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InstallK3s.md

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Installing k3s on a SUSE OS

At the end of the Lab you will have:

  • K3s install and configure k3s on a Raspberry Pi

Prerequisites:

  • x86 or Raspberry Pi server
  • SUSE OS installed (SLE 15sp2,SLE Micro, Leap)

Installing K3s

1) Open a Terminal and ssh to you host

ssh [email protected]

2)Update to the latest patches

sudo zypper up

3) Ensure you have the needed packages

sudo zypper in which

4) Punch a hole in the firewall or turn it off

firewall-cmd --zone=public --add-port=6443/tcp --permanent
firewall-cmd --reload

OR disable and turn off

sudo systemctl disable --now firewalld

5) Install k3s via the automated script

We are using the --write-kubeconfig-mode 644 option so the .kube/config file is automatically created

curl -sfL https://get.k3s.io | INSTALL_K3S_VERSION=v1.19.8+k3s1 K3S_KUBECONFIG_MODE=0644 sh -

The output will look simular to:

[INFO]  Finding release for channel stable
[INFO]  Using v1.18.8+k3s1 as release
[INFO]  Downloading hash https://github.com/rancher/k3s/releases/download/v1.18.8+k3s1/sha256sum-arm64.txt
[INFO]  Downloading binary https://github.com/rancher/k3s/releases/download/v1.18.8+k3s1/k3s-arm64
[INFO]  Verifying binary download
[INFO]  Installing k3s to /usr/local/bin/k3s
[INFO]  Creating /usr/local/bin/kubectl symlink to k3s
[INFO]  Creating /usr/local/bin/crictl symlink to k3s
[INFO]  Creating /usr/local/bin/ctr symlink to k3s
[INFO]  Creating killall script /usr/local/bin/k3s-killall.sh
[INFO]  Creating uninstall script /usr/local/bin/k3s-uninstall.sh
[INFO]  env: Creating environment file /etc/systemd/system/k3s.service.env
[INFO]  systemd: Creating service file /etc/systemd/system/k3s.service
[INFO]  systemd: Enabling k3s unit
Created symlink /etc/systemd/system/multi-user.target.wants/k3s.service → /etc/systemd/system/k3s.service.
[INFO]  systemd: Starting k3s

6) Test to see if it's working

kubectl get nodes

Example:

NAME        STATUS   ROLES    AGE   VERSION
pi-erin-1   Ready    master   55s   v1.18.9+k3s1

7) Want to add bash completion?

kubectl completion bash >/etc/bash_completion.d/kubectl

Logout and log back in to activate.

8) Need helm to work?

First, Follow the instructions to install Helm in the Installation of Kubernetes Tools

You will not need to install kubectl since the k3s install already did that for you.

9) Export the k3s.yaml

export KUBECONFIG=/etc/rancher/k3s/k3s.yaml

or you can symlink it ensure you have .kube/config in your home directory for tux use

ln -s /etc/rancher/k3s/k3s.yaml /home/tux/.kube/config

Done. Time to move on to adding a workload.