K3s is a trivial, lightweight, easy to install, implement, and operate version of standard Kubernetes (K8s). The main part is it is not a fork of Kubernetes. K3s is a certified Kubernetes lightweight distribution. It can be used to run production workload as well. I found it is easier to install K3S than Minikube How to Install Minikube on Ubuntu - Step by Step.
I am installing K3s on the Ubuntu system, for this first I am updating and upgrading the Ubuntu OS system before proceeding. Later install curl tool.
root@AnsibleAWX:~# root@AnsibleAWX:~# apt-get update Hit:1 http://us.archive.ubuntu.com/ubuntu focal InRelease Hit:2 http://us.archive.ubuntu.com/ubuntu focal-updates InRelease Hit:3 http://us.archive.ubuntu.com/ubuntu focal-backports InRelease Hit:4 http://security.ubuntu.com/ubuntu focal-security InRelease Reading package lists... Done root@AnsibleAWX:~# root@AnsibleAWX:~# apt-get upgrade -y Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done The following packages have been kept back: fwupd gir1.2-javascriptcoregtk-4.0 gir1.2-webkit2-4.0 gnome-shell-extension-desktop-icons gvfs gvfs-backends gvfs-bin gvfs-common gvfs-daemons gvfs-fuse gvfs-libs libegl-mesa0 libfwupd2 libfwupdplugin1 libgbm1 libgl1-mesa-dri libglapi-mesa libglx-mesa0 libjavascriptcoregtk-4.0-18 libsmbclient libwbclient0 libwebkit2gtk-4.0-37 libxatracker2 linux-generic-hwe-20.04 linux-headers-generic-hwe-20.04 linux-image-generic-hwe-20.04 mesa-vulkan-drivers samba-libs ubuntu-advantage-tools 0 upgraded, 0 newly installed, 0 to remove and 29 not upgraded. root@AnsibleAWX:~# root@AnsibleAWX:~# apt-get install curl vim Reading package lists... Done Building dependency tree Reading state information... Done curl is already the newest version (7.68.0-1ubuntu2.14). vim is already the newest version (2:8.1.2269-1ubuntu5.9). 0 upgraded, 0 newly installed, 0 to remove and 29 not upgraded. root@AnsibleAWX:~#
Next to install k3s, bash sh script exists online on k3s.io website, which needs to be downloaded with curl and it will install it at the same time. It will create a Kubernetes environment for you, so no other tools are required to install.
root@AnsibleAWX:~#
root@AnsibleAWX:~# curl -sfL https://get.k3s.io | sh -
[INFO] Finding release for channel stable
[INFO] Using v1.25.4+k3s1 as release
[INFO] Downloading hash https://github.com/k3s-io/k3s/releases/download/v1.25.4+k3s1/sha256sum-amd64.txt
[INFO] Downloading binary https://github.com/k3s-io/k3s/releases/download/v1.25.4+k3s1/k3s
[INFO] Verifying binary download
[INFO] Installing k3s to /usr/local/bin/k3s
[INFO] Skipping installation of SELinux RPM
[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
root@AnsibleAWX:~#
Once the Kubernetes cluster is set up, check the status of K3s by running the below command it's all good and ready to deploy pods.
root@AnsibleAWX:~# root@AnsibleAWX:~# kubectl get nodes NAME STATUS ROLES AGE VERSION ansibleawx Ready control-plane,master 2m56s v1.25.4+k3s1 root@AnsibleAWX:~# root@AnsibleAWX:~# kubectl get pods -A NAMESPACE NAME READY STATUS RESTARTS AGE kube-system coredns-597584b69b-mq62g 1/1 Running 0 3m11s kube-system local-path-provisioner-79f67d76f8-8rj7d 1/1 Running 0 3m11s kube-system helm-install-traefik-crd-d2g28 0/1 Completed 0 3m12s kube-system helm-install-traefik-29p82 0/1 Completed 1 3m12s kube-system svclb-traefik-f936d094-mrh6p 2/2 Running 0 2m54s kube-system metrics-server-5c8978b444-xtkmx 1/1 Running 0 3m11s kube-system traefik-bb69b68cd-m9bb8 1/1 Running 0 2m54s root@AnsibleAWX:~#
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