|By Hovhannes Avoyan||
|August 9, 2012 07:00 AM EDT||
As systems administrators, application logs are often the key to our success, but also our biggest hassle. They provide clues to what’s going on when things go awry, and in those situations more detail is generally better. But when you don’t actually know something is wrong, and just want to get a sense for whether things are normal, more detail can create so much noise that it’s all but impossible to glean any useful information.
In those situations, you’d rather just have statistical information about what’s in your logs. In this article, I present a simple and easy solution to turn your logs into useful graphs, in real time. If you ever need to measure the volume of your logs, or perhaps graph the frequency of certain log events, then read on.
The solution I present uses four key tools:
- Log4J (though plain log files would fit as well)
With so many moving parts, you might be tempted to think this could be an overcomplicated solution. But in fact — as in the long tradition of Unix command line tools — it is a composition of simple tools each doing one job very well. As with files piped from one Unix command to another, these four components act as a pipeline for log events, with each piece adding value to the stream along the way.
All of the log events in this article start inside of Log4J. If you run Java applications, then this provides an easy way to hook into your logs, to peel off an event stream that you want to see graphed in Monitis. But, Log4J could easily be replaced in this solution with plain log files, syslog, or any number of other logging frameworks.
The key modification that we make to Log4J is to add a SocketAppender that sends a copy of selected Loggers to our logstash server.
The role of logstash in the pipeline is twofold. First, it listens for connections from Java application servers, accepting streams of logs when they connect. Second, it filters, modifies, and routes those streams to the appropriate outputs. In this case, we’ll be handling all of the incoming streams by notifying StatsD each time a log event is received, without actually sending the content of each event.
Logstash will be receiving log events very frequently, but Monitis only wants to receive updates at most once per minute. To resolve this mismatch, StatsD acts as our log stream bean counter, allowing logstash to send increment messages each time an event is received. StatsD records these in counters for each type of log message, and then sends the counts on to Monitis every 60 seconds.
Finally, we get to the end of the pipeline, and Monitis receives the count messages. These are added to the appropriate custom monitors, which are automatically created if they don’t already exist. Once the data is in Monitis, it can be graphed in the Web UI, or used to send alerts when a rate of log events is outside of a user-specified threshold.
The gory details
Now that you’ve seen the overview, let’s take a look at the configuration details that make it happen. Don’t worry, since each component in the pipeline is doing a simple job, there’s really not much to it.
Install and configure the software
Let’s look at installation details for the tools in each step in the pipeline. I’m assuming that you already have Java applications using Log4J. If not, modifying the pipeline to read from log files, receive from syslog, or other options is pretty straightforward, but outside the scope of this article. For that, refer to the logstash documentation on how to set up other kinds of logstash inputs.
You have great SaaS business app ideas. You want to turn your idea quickly into a functional and engaging proof of concept. You need to be able to modify it to meet customers' needs, and you need to deliver a complete and secure SaaS application. How could you achieve all the above and yet avoid unforeseen IT requirements that add unnecessary cost and complexity? You also want your app to be responsive in any device at any time. In his session at 19th Cloud Expo, Mark Allen, General Manager of...
Jan. 18, 2017 07:30 PM EST Reads: 3,136
WebRTC is bringing significant change to the communications landscape that will bridge the worlds of web and telephony, making the Internet the new standard for communications. Cloud9 took the road less traveled and used WebRTC to create a downloadable enterprise-grade communications platform that is changing the communication dynamic in the financial sector. In his session at @ThingsExpo, Leo Papadopoulos, CTO of Cloud9, discussed the importance of WebRTC and how it enables companies to focus o...
Jan. 18, 2017 06:15 PM EST Reads: 4,186
Big Data engines are powering a lot of service businesses right now. Data is collected from users from wearable technologies, web behaviors, purchase behavior as well as several arbitrary data points we’d never think of. The demand for faster and bigger engines to crunch and serve up the data to services is growing exponentially. You see a LOT of correlation between “Cloud” and “Big Data” but on Big Data and “Hybrid,” where hybrid hosting is the sanest approach to the Big Data Infrastructure pro...
Jan. 18, 2017 05:30 PM EST Reads: 4,867
In his General Session at 16th Cloud Expo, David Shacochis, host of The Hybrid IT Files podcast and Vice President at CenturyLink, investigated three key trends of the “gigabit economy" though the story of a Fortune 500 communications company in transformation. Narrating how multi-modal hybrid IT, service automation, and agile delivery all intersect, he will cover the role of storytelling and empathy in achieving strategic alignment between the enterprise and its information technology.
Jan. 18, 2017 04:45 PM EST Reads: 4,578
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 enviro...
Jan. 18, 2017 04:30 PM EST Reads: 4,758
With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo 2016 in New York. 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 June 6-8, 2017, at the Javits Center in New York City, New York, is co-located with 20th Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry p...
Jan. 18, 2017 03:30 PM EST Reads: 3,682
"LinearHub provides smart video conferencing, which is the Roundee service, and we archive all the video conferences and we also provide the transcript," stated Sunghyuk Kim, CEO of LinearHub, in this SYS-CON.tv interview at @ThingsExpo, held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA.
Jan. 18, 2017 02:45 PM EST Reads: 1,591
Things are changing so quickly in IoT that it would take a wizard to predict which ecosystem will gain the most traction. In order for IoT to reach its potential, smart devices must be able to work together. Today, there are a slew of interoperability standards being promoted by big names to make this happen: HomeKit, Brillo and Alljoyn. In his session at @ThingsExpo, Adam Justice, vice president and general manager of Grid Connect, will review what happens when smart devices don’t work togethe...
Jan. 18, 2017 02:00 PM EST Reads: 402
"There's a growing demand from users for things to be faster. When you think about all the transactions or interactions users will have with your product and everything that is between those transactions and interactions - what drives us at Catchpoint Systems is the idea to measure that and to analyze it," explained Leo Vasiliou, Director of Web Performance Engineering at Catchpoint Systems, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York Ci...
Jan. 18, 2017 01:00 PM EST Reads: 5,604
The 20th International Cloud Expo has announced that its Call for Papers is open. Cloud Expo, to be held June 6-8, 2017, at the Javits Center in New York City, brings together Cloud Computing, Big Data, Internet of Things, DevOps, Containers, Microservices 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 ...
Jan. 18, 2017 01:00 PM EST Reads: 5,102
Discover top technologies and tools all under one roof at April 24–28, 2017, at the Westin San Diego in San Diego, CA. Explore the Mobile Dev + Test and IoT Dev + Test Expo and enjoy all of these unique opportunities: The latest solutions, technologies, and tools in mobile or IoT software development and testing. Meet one-on-one with representatives from some of today's most innovative organizations
Jan. 18, 2017 12:15 PM EST Reads: 1,542
20th Cloud Expo, taking place June 6-8, 2017, at the Javits Center in New York City, NY, 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.
Jan. 18, 2017 12:00 PM EST Reads: 4,231
SYS-CON Events announced today that Super Micro Computer, Inc., a global leader in Embedded and IoT solutions, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 7-9, 2017, at the Javits Center in New York City, NY. Supermicro (NASDAQ: SMCI), the leading innovator in high-performance, high-efficiency server technology, is a premier provider of advanced server Building Block Solutions® for Data Center, Cloud Computing, Enterprise IT, Hadoop/Big Data, HPC and E...
Jan. 18, 2017 12:00 PM EST Reads: 5,763
SYS-CON Events announced today that Linux Academy, the foremost online Linux and cloud training platform and community, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. Linux Academy was founded on the belief that providing high-quality, in-depth training should be available at an affordable price. Industry leaders in quality training, provided services, and student certification passes, its goal is to c...
Jan. 18, 2017 12:00 PM EST Reads: 1,950
WebRTC is the future of browser-to-browser communications, and continues to make inroads into the traditional, difficult, plug-in web communications world. The 6th WebRTC Summit continues our tradition of delivering the latest and greatest presentations within the world of WebRTC. Topics include voice calling, video chat, P2P file sharing, and use cases that have already leveraged the power and convenience of WebRTC.
Jan. 18, 2017 10:30 AM EST Reads: 3,109
"Matrix is an ambitious open standard and implementation that's set up to break down the fragmentation problems that exist in IP messaging and VoIP communication," explained John Woolf, Technical Evangelist at Matrix, in this SYS-CON.tv interview at @ThingsExpo, held Nov 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA.
Jan. 18, 2017 09:45 AM EST Reads: 11,558
WebRTC sits at the intersection between VoIP and the Web. As such, it poses some interesting challenges for those developing services on top of it, but also for those who need to test and monitor these services. In his session at WebRTC Summit, Tsahi Levent-Levi, co-founder of testRTC, reviewed the various challenges posed by WebRTC when it comes to testing and monitoring and on ways to overcome them.
Jan. 18, 2017 08:15 AM EST Reads: 5,984
"A lot of times people will come to us and have a very diverse set of requirements or very customized need and we'll help them to implement it in a fashion that you can't just buy off of the shelf," explained Nick Rose, CTO of Enzu, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Jan. 18, 2017 07:45 AM EST Reads: 4,641
DevOps is being widely accepted (if not fully adopted) as essential in enterprise IT. But as Enterprise DevOps gains maturity, expands scope, and increases velocity, the need for data-driven decisions across teams becomes more acute. DevOps teams in any modern business must wrangle the ‘digital exhaust’ from the delivery toolchain, "pervasive" and "cognitive" computing, APIs and services, mobile devices and applications, the Internet of Things, and now even blockchain. In this power panel at @...
Jan. 18, 2017 06:45 AM EST Reads: 2,774
Every successful software product evolves from an idea to an enterprise system. Notably, the same way is passed by the product owner's company. In his session at 20th Cloud Expo, Oleg Lola, CEO of MobiDev, will provide a generalized overview of the evolution of a software product, the product owner, the needs that arise at various stages of this process, and the value brought by a software development partner to the product owner as a response to these needs.
Jan. 18, 2017 06:30 AM EST Reads: 1,190