior. It does, however, require that wherever you host your DNS that points to your application supports the concept of "wildcard DNS records", and more specifically, supports "wildcard CNAMEs". As it turns out, Go Daddy's DNS services don't support this, so we'll have to look elsewhere to get this functionality.
The next question you might be asking yourself now is why do we care about wildcard CNAME versus just wildcard DNS? Specifically, the answer lies in the way that Azure provides you high reliability. As a very quick DNS primer, you need to understand the difference between A records and CNAME records. Go read the link if you want the details, but the short answer is "A records point to IP addresses, CNAME records are aliases of other domain name records. OK, but why does this matter?
Well, as it turns out, when you want to put your fancy brand on your Azure based website, you can only do that by way of a CNAME record. The reason that you can't use an A record to point to your site is that your site doesn't have an IP address. Well, it does, but it's not something that you can get access to, and even if you could, it's not persistent, and will likely change. In order to avoid this problem, what you get is really a domain name that is a part of "cloudapp.net". For example, the website that I'm about to demo for you that supports wildcard subdomains is addressable by way of "wildcardsubdomain.cloudapp.net", but not by IP address. Well, OK, yes, smarty pants. It is addressable by IP as well. For example, at this moment I can also get to the same site at http://22.214.171.124, but I shouldn't rely on it. Who knows - by the time you read this, it might not work at all. If you want to know how I figured that out, check out nslookup.
The reason that's all true is that Azure relies on CNAME so that it can switch your IP around, but keep your site addressable. Why does it do it? It's mad network stuff related to load balancers, and the Azure Fabric controller, and it's done to ensure that your site has the maximum stability and uptime.
Okay, back to the problem at hand - getting our dynamic subdomains passed through to our application code to allow for multitenant applications split by the third level domain. How will we handle it? Here we go.
- First, we'll find a DNS service that supports wildcard CNAMEs.
- Next we'll configure that DNS service to point to our application.
- Finally, we'll write the application code that understands the incoming requests so that we can fork our clients appropriately.
- After finally, we'll take a look at the URL Routing features of ASP.NET and see if we can extend our example to integrate nicely with it.
On the first count, it's not actually as straightforward as you might think. For example, I've used GoDaddy to procure several of my domains (yes, I am aware of the SOPA thing, and won't get political here). As the link here reveals, wildcard CNAMEs aren't an option in GoDaddy's DNS servers, so we'll need to look elsewhere. I won't attempt to put together an exhaustive list here, but one DNS service that does support this concept is Amazon's Route 53 DNS service. Another nice feature of this is that it has an API, which actually opens up another possibility if we so chose. Our solution here to route all subdomains to a single hosted web site. An alternative to our multi-tenant single application approach would be to actually specifically provision subdomains and point them to different hosted web sites. So, instead of
*.adamhoffman.net CNAME wildcardsubdomain.cloudapp.net (which has application code that sorts it out)
we could, instead go with
customer1.adamhoffman.net CNAME customer1.cloudapp.net (which is for the customer1 domain), and
customer2.adamhoffman.net CNAME customer2.cloudapp.net (which is for the customer2 domain), and
Yes, we could do that, and with the Route 53 API, we could even provision those new CNAME records as necessary. But that's not the route we're going to use. We'd like to use the former option, and have a single wildcard CNAME record that just routes everything to our super smart application.
OK, so next, we'll get ourselves an Amazon account to set up our DNS services on Route 53. Once you've signed up, create, in Amazon's terminology, a hosted zone for the domain that we'll support wildcards on. Of course, you need to own this domain.
Take a look now at the "delegation set" that Route 53 has assigned you. There are 4 DNS servers listed here, and these are the DNS servers that you need to tell your domain registrar about so that it makes sure that requests for your domain are handed off to these Route 53 DNS servers. In my case, my registrar for adamhoffman.net is Go Daddy, so I'll use the Go Daddy tools to point to these DNS servers.
With all of this done, there's only one final step. We need to tell the DNS servers that handle adamhoffman.net that the canonical name (CNAME) for *.adamhoffman.net is really wildcardsubdomain.cloudapp.net. Look at the CNAME record for *.adamhoffman.net in the following picture. That's the secret sauce.
Developing software for the Internet of Things (IoT) comes with its own set of challenges. Security, privacy, and unified standards are a few key issues. In addition, each IoT product is comprised of (at least) three separate application components: the software embedded in the device, the back-end service, and the mobile application for the end user’s controls. Each component is developed by a different team, using different technologies and practices, and deployed to a different stack/target –...
Sep. 29, 2016 08:45 PM EDT Reads: 1,541
Why do your mobile transformations need to happen today? Mobile is the strategy that enterprise transformation centers on to drive customer engagement. In his general session at @ThingsExpo, Roger Woods, Director, Mobile Product & Strategy – Adobe Marketing Cloud, covered key IoT and mobile trends that are forcing mobile transformation, key components of a solid mobile strategy and explored how brands are effectively driving mobile change throughout the enterprise.
Sep. 29, 2016 08:45 PM EDT Reads: 2,203
Identity is in everything and customers are looking to their providers to ensure the security of their identities, transactions and data. With the increased reliance on cloud-based services, service providers must build security and trust into their offerings, adding value to customers and improving the user experience. Making identity, security and privacy easy for customers provides a unique advantage over the competition.
Sep. 29, 2016 06:15 PM EDT Reads: 3,669
SYS-CON Events announced today that Commvault, a global leader in enterprise data protection and information management, has been named “Bronze Sponsor” of SYS-CON's 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Commvault is a leading provider of data protection and information management solutions, helping companies worldwide activate their data to drive more value and business insight and to transform moder...
Sep. 29, 2016 05:15 PM EDT Reads: 2,852
Personalization has long been the holy grail of marketing. Simply stated, communicate the most relevant offer to the right person and you will increase sales. To achieve this, you must understand the individual. Consequently, digital marketers developed many ways to gather and leverage customer information to deliver targeted experiences. In his session at @ThingsExpo, Lou Casal, Founder and Principal Consultant at Practicala, discussed how the Internet of Things (IoT) has accelerated our abil...
Sep. 29, 2016 04:45 PM EDT Reads: 2,783
SYS-CON Events has announced today that Roger Strukhoff has been named conference chair of Cloud Expo and @ThingsExpo 2016 Silicon Valley. The 19th Cloud Expo and 6th @ThingsExpo will take place on November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. "The Internet of Things brings trillions of dollars of opportunity to developers and enterprise IT, no matter how you measure it," stated Roger Strukhoff. "More importantly, it leverages the power of devices and the Interne...
Sep. 29, 2016 04:45 PM EDT Reads: 3,438
Digital innovation is the next big wave of business transformation based on digital technologies of which IoT and Big Data are key components, For example: Business boundary innovation is a challenge to excavate third-party business value using IoT and BigData, like Nest Business structure innovation may propose re-building business structure from scratch, as Uber does in the taxicab industry The social model innovation is also a big challenge to the new social architecture with the design fr...
Sep. 29, 2016 04:30 PM EDT Reads: 1,340
So, you bought into the current machine learning craze and went on to collect millions/billions of records from this promising new data source. Now, what do you do with them? Too often, the abundance of data quickly turns into an abundance of problems. How do you extract that "magic essence" from your data without falling into the common pitfalls? In her session at @ThingsExpo, Natalia Ponomareva, Software Engineer at Google, provided tips on how to be successful in large scale machine learning...
Sep. 29, 2016 04:00 PM EDT Reads: 2,393
If you had a chance to enter on the ground level of the largest e-commerce market in the world – would you? China is the world’s most populated country with the second largest economy and the world’s fastest growing market. It is estimated that by 2018 the Chinese market will be reaching over $30 billion in gaming revenue alone. Admittedly for a foreign company, doing business in China can be challenging. Often changing laws, administrative regulations and the often inscrutable Chinese Interne...
Sep. 29, 2016 04:00 PM EDT Reads: 474
In his session at @ThingsExpo, Kausik Sridharabalan, founder and CTO of Pulzze Systems, Inc., will focus on key challenges in building an Internet of Things solution infrastructure. He will shed light on efficient ways of defining interactions within IoT solutions, leading to cost and time reduction. He will also introduce ways to handle data and how one can develop IoT solutions that are lean, flexible and configurable, thus making IoT infrastructure agile and scalable.
Sep. 29, 2016 03:30 PM EDT Reads: 1,627
Data is an unusual currency; it is not restricted by the same transactional limitations as money or people. In fact, the more that you leverage your data across multiple business use cases, the more valuable it becomes to the organization. And the same can be said about the organization’s analytics. In his session at 19th Cloud Expo, Bill Schmarzo, CTO for the Big Data Practice at EMC, will introduce a methodology for capturing, enriching and sharing data (and analytics) across the organizati...
Sep. 29, 2016 03:15 PM EDT Reads: 1,789
Internet of @ThingsExpo has announced today that Chris Matthieu has been named tech chair of Internet of @ThingsExpo 2016 Silicon Valley. The 6thInternet of @ThingsExpo will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
Sep. 29, 2016 03:00 PM EDT Reads: 2,830
SYS-CON Events announced today that Bsquare has been named “Silver Sponsor” of SYS-CON's @ThingsExpo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. For more than two decades, Bsquare has helped its customers extract business value from a broad array of physical assets by making them intelligent, connecting them, and using the data they generate to optimize business processes.
Sep. 29, 2016 03:00 PM EDT Reads: 2,972
A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, wh...
Sep. 29, 2016 02:00 PM EDT Reads: 3,953
Video experiences should be unique and exciting! But that doesn’t mean you need to patch all the pieces yourself. Users demand rich and engaging experiences and new ways to connect with you. But creating robust video applications at scale can be complicated, time-consuming and expensive. In his session at @ThingsExpo, Zohar Babin, Vice President of Platform, Ecosystem and Community at Kaltura, will discuss how VPaaS enables you to move fast, creating scalable video experiences that reach your...
Sep. 29, 2016 02:00 PM EDT Reads: 1,183
In his keynote at 18th Cloud Expo, Andrew Keys, Co-Founder of ConsenSys Enterprise, provided an overview of the evolution of the Internet and the Database and the future of their combination – the Blockchain. Andrew Keys is Co-Founder of ConsenSys Enterprise. He comes to ConsenSys Enterprise with capital markets, technology and entrepreneurial experience. Previously, he worked for UBS investment bank in equities analysis. Later, he was responsible for the creation and distribution of life sett...
Sep. 29, 2016 02:00 PM EDT Reads: 3,627
Cloud computing is being adopted in one form or another by 94% of enterprises today. Tens of billions of new devices are being connected to The Internet of Things. And Big Data is driving this bus. An exponential increase is expected in the amount of information being processed, managed, analyzed, and acted upon by enterprise IT. This amazing is not part of some distant future - it is happening today. One report shows a 650% increase in enterprise data by 2020. Other estimates are even higher....
Sep. 29, 2016 02:00 PM EDT Reads: 4,201
SYS-CON Events announced today that SoftLayer, an IBM Company, has been named “Gold Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2016, at the Javits Center in New York, New York. SoftLayer, an IBM Company, provides cloud infrastructure as a service from a growing number of data centers and network points of presence around the world. SoftLayer’s customers range from Web startups to global enterprises.
Sep. 29, 2016 01:45 PM EDT Reads: 1,128
19th Cloud Expo, taking place November 1-3, 2016, 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 enterpri...
Sep. 29, 2016 01:30 PM EDT Reads: 4,459
Businesses are struggling to manage the information flow and interactions between all of these new devices and things jumping on their network, and the apps and IT systems they control. The data businesses gather is only helpful if they can do something with it. In his session at @ThingsExpo, Chris Witeck, Principal Technology Strategist at Citrix, will discuss how different the impact of IoT will be for large businesses, expanding how IoT will allow large organizations to make their legacy ap...
Sep. 29, 2016 01:15 PM EDT Reads: 375