troyfontaine

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#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=""

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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

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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

troyfontaine

Based on the work by wjordan in this comment

The solution is to force the update of RubyGems to side step the issue.

gem update --force --system 2.6.11

Then the error does not occur.