troyfontaine

Content-Type: multipart/mixed; boundary="===============0035287898381899620=="
MIME-Version: 1.0
 
--===============0035287898381899620==
Content-Type: text/cloud-config; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename="cloud-config.txt"
#cloud-config

troyfontaine

Troubleshooting HAProxy

Step 1: Verify that HAProxy is running

On ubuntu, run the following command:

sudo service haproxy status

You should see output like below if it is running:

haproxy is running.

troyfontaine

#!/bin/bash

# Install pre-requisites
apt-get install software-properties-common

# Add PPAs
apt-add-repository ppa:brightbox/ruby-ng -y
apt-add-repository ppa:ansible/ansible -y

# Run update

troyfontaine

MySQL RDS Cheat Sheet

1. Install the Command Line Client

On Ubuntu

sudo apt-get install mysql-client

2. Use the command-line client to connect

The below command will connect to the rds server specified after -h and open a MySQL client connection that you can run commands against.

troyfontaine

# !/bin/bash
# Script to use Fleetctl to stop and start containers using a rolling restart
# By Troy Fontaine with rolling restart script from http://engineering.rainchasers.com/coreos/fleet/2015/03/03/rolling-unit-restart.html

# Grab list of containers and assign to array
container_list=($(fleetctl list-units -fields=unit -no-legend | cut -f2 ))

# Prepare variable for later use
container=""

troyfontaine

Steps to install

1. Install pre-requisite packages

   sudo apt update
   sudo apt install -y gcc make ruby-build
   

2. Install rbenv

troyfontaine

List of OS Families used by ansible_os_family

"Container Linux by CoreOS" = Container Linux "Debian" = Debian, Raspbian, Ubuntu

Get facts about a host

ansible myserver -m setup | less

troyfontaine

How to add an image to a gist

1. Create a gist if you haven't already.
2. Clone your gist:

   # make sure to replace `<hash>` with your gist's hash
   git clone https://gist.github.com/<hash>.git # with https
   git clone git@gist.github.com:<hash>.git     # or with ssh

troyfontaine

Cloudflare

DNSSEC with Route 53

"257-KSK" as a "Flag" and "13 - ECDSA Curve P-256 with SHA-256" as an algorithm.

AWS ELBs

troyfontaine

Troubleshooting Ethernet on Ubuntu

Here are some commands to help troubleshoot network card issues on Ubuntu:

Find Connection State

Determine Speed and Duplex

dmesg |grep eth0