I’m managing applications inside Kubernetes for more than 2 years for MySocialApp a social news feed solution and recently Referlab, an impressive referral marketing solution. If you follow me, you certainly know that I’ve made multiple Helm charts on distributed technologies like: Cassandra Helm chart Elasticsearch Helm chart Traefik Helm chart After several years of experience on it, you can trust me when I say managing statefulset on Kubernetes is not the easiest thing to do.

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Since several years, I’m hosting a lot of things: blog, wiki, emails etc… I’ve played with Vserver, OpenVZ, KVM and finaly LXC. For years, I’ve learned how to use all of them but the most known solution during the last years is Docker. I even can remeber the first Meetup I’ve attended in Paris talking about Docker 5 years ago. Now containers are eveverywhere. I recently changed the server I’m running for my own usage and this was the good timing to switch from LXC to Docker.

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I’m using Kubernetes on an on premise cluster for MySocialApp. Today, I’m storing MySocialApp public images at Quay.io and I also wanted to store private images. I didn’t want to bootstrap a private registry for it to avoid maintaining it, having a distributed storage to maintain for it etc…but wanted a solution at a lower cost. I started to look at DockerHub and Quay.io. As far aas I saw, DockerHub do not provide private registry while Quay does.

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The Jeedom software is open source; you have complete access to the software that manages your home automation. Jeedom is compatible with various protocols, like Z-Wave, RFXCOM, RTS SOMFY, EnOcean, xPL, etc. Installing Jeedom on Synology with Docker it not a complex task. However for those who are not familiar with those technologies, I summarized here the installation process for a Z-wave network. First of all, let’s look at the requirements:

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Some of you may not be familiar with the terms “Rolling upgrade” or “Rolling restart". This is the action of upgrading or restarting a cluster without service interruption (alias zero downtime). In most cases, this is done node by node, but in fact it depends of the technology you’re managing and the number of active nodes in your cluster. At Nousmotards we have several Java Spring Boot applications running. Restarting one application can take up to 1 min.

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Packer is one of the tools I’ve used in the past to build VirtualBox boxes. You can find what I’ve done on my GitHub account. For Smash project, I wanted to make a packer configuration to manage Docker and VirtualBox. I also wanted to call Ansible to build specific images for each needs. The goal is to be able to build cloud image ready to start, without any special dependencies. This because I need different usages:

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In the last post, I talked about how to manage Docker and VirtualBox with Vagrant. This post follows the last one, with the integration of Ansible as a provisioner. Once again, I’m using it for the Smash project. With Ansible, I made several “group_vars” files containing custom and common information related to the used environment (dev, uat, staging…). This helps to setup different kind of environment easily. Vagrant will help to build images with Ansible deployed inside.

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