Welcome!

Apache Authors: Pat Romanski, Liz McMillan, Elizabeth White, Christopher Harrold, Janakiram MSV

Related Topics: @DevOpsSummit, Containers Expo Blog, Apache, SDN Journal

@DevOpsSummit: Blog Post

DevOps Teams Get Docker Flexibility @Ruxit | @DevOpsSummit [#DevOps]

If your applications are distributed via Docker containers to give your DevOps teams some flexibility

Network in the Cloud is No Free Lunch

If you have your applications running on AWS or a similar cloud-based solution, you’ve effectively “outsourced” your networking to the cloud as well. Of course, this can be of great value. Most significantly because it frees you from maintaining physical network infrastructure. Not having physical access to your network doesn’t however mean that you’re free from taking care of your network.

A bit of history

In traditional application architectures, network infrastructure was kept under the strict control of network teams. These teams were responsible for upgrading overloaded equipment before problems arose, identifying and replacing weak network links, resolving bottlenecks, observing latency metrics and delayed data delivery, and even detecting security threats. In other words, traditional network teams looked after all seven OSI layers.

Modern architectures need more networking than ever

In cloud-based architectures, the situation is different and the network has become even more important. Let’s imagine a typical cloud-based architecture situation. You run a datacenter with a flexible number of allocated computing instances (for example, due to the pricing model and volatile demands for CPU). Your datacenter serves distributed applications that are backed by, for example, microservices. Additionally, let’s say that your applications are distributed via Docker containers to give your DevOps teams some flexibility. In situations like this you need more networking than ever. Your network must shoulder all the communications required between the microservices. It serves as a virtual nervous system for your applications.

Even though the network is not physically available to system administrators, it still exists and requires attention. It’s often difficult to know where exactly your machines are physically hosted and how they’re connected with other hosts in your network. Related virtual machines and services can even be hosted on the same virtual host, in which case your network exists only as a memory read operation. This means, the physical network very often coexists with multiple virtual networks.

Challenges in cloud-based networks

The inability to physically access a network (OSI layers 1-2) makes it hard for DevOps teams to keep an eye on it. They can use the monitoring tools offered by their cloud provider, for example Cloud Watch, to fetch network metrics like NetworkIn and NetworkOut, but these metrics can be insufficient in detecting network problems.

Here are some of the key challenges that DevOps faces in maintaining virtual network performance:

  • Competing processes for network resources (for example, the TCP Incast problem)
  • Variable network infrastructure through new or stopped instances
  • Scalability of network load via elastic network interfaces
  • Quality of connections inside your data center
  • Quality of connections to private networks outside your data center

Monitoring network usage

Your network monitoring must be able to react to infrastructure changes such as mentioned above. In particular, it needs to be able to handle virtual network interfaces. Hence, your monitoring needs to run on your hosts and consistently keep watch for changes of your virtual infrastructure. From this position it can observe network connections between processes that communicate with other processes and services, thereby monitoring actual network usage instead of just network devices.

Infrastructure with all levels

Resource monitoring is key… and simple!

With this monitoring approach your network won’t be seen simply as a collection of network interfaces, routing tables, and security groups. Rather your network will be viewed as a limited resource used by processes and applications. This resource can be monitored along with CPU, memory, and storage, and even measured at process level. This enables full-stack application performance monitoring and the ability to trace network problems all the way up to the application level.

Network connection quality

There are a few basic network performance metrics you should keep in mind:

  • The traffic of network data (throughput) is the basic indicator for network performance.
  • The Connectivity metric provides the percentage of successfully established TCP (Transmission Control Protocol) connections and indicates accessibility of services. TCP connections may be refused or end up in timeouts, so connectivity is a good indicator of network problems between sender and receiver.
  • With respect to the quality of established TCP connections, the retransmission rate is also worth monitoring. The TCP protocol is a reliable and error-checked protocol. This means the receiver must confirm the packets sent over a network link; otherwise they are considered lost and then retransmitted by the sender. Therefore, retransmission rate is a good indicator of poor network links and overloaded network infrastructure.

The bottom line is that you shouldn’t blindly trust cloud providers regarding the health of your “outsourced” virtual network infrastructure. Virtualized networks cannot be monitored in a more or less traditional manner. They should at least be monitored from the point of view of your hosts and processes so that you have some meaningful network performance indicators.

The post Network in the Cloud is No Free Lunch appeared first on The ruxit blog.

Read the original blog entry...

More Stories By Dynatrace Blog

Building a revolutionary approach to software performance monitoring takes an extraordinary team. With decades of combined experience and an impressive history of disruptive innovation, that’s exactly what we ruxit has.

Get to know ruxit, and get to know the future of data analytics.

@ThingsExpo Stories
DX World EXPO, LLC, a Lighthouse Point, Florida-based startup trade show producer and the creator of "DXWorldEXPO® - Digital Transformation Conference & Expo" has announced its executive management team. The team is headed by Levent Selamoglu, who has been named CEO. "Now is the time for a truly global DX event, to bring together the leading minds from the technology world in a conversation about Digital Transformation," he said in making the announcement.
"Space Monkey by Vivent Smart Home is a product that is a distributed cloud-based edge storage network. Vivent Smart Home, our parent company, is a smart home provider that places a lot of hard drives across homes in North America," explained JT Olds, Director of Engineering, and Brandon Crowfeather, Product Manager, at Vivint Smart Home, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
SYS-CON Events announced today that Conference Guru has been named “Media Sponsor” of the 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. A valuable conference experience generates new contacts, sales leads, potential strategic partners and potential investors; helps gather competitive intelligence and even provides inspiration for new products and services. Conference Guru works with conference organizers to pass great deals to gre...
The Internet of Things will challenge the status quo of how IT and development organizations operate. Or will it? Certainly the fog layer of IoT requires special insights about data ontology, security and transactional integrity. But the developmental challenges are the same: People, Process and Platform. In his session at @ThingsExpo, Craig Sproule, CEO of Metavine, demonstrated how to move beyond today's coding paradigm and shared the must-have mindsets for removing complexity from the develop...
In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, led attendees through the exciting evolution of the cloud. He looked at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering m...
"Evatronix provides design services to companies that need to integrate the IoT technology in their products but they don't necessarily have the expertise, knowledge and design team to do so," explained Adam Morawiec, VP of Business Development at Evatronix, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
To get the most out of their data, successful companies are not focusing on queries and data lakes, they are actively integrating analytics into their operations with a data-first application development approach. Real-time adjustments to improve revenues, reduce costs, or mitigate risk rely on applications that minimize latency on a variety of data sources. In his session at @BigDataExpo, Jack Norris, Senior Vice President, Data and Applications at MapR Technologies, reviewed best practices to ...
Widespread fragmentation is stalling the growth of the IIoT and making it difficult for partners to work together. The number of software platforms, apps, hardware and connectivity standards is creating paralysis among businesses that are afraid of being locked into a solution. EdgeX Foundry is unifying the community around a common IoT edge framework and an ecosystem of interoperable components.
Large industrial manufacturing organizations are adopting the agile principles of cloud software companies. The industrial manufacturing development process has not scaled over time. Now that design CAD teams are geographically distributed, centralizing their work is key. With large multi-gigabyte projects, outdated tools have stifled industrial team agility, time-to-market milestones, and impacted P&L stakeholders.
"Akvelon is a software development company and we also provide consultancy services to folks who are looking to scale or accelerate their engineering roadmaps," explained Jeremiah Mothersell, Marketing Manager at Akvelon, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
"IBM is really all in on blockchain. We take a look at sort of the history of blockchain ledger technologies. It started out with bitcoin, Ethereum, and IBM evaluated these particular blockchain technologies and found they were anonymous and permissionless and that many companies were looking for permissioned blockchain," stated René Bostic, Technical VP of the IBM Cloud Unit in North America, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Conventi...
In his session at 21st Cloud Expo, Carl J. Levine, Senior Technical Evangelist for NS1, will objectively discuss how DNS is used to solve Digital Transformation challenges in large SaaS applications, CDNs, AdTech platforms, and other demanding use cases. Carl J. Levine is the Senior Technical Evangelist for NS1. A veteran of the Internet Infrastructure space, he has over a decade of experience with startups, networking protocols and Internet infrastructure, combined with the unique ability to it...
22nd International Cloud Expo, taking place June 5-7, 2018, at the Javits Center in New York City, NY, and co-located with the 1st DXWorld Expo 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 ...
"Cloud Academy is an enterprise training platform for the cloud, specifically public clouds. We offer guided learning experiences on AWS, Azure, Google Cloud and all the surrounding methodologies and technologies that you need to know and your teams need to know in order to leverage the full benefits of the cloud," explained Alex Brower, VP of Marketing at Cloud Academy, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clar...
Gemini is Yahoo’s native and search advertising platform. To ensure the quality of a complex distributed system that spans multiple products and components and across various desktop websites and mobile app and web experiences – both Yahoo owned and operated and third-party syndication (supply), with complex interaction with more than a billion users and numerous advertisers globally (demand) – it becomes imperative to automate a set of end-to-end tests 24x7 to detect bugs and regression. In th...
"MobiDev is a software development company and we do complex, custom software development for everybody from entrepreneurs to large enterprises," explained Alan Winters, U.S. Head of Business Development at MobiDev, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Coca-Cola’s Google powered digital signage system lays the groundwork for a more valuable connection between Coke and its customers. Digital signs pair software with high-resolution displays so that a message can be changed instantly based on what the operator wants to communicate or sell. In their Day 3 Keynote at 21st Cloud Expo, Greg Chambers, Global Group Director, Digital Innovation, Coca-Cola, and Vidya Nagarajan, a Senior Product Manager at Google, discussed how from store operations and ...
"There's plenty of bandwidth out there but it's never in the right place. So what Cedexis does is uses data to work out the best pathways to get data from the origin to the person who wants to get it," explained Simon Jones, Evangelist and Head of Marketing at Cedexis, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
SYS-CON Events announced today that CrowdReviews.com has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5–7, 2018, at the Javits Center in New York City, NY. CrowdReviews.com is a transparent online platform for determining which products and services are the best based on the opinion of the crowd. The crowd consists of Internet users that have experienced products and services first-hand and have an interest in letting other potential buye...
SYS-CON Events announced today that Telecom Reseller has been named “Media Sponsor” of SYS-CON's 22nd International Cloud Expo, which will take place on June 5-7, 2018, at the Javits Center in New York, NY. Telecom Reseller reports on Unified Communications, UCaaS, BPaaS for enterprise and SMBs. They report extensively on both customer premises based solutions such as IP-PBX as well as cloud based and hosted platforms.