Click here to close now.

Welcome!

Microservices Journal Authors: Carmen Gonzalez, Elizabeth White, Liz McMillan, Alena Prokharchyk, Leo Reiter

Related Topics: Virtualization, Java, Microservices Journal, .NET, Web 2.0, Cloud Expo

Virtualization: Blog Feed Post

Midokura - The SDN with a Hive Mind

Centralized control, decentralized execution comes to life with Midokura's MidoNet

Whether bees or Martians, science or science-fiction, the notion of a hive mind is one that pops up frequently within the realm of psychology, philosophy, theology, science and, last but not least, technology. A hive mind is one that has a collective memory, sharing information from the past and present with every other member of the hive.

This capability (if it really exists) enables incredible resiliency on the population as a whole, because every member of the population has the information necessary to replace another at any moment. This concept has been applied to scaling applications since scaling applications because a necessity. If applications share session state information – usually by sharing a session data base – then any instance can immediately take over for another without disrupting a user session. Like bees, there is no need for on-the-job-training, it just "knows" – as though it tapped into a shared database full of not only standard hive knowledge but of the current state of the hive.

shared-session-arch

This concept is partially included in many SDN implementations, with varying degrees of success. In the most common, centralized-controller model of SDN a singular entity (the controller) maintains this vault of knowledge but disseminates only partial views of that state to relevant pieces of the infrastructure. Thus it is not a fully participative hive mind, but a partial one. This leads to over-reliance on the controller, which is responsible not just for management of the shared knowledge but of dissemination. Like the queen bee, loss of the controller is devastating to the ability of the controller-focused SDN to function.

Midokura, offers a new model with a more complete collective "hive mind" that inherently supports resilient software-defined networks and alleviates the potential risk of relying on a singular entity through which to disseminate state of the network.

MidoNet

Midokura is a global startup focused on network virtualization. It officially entered the US market in mid-October 2012 with the introduction of its primary solution: MidoNet.

 

MidoNet virtualizes the network stack for popular cloud platforms such as OpenStack®. Midokura’s approach not only adds automation that significantly reduces the human cost (OPEX) of managing the network, but also impacts the overall economics of cloud computing (CAPEX) by simplifying network requirements.

MidoNet is a distributed, de-centralized, multi-layer software defined virtual network solution for IaaS. By taking an overlay-based approach to network virtualization, MidoNet sits on top of any IP-connected network, and pushes the network intelligence to the edge of the network, in software.

-- Midokura Press Release

 

Cutting through the marketing speak, MidoNet is a fabric of distributed, software-defined networking services. It requires no specialized hardware infrastructure, but rather turns any Linux-based host running the Open vSwitch kernel module and the MidoNet agent into a node on a fully-meshed, L2-4 virtual network fabric.The network executes on a role-based networking principle, with each node able to execute on a broad set of L2-4 policies based on its assigned role in the flow. By taking an overlay-based approach to network virtualization, MidoNet can be deployed atop any existing network, using traditional L2/L3 connectivity as the means to create and utilize its peer-to-peer virtualized tunnels.

midonet-2 MidoNet applies faithfully the idea of centralized management coupled with de-centralized execution.Traditional edge services are applied at the perimeter of the network using virtual policy execution, and then packets are routed via a tunnel to the designated end-point.  Policies are not so much deployed as they are simply applied at the appropriate ingress node. Each node may play multiple roles, guided by the process governing specific flows.

Failure, then, is inherently managed by the ability of any edge node to apply the appropriate policies based on the role being executed. There is no reliance on a controller - commonly associated with SDN implementations – because local agents manage the application of appropriate policies on ingress and egress traffic. It's a "shared session" approach to networking, in which the entire state of the network is stored in scalable database systems and distributed throughout the network. Just as is the case with "shared session" applications, failure in any given node simply means flows are directed through a different node – which has complete knowledge of all the information previously known to the failed node by virtue of sharing the network state database.

Like a hive mind, every node knows what every other node knows – and has known – and it is only the roles assigned to any given node that indicates a difference in how that node executes on traffic.

The difference between MidoNet's architecture and the centralized architecture of a controller-based SDN is in the execution. While both models "share" state and configuration, ostensibly, a controller-based SDN relies on centralized execution. MidoNet does not, leveraging shared state and configuration as a means to enable resiliency.

MidoNet does not come without questions. Any agent-based system brings with it overhead, and MidoNet is no exception. The question becomes how much overhead and does it significantly impact performance of the host system. Similarly, how many roles can a single node assume before it becomes overwhelmed? How well does MidoNet react to failures in the underlying L2/L3 physical network?

And while MidoNet offers a mix of stateless and stateful services, the higher up the stack one traverses, the less robust such services become. Layer 4 load balancing as currently offered by MidoNet is acceptable for simple load balancing, but depending on the application and demand may result in uneven distribution that can make capacity planning and elasticity less efficient and more difficult to perform.

Also problematic with any simple L4 load balancing service are issues with application dependencies on persistence and topological architecture and the resulting impact on load balancing algorithms. Midokura does not refute the unique challenges associated with moving up the stack – nor with the rudimentary nature of its existing L4 services – but believes these challenges can eventually be addressed.

All in all, MidoNet is an impressive adaption of SDN principles into a more resilient, flexible model. The application of a shared session architecture combined with role-based networking is a fascinating twist on the more common centralized control and command model put forth by competing SDN players.

Read the original blog entry...

More Stories By Lori MacVittie

Lori MacVittie is responsible for education and evangelism of application services available across F5’s entire product suite. Her role includes authorship of technical materials and participation in a number of community-based forums and industry standards organizations, among other efforts. MacVittie has extensive programming experience as an application architect, as well as network and systems development and administration expertise. Prior to joining F5, MacVittie was an award-winning Senior Technology Editor at Network Computing Magazine, where she conducted product research and evaluation focused on integration with application and network architectures, and authored articles on a variety of topics aimed at IT professionals. Her most recent area of focus included SOA-related products and architectures. She holds a B.S. in Information and Computing Science from the University of Wisconsin at Green Bay, and an M.S. in Computer Science from Nova Southeastern University.

@MicroservicesExpo Stories
There is no doubt that Big Data is here and getting bigger every day. Building a Big Data infrastructure today is no easy task. There are an enormous number of choices for database engines and technologies. To make things even more challenging, requirements are getting more sophisticated, and the standard paradigm of supporting historical analytics queries is often just one facet of what is needed. As Big Data growth continues, organizations are demanding real-time access to data, allowing immed...
The world's leading Cloud event, Cloud Expo has launched Microservices Journal on the SYS-CON.com portal, featuring over 19,000 original articles, news stories, features, and blog entries. DevOps Journal is focused on this critical enterprise IT topic in the world of cloud computing. Microservices Journal offers top articles, news stories, and blog posts from the world's well-known experts and guarantees better exposure for its authors than any other publication. Follow new article posts on T...
SYS-CON Events announced today that MangoApps 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., and the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. MangoApps provides private all-in-one social intranets allowing workers to securely collaborate from anywhere in the world and from any device. Social, mobile, and eas...
One of the most frequently requested Rancher features, load balancers are used to distribute traffic between docker containers. Now Rancher users can configure, update and scale up an integrated load balancing service to meet their application needs, using either Rancher's UI or API. To implement our load balancing functionality we decided to use HAproxy, which is deployed as a contianer, and managed by the Rancher orchestration functionality. With Rancher's Load Balancing capability, users ...
There are 182 billion emails sent every day, generating a lot of data about how recipients and ISPs respond. Many marketers take a more-is-better approach to stats, preferring to have the ability to slice and dice their email lists based numerous arbitrary stats. However, fundamentally what really matters is whether or not sending an email to a particular recipient will generate value. Data Scientists can design high-level insights such as engagement prediction models and content clusters that a...
What’s hot in today’s cloud computing world? Containers are fast becoming a viable alternative to virtualization for the right use cases. But to understand why containers can be a better option, we need to first understand their origins. In basic terms, containers are application-centric environments that help isolate and run workloads far more efficiently than the traditional hypervisor technology found in commodity cloud Infrastructure as a Service. Modern operating systems (Linux, Windows, e...

As a company making software for Continuous Delivery and Devops at scale, at XebiaLabs we’re pretty much always in discussions with users about the benefits and challenges of new development styles, application architectures, and runtime platforms. Unsurprisingly, many of these discussions right now focus on microservices on the application side and containers and related frameworks […]

The post May. 3, 2015 10:00 AM EDT  Reads: 1,725

SYS-CON Events announced today the IoT Bootcamp – Jumpstart Your IoT Strategy, being held June 9–10, 2015, in conjunction with 16th Cloud Expo and Internet of @ThingsExpo at the Javits Center in New York City. This is your chance to jumpstart your IoT strategy. Combined with real-world scenarios and use cases, the IoT Bootcamp is not just based on presentations but includes hands-on demos and walkthroughs. We will introduce you to a variety of Do-It-Yourself IoT platforms including Arduino, Ras...
The cloud has transformed how we think about software quality. Instead of preventing failures, we must focus on automatic recovery from failure. In other words, resilience trumps traditional quality measures. Continuous delivery models further squeeze traditional notions of quality. Remember the venerable project management Iron Triangle? Among time, scope, and cost, you can only fix two or quality will suffer. Only in today's DevOps world, continuous testing, integration, and deployment upend...
Financial services organizations were among the earliest enterprise adopters of cloud computing. The ability to leverage massive compute, storage and networking resources via RESTful APIs and automated tools like Chef and Puppet made it possible for their high-horsepower IT users to develop a whole new array of applications. Companies like Wells Fargo, Fidelity and BBVA are visible, vocal and engaged supporters of the OpenStack community, running production clouds for applications ranging from d...
Chuck Piluso will present a study of cloud adoption trends and the power and flexibility of IBM Power and Pureflex cloud solutions. Speaker Bio: Prior to Data Storage Corporation (DSC), Mr. Piluso founded North American Telecommunication Corporation, a facilities-based Competitive Local Exchange Carrier licensed by the Public Service Commission in 10 states, serving as the company's chairman and president from 1997 to 2000. Between 1990 and 1997, Mr. Piluso served as chairman & founder of ...
To manage complex web services with lots of calls to the cloud, many businesses have invested in Application Performance Management (APM) and Network Performance Management (NPM) tools. Together APM and NPM tools are essential aids in improving a business's infrastructure required to support an effective web experience... but they are missing a critical component - Internet visibility. Internet connectivity has always played a role in customer access to web presence, but in the past few years u...
Working with Big Data is challenging, especially when decision makers depend on market insights and intelligence from your data but don't have quick access to it or find it unusable. In their session at 6th Big Data Expo, Ian Khan, Global Strategic Positioning & Brand Manager at Solgenia; Zel Bianco, President, CEO and Co-Founder of Interactive Edge of Solgenia; and Ermanno Bonifazi, CEO & Founder at Solgenia, discussed how a revolutionary cloud-based BI along with mobile analytics is already c...
Operationalizing the network continues to be a driving force behind DevOps and SDN. The ability to solve real problems using programmability to automate and orchestrate infrastructure provisioning and configuration across the application release process remains the hope for many interested in one or the other - and often times both. A recent Avaya sponsored, Dynamic Markets survey (reg required) dove deep into the demesne of SDN and found that many of the problems companies have - and expect ...
We just finished the first O’Reilly Software Architecture Conference and the overwhelming most popular topic was microservices. Why all the hype about an architectural style? Microservices are the first post-DevOps revolution architecture. The DevOps revolution highlighted how much inadvertent friction an outdated operations mindset can cause, starting the move towards automating away manual tasks.
Cloud computing seems destined to be the way enterprises will use information technology. The drastic cost reductions and impressive operational improvements make the transition an unstoppable trend. The “What is cloud computing?” question now, however, seems to be morphing into “Where is cloud computing going?” While software-as-a-service (SaaS) providers see their market rocketing upward as the easiest and quickest path for cloud adoption, infrastructure-as-a-service providers are suffering...
This is my first blog post at AppDynamics, and I have to say that it’s great to be aboard. It’s been a hectic first couple of weeks, but the energy, enthusiasm and friendliness of everyone I have met has made me very excited about 2015! AppDynamics has a market leading APM and analytics platform but it also takes great people to make a great company – and AppDynamics has a wealth of talent! So to start my blogging life at AppDynamics I want to focus on something that is a red-hot buzzword in IT...
Software is eating the world. Companies that were not previously in the technology space now find themselves competing with Google and Amazon on speed of innovation. As the innovation cycle accelerates, companies must embrace rapid and constant change to both applications and their infrastructure, and find a way to deliver speed and agility of development without sacrificing reliability or efficiency of operations. In her Day 2 Keynote DevOps Summit, Victoria Livschitz, CEO of Qubell, discussed...
SYS-CON Events announced today that Vicom Computer Services, Inc., a provider of technology and service 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. They are located at booth #427. Vicom Computer Services, Inc. is a progressive leader in the technology industry for over 30 years. Headquartered in the NY Metropolitan area. Vicom provides products and services based on today’s requirements...
SYS-CON Events announced today that Blue Box has been named “Bronze Sponsor” of SYS-CON's DevOps Summit New York, which will take place June 9-11, 2015, at the Javits Center in New York City, NY. Blue Box delivers Private Cloud as a Service (PCaaS) to a worldwide customer base. Built on a technology platform leveraging decades of operational expertise in cloud and distributed systems, Blue Box Cloud is a managed private cloud product available in both hosted and on-prem versions. Each Blue Box ...