Jonathan Day-Reiner

Zero to HA MariaDB and Docker Swarm in under 15 minutes on IBM Softlayer (or anywhere, really)
Part Two

Tue, 05 Apr 2016 03:45:00 -0400

In part one of this series, we looked at getting a MariaDB cluster up and running on top of a multi-master docker swarm with Consul running on the swarm itself – in under 15 minutes. The accompanying github repository includes several helper scripts geared towards getting the environment up and running rapidly in IBM Softlayer. In this second part of the series, we’ll drill-down and take a closer look at the process itself for those who use...

Zero to HA MariaDB and Docker Swarm in under 15 minutes on IBM Softlayer (or anywhere, really)
Part One

Wed, 30 Mar 2016 16:00:00 -0400

Photo By: Håkan Dahlström

Part one of a two-part series. Part two, which dives into (much) deeper detail about the process is available here.

While I manage environments across multiple cloud platforms (and even the occasional “traditional” colo) at my workplace, our primary application environment is in IBM Softlayer. I enjoy working with Softlayer – the API is fairly robust, there’s a lot of choice (even bare-metal, should that tickle your fancy) and it allows me to deploy instances...

Monitoring MariaDB Galera cluster members with Citrix Netscaler

Sun, 06 Mar 2016 17:10:13 -0500

At my workplace, we run several MariaDB Galera clusters for various client sites and use Citrix Netscaler Application Delivery Controllers to load-balance various services (among other features). With near-synchronous multimaster replication, Galera cluster simplifies application stacks as in many cases you can point each web server at its own corresponding database server and just worry about balancing the load between your application servers.

Citrix netscaler also supports load-balancing across MySQL systems, for instances where you want to spread out reads across systems or want to balance reads and send writes to a specific system.

But what happens...

Sending Bash and ZSH Commands to Syslog

Sun, 21 Feb 2016 17:07:13 -0500

Your bash/zsh history is great if its complete, but it doesn’t capture commands across all users, sudo’s, root commands etc. In particular with test environments, someone may perform a “one-off” procedure and then months later it needs to be repeated. It would be nice to be able to look up what the user did at the time, and searching through multiple, possibly truncated history files is a pain.

Tools like typescript are great if you’re actively documenting, but not something you would use all the time in practice and capture more than just a history of your commands. There...

Docker 1.10.0rc3 with Compose, Machine and Xhyve on OSX

Wed, 03 Feb 2016 16:58:23 -0500

The steps below will uninstall docker, docker-machine and docker-compose under OSX using virtualbox (via either brew or toolbox, or both), and replace them with the latest RC versions of docker, compose and machine using the Xhyve driver for better performance under OSX using Hypervisor.framework.

If you don’t have homebrew already, install it

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

make sure old docker versions are removed

Remove toolbox via its uninstaller if you have it:

sudo sh -c 

Icinga2 check_wmi_plus Example
Thu, 11 Jun 2015 17:56:01 -0400
An example check_wmi_plus configuration for Icinga2. Check_wmi_plus is a clientless plugin for monitoring Windows systems via WMI with Nagios and other monitoring platforms.
 object CheckCommand "check_wmi" { import "plugin-check-command" command = [ PluginDir + "/check_wmi_plus.pl" ] arguments = { "--inidir" = "$wmi_inidir$" "-H" = "$host.name$" "-A" = "$wmi_authfile_path$" "-m" = "$check_mode$" "-s" = "$wmi_submode$" "-a" = "$wmi_arg1