This playbook will build an HA Kubernetes cluster with k3s, kube-vip and MetalLB via ansible.

It is based on the work from this fork which is based on the work from k3s-io/k3s-ansible. It uses kube-vip to create a load balancer for control plane, and metal-lb for its service LoadBalancer.

If you want more context on how this works, see:

📄 Documentation

📺 Video

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

• Debian
• Ubuntu
• CentOS

on processor architecture:

• x64
• arm64
• armhf

• Deployment environment must have Ansible 2.4.0+
• server and agent nodes should have passwordless SSH access, tf not you can supply arguments to provide credentials -ask-pass --ask-become-pass to ach command.

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

To copy your kube config locally so that you can access your Kubernetes cluster run:

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