In this guide we will create a Kubernetes cluster using VirtualBox.
To see a live demo of this writeup, visit Youtube here:
How to Get VirtualBox
Install VirtualBox with your operating system package manager or from the website. For example, on Ubuntu for x86:
apt install virtualbox
You can download
curl -sL https://talos.dev/install | sh
Download ISO Image
Download the ISO image from the Talos release page.
You can download
mkdir -p _out/
curl https://github.com/siderolabs/talos/releases/download/<version>/metal-<arch>.iso -L -o _out/metal-<arch>.iso
For example version
mkdir -p _out/
curl https://github.com/siderolabs/talos/releases/download/v1.7.0-alpha.0/metal-amd64.iso -L -o _out/metal-amd64.iso
Start by creating a new VM by clicking the “New” button in the VirtualBox UI:
Supply a name for this VM, and specify the Type and Version:
Edit the memory to supply at least 2GB of RAM for the VM:
Proceed through the disk settings, keeping the defaults. You can increase the disk space if desired.
Once created, select the VM and hit “Settings”:
In the “System” section, supply at least 2 CPUs:
In the “Network” section, switch the network “Attached To” section to “Bridged Adapter”:
Finally, in the “Storage” section, select the optical drive and, on the right, select the ISO by browsing your filesystem:
Repeat this process for a second VM to use as a worker node. You can also repeat this for additional nodes desired.
Start Control Plane Node
Once the VMs have been created and updated, start the VM that will be the first control plane node.
This VM will boot the ISO image specified earlier and enter “maintenance mode”.
Once the machine has entered maintenance mode, there will be a console log that details the IP address that the node received.
Take note of this IP address, which will be referred to as
$CONTROL_PLANE_IP for the rest of this guide.
If you wish to export this IP as a bash variable, simply issue a command like
Generate Machine Configurations
With the IP address above, you can now generate the machine configurations to use for installing Talos and Kubernetes. Issue the following command, updating the output directory, cluster name, and control plane IP as you see fit:
talosctl gen config talos-vbox-cluster https://$CONTROL_PLANE_IP:6443 --output-dir _out
This will create several files in the
_out directory: controlplane.yaml, worker.yaml, and talosconfig.
Create Control Plane Node
controlplane.yaml generated above, you can now apply this config using talosctl.
talosctl apply-config --insecure --nodes $CONTROL_PLANE_IP --file _out/controlplane.yaml
You should now see some action in the VirtualBox console for this VM. Talos will be installed to disk, the VM will reboot, and then Talos will configure the Kubernetes control plane on this VM.
Note: This process can be repeated multiple times to create an HA control plane.
Create Worker Node
Create at least a single worker node using a process similar to the control plane creation above.
Start the worker node VM and wait for it to enter “maintenance mode”.
Take note of the worker node’s IP address, which will be referred to as
talosctl apply-config --insecure --nodes $WORKER_IP --file _out/worker.yaml
Note: This process can be repeated multiple times to add additional workers.
Using the Cluster
Once the cluster is available, you can make use of
kubectl to interact with the cluster.
For example, to view current running containers, run
talosctl containers for a list of containers in the
system namespace, or
talosctl containers -k for the
To view the logs of a container, use
talosctl logs <container> or
talosctl logs -k <container>.
First, configure talosctl to talk to your control plane node by issuing the following, updating paths and IPs as necessary:
talosctl config endpoint $CONTROL_PLANE_IP
talosctl config node $CONTROL_PLANE_IP
talosctl --talosconfig $TALOSCONFIG config endpoint <control plane 1 IP>
talosctl --talosconfig $TALOSCONFIG config node <control plane 1 IP>
talosctl --talosconfig $TALOSCONFIG bootstrap
At this point we can retrieve the admin
kubeconfig by running:
talosctl --talosconfig $TALOSCONFIG kubeconfig .
You can then use kubectl in this fashion:
kubectl get nodes
To cleanup, simply stop and delete the virtual machines from the VirtualBox UI.