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Jean-Philippe Clapot

Kubernetes : two different OCI runtimes

By | DevOps, Kubernetes | No Comments

Quick recap : in the previous episode, we have seen how to move from a Kubernetes cluster powered by Docker into a future-proof Kubernetes cluster, using containerd.Β Now let’s move on and fully enjoy the power of having this CRI intermediate layer sitting below the kubelet. containerd and OCI runtimes containerd is a high level container runtime. It is CRI compliant, CRI being the API from Kubernetes for container runtimes. Here below a good picture of…

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Mehdi Bada

Deploy a Kubernetes cluster using Ansible in AWS

By | Ansible, AWS, DevOps, Docker, Kubernetes | No Comments

After more than 2 years of experience in Kubernetes cluster administration, I am deeply convinced that one of the most important things to have as an ops guy is a sandbox cluster at your disposal. This can be either a sleeping cluster or a new fresh installation with all your standards replicated on it to perform your series of tests. In this blog post, we consider that you have an AWS account with limited credits,…

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Open source Team

Reduce the complexity: be sharing and open source

By | Cloud, DevOps | No Comments

By Franck Pachot . I thought that my last post on this blog was the previous one but I blog when it comes to my mind – nothing planned. And two things got me to write this. First, last week we got our 20th dbi xChange where we meet with colleagues. And I love discussing with colleagues about what we see, and foresee, in our jobs. The second one is: https://twitter.com/FranckPachot/status/1409084362637942786?s=20 The web.archive.org is full…

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Karsten Lenz

Rancher installation on RHEL 8 compatible Linux

By | Docker, Kubernetes | No Comments

This Blog is about the installation of Rancher Community on a RHEL 8 compatible Linux, for this Blog i choose AlmaLinux 8.4, but i will also work on Rocky Linux 8.4 Release Candidate. Base is an AlmaLinux / Rocky Linux minimal installation on a VMWare Host for all nodes, using the same configuration with 4vCPU and 4GB RAM. A small comaprsion of RHEL 8 and the alternatives can be found in my other blog her:…

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Open source Team

K8s on Windows/VirtualBox

By | Kubernetes, Postgres | No Comments

By Franck Pachot . This is a little demo, easy to copy-paste, if you want to play with Kubernetes on your laptop. And, not a simple “Hello World” but a real database running here, able to scale up and down with full availability. Install Virtualbox I use Oracle VirtuaBox because I’m a big fan of Oracle products, especially when they are good and free. However, you can use Hyper-V (then just skip this paragraph and…

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Daniel Westermann

Getting started with the Zalando Operator for PostgreSQL

By | Database Administration & Monitoring | No Comments

In the previous posts (Rancher, up and running, on EC2 – 1 – One node, Rancher, up and running, on EC2 – 2 – Three nodes, Rancher, up and running, on EC2 – 3 – Rancher setup, Rancher on SLES 15 as a demo environment, and Deploying a Kubernetes cluster on EC2 with Rancher) it was all about deploying a Kubernetes cluster and getting Rancher up and running. In this post we’ll use one of…

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Daniel Westermann

Deploying a Kubernetes cluster on EC2 with Rancher

By | AWS, Cloud, DevOps, Docker, Kubernetes | 2 Comments

Once Rancher is up and running, it makes the deployment and management of Kubernetes clusters quite easy. In this post we’ll deploy a brand new cluster on top of EC2. If you want to have a simple and quick Rancher playground you can follow this post, which will give you a Rancher setup on SLES 15. If you want to have a more production like Rancher setup, you can follow these posts: Rancher, up and…

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Daniel Westermann

Rancher on SLES 15 as a demo environment

By | Database Administration & Monitoring, DevOps, Docker, Kubernetes | No Comments

If you followed the last posts (Rancher, up and running, on EC2 – 1 – One node, Rancher, up and running, on EC2 – 2 – Three nodes and Rancher, up and running, on EC2 – 3 – Rancher setup) about Rancher, you know how to setup Rancher in a highly available RKE cluster. While this is the way to go for a production clusters, you might want to play with Rancher on a local…

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Daniel Westermann

Rancher, up and running, on EC2 – 2 – Three nodes

By | AWS, Database Administration & Monitoring, Docker, Kubernetes | No Comments

In the last post we’ve brought up a RKE Kubernetes cluster on a single node. While that is cool for demonstration purposes or testing, this is nothing for a real life setup. Running the control pane, the etcd nodes and the worker nodes all on one node, is nothing you want to do usually, as you can not guarantee fault tolerance with such a setup. To make the RKE cluster highly available we’ll be adding…

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