94 lines
2.1 KiB
Markdown
94 lines
2.1 KiB
Markdown
# Build a Kubernetes HA-cluster using k3s & kube-vip & metal-lb via Ansible
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Based on <https://github.com/k3s-io/k3s-ansible>
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Forked from <https://github.com/212850a/k3s-ansible>
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Kube-vip Control Plane is described -> <https://kube-vip.io/control-plane/>
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Video here <https://www.youtube.com/watch?v=CbkEWcUZ7zM>
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More docs here <https://docs.technotim.live/posts/k3s-etcd-ansible/>
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## K3s Ansible Playbook
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Build a Kubernetes cluster using Ansible with k3s. The goal is easily install a Kubernetes cluster on machines running:
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- [X] Debian
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- [X] Ubuntu
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- [X] CentOS
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on processor architecture:
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- [X] x64
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- [X] arm64
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- [X] armhf
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## System requirements
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Deployment environment must have Ansible 2.4.0+
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Master and nodes must have passwordless SSH access
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## Usage
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First create a new directory based on the `sample` directory within the `inventory` directory:
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```bash
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cp -R inventory/sample inventory/my-cluster
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```
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Second, edit `inventory/my-cluster/hosts.ini` to match the system information gathered above. For example:
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```ini
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[master]
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192.168.30.38
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192.168.30.39
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192.168.30.40
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[node]
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192.168.30.41
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192.168.30.42
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[k3s_cluster:children]
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master
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node
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```
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If multiple hosts are in the master group, the playbook will automatically setup k3s in HA mode with etcd.
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<https://rancher.com/docs/k3s/latest/en/installation/ha-embedded/>
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This requires at least k3s version 1.19.1
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If needed, you can also edit `inventory/my-cluster/group_vars/all.yml` to match your environment.
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Start provisioning of the cluster using the following command:
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```bash
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ansible-playbook site.yml -i inventory/my-cluster/hosts.ini
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```
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After deployment control plane will be accessible via virtual ip-address which is defined in inventory/group_vars/all.yml as apiserver_endpoint
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Remove k3s cluster
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```bash
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ansible-playbook reset.yml -i inventory/my-cluster/hosts.ini
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```
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**Note: add --ask-pass --ask-become-pass if you are using password logins over ssh**
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## Kubeconfig
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To get access to your **Kubernetes** cluster just
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```bash
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scp debian@master_ip:~/.kube/config ~/.kube/config
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```
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## kube-vip
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See <https://kube-vip.chipzoller.dev/>
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## MetalLB
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see <https://metallb.universe.tf/installation/>
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