Environment Setup

This is part of the Charmed Temporal Tutorial. Please refer to this page for more information and the overview of the content.

Minimum Requirements

Before we start, make sure your machine meets the following requirements:

• A machine running Ubuntu 22.04 (Jammy) or later. Machines running other operating systems may opt for the use of Multipass. A simple set of instructions to set up Multipass can be found here. Please keep in mind that the instructions in this tutorial have not been tested with Multipass.
• 8GB of RAM.
• 2 CPU threads.
• At least 20GB of available storage.
• Access to the internet for downloading the required snaps and charms.

Install MicroK8s

On your machine, install and configure MicroK8s:

# Install Microk8s from snap:
sudo snap install microk8s --channel 1.25-strict/stable

# Add your user to the MicroK8s group:
sudo usermod -a -G snap_microk8s $USER

# Give your user permissions to read the ~/.kube directory:
sudo chown -f -R $USER ~/.kube

# Create the 'microk8s' group:
newgrp snap_microk8s

# Enable the necessary MicroK8s addons:
sudo microk8s enable hostpath-storage dns

# Set up a short alias for the Kubernetes CLI:
sudo snap alias microk8s.kubectl kubectl

MicroK8s is a minimal production Kubernetes, so now you have a small Kubernetes cloud (by default called microk8s) on your machine.

Set up Juju

On your machine, install Juju, connect it to your MicroK8s cloud, and prepare a workspace (‘model’):

# Install 'juju':
sudo snap install juju --channel 3.1/stable
# >>> juju (3.1/stable) 3.1.5 from Canonical✓ installed

# Since the juju package is strictly confined, you also need to manually create a path:
mkdir -p ~/.local/share

# Register your "microk8s" cloud with juju:
# Not necessary --juju recognises a MicroK8s cloud automatically, as you can see by running 'juju clouds'.
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 this doesn't happen, you can register it manually using 'juju add-k8s microk8s'.)

# Install a "juju" controller into your "microk8s" cloud.
# We'll name ours "temporal-controller".
juju bootstrap microk8s temporal-controller

# Create a workspace, or 'model', on this controller.
# We'll call ours "temporal-model".
# Juju will create a Kubernetes namespace "temporal-model"
juju add-model temporal-model

# Check status:
juju status
# >>> Model         Controller           Cloud/Region        Version  SLA          Timestamp
# >>> temporal-model  temporal-controller  microk8s/localhost  3.1.5    unsupported  16:05:03+01:00

# >>> Model "admin/temporal-model" is empty.

See next: Deploying Temporal Server