"It is a small tool allowing to enter into namespaces. Technically, it can enter existing namespaces, or spawn a process into a new set of namespaces. "What are those namespaces you're blabbering about?" We are talking about container namespaces.
nsenter can do many useful things, but the main reason why I'm so excited about it is because it lets you enter into a Docker container."
"PHP cache slam defense using (memcached) semaphore to prevent dogpile effect (aka clobbering updates, stampending herd or Slashdot effect).
Problem: too many requests hit your website at the same time to regenerate same content slamming your database. It might happen after the cache was expired.
Solution: first request generates new content while all the subsequent requests get (stale) content from cache until it's refreshed by the first request."
"Flocker is a data volume manager and multi-host Docker cluster management tool. With it you can control your data using the same tools you use for your stateless applications. This means that you can run your databases, queues and key-value stores in Docker and move them around as easily as the rest of your app.
With Flocker's command line tools and a simple configuration language, you can deploy your Docker-based applications onto one or more hosts. Once deployed, your applications will have access to the volumes you have configured for them. Those volumes will follow your containers when you use Flocker to move them between different hosts in your Flocker cluster."
"Maid keeps files from sitting around too long, untouched. Many of the downloads and temporary files you collect can easily be categorized and handled appropriately by rules you define. Let the maid in your computer take care of the easy stuff, so you can spend more of your time on what matters.
Think of it like the email filters you might already have, but for files. Worried about things happening that you don't expect? Maid doesn't overwrite files and actions are logged so you can tell what happened.
Maid is inspired by the Mac OS X shareware program Hazel. Think of Maid as "Hazel for hackers".
Your rules are defined in Ruby, so simple rules are easy and difficult rules are possible. This also makes Maid a great general-purpose advanced file renaming tool."
"reclass is an “external node classifier” (ENC) as can be used with automation tools, such as Puppet, Salt, and Ansible. It is also a stand-alone tool for merging data sources recursively.
The purpose of an ENC is to allow a system administrator to maintain an inventory of nodes to be managed, completely separately from the configuration of the automation tool. Usually, the external node classifier completely replaces the tool-specific inventory (such as site.pp for Puppet, ext_pillar/master_tops for Salt, or /etc/ansible/hosts).
With respect to the configuration management tool, the ENC then fulfills two jobs:
it provides information about groups of nodes and group memberships it gives access to node-specific information, such as variables reclass allows you to define your nodes through class inheritance, while always able to override details further up the tree (i.e. in more specific nodes). Think of classes as feature sets, as commonalities between nodes, or as tags. Add to that the ability to nest classes (multiple inheritance is allowed, well-defined, and encouraged), and you can assemble your infrastructure from smaller bits, eliminating duplication and exposing all important parameters to a single location, logically organised. And if that isn’t enough, reclass lets you reference other parameters in the very hierarchy you are currently assembling."
"Give it a JSON or JS seed file and it will serve it through REST routes.
Created with
"Stop your copy & paste routine. Pull data from incoming e-mails and automate your workflow within minutes."
"Screentime is a small tool that helps you start thinking of your website traffic in terms of time instead of hits (pageviews, visits, etc). You can define areas of the page, called Fields, and then Screentime will keep track of how much time each Field is on screen for. You can also use it to track smaller elements, like ad units. Screentime only handles the client side work. You'll need to provide your own backend to post the data to. I've included an example that shows how to this with Keen IO using only a few lines of code. There's also a built-in option for posting to Google Analytics but there are some caveats (see below)."
"Scroll Depth is a small Google Analytics plugin that allows you to measure how far down the page your users are scrolling. It monitors the 25%, 50%, 75%, and 100% scroll points, sending a Google Analytics Event at each one.
You can also track when specific elements on the page are scrolled into view. On a blog, for example, you could send a Scroll Depth event whenever the user reaches the end of a post."
"Google Analytics does a lot of things really well but the way it measures visit duration—by calculating the time difference between subsequent pageviews—provides only a partial view of how much time is actually spent on site.
Riveted helps fix this by measuring the amount of time users are actively engaged (e.g., clicking, scrolling, using the keyboard) and then reporting the data to Google Analytics in frequent intervals.
It supports Universal Analytics, Classic Google Analytics, and Google Tag Manager. It can also be used with any analytics tool that supports events, e.g. Mixpanel or Keen.io."
"String extraction, translation and export tools for the 21st century. "Moving strings around so you don't have to" "
"Use gandi to create and manage domains, certificates, hosting instances, servers and more!"
"grunt-perfbudget is a Grunt.js task for enforcing a performance budget (more on performance budgets). It uses the wonderful webpagetest.org and the WebPagetest API Wrapper for NodeJS created by Marcel Duran.
grunt-perfbudget uses either a public or private instance of WebPagetest to perform tests on a specified URL. It compares test results to budgets you specify. If the budget is met, the tasks successfully completes. If it the page exceeds your performance budgets, the task fails and informs you why."
"A new, transactionally updated Ubuntu for clouds and devices.
Snappy Ubuntu Core is a new rendition of Ubuntu with transactional updates - a minimal server image with the same libraries as today’s Ubuntu, but applications are provided through a simpler mechanism. The snappy approach is faster, more reliable, and lets us provide stronger security guarantees for apps and users — that’s why we call them “snappy” applications."
Maintenability Index Cyclomatic complexity Halstead's metrics Lack of cohesion of methods Abstraction/Instability … and more!
