iglak / k3s-ansible

A fully automated HA k3s etcd install with kube-vip, MetalLB, and more

Build a Kubernetes HA-cluster using k3s & kube-vip & metal-lb via Ansible

Based on https://github.com/k3s-io/k3s-ansible

Forked from https://github.com/212850a/k3s-ansible

Kube-vip Control Plane is described -> https://kube-vip.io/control-plane/

Video here https://www.youtube.com/watch?v=CbkEWcUZ7zM

More docs here https://docs.technotim.live/posts/k3s-etcd-ansible/

K3s Ansible Playbook

Build a Kubernetes cluster using Ansible with k3s. The goal is easily install a Kubernetes cluster on machines running:

• Debian
• Ubuntu
• CentOS

on processor architecture:

• x64
• arm64
• armhf

System requirements

Deployment environment must have Ansible 2.4.0+ Master and nodes must have passwordless SSH access

Usage

First create a new directory based on the sample directory within the inventory directory:

cp -R inventory/sample inventory/my-cluster

Second, edit inventory/my-cluster/hosts.ini to match the system information gathered above. For example:

[master]
192.168.30.38
192.168.30.39
192.168.30.40

[node]
192.168.30.41
192.168.30.42

[k3s_cluster:children]
master
node

If multiple hosts are in the master group, the playbook will automatically setup k3s in HA mode with etcd. https://rancher.com/docs/k3s/latest/en/installation/ha-embedded/ This requires at least k3s version 1.19.1

If needed, you can also edit inventory/my-cluster/group_vars/all.yml to match your environment.

Start provisioning of the cluster using the following command:

ansible-playbook site.yml -i inventory/my-cluster/hosts.ini

After deployment control plane will be accessible via virtual ip-address which is defined in inventory/group_vars/all.yml as apiserver_endpoint

Remove k3s cluster

ansible-playbook reset.yml -i inventory/my-cluster/hosts.ini

Note: add --ask-pass --ask-become-pass if you are using password logins over ssh

Kubeconfig

To get access to your Kubernetes cluster just

scp debian@master_ip:~/.kube/config ~/.kube/config

kube-vip

See https://kube-vip.chipzoller.dev/

MetalLB

see https://metallb.universe.tf/installation/