Running stateful workloads on Kubernetes: cluster setup, database operators such as those for PostgreSQL, Helm, storage, networking, OpenShift and Rancher.
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.…
Kubernetes is very popular and well-known open-source orchestration platform for containers. Very dynamic ecosystem, the release cycle is also very fast. Six months passed since the K8s team announced the dockershim will be deprecated and the 1.22 release deadline is approaching. As they informed in their quite detailed post in early Dec. 2020, Docker support will be removed in 1.22…
By Franck Pachot . I have published 105 additional blog posts here since the 500th one https://www.dbi-services.com/blog/rollback-to-savepoint/ that I have written on my come back to dbi-services. On Oracle Database, of course, other databases as well, on clouds (OCI and AWS mainly, with a look at GCP and Azure). But also with some thoughts on the rise of the “scale-out”…
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…
By Franck Pachot . Google Cloud, Open Source and Oracle Databases… what seems to be a paradox is possible, thanks to cloud providers who contribute to open infrastructure. The idea is to use Operators (custom resource controllers on Kubernetes) to automate the Oracle Database operations in a standard, open and portable way. If you ever attempted to run Oracle Database…
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…
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…
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…
The is the next post in this little Rancher series. After we installed a single node RKE cluster and extended this configurtation to three nodes we will finally install Rancher in this post. As Rancher is installed with Helm we need to install that first: rancher@rancher1:~$ wget https://get.helm.sh/helm-v3.5.2-linux-amd64.tar.gz rancher@rancher1:~$ tar axf helm-v3.5.2-linux-amd64.tar.gz rancher@rancher1:~$ sudo mv linux-amd64/helm /usr/local/bin/ rancher@rancher1:~$ sudo chown…
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…
If you want to play with Rancher you have several options, as outlined in the documentation. There are quick starts for the major public cloud providers (using Terraform), you can install it on a Linux host by using the Rancher container or you can do it on your own. We’ll be doing it step by step, as I believe that…
Over the last years GitLab became one of the most popular and powerful open source git source code platform. From pure source code repository to a DevOps platform, it’s interesting to see how GitLab has evolved and this is reflected in the technological choices made by the technical teams. GitLab can be deployed on Cloud or On-premise environments in multiple…
