Docker HTTP Proxy and DNS Configuration Cheat Sheet (now includes automatic HTTP Proxy detection)


This blog post provides a little cheat sheet on running a Linux host with or without a Docker client behind HTTP proxies. For Ubuntu and similar Linux distributions, we will also show how to detect the proxy available and adapt the proxy settings accordingly. This comes handy, if you are a road warrior that often … More Docker HTTP Proxy and DNS Configuration Cheat Sheet (now includes automatic HTTP Proxy detection)

AWS Automation Part 4: Using Terraform for AWS Automation


This is part 4 of a blog post series, in which we explore how to automate Amazon Web Services (AWS) using the Terraform open source software by HashiCorp. Similar to Cloudify, Terraform is a versatile way to codify any type of infrastructure and to spin up a production-like demo or staging environment on any IaaS cloud like AWS, Azure … More AWS Automation Part 4: Using Terraform for AWS Automation

IT Automation Part IV: Ansible Tower “Hello World” Example


This is part IV of a little “Hello World” example for Ansible, an IT automation (DevOps) tool. This time, we will get acquainted with Ansible Tower, a web front end for Ansible. The post has following content: Quickest way of “installing” an Ansible Tower trial system (via Vagrant this time) Step by step guide for a minimalistic “Hello World!” example, following … More IT Automation Part IV: Ansible Tower “Hello World” Example

AWS Automation based on Vagrant — Part 3: Creating a Docker Host on AWS in 10 Minutes using Vagrant


Learn how Vagrant can be used to perform more sophisticated provisioning tasks than creation and termination of virtual machines. From our local Vagrant console, we will install Docker host Software and we will verify the results by downloading and testing the Python Docker image. … More AWS Automation based on Vagrant — Part 3: Creating a Docker Host on AWS in 10 Minutes using Vagrant

AWS Automation based on Vagrant — Part 1: Getting started with AWS


In this blog post series we will explore, how to automate Amazon Web Services (AWS) by using Vagrant. The series is divided into three parts. Readers that are interested in the automation part only can skip part 1 (the AWS EC2 console part) and jump directly to part 2, since both, part 1 and part 2 are self-contained. … More AWS Automation based on Vagrant — Part 1: Getting started with AWS

AWS Automation based on Vagrant — Part 2: Installation and Usage of the Vagrant AWS Plugin


Learn how to get started with Amazon Web Services EC2 and how to automate simple task like creation and termination of virtual machine instances using Vagrant. This is a first step towards more sophisticated automation tasks like SW installation and shell script execution. … More AWS Automation based on Vagrant — Part 2: Installation and Usage of the Vagrant AWS Plugin

Automating Network Provisioning with Cisco APIC — Exploring the REST API


How to automate the configuration of network devices? Cisco APIC-EM (= Application Policy Infrastructure Controller) is a controller that can help us with that task. In this blog post, we will explore its modern REST API for accomplishing basic tasks like creating, reading, updating and deleting (CRUD) objects like APIC users (e.g. administrators) network discovery tasks network devices and their configurations. We … More Automating Network Provisioning with Cisco APIC — Exploring the REST API

IT Automation Part III: Saltstack “Hello World” Example


This blog post will explore basic capabilities of Salt by going through a hands-on “hello world” IT automation example. Moreover, those basic capabilities are compared for Salt vs. Ansible. This post is (almost) self-contained, and there is no need to read part I and part II of this series first. Salt is a quite recent IT automation tool (project started in … More IT Automation Part III: Saltstack “Hello World” Example

IT Automation Part II: Ansible “Hello World” for Templating


This post is a continuation of my previous  post, where we have gone through a little “Hello World” example using Ansible, an IT automation tool. Last time we had performed SSH remote shell commands. This time, we will go though a little templating use case, where a shell script and a data file are created from Jinja2 templates, … More IT Automation Part II: Ansible “Hello World” for Templating