Roughly three weeks later, Nagios started screaming in the routing team's internal chat room every five minutes, for days at a time. Some nodes in the cluster had their memory bubble up, and never gave it back to the OS. The nodes wouldn't crash as fast as before; instead, they'd grow close to the ulimit we'd set and hover there, taunting Nagios, and us by extension.
Clearly, I needed to do more work.
I Just Keep on Bleeding and I Won't Die
First Attempt …
For those familiar with Nagios, standard Sensu checks are compatible with Nagios checks. So if you know of a Nagios check that does what you need, you can stop right here and go grab that. Otherwise, let's continue.
The exit status of a Sensu check should be:
3 or more: unknown
A sensu check also outputs text describing the state to stdout or stderr.
Example outputs of check-ram.rb: Exit Status Output 0 CheckRAM OK: 65% free RAM …
The ( PMP) provide some free tools to make it easier to monitor PXC/Galera nodes. Monitoring broadly falls into two categories: alerting and historical graphing, and the plugins support Nagios and , respectively, for those purposes.
Percona Monitoring Plugins 1.0.5 for . The components are designed to integrate seamlessly with widely deployed solutions such as Nagios and , and are delivered in the form of templates, plugins, and scripts.is glad to announce the release of
* Added mysql-ca option to ss_get_mysql_stats.php (bug 1213857)
* Added user info to the idle_blocker_duration check of pmp-check-mysql-innodb (bug 1215317)
*pmp-check-mysql-processlist with more locking states (bug 1213859)
§ DevOps Borat :
Law offor devops: if thing can able go wrong, is mean is already wrong but you not have Nagios alert of it yet.
§ DownloadMoreRAM . Just downloaded 4GB of RAM to my iPhone, 10 , $ 0.
§ Sayings 2.0 :
Never judge an app by its icon
A watched status update never gets liked.
Close, but no WiFi.
Configure checks in Nagios, but configure a contact that drops the alerts
Read Nagios's state out of a file + parse it
Aggregate the checks by regex, and alert if a percentage is critical
It's a godsend for people who manage large Nagios instances, but it starts falling down if you've got multiple independent Nagios instances (shards) that are checking the same thing.
You still end up with a situation where each of your shards alert if the shared entity they're …
We have a lot of data to parse through at . Our internal stats application, , does the majority of heavy data lifting for us, including reports, application health, CI builds, and much more. Our Campfire bot named Tally happily pings us when a build fails, deploys are fired off, and when Nagios alerts pop up.
I had a problem though: I needed to have all of this data open constantly to absorb it. Either I had to look at the pages on Dash…
And yet, how many of you are still using Nagios?
There are great advances in monitoring at the moment, and I enjoying watching them as someone who greatly benefits from them.
Yet, I'm worried that all these advances still don't focus enough on the single thing that's supposed to use them: humans.
There's lots of work going on to solve problems to make monitoring technology more accessible, yet I feel like we haven't solved the first problem at hand: to make monitoring …
…existing levels. This is an artefact of an industry wide cargo culting of the alerting levels from Nagios, and these levels may not make sense in a modern monitoring pipeline with distinctly compartmentalised stages.
For example, the Nagios plugin development guidelines state that UNKNOWN from a check can mean:
Invalid command line arguments were supplied to the plugin
Low-level failures internal to the plugin (such as unable to fork, or open a tcp socket) that prevent it from …
…Tasseo is another one of them, a successful experiment of having an at-a-glance dashboard with the most important metrics in one convenient overview.
It'll still be a while until we see the ancient tools like Nagios, Icinga and others improve, but the competition is ramping up. Sensu is one open source alternative to keep an eye on.
I'm looking forward to seeing how the monitoring space evolves over the next two years.