This part of the tutorial focuses on how to set up your environment and install the required dependencies.
Set up MicroK8s
Charmed Superset relies on Kubernetes (K8s) as a container orchestration system. For this tutorial, you will use MicroK8s, a lightweight distribution of K8s.
Install MicroK8s and provide your user with the required permissions. You can do so by adding it to the snap_microk8s group and giving permissions to the ~/.kube directory:
sudo snap install microk8s --channel 1.25-strict/stable
newgrp snap_microk8s
sudo usermod -a -G snap_microk8s $USER
sudo chown -f -R $USER ~/.kube
Enable now the necessary MicroK8s add-ons as follows:
sudo microk8s enable hostpath-storage dns
For ease, you can set up a short alias for the Kubernetes CLI with:
sudo snap alias microk8s.kubectl kubectl
Set up Juju
Charmed Superset uses Juju as the orchestration engine for software operators. Install and connect it to your MicroK8s cloud with the following steps.
Firstly, install juju from a snap:
sudo snap install juju --channel 3.5/stable
This charm requires juju with channel >= 3.4.
Since the Juju package is strictly confined, you also need to manually create a path:
mkdir -p ~/.local/share
Juju recognises a MicroK8s cloud automatically, as you can see by running juju clouds:
# >>> Cloud Regions Default Type Credentials Source Description
# >>> localhost 1 localhost lxd 0 built-in LXD Container Hypervisor
# >>> microk8s 1 localhost k8s 1 built-in A Kubernetes Cluster
If for any reason MicroK8s is not recognised, register it manually using juju add-k8s microk8s.
Next, install a Juju controller into your MicroK8s cloud. For this example, the controller is named “superset-controller”:
juju bootstrap microk8s superset-controller
Finally, create a model on this controller. For this example, the model is named “superset-model”. Juju will create a Kubernetes namespace “superset-model”:
juju add-model superset-model
After this, you should see something similar to the below when running juju status:
# >>> Model Controller Cloud/Region Version SLA Timestamp
# >>> superset-model superset-controller microk8s/localhost 3.5.3 unsupported 16:05:03+01:00
# >>> Model "admin/superset-model" is empty.
See next: Deploy supporting charms