Click here to close now.

Welcome!

Linux Containers Authors: Elizabeth White, Carmen Gonzalez, Bart Copeland, Liz McMillan, Trevor Parsons

Blog Feed Post

How I built a monitor for RabbitMQ

When you are going to monitor your engine, you probably try first to find some tool that can do it. Very likely, of course, that tool should be able to handle monitoring online and to notify you when the health of your engine is starting to go bad. There are already several well-known and widespread online monitoring tools available for many systems. Super! But what if I try to find a suitable tool for my specific application and… ohh, failure – I cannot find what I need. Unfortunately, it’s also very likely that no one can even suggest a suitable tool. What can I do in such a situation? Probably try to do it myself. Who can help me? You’ve probably already guessed that I am talking about Monitis.  You may ask “why Monitis?”  Because Monitis suggests Monitis Open API, and that gives you a chance to build any monitoring tool yourself. In line with Monitis slang, such a monitor has been named the custom monitor.

But let’s cease the generic talk and get back to my story.

Recently, I had to use RabbitMQ server in one of my projects, and naturally I had a wish to monitor it; just to measure data that I want to monitor. RabbitMQ contains a nice plugin named RabbitMQ Management that in fact provides monitoring of RabbitMQ via any browser (thanks to the embedded WEBUI). Well, it is undoubtedly good, but I don’t want to sit whole days next to the monitor waiting for a problem to come in. I want to monitor online, to have the possibility to go back in time by viewing the monitoring history and, why not, to get a notification on my mobile while having a beer in the bar. I think every admin dreams of such a life.

Well, since I use an Ubuntu server I have decided to implement my custom monitor as Bash script to avoid any unnecessary dependencies and to take into account that the Bash script wrapper for Monitis API  is already implemented.

First of all I have to install RabbitMQ server. The easiest way to do this is to download the “deb” package from the original RabbitMQ site and install it by using the following command:

 

sudo dpkg -i rabbitmq-server_2.8.x_all.deb

 

So far so good. Next step – enabling the RabbitMQ Management HTTP API  that allows, in addition, getting necessary information by using REST technology. The management plugin has been included in the RabbitMQ distribution since version 2.8.1. To enable it, use the following command:

 

sudo rabbitmq-plugins enable rabbitmq_management

 

Please note that for older versions you have to install this plugin separately.

That’s all. Now I can use the RabbitMQ server by writing the following command to control RabbitMQ:

 

sudo /etc/init.d/rabbitmq-server {start|stop|status|rotate-logs|restart}

 

For instance, RabbitMQ server status will be shown as depicted below:

 

 

All is okay up to now. Well, after some investigation I have decided to measure the following available metrics:

  •  osd_pr – The percentage of open socket descriptors RabbitMQ server to the allowed maximum number of open sockets by process.
  •  ofd_pr – The percentage of open file descriptors RabbitMQ server to the allowed maximum number of open files by process.
  •  cpu_usage – the percentage of cpu usage by RabbitMQ server.
  •  mem_usage – the percentage of memory usage by RabbitMQ server.
  •  msg_in_queue – the number of messages that are still in the queue.
  •  timeout – queues timeout in seconds.
  •  pub_rate – Average value of total published messages into queues per second.
  •  from_client_rate – Total inbound throughput value estimated in Kbytes per second.
  •  to_client_rate – Total outbound throughput value estimated in Kbytes per second.
  •  get_rate – Average value of total got messages from queues per second.
  •  status – the evaluation of health status of RabbitMQ server (OK, IDLE, NOK, FAIL)

 

The health status of RabbitMQ should be evaluated as ‘NOK’ when at least one of the following events is detected:

  • The percentage of open file descriptors (ofd_pr) exceeds 90%
  • The percentage of open socket descriptors (osd_pr) exceeds 90%
  • The percentage of used Erlang processes to available Erlang processes exceeds 90%
  • The percentage of memory usage (mem_usage) exceeds 95%
  • The percentage of cpu usage (cpu_usage) exceeds 95%
  • There are messages in the queue (msg_in_queue > 0)

The health status ‘FAIL’ should be generated when RabbitMQ server is unavailable for some reason and the health status ‘IDLE’ should be generated when RabbitMQ server isn’t receiving any messages from clients.

It seems that is all I want for now. Okay, I developed quite quickly such a Bash Script for monitoring and got the following set of files:

monitis_api.sh         Monitis API wrapper implementation

monitis_util.sh        Utilities function set

monitis_global.sh      Monitis API wrapper global variables

monitis_constant.sh    Monitis API constants

rabbitmq_monitor.sh    RabbitMQ custom monitor implementation

monitor_constant.sh    RabbitMQ monitor constants

rmqmon_start.sh        Main executable script

ticktick.sh            Bash JSON parser

Note that I have really developed only the “rabbitmq_monitor.sh” script. The other scripts were simply adapted. Please also notice that I have to use the third party open source JSON parser (to allow processing JSON in bash script) because RabbitMQ Management HTTP API responses are in the JSON form.

 

Well, now it’s time for testing.

I have prepared two clients on JavaScript (Node.js) and Java for connecting to RabbitMQ. In addition, the load simulator was prepared in a way that is intended to generate quite a big load for processing.

So, I have run the monitor and simulator and after some time opened my dashboard in Monitis. The tests showed nice results which I saw in the Monitis dashboard:

 

Beside this, double-clicking on any line leads to an alternate view which shows additional data about the RabbitMQ state at that moment.

 

Eventually, you can also see a graphical representation of your data:

 

I built a rule for notification by using Monitis dashboard features and, satisfied, went to rest.

Perfect, let me summarize. I have obtained in a very short time the desired tool and moreover it can send me a notification any time of day about any troubling situation in my RabbitMQ engine.

Finally, I have uploaded the monitor I created into GitHub where you can find more details about it.

 

 

 

Share Now:del.icio.usDiggFacebookLinkedInBlinkListDZoneGoogle BookmarksRedditStumbleUponTwitterRSS

Read the original blog entry...

More Stories By Hovhannes Avoyan

Hovhannes Avoyan is the CEO of Monitis, Inc., a provider of on-demand systems management and monitoring software to 50,000 users spanning small businesses and Fortune 500 companies.

Prior to Monitis, he served as General Manager and Director of Development at prominent web portal Lycos Europe, where he grew the Lycos Armenia group from 30 people to over 200, making it the company's largest development center. Prior to Lycos, Avoyan was VP of Technology at Brience, Inc. (based in San Francisco and acquired by Syniverse), which delivered mobile internet content solutions to companies like Cisco, Ingram Micro, Washington Mutual, Wyndham Hotels , T-Mobile , and CNN. Prior to that, he served as the founder and CEO of CEDIT ltd., which was acquired by Brience. A 24 year veteran of the software industry, he also runs Sourcio cjsc, an IT consulting company and startup incubator specializing in web 2.0 products and open-source technologies.

Hovhannes is a senior lecturer at the American Univeristy of Armenia and has been a visiting lecturer at San Francisco State University. He is a graduate of Bertelsmann University.

@ThingsExpo Stories
The enterprise market will drive IoT device adoption over the next five years. In his session at @ThingsExpo, John Greenough, an analyst at BI Intelligence, division of Business Insider, analyzed how companies will adopt IoT products and the associated cost of adopting those products. John Greenough is the lead analyst covering the Internet of Things for BI Intelligence- Business Insider’s paid research service. Numerous IoT companies have cited his analysis of the IoT. Prior to joining BI Intelligence, he worked analyzing bank technology for Corporate Insight and The Clearing House Payment...
"ciqada is a combined platform of hardware modules and server products that lets people take their existing devices or new devices and lets them be accessible over the Internet for their users," noted Geoff Engelstein of ciqada, a division of Mars International, in this SYS-CON.tv interview at @ThingsExpo, held June 9-11, 2015, at the Javits Center in New York City.
SYS-CON Events announced today that Secure Infrastructure & Services will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Secure Infrastructure & Services (SIAS) is a managed services provider of cloud computing solutions for the IBM Power Systems market. The company helps mid-market firms built on IBM hardware platforms to deploy new levels of reliable and cost-effective computing and high availability solutions, leveraging the cloud and the benefits of Infrastructure-as-a-Service (IaaS...
SYS-CON Events announced today that ProfitBricks, the provider of painless cloud infrastructure, will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. ProfitBricks is the IaaS provider that offers a painless cloud experience for all IT users, with no learning curve. ProfitBricks boasts flexible cloud servers and networking, an integrated Data Center Designer tool for visual control over the cloud and the best price/performance value available. ProfitBricks was named one of the coolest Clo...
The 4th International Internet of @ThingsExpo, co-located with the 17th International Cloud Expo - to be held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA - announces that its Call for Papers is open. The Internet of Things (IoT) is the biggest idea since the creation of the Worldwide Web more than
"In the IoT space we are helping customers, mostly enterprises and industry verticals where time-to-value is critical, and we help them with the ability to do faster insights and actions using our platform so they can transform their business operations," explained Venkat Eswara, VP of Marketing at Vitria, in this SYS-CON.tv interview at @ThingsExpo, held June 9-11, 2015, at the Javits Center in New York City.
SYS-CON Events announced today that WHOA.com, an ISO 27001 Certified secure cloud computing company, participated as “Bronze Sponsor” of SYS-CON's 16th International Cloud Expo® New York, which took place June 9-11, 2015, at the Javits Center in New York City, NY. WHOA.com is a leader in next-generation, ISO 27001 Certified secure cloud solutions. WHOA.com offers a comprehensive portfolio of best-in-class cloud services for business including Infrastructure as a Service (IaaS), Secure Cloud Desktop, Cloud Storage, Disaster Recovery, Integrated Applications and Security.
SYS-CON Events announced today that Intelligent Systems Services will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Established in 1994, Intelligent Systems Services Inc. is located near Washington, DC, with representatives and partners nationwide. ISS’s well-established track record is based on the continuous pursuit of excellence in designing, implementing and supporting nationwide clients’ mission-critical systems. ISS has completed many successful projects in Healthcare, Commercial, Manu...
The Internet of Things is not only adding billions of sensors and billions of terabytes to the Internet. It is also forcing a fundamental change in the way we envision Information Technology. For the first time, more data is being created by devices at the edge of the Internet rather than from centralized systems. What does this mean for today's IT professional? In this Power Panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists addressed this very serious issue of profound change in the industry.
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 industry players in the world. The Internet of Things (IoT) is the most profound change in personal an...
SYS-CON Events announced today that kintone has been named “Bronze Sponsor” of SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. kintone promotes cloud-based workgroup productivity, transparency and profitability with a seamless collaboration space, build your own business application (BYOA) platform, and workflow automation system.
Discussions about cloud computing are evolving into discussions about enterprise IT in general. As enterprises increasingly migrate toward their own unique clouds, new issues such as the use of containers and microservices emerge to keep things interesting. In this Power Panel at 16th Cloud Expo, moderated by Conference Chair Roger Strukhoff, panelists addressed the state of cloud computing today, and what enterprise IT professionals need to know about how the latest topics and trends affect their organization.
SYS-CON Events announced today that SoftLayer, an IBM company, has been named “Gold Sponsor” of SYS-CON's 17th International Cloud Expo®, which will take place November 3–5, 2015 at the Santa Clara Convention Center in Santa Clara, CA. SoftLayer operates a global cloud infrastructure platform built for Internet scale. With a global footprint of data centers and network points of presence, SoftLayer provides infrastructure as a service to leading-edge customers ranging from Web startups to global enterprises. SoftLayer’s modular architecture, full-featured API, and sophisticated automation pro...
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 are using some form of XaaS – software, platform, and infrastructure as a service.
SYS-CON Events announced today that CommVault has been named “Bronze Sponsor” of SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. A singular vision – a belief in a better way to address current and future data management needs – guides CommVault in the development of Singular Information Management® solutions for high-performance data protection, universal availability and simplified management of data on complex storage networks. CommVault's exclusive single-platform architecture gives companies unp...
Buzzword alert: Microservices and IoT at a DevOps conference? What could possibly go wrong? In this Power Panel at DevOps Summit, moderated by Jason Bloomberg, the leading expert on architecting agility for the enterprise and president of Intellyx, panelists peeled away the buzz and discuss the important architectural principles behind implementing IoT solutions for the enterprise. As remote IoT devices and sensors become increasingly intelligent, they become part of our distributed cloud environment, and we must architect and code accordingly. At the very least, you'll have no problem fillin...
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 business opportunity. Submit your speaking proposal today!
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 world's largest enterprises – and delivering real results. Among the proven benefits, DevOps is corr...
Internet of Things (IoT) will be a hybrid ecosystem of diverse devices and sensors collaborating with operational and enterprise systems to create the next big application. In their session at @ThingsExpo, Bramh Gupta, founder and CEO of robomq.io, and Fred Yatzeck, principal architect leading product development at robomq.io, discussed how choosing the right middleware and integration strategy from the get-go will enable IoT solution developers to adapt and grow with the industry, while at the same time reduce Time to Market (TTM) by using plug and play capabilities offered by a robust IoT ...
Today air travel is a minefield of delays, hassles and customer disappointment. Airlines struggle to revitalize the experience. GE and M2Mi will demonstrate practical examples of how IoT solutions are helping airlines bring back personalization, reduce trip time and improve reliability. In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect with GE, and Dr. Sarah Cooper, M2Mi’s VP Business Development and Engineering, will explore the IoT cloud-based platform technologies driving this change including privacy controls, data transparency and integration of real time context wi...