Click here to close now.

Welcome!

Release Management Authors: Liz McMillan, Lori MacVittie, Gilad Parann-Nissany, Carmen Gonzalez, Mark R. Hinkle

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 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 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 20 years ago.
The WebRTC Meetup, where WebRTC enthusiasts exchange ideas, is being held on Wednesday, June 10, from 7 pm – 9 pm at the 4th WebRTC Summit, June 9-11, 2015, at the Javits Center in New York City, NY. The WebRTC Meetup is being hosted by the New York WebRTC Developer Group. WebRTC is the future of browser-to-browser communications, and continues to make inroads into the traditional, difficult, plug-in web communications world. The 4th WebRTC Summit continues our tradition of delivering the latest and greatest presentations within the world of WebRTC. Topics include voice calling, video chat, ...
Imagine a world where targeting, attribution, and analytics are just as intrinsic to the physical world as they currently are to display advertising. Advances in technologies and changes in consumer behavior have opened the door to a whole new category of personalized marketing experience based on direct interactions with products. The products themselves now have a voice. What will they say? Who will control it? And what does it take for brands to win in this new world? In his session at @ThingsExpo, Zack Bennett, Vice President of Customer Success at EVRYTHNG, will answer these questions a...
SYS-CON Events announced today that BMC 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. BMC delivers software solutions that help IT transform digital enterprises for the ultimate competitive business advantage. BMC has worked with thousands of leading companies to create and deliver powerful IT management services. From mainframe to cloud to mobile, BMC pairs high-speed digital innovation with robust IT industrialization – allowing customers to provide amazing user experiences with optimized IT per...
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.
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 MetraTech, now part of Ericsson, has been named “Silver Sponsor” of SYS-CON's 16th International Cloud Expo®, which will take place on June 9–11, 2015, at the Javits Center in New York, NY. Ericsson is the driving force behind the Networked Society- a world leader in communications infrastructure, software and services. Some 40% of the world’s mobile traffic runs through networks Ericsson has supplied, serving more than 2.5 billion subscribers.
2015 predictions circa 1970: houses anticipate our needs and adapt, city infrastructure is citizen and situation aware, office buildings identify and preprocess you. Today smart buildings have no such collective conscience, no shared set of fundamental services to identify, predict and synchronize around us. LiveSpace and M2Mi are changing that. LiveSpace Smart Environment devices deliver over the M2Mi IoT Platform real time presence, awareness and intent analytics as a service to local connected devices. In her session at @ThingsExpo, Sarah Cooper, VP Business of Development at M2Mi, will d...
"For over 25 years we have been working with a lot of enterprise customers and we have seen how companies create applications. And now that we have moved to cloud computing, mobile, social and the Internet of Things, we see that the market needs a new way of creating applications," stated Jesse Shiah, CEO, President and Co-Founder of AgilePoint Inc., in this SYS-CON.tv interview at 15th Cloud Expo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
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 will addresses this very serious issue of profound change in the industry.
Health care systems across the globe are under enormous strain, as facilities reach capacity and costs continue to rise. M2M and the Internet of Things have the potential to transform the industry through connected health solutions that can make care more efficient while reducing costs. In fact, Vodafone's annual M2M Barometer Report forecasts M2M applications rising to 57 percent in health care and life sciences by 2016. Lively is one of Vodafone's health care partners, whose solutions enable older adults to live independent lives while staying connected to loved ones. M2M will continue to gr...
The world is at a tipping point where the technology, the device and global adoption are converging to such a point that we will see an explosion of a world where smartphone devices not only allow us to talk to each other, but allow for communication between everything – serving as a central hub from which we control our world – MediaTek is at the heart of both driving this and allowing the markets to drive this reality forward themselves. The next wave of consumer gadgets is here – smart, connected, and small. If your ambitions are big, so are ours. In his session at @ThingsExpo, Jack Hu, D...
The multi-trillion economic opportunity around the "Internet of Things" (IoT) is emerging as the hottest topic for investors in 2015. As we connect the physical world with information technology, data from actions, processes and the environment can increase sales, improve efficiencies, automate daily activities and minimize risk. In his session at @ThingsExpo, Ed Maguire, Senior Analyst at CLSA Americas, will describe what is new and different about IoT, explore financial, technological and real-world impact across consumer and business use cases. Why now? Significant corporate and venture...
"At our booth we are showing how to provide trust in the Internet of Things. Trust is where everything starts to become secure and trustworthy. Now with the scaling of the Internet of Things it becomes an interesting question – I've heard numbers from 200 billion devices next year up to a trillion in the next 10 to 15 years," explained Johannes Lintzen, Vice President of Sales at Utimaco, in this SYS-CON.tv interview at @ThingsExpo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
Aria Systems, which helps enterprises grow recurring revenue, today announced that its co-founder and inventor of cloud billing Brendan O'Brien, will be a featured speaker at the Cloud Expo, June 9-11 at The Javits Center in New York. Aria also will be demonstrating its Active Monetization platform in Booth #424 on the Expo Floor. O'Brien will lead the following sessions: June 9 - 11:00 am - 11:35 am, Room 1A16 with participants from Constant Contact, MGI Research and ATG Enabling Complex Recurring Revenue Strategies – With IoT exploding, massive data will transform businesses with oppor...
Growth hacking is common for startups to make unheard-of progress in building their business. Career Hacks can help Geek Girls and those who support them (yes, that's you too, Dad!) to excel in this typically male-dominated world. Get ready to learn the facts: Is there a bias against women in the tech / developer communities? Why are women 50% of the workforce, but hold only 24% of the STEM or IT positions? Some beginnings of what to do about it!
SYS-CON Events announced today that the "First Containers & Microservices Conference" will take place June 9-11, 2015, at the Javits Center in New York City. The “Second Containers & Microservices Conference” will take place November 3-5, 2015, at Santa Clara Convention Center, Santa Clara, CA. Containers and microservices have become topics of intense interest throughout the cloud developer and enterprise IT communities.
"There is a natural synchronization between the business models, the IoT is there to support ,” explained Brendan O'Brien, Co-founder and Chief Architect of Aria Systems, in this SYS-CON.tv interview at the 15th International Cloud Expo®, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
The basic integration architecture, as defined by ESBs, hasn’t changed for more than a decade. Most cloud integration providers still rely on an ESB architecture and their proprietary connectors. As a result, enterprise integration projects suffer from constraints of availability and reliability of these connectors that are not re-usable across other integration vendors. However, the rapid adoption of APIs and almost ubiquitous availability of APIs amongst most SaaS and Cloud applications are rapidly redefining traditional integration approaches and their reliance on proprietary connectors. ...