tech

Docker Compose I use Traefik as my reverse proxy. Here is a snippet of my Docker Compose file for Mastodon: ###################### # Mastodon # ###################### mastodon-db: image: postgres:14-alpine container_name: mastodon-db shm_size: 256mb environment: - UID=${PUID} - GID=${PGID} - TZ=${TZ} - POSTGRES_HOST_AUTH_METHOD=trust volumes: - /root/docker/appdata/mastodon/dbdata:/var/lib/postgresql/data labels: - "com.centurylinklabs.watchtower.enable=true" restart: unless-stopped mastodon-redis: image: redis:7-alpine container_name: mastodon-redis environment: - UID=${PUID} - GID=${PGID} - TZ=${TZ} volumes: - /root/docker/appdata/mastodon/redis:/data labels: - "com.centurylinklabs.watchtower.enable=true" restart: unless-stopped mastodon-web: image: tootsuite/mastodon container_name: mastodon-web command: bash -c "rm -f /mastodon/tmp/pids/server.

I had an article published on the Netflix Tech Blog. Applying Netflix DevOps Patterns to Windows

Update: This docker image is now available on the Docker Hub as linuturk/mono-choco. Do you want to create Chocolatey packages but don’t want to run a Windows server? Use this Dockerfile to build Chocolatey and do your package development without a Windows system. FROM mono:3.12.1 MAINTAINER Justin Phelps RUN apt-get update && apt-get install -y wget unzip WORKDIR /usr/local/src/choco RUN wget https://github.com/chocolatey/choco/archive/stable.zip RUN unzip stable.zip RUN rm stable.zip WORKDIR /usr/local/src/choco/choco-stable RUN chmod +x build.

A common problem with building multiple servers in the cloud is an intermittent failure in one build that can stop your entire deployment process. With the right retry logic you can avoid this problem with Ansible. I’m using until to check the output from the rax module. Using the length Jinja2 filter, I can check if the correct number of instances have been created. This should retry the task 3 times with a delay of 5 seconds between attempts.

There are many variations and combinations of AWS products and services that lend the platform to great flexibility and customization. We work hard to evaluate these combinations and put forth a collection of best practices for our customers to follow. One of these best practices is the use of CloudFormation templates. My team maintains a series of standard CloudFormation templates for our customers to use. Part of that maintenance includes updating those templates and testing them for functionality.

My ISP is less than reliable so I decided to automate my modem restarts. I’m using a Motorola SB6141 and I can access a web based interface at 192.168.100.1. Using a combination of curl, grep, and sed, I was able to scrape the necessary pages to get information about the modem’s status. The script then checks the status and restarts the modem if it detects a fault. The script uses curl to GET a specific URL with the necessary parameters.

In this third installment of my No Hassle Blog Automation series, I remove the necessity for running any infrastructure of my own. Drone has been replaced with a hosted solution at CircleCI. Their support is amazing, and their circle.yml format made configuration easy. Take a look at the first and second installments of this series. Requirements There are a few requirements for this setup: Rackspace Cloud Account Cloud Files Container* Existing Pelican Blog GitHub Account * This container should be configured to serve a static site.

Due to the difficulty in maintaining a full Jenkins instance, I have revisited the blog automation issue and have replaced Jenkins with Drone. Making use of a tool like Drone greatly simplifies the setup process and lowers the barrier of entry for this type of project. Requirements There are a few requirements for this setup: Rackspace Cloud Account Existing Pelican Blog GitHub Account Linux Administration Knowledge You should also read my original article.

Deploying Ansible Tower isn’t hard, but automating a server build and triggering the installation lowers the barrier of entry for trying out Tower. This article will describe the HEAT Template I’ve created to automate this process. Anatomy of a HEAT Template Templates are broken into several main sections. I’m going to describe each one of them so you fully understand the process. Follow along here: Ansible Tower HEAT Template Description and Version It is important that the Version information you specify matches the HEAT version in use.

Installing Installing inventory plugins isn’t intuitive, and the documentation available on this process isn’t immediately clear. The instructions found on this page Ansible Documentation can be adapted for the Rackspace plugin. It boils down to this for the Rackspace plugin: Grab the latest version of rax.py from the plugins/inventory folder on GitHub. Raw GitHub Link Place this file on your Ansible master. The location doesn’t matter that much, but convention says to put it in /etc/ansible/rax.

These instructions should be a nice and easy start to deploying Rackspace Cloud servers using the salt-cloud tool. Just follow along exactly, and at the end you should have a fully functional salt-cloud deployment tool. Dependencies I’m performing my installation on a Debian 7 (Wheezy) server, where my salt-master already exists. The following two commands should install salt-cloud, and all the necessary dependencies. This assumes you are already using the Python tool pip.

This article is in response to a request by Ryan Jung. Request your own article. One of the disadvantages of using IRC over another chat medium is the lack of logging while you aren’t connected to the server. In this article, I will describe the process I used to implement logging for my favorite IRC channels. The Environment Pierc is my choice of logging bot for this article. It logs the contents of IRC channels to a MySQL instance, and presents an easy to use web interface.

This article is in response to a request by Shawn Laasch and Jordan Rinke. Request your topic today! This article will focus on Rackspace Cloud Load Balancers. Cloud Load Balancers Load balancing is performed by a device or service acting as a single endpoint to your application or site. This device then spreads the requests it receives across multiple back end nodes. There are benefits to using a load balancer in your configuration:

Following proper coding standards is important to ensure others can read and modify your code. I make use of the following tools when writing Python to ensure I am formatting my code properly. Install Dependencies Let’s start by installing a dependency of the Vim plugin we are going to use. The Flake8 module will be needed for our vim-flake8 setup. As root (or using sudo), run the following commands: easy_install pip pip install flake8 The first command installs the latest version of pip, a tool for installing and managing Python packages.

My initial draft of the cf_pyrax.py script used in my automation deleted all the contents of a Cloud Files container, and then re-uploaded this content. This process was inefficient and also caused issues loading the site while this process was running. I have now updated this script to use the new sync_folder_to_container method from pyrax. This method was introduced to pyrax in this commit. Make sure you update your pyrax modules before using this new script.

When using yum-cron, you might want to receive email notifications when updates are applied. Here is how you enable these notifications for CentOS. This article assumes a properly configured mail service. Installing yum-cron Install yum-cron using the yum package manager: yum install yum-cron Configure yum-cron Modify the /etc/sysconfig/yum-cron file and add your email address to the MAILTO line. MAILTO=email@address.com Be sure to read up on the other settings in this file.

Managing a blog can be a hassle. Operating system updates, blog software updates, and server security take up tons of time. Don’t forget about scaling your blog if you get popular. Inspired by the Rackspace DevOps post on their new blog format, I’ve setup my own version using Pelican instead of Octopress. Resources This tutorial will assume you have two systems to manage your blog. Local Workstation Remote Server The local workstation will be used to manage your blog posts, as well as uploading the content.

The Battle for Wesnoth is a turn based strategy game that has unique and fun campaigns and great multiplayer maps. Playing on the official server is fun, but sometimes you’ll want a private server on which you and your close friends can play. Installing the Server Software Most popular Linux distributions have the wesnoth-server package available in their repositories. For this example, I’ll be installing this service on a machine running Fedora 17.

Strong passwords are important, today more than ever. Clever passwords like “Password123”, “hunter2”, and just the letter “a” just won’t cut it anymore. How can someone create strong passwords, use a different one for every account they have, and still remember them all? KeePassX is the answer. KeePassX KeePassX is a password database. It allows you to create an encrypted database file to hold all of your passwords. You unlock this database with a single master password.

Everyone has a collection of documents and pictures that are important to them. Don’t make the mistake of not backing up these files. I keep all of my music, pictures, and important files in Dropbox. You receive 2 GB of storage free (plus a small bump of free space if you use my referral link.) Once you install Dropbox and choose your folder location, make sure you put all of your important files in the Dropbox Folder.

IRC stands for Internet Relay Chat. Here is the first paragraph from the Wikipedia article on IRC: Internet Relay Chat (IRC) is a protocol for real-time Internet text messaging (chat) or synchronous conferencing. It is mainly designed for group communication in discussion forums, called channels, but also allows one-to-one communication via private message as well as chat and data transfer, including file sharing. Connecting to an IRC server isn’t hard. You just need the right IRC client, and a little bit of information.