Kubernetes

Introduction Kubernetes charms are the similar as traditional cloud charms. The same model is used. An application has units and each unit relation has its own data bag. The same hooks are invoked but unlike traditional …

Hello World Juju Kubernetes Here’s a basic set of instructions for setting up Juju to work with a given Kubernetes cloud. First, you’ll need to be running Juju: sudo snap install juju --classic Limitations and Prerequ…

Juju Kubernetes applications support Kubernets specific configuration knobs to control how Juju deploys the application on Kubernetes. The following are supported (these names are the Juju config attribute names; the k8s…

What is operator storage Juju creates a so-called operator pod for each deployed application. The operator pod is responsible for running the charm hooks for each deployed unit’s charm. Each charm needs persistent storag…

Persistent storage for stateful applications I just want an example that works On AWS, an example using dynamic persistent volumes. juju bootstrap aws juju deploy kubernetes-core juju deploy aws-integrator juju trust aw…

These are some topics and docs that I have found useful for reference when working on charms for Kubernetes models: Hello World with Juju and Microk8s - the easiest way to get started Topic: Juju, Kubernetes and mic…

A key difference with Kubernetes models vs vm based cloud models is how applications are scaled. On a traditional cloud, Juju has add/remove unit commands: juju add-unit mariadb -n 3 juju remove-unit mariadb/2 The key…

Juju models Kubernetes clusters as clouds The Kubernetes cloud definition contains the IP endpoint address of the master node and the CA cert necessary to establish a secure connection. Credentials work the same way as …