Always reinventing the wheel doesn’t pay off most of the time, so telling Salt what to do by creating Salt States again and again to install application components isn’t really efficient. Instead Salt Formulas brings convention and a bit of magic, and offer reusable bundles which package altogether all the necessary piece to automate a specific task, like deploying etcd, a distributed key value store cluster, which we will take as an example in this article. ...
The amazing world of configuration management software is really well populated these days. You may already have looked at Puppet, Chef or Ansible but that’s not all of it, today we focus on SaltStack. Simplicity is at its core without any compromise on speed or scalability. Some users have up to 10.000 minions or more. Salt remote execution is built on top of an event bus which makes Salt unique. ...
Kargo (a.k.a Kubespray) is an initiative to deploy a Kubernetes cluster using Ansible. It will contrast with our previous Step by Step article by showing that we can deploy a cluster with a single command, a bit like the newly integrated SwarmKit feature announced in Docker 1.12 docker swarm init. Introduction As you’ve seen in our Step by Step article, deploying a Kubernetes cluster manually is a long, error prone and tedious process. This exercice was just meant as a learning exercice, to understand the different moving parts and how everything fits together. ...
Tectonic from CoreOS is an enterprise-grade Kubernetes solution which simplifies management operation of a k8s environment by leveraging CoreOS, fleet, Rkt and Flannel. In this article we’ll manually build a cluster of three CoreOS nodes on top of VMware Fusion to see how all of this fits together. Introduction Kubernetes is already available, ready to consume as a Service from Google, Platform9 where you’ll quickly be up and running. They are also some automation tooling, like Ansible Playbooks, SaltStack or bootKube, specifically built to rapidly deploy a cluster with all the required components. ...
For years Google is driving its infrastructure using containers with a system named Borg, they are now sharing their expertise with an Open Source container cluster manager named Kubernetes (or helmsmen in ancient greek) abreviated k8s. Briefly said Kubernetes is a framework for building distributed systems. Release 1.0 went public in July 2015 and Google created at the same time, in partnership with the Linux Foundation, the Cloud Native Computing Foundation (CNCF). ...
Software Defined Networking (SDN) is often qualified as immature and tagged as complicated. Amongst the many solution available on the market, some of them can do a tremendous job of decoupling physical networking from logical networks used by cloud consumers. It then empower end users to deploy whatever architecture they need on their own. So deploying OpenStack without making sure to tackle the networking requirements of your team could be a recipe for failure. ...
In the Enterprise world, user authenticates over an Lightweight Directory Access Protocol (LDAP) most of the time. Openstack Keystone, the identity service, integrates natively with LDAP directories for authentication and authorization services. The configuration of Keystone can be automated using Mirantis LDAP Fuel Plugin. This article is a step by step guide to integrate Keystone to OpenLDAP but any other LDAP directory including Active Directory could do a perfect job too. Keystone domains The Fuel LDAP Plugin is using the concept of Keystone Domains and put domain specific configuration in ...
In large datacenters it’s common for each rack to live in its own broadcast domain. Fuel allows to deploy nodes on different networks by leveraging its Node Groups functionnality. In this article we’ll details the required steps to make this possible using Mirantis OpenStack 7.0 and we’ll also review Node Groups support improvements coming in MOS 8.0. Terminology In such a large scale architecture, its often required to associate each rack with its own list of logical networks. So we can leverage the Node Groups functionnality of Fuel to create as much network declaration as we require for the following logical networks: ...