Click here to close now.

Welcome!

Microservices Journal Authors: Liz McMillan, David Sprott, Lori MacVittie, Carmen Gonzalez, Elizabeth White

Related Topics: OpenStack Journal, Microservices Journal, Open Source, Web 2.0, Cloud Expo, Security, SDN Journal

OpenStack Journal: Article

Overview of the OpenStack Cloud

Distilling terminology and acronyms that define OpenStack

Overview
OpenStack is an Infrastructure as a Service offering. (see my prior post for an explanation of IaaS).

OpenStack is an OpenSource project, founded by RackSpace, NASA and others.

OpenStack can be deployed as a public or private cloud.

The OpenStack projects are: CINDER, GLANCE, KEYSTONE, NOVA, QUANTUM, SWIFT.

OpenStack Compute: (NOVA)
Project NOVA, or OpenStack Compute, provisions and manages on-demand virtual machines and associated resources: CPU, Memory, Disk and Network.

Virtual machines can be started, stopped, suspended, created and deleted, while network options for a virtual machine are static, DHCP, or IPv6.

The virtual machines run on hypervisors such as XEN or KVM, but others are supported too - even VMware ESXi!

Users and administrators use the GUI to request virtual machines, while developers may typically use an API.

Security? Of course there are security groups, similar to AWS, to control access to virtual machines and RBAC to govern user access by role and project.

Storage
Object Storage (project SWIFT)

Object Storage is a distributed storage system for static data such as files (graphics, movies) and virtual machine images. Objects and files are written to multiple disk drives, while OpenStack is responsible for ensuring data replication and integrity. Storage scales horizontally by adding new servers.  If a server or hard drive fails, OpenStack replicates its content from other active servers to new servers in the cluster. Since OpenStack uses software to ensure data replication and distribution across servers, inexpensive servers can be used rather than expensive storage hardware.

Block storage (project CINDER)
Block storage is essentially volumes used by OpenStack virtual machines. Snapshots back up data stored on block storage volumes. Snapshots can be restored or used to create a new block storage volume.

Network (project QUANTUM)
OpenStack provides networking models to accomodate different applications or users. Standard network models include flat networks or VLANs to separate servers and network traffic. OpenStack Networking manages IP addresses, to allocate static  or DHCP addresses. Floating IP addresses allow traffic to be dynamically rerouted to any compute resource,  for example to redirect traffic during maintenance or in the case of a failure. OpenStack Networking has an extension framework to add intrusion detection systems (IDS), load balancing, firewalls and virtual private networks (VPN) .

Shared Services
Identity services (project KEYSTONE)
OpenStack Identity provides a central repository of users mapped to the OpenStack services they can access. OpenStack identity is a common authentication system and integrates with existing backend directory services such as LDAP. It supports several forms of authentication including username and password, tokens and AWS-type logins. The identity service also provides a queryable list of services deployed in the OpenStack cloud and users can programmatically determine their level of access.
OpenStack.

OpenStack Administrators can:

  • Configure centralized policies across users and systems
  • Create users and tenants and define permissions for compute, storage and networking resources using role-based access control (RBAC)
  • Integrate with an existing directory like LDAP, allowing for a single source of identity authentication across the cloud.

Image services (Project GLANCE)

The OpenStack Image Service provides discovery, registration and delivery services for disk and server images. Saved images can be used as a template to get new virtual servers up and running (especially useful for multiple servers of the same type and configuration). It can also be used to store and catalog an umlimited number of backups.

The image service stores private and public images in a variety of formats:

  • AMI
  • qcow2 (Qemu/KVM)
  • OVF (Open Virtualization Format)
  • RAW
  • VDI (VirtualBox)
  • VHD (Hyper-V)
  • VMDK (VMWare)

Image below courtesy of OpenStack.org

More Stories By Jonathan Gershater

Jonathan Gershater has lived and worked in Silicon Valley since 1996, primarily doing system and sales engineering specializing in: Web Applications, Identity and Security. At Red Hat, he provides Technical Marketing for Virtualization and Cloud. Prior to joining Red Hat, Jonathan worked at 3Com, Entrust (by acquisition) two startups, Sun Microsystems and Trend Micro.

(The views expressed in this blog are entirely mine and do not represent my employer - Jonathan).

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@MicroservicesExpo Stories
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...
For those of us that have been practicing SOA for over a decade, it's surprising that there's so much interest in microservices. In fairness microservices don't look like the vendor play that was early SOA in the early noughties. But experienced SOA practitioners everywhere will be wondering if microservices is actually a good thing. You see microservices is basically an SOA pattern that inherits all the well-known SOA principles and adds characteristics that address the use of SOA for distribut...
Microservices are the result of decomposing applications. That may sound a lot like SOA, but SOA was based on an object-oriented (noun) premise; that is, services were built around an object - like a customer - with all the necessary operations (functions) that go along with it. SOA was also founded on a variety of standards (most of them coming out of OASIS) like SOAP, WSDL, XML and UDDI. Microservices have no standards (at least none deriving from a standards body or organization) and can be b...
17th Cloud Expo, taking place Nov 3-5, 2015, 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 enterprises a...
In today's digital world, change is the one constant. Disruptive innovations like cloud, mobility, social media, and the Internet of Things have reshaped the market and set new standards in customer expectations. To remain competitive, businesses must tap the potential of emerging technologies and markets through the rapid release of new products and services. However, the rigid and siloed structures of traditional IT platforms and processes are slowing them down – resulting in lengthy delivery ...
In today's application economy, enterprise organizations realize that it's their applications that are the heart and soul of their business. If their application users have a bad experience, their revenue and reputation are at stake. In his session at 15th Cloud Expo, Anand Akela, Senior Director of Product Marketing for Application Performance Management at CA Technologies, discussed how a user-centric Application Performance Management solution can help inspire your users with every applicati...
It's 2:15pm on a Friday, and I'm sitting in the keynote hall at PyCon 2013 fidgeting through a succession of lightning talks that have very little relevance to my life. Topics like "Python code coverage techniques" (ho-hum) and "Controlling Christmas lights with Python” (yawn - I wonder if there's anything new on Hacker News)...when Solomon Hykes takes the stage, unveils Docker, and the world shifts. If you haven't seen it yet, you should watch the video of Solomon's Pycon The Future of Linux C...
The truth is, today’s databases are anything but agile – they are effectively static repositories that are cumbersome to work with, difficult to change, and cannot keep pace with application demands. Performance suffers as a result, and it takes far longer than it should to deliver new features and capabilities needed to make your organization competitive. As your application and business needs change, data repositories and structures get outmoded rapidly, resulting in increased work for applica...
Enthusiasm for the Internet of Things has reached an all-time high. In 2013 alone, venture capitalists spent more than $1 billion dollars investing in the IoT space. With "smart" appliances and devices, IoT covers wearable smart devices, cloud services to hardware companies. Nest, a Google company, detects temperatures inside homes and automatically adjusts it by tracking its user's habit. These technologies are quickly developing and with it come challenges such as bridging infrastructure gaps,...
NuoDB just introduced the Swifts 2.1 Release. In this demo at 15th Cloud Expo, Seth Proctor, CTO of NuoDB, Inc., discussed why scaling databases in the cloud is challenging, why building your application on top of the infrastructure that is designed with this in mind makes a difference, and what you can do with NuoDB that simplifies your programming model, your operations model.
You use an agile process; your goal is to make your organization more agile. But what about your data infrastructure? The truth is, today's databases are anything but agile - they are effectively static repositories that are cumbersome to work with, difficult to change, and cannot keep pace with application demands. Performance suffers as a result, and it takes far longer than it should to deliver new features and capabilities needed to make your organization competitive. As your application an...
The 17th International Cloud Expo has announced that its Call for Papers is open. 17th International Cloud Expo, to be held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, APM, APIs, Microservices, Security, Big Data, Internet of Things, DevOps and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding bu...
As enterprises engage with Big Data technologies to develop applications needed to meet operational demands, new computation fabrics are continually being introduced. To leverage these new innovations, organizations are sacrificing market opportunities to gain expertise in learning new systems. In his session at Big Data Expo, Supreet Oberoi, Vice President of Field Engineering at Concurrent, Inc., discussed how to leverage existing infrastructure and investments and future-proof them against e...
Once the decision has been made to move part or all of a workload to the cloud, a methodology for selecting that workload needs to be established. How do you move to the cloud? What does the discovery, assessment and planning look like? What workloads make sense? Which cloud model makes sense for each workload? What are the considerations for how to select the right cloud model? And how does that fit in with the overall IT transformation?
Cloud Expo New York is happening from June 9 - 11. This event brings together the worlds of Cloud Computing, DevOps, IoT, WebRTC, Big Data and SDDC. We hope to see you there-members of the Blue Box team will exhibit in booth 218 next to the DevOps area. Plus, our Chief Product Officer, Hernan Alvarez, will present his talk "The Cloud Has a Down-and-Dirty Lining" as part of the Operations track in the DevOps Summit portion of the event on June 9 at 11 am. Learn more about his session her...
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! Internet of @ThingsExpo, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 17th Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading in...
When OpenStack aficionados gather in Vancouver in a couple of weeks, one of the hot topics will be containers, a “new” alternative to virtualization. Actually, container technology has been around for a couple of decades, but it is trending among the IT community at a fever pitch these days and stands to have a huge impact on the future of cloud computing.The appeal of container technology is easy to appreciate. In a nutshell, containers can enable you to run many more applications on the same h...
Docker is an open platform for developers and sysadmins of distributed applications that enables them to build, ship, and run any app anywhere. Docker allows applications to run on any platform irrespective of what tools were used to build it making it easy to distribute, test, and run software. I found this 5 Minute Docker video, which is very helpful when you want to get a quick and digestible overview. If you want to learn more, you can go to Docker’s web page and start with this Docker intro...
The 5th International DevOps Summit, co-located with 17th International Cloud Expo – being held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA – announces that its Call for Papers is open. Born out of proven success in agile development, cloud computing, and process automation, DevOps is a macro trend you cannot afford to miss. From showcase success stories from early adopters and web-scale businesses, DevOps is expanding to organizations of all sizes, including the...
Over the years, a variety of methodologies have emerged in order to overcome the challenges related to project constraints. The successful use of each methodology seems highly context-dependent. However, communication seems to be the common denominator of the many challenges that project management methodologies intend to resolve. In this respect, Information and Communication Technologies (ICTs) can be viewed as powerful tools for managing projects. Few research papers have focused on the way...