Eclipse Authors: Yeshim Deniz, Liz McMillan, Elizabeth White, XebiaLabs Blog, Ken Fogel

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 PicsArt, Inc.,

@ThingsExpo Stories
The Internet of Things (IoT), in all its myriad manifestations, has great potential. Much of that potential comes from the evolving data management and analytic (DMA) technologies and processes that allow us to gain insight from all of the IoT data that can be generated and gathered. This potential may never be met as those data sets are tied to specific industry verticals and single markets, with no clear way to use IoT data and sensor analytics to fulfill the hype being given the IoT today.
SYS-CON Events announced today that Hitrons Solutions will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Hitrons Solutions Inc. is distributor in the North American market for unique products and services of small and medium-size businesses, including cloud services and solutions, SEO marketing platforms, and mobile applications.
OnProcess Technology has announced it will be a featured speaker at @ThingsExpo, taking place November 1 - 3, 2016, in Santa Clara, California. Dan Gettens, OnProcess’ Chief Analytics Officer, will discuss how Internet of Things (IoT) data can be leveraged to predict product failures, improve uptime and slash costly inventory stock. @ThingsExpo is an annual gathering of IoT and cloud developers, practitioners and thought-leaders who exchange ideas and insights on topics ranging from Big Data in...
Intelligent machines are here. Robots, self-driving cars, drones, bots and many IoT devices are becoming smarter with Machine Learning. In her session at @ThingsExpo, Sudha Jamthe, CEO of IoTDisruptions.com, will discuss the next wave of business disruption at the junction of IoT and AI, impacting many industries and set to change our lives, work and world as we know it.
SYS-CON Events announced today that Enzu will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Enzu’s mission is to be the leading provider of enterprise cloud solutions worldwide. Enzu enables online businesses to use its IT infrastructure to their competitive advantage. By offering a suite of proven hosting and management services, Enzu wants companies to focus on the core of their online busine...
The explosion of new web/cloud/IoT-based applications and the data they generate are transforming our world right before our eyes. In this rush to adopt these new technologies, organizations are often ignoring fundamental questions concerning who owns the data and failing to ask for permission to conduct invasive surveillance of their customers. Organizations that are not transparent about how their systems gather data telemetry without offering shared data ownership risk product rejection, regu...
The Open Connectivity Foundation (OCF), sponsor of the IoTivity open source project, and AllSeen Alliance, which provides the AllJoyn® open source IoT framework, today announced that the two organizations’ boards have approved a merger under the OCF name and bylaws. This merger will advance interoperability between connected devices from both groups, enabling the full operating potential of IoT and representing a significant step towards a connected ecosystem.
November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Penta Security is a leading vendor for data security solutions, including its encryption solution, D’Amo. By using FPE technology, D’Amo allows for the implementation of encryption technology to sensitive data fields without modification to schema in the database environment. With businesses having their data become increasingly more complicated in their mission-critical applications (such as ERP, CRM, HRM), continued ...
SYS-CON Events announced today that Embotics, the cloud automation company, will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Embotics is the cloud automation company for IT organizations and service providers that need to improve provisioning or enable self-service capabilities. With a relentless focus on delivering a premier user experience and unmatched customer support, Embotics is the fas...
SYS-CON Events announced today that Cloudbric, a leading website security provider, will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Cloudbric is an elite full service website protection solution specifically designed for IT novices, entrepreneurs, and small and medium businesses. First launched in 2015, Cloudbric is based on the enterprise level Web Application Firewall by Penta Security Sys...
Smart Cities are here to stay, but for their promise to be delivered, the data they produce must not be put in new siloes. In his session at @ThingsExpo, Mathias Herberts, Co-founder and CTO of Cityzen Data, will deep dive into best practices that will ensure a successful smart city journey.
Data is the fuel that drives the machine learning algorithmic engines and ultimately provides the business value. In his session at Cloud Expo, Ed Featherston, a director and senior enterprise architect at Collaborative Consulting, will discuss the key considerations around quality, volume, timeliness, and pedigree that must be dealt with in order to properly fuel that engine.
SYS-CON Events announced today that MathFreeOn will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. MathFreeOn is Software as a Service (SaaS) used in Engineering and Math education. Write scripts and solve math problems online. MathFreeOn provides online courses for beginners or amateurs who have difficulties in writing scripts. In accordance with various mathematical topics, there are more tha...
Successful digital transformation requires new organizational competencies and capabilities. Research tells us that the biggest impediment to successful transformation is human; consequently, the biggest enabler is a properly skilled and empowered workforce. In the digital age, new individual and collective competencies are required. In his session at 19th Cloud Expo, Bob Newhouse, CEO and founder of Agilitiv, will draw together recent research and lessons learned from emerging and established ...
The best way to leverage your Cloud Expo presence as a sponsor and exhibitor is to plan your news announcements around our events. The press covering Cloud Expo and @ThingsExpo will have access to these releases and will amplify your news announcements. More than two dozen Cloud companies either set deals at our shows or have announced their mergers and acquisitions at Cloud Expo. Product announcements during our show provide your company with the most reach through our targeted audiences.
In his general session at 19th Cloud Expo, Manish Dixit, VP of Product and Engineering at Dice, will discuss how Dice leverages data insights and tools to help both tech professionals and recruiters better understand how skills relate to each other and which skills are in high demand using interactive visualizations and salary indicator tools to maximize earning potential. Manish Dixit is VP of Product and Engineering at Dice. As the leader of the Product, Engineering and Data Sciences team a...
Virgil consists of an open-source encryption library, which implements Cryptographic Message Syntax (CMS) and Elliptic Curve Integrated Encryption Scheme (ECIES) (including RSA schema), a Key Management API, and a cloud-based Key Management Service (Virgil Keys). The Virgil Keys Service consists of a public key service and a private key escrow service. 

@ThingsExpo has been named the Top 5 Most Influential Internet of Things Brand by Onalytica in the ‘The Internet of Things Landscape 2015: Top 100 Individuals and Brands.' Onalytica analyzed Twitter conversations around the #IoT debate to uncover the most influential brands and individuals driving the conversation. Onalytica captured data from 56,224 users. The PageRank based methodology they use to extract influencers on a particular topic (tweets mentioning #InternetofThings or #IoT in this ...
More and more brands have jumped on the IoT bandwagon. We have an excess of wearables – activity trackers, smartwatches, smart glasses and sneakers, and more that track seemingly endless datapoints. However, most consumers have no idea what “IoT” means. Creating more wearables that track data shouldn't be the aim of brands; delivering meaningful, tangible relevance to their users should be. We're in a period in which the IoT pendulum is still swinging. Initially, it swung toward "smart for smar...
Web Real-Time Communication APIs have quickly revolutionized what browsers are capable of. In addition to video and audio streams, we can now bi-directionally send arbitrary data over WebRTC's PeerConnection Data Channels. With the advent of Progressive Web Apps and new hardware APIs such as WebBluetooh and WebUSB, we can finally enable users to stitch together the Internet of Things directly from their browsers while communicating privately and securely in a decentralized way.