|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://188.8.131.52, 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.
Software AG helps organizations transform into Digital Enterprises, so they can differentiate from competitors and better engage customers, partners and employees. Using the Software AG Suite, companies can close the gap between business and IT to create digital systems of differentiation that drive front-line agility. We offer four on-ramps to the Digital Enterprise: alignment through collaborative process analysis; transformation through portfolio management; agility through process automation and integration; and visibility through intelligent business operations and big data.
Sep. 30, 2014 10:30 AM EDT Reads: 1,388
There will be 50 billion Internet connected devices by 2020. Today, every manufacturer has a propriety protocol and an app. How do we securely integrate these "things" into our lives and businesses in a way that we can easily control and manage? Even better, how do we integrate these "things" so that they control and manage each other so our lives become more convenient or our businesses become more profitable and/or safe? We have heard that the best interface is no interface. In his session at Internet of @ThingsExpo, Chris Matthieu, Co-Founder & CTO at Octoblu, Inc., will discuss how these devices generate enough data to learn our behaviors and simplify/improve our lives. What if we could connect everything to everything? I'm not only talking about connecting things to things but also systems, cloud services, and people. Add in a little machine learning and artificial intelligence and now we have something interesting...
Sep. 29, 2014 06:45 AM EDT Reads: 1,843
Last week, while in San Francisco, I used the Uber app and service four times. All four experiences were great, although one of the drivers stopped for 30 seconds and then left as I was walking up to the car. He must have realized I was a blogger. None the less, the next car was just a minute away and I suffered no pain. In this article, my colleague, Ved Sen, Global Head, Advisory Services Social, Mobile and Sensors at Cognizant shares his experiences and insights.
Sep. 28, 2014 09:45 AM EDT Reads: 1,513
We are reaching the end of the beginning with WebRTC and real systems using this technology have begun to appear. One challenge that faces every WebRTC deployment (in some form or another) is identity management. For example, if you have an existing service – possibly built on a variety of different PaaS/SaaS offerings – and you want to add real-time communications you are faced with a challenge relating to user management, authentication, authorization, and validation. Service providers will want to use their existing identities, but these will have credentials already that are (hopefully) irreversibly encoded. In his session at Internet of @ThingsExpo, Peter Dunkley, Technical Director at Acision, will look at how this identity problem can be solved and discuss ways to use existing web identities for real-time communication.
Sep. 27, 2014 11:30 PM EDT Reads: 1,875
Can call centers hang up the phones for good? Intuitive Solutions did. WebRTC enabled this contact center provider to eliminate antiquated telephony and desktop phone infrastructure with a pure web-based solution, allowing them to expand beyond brick-and-mortar confines to a home-based agent model. It also ensured scalability and better service for customers, including MUY! Companies, one of the country's largest franchise restaurant companies with 232 Pizza Hut locations. This is one example of WebRTC adoption today, but the potential is limitless when powered by IoT. Attendees will learn real-world benefits of WebRTC and explore future possibilities, as WebRTC and IoT intersect to improve customer service.
Sep. 27, 2014 10:30 PM EDT Reads: 1,797
From telemedicine to smart cars, digital homes and industrial monitoring, the explosive growth of IoT has created exciting new business opportunities for real time calls and messaging. In his session at Internet of @ThingsExpo, Ivelin Ivanov, CEO and Co-Founder of Telestax, will share some of the new revenue sources that IoT created for Restcomm – the open source telephony platform from Telestax. Ivelin Ivanov is a technology entrepreneur who founded Mobicents, an Open Source VoIP Platform, to help create, deploy, and manage applications integrating voice, video and data. He is the co-founder of TeleStax, an Open Source Cloud Communications company that helps the shift from legacy IN/SS7 telco networks to IP-based cloud comms. An early investor in multiple start-ups, he still finds time to code for his companies and contribute to open source projects.
Sep. 27, 2014 10:30 PM EDT Reads: 2,259
The Internet of Things (IoT) promises to create new business models as significant as those that were inspired by the Internet and the smartphone 20 and 10 years ago. What business, social and practical implications will this phenomenon bring? That's the subject of "Monetizing the Internet of Things: Perspectives from the Front Lines," an e-book released today and available free of charge from Aria Systems, the leading innovator in recurring revenue management.
Sep. 27, 2014 09:45 PM EDT Reads: 2,454
The Internet of Things will put IT to its ultimate test by creating infinite new opportunities to digitize products and services, generate and analyze new data to improve customer satisfaction, and discover new ways to gain a competitive advantage across nearly every industry. In order to help corporate business units to capitalize on the rapidly evolving IoT opportunities, IT must stand up to a new set of challenges.
Sep. 27, 2014 08:45 PM EDT Reads: 2,331
There’s Big Data, then there’s really Big Data from the Internet of Things. IoT is evolving to include many data possibilities like new types of event, log and network data. The volumes are enormous, generating tens of billions of logs per day, which raise data challenges. Early IoT deployments are relying heavily on both the cloud and managed service providers to navigate these challenges. In her session at 6th Big Data Expo®, Hannah Smalltree, Director at Treasure Data, to discuss how IoT, Big Data and deployments are processing massive data volumes from wearables, utilities and other machines.
Sep. 27, 2014 01:00 PM EDT Reads: 2,015
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 continue to grow at a rapid pace for the next several decades. 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!
Sep. 27, 2014 11:00 AM EDT Reads: 2,176
P2P RTC will impact the landscape of communications, shifting from traditional telephony style communications models to OTT (Over-The-Top) cloud assisted & PaaS (Platform as a Service) communication services. The P2P shift will impact many areas of our lives, from mobile communication, human interactive web services, RTC and telephony infrastructure, user federation, security and privacy implications, business costs, and scalability. In his session at Internet of @ThingsExpo, Erik Lagerway, Co-founder of Hookflash, will walk through the shifting landscape of traditional telephone and voice services to the modern P2P RTC era of OTT cloud assisted services.
Sep. 26, 2014 11:45 PM EDT Reads: 1,507
While great strides have been made relative to the video aspects of remote collaboration, audio technology has basically stagnated. Typically all audio is mixed to a single monaural stream and emanates from a single point, such as a speakerphone or a speaker associated with a video monitor. This leads to confusion and lack of understanding among participants especially regarding who is actually speaking. Spatial teleconferencing introduces the concept of acoustic spatial separation between conference participants in three dimensional space. This has been shown to significantly improve comprehension and conference efficiency.
Sep. 26, 2014 10:45 PM EDT Reads: 1,445
The Internet of Things is tied together with a thin strand that is known as time. Coincidentally, at the core of nearly all data analytics is a timestamp. When working with time series data there are a few core principles that everyone should consider, especially across datasets where time is the common boundary. In his session at Internet of @ThingsExpo, Jim Scott, Director of Enterprise Strategy & Architecture at MapR Technologies, will discuss single-value, geo-spatial, and log time series data. By focusing on enterprise applications and the data center, he will use OpenTSDB as an example to explain some of these concepts including when to use different storage models.
Sep. 26, 2014 07:45 PM EDT Reads: 2,266
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 Controller™ Technology (SVCT) to eliminate the I/O blender effect and accelerate applications Gridstore delivers vmOptimized™ Storage that self-optimizes to each application or VM across both virtual and physical environments. Leveraging a grid architecture, Gridstore delivers the first end-to-end storage QoS to ensure the most important App or VM performance is never compromised. The storage grid, that uses Gridstore’s performance optimized nodes or capacity optimized nodes, starts with as few a...
Sep. 26, 2014 06:15 PM EDT Reads: 1,626
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. These technological reforms have not only changed computers and smartphones, but are also changing the data processing model for all information devices. In particular, in the area known as M2M (Machine-To-Machine), there are great expectations that information with a new type of value can be produced using a variety of devices and sensors saving/sharing data via the network and through large-scale cloud-type data processing. This consortium believes that attaching a huge number of devic...
Sep. 26, 2014 06:00 PM EDT Reads: 1,559
Innodisk is a service-driven provider of industrial embedded flash and DRAM storage products and technologies, with a focus on the enterprise, industrial, aerospace, and defense industries. Innodisk is dedicated to serving their customers and business partners. Quality is vitally important when it comes to industrial embedded flash and DRAM storage products. That’s why Innodisk manufactures all of their products in their own purpose-built memory production facility. In fact, they designed and built their production center to maximize manufacturing efficiency and guarantee the highest quality of our products.
Sep. 26, 2014 05:00 PM EDT Reads: 1,559
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 continue to grow at a rapid pace for the next several decades. Over the summer Gartner released its much anticipated annual Hype Cycle report and the big news is that Internet of Things has now replaced Big Data as the most hyped technology. Indeed, we're hearing more and more about this fascinating new technological paradigm. Every other IT news item seems to be about IoT and its implications on the future of digital business.
Sep. 26, 2014 10:00 AM EDT Reads: 2,038
Can call centers hang up the phones for good? Intuitive Solutions did. WebRTC enabled this contact center provider to eliminate antiquated telephony and desktop phone infrastructure with a pure web-based solution, allowing them to expand beyond brick-and-mortar confines to a home-based agent model. Download Slide Deck: ▸ Here
Sep. 26, 2014 10:00 AM EDT Reads: 1,510
BSQUARE is a global leader of embedded software solutions. We enable smart connected systems at the device level and beyond that millions use every day and provide actionable data solutions for the growing Internet of Things (IoT) market. We empower our world-class customers with our products, services and solutions to achieve innovation and success. For more information, visit www.bsquare.com.
Sep. 26, 2014 09:45 AM EDT Reads: 1,407
With the iCloud scandal seemingly in its past, Apple announced new iPhones, updates to iPad and MacBook as well as news on OSX Yosemite. Although consumers will have to wait to get their hands on some of that new stuff, what they can get is the latest release of iOS 8 that Apple made available for most in-market iPhones and iPads. Originally announced at WWDC (Apple’s annual developers conference) in June, iOS 8 seems to spearhead Apple’s newfound focus upon greater integration of their products into everyday tasks, cross-platform mobility and self-monitoring. Before you update your device, here is a look at some of the new features and things you may want to consider from a mobile security perspective.
Sep. 26, 2014 09:00 AM EDT Reads: 1,382