cron.weekly issue #81: Nginx, Badger, fsql, zetcd, MySQL, Docker, binsnitch & more

May 21, 2017

Welcome to another issue of cron.weekly, for Sunday, May 21st, 2017.

This turned out to be a shorter issue than usual, and I can’t put my finger on why. I might’ve missed a lot of the news or it’s just been quiet a week. 🙂

Either way, if you think I missed any projects or if you’d like to plug your own blogpost related to Linux, send me an e-mail!

News#

Taking Zero-Downtime Load Balancing even Further #

The team at Yelp describes how they built their load balancing stack, using Nginx at the TLS layer and HAProxy for the bulk of the load balancing. Some good details are shared regarding Unix socket sharing & TCP listeners.

Sudo Satirical #

This is ‘The Onion’, but for Linux. This site offers you a satirical look at the world of Linux & open source!

CentOS 7.4 to ship with TLS 1.2 + ALPN #

Good news for anyone trying to serve HTTP/2 traffic on a RHEL or CentOS machine: the new RHEL/CentOS 7.4, due to be released somewhere in Q3 this year, will add support for ALPN in OpenSSL. Without ALPN, HTTP/2 will not work on clients using the Chrome browser.

Tools & Projects#

Datadog: all your infrastructure, in one place #

Track & alert on the health and performance of every server, container, and app in any environment, with Datadog. Sign up for a free 14-day trial . (Sponsored)

HackerTarget: Online Vulnerability Scanners #

Your favourite Open Source Vulnerability Scanners hosted online for remote security testing. With HackerTarget, perform once off scans or schedule jobs to alert on changes to Internet facing systems. Signup now for immediate access . (Sponsored)

nginx-module-sysguard #

This module allows you to throttle HTTP(s) requests when system load goes too high, average time per request exceeds a certain treshold, …

beetbox #

Beetbox is essentially a pre-provisioned version of Drupal VM mainly to speed up initial virtual machine build time, but also to reduce the size of each VM by leveraging linked clones.

badger #

A new key/value data store, built in Go. It claims to be 3.5x faster than RocksDB.

RocksDB #

While reading up on badger, I realised I hadn’t heard of “RocksDB” yet: also a key/value data store, built on top of Google technology and released by the Facebook engineering team.

fsql #

Search through your filesystem with SQL-esque queries. Reminded me about osquery , that allows you to query your entire infrastructure through SQL.

zetcd #

zetcd is a proxy that can accept ZooKeeper requests and deliver them to an etcd cluster. If you’re thinking of replacing ZooKeeper, this looks like a good tool to help you move to etcd.

Guides & Tutorials#

Estimating CPU Per Query With Weighted Linear Regression #

It’s sometimes impossible to answer what’s consuming resources like CPU, IO, & memory in a complex software such as a database. This ebook explains how a specialization of ordinary linear regression answers seemingly unsolvable database questions. (Sponsored)