- rename fresh installed Pi nodes (based on insspb/ansible-role-hostname)
- reduce SD card wear out on the Pi nodes (based on ecdye/zram-config)
- deploy a simple k3s cluster on five Raspberry Pi nodes (based on k3s-io/k3s-ansible)
- mount a shared NFS folder on every node
- using a simple playbook
- local DNS already provisioned with cluster nodes' MAC addresses, IP and hostnames (in my case
pinode[0-4]) - Fresh Raspberry Pi OS Lite on the SD cards, SSH enabled, your SSH public key already deployed on these (Hint: use the Raspberry Pi Imager, [Ctrl]+[Shift]+[X] to use advanced options, enable ssh and set your public key(s) in
authorized_keysfor 'pi' user) - a shared NFS folder on a NAS or another server (future use: for containers' volumes)
- a recent Ansible, Kubectl and GNU Make installed on your computer
# Fast information
make
# Edit inventory
# [...]
# Run the playbook
make deployBasic test, once cluster installed:
make test
Awaited result:
$ make test
kubectl get nodes
-----------------
NAME STATUS ROLES AGE VERSION
pinode0 Ready control-plane,master 36h v1.22.3+k3s1
pinode4 Ready <none> 36h v1.22.3+k3s1
pinode3 Ready <none> 36h v1.22.3+k3s1
pinode2 Ready <none> 36h v1.22.3+k3s1
pinode1 Ready <none> 36h v1.22.3+k3s1
kubectl get pods -A
-------------------
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system helm-install-traefik-crd--1-h7xrp 0/1 Completed 0 36h
kube-system helm-install-traefik--1-7ntvr 0/1 Completed 1 36h
kube-system svclb-traefik-fr9jz 2/2 Running 6 (10h ago) 36h
kube-system metrics-server-9cf544f65-787g7 1/1 Running 3 (10h ago) 36h
kube-system coredns-85cb69466-7c245 1/1 Running 3 (10h ago) 36h
kube-system svclb-traefik-scr9v 2/2 Running 6 (10h ago) 36h
kube-system svclb-traefik-f6nb9 2/2 Running 6 (10h ago) 36h
kube-system svclb-traefik-76qbh 2/2 Running 6 (10h ago) 36h
kube-system svclb-traefik-lcdjc 2/2 Running 6 (10h ago) 36h
kube-system traefik-74dd4975f9-wp4vx 1/1 Running 3 (10h ago) 36h
kube-system local-path-provisioner-64ffb68fd-hh5fg 1/1 Running 5 (10h ago) 36h
kubectl top node
----------------
NAME CPU(cores) CPU% MEMORY(bytes) MEMORY%
pinode0 592m 14% 817Mi 84%
pinode1 195m 4% 271Mi 27%
pinode2 196m 4% 270Mi 27%
pinode3 104m 2% 273Mi 28%
pinode4 198m 4% 303Mi 31%
kubectl top pod -A
------------------
NAMESPACE NAME CPU(cores) MEMORY(bytes)
kube-system coredns-85cb69466-7c245 7m 12Mi
kube-system local-path-provisioner-64ffb68fd-hh5fg 1m 8Mi
kube-system metrics-server-9cf544f65-787g7 14m 16Mi
kube-system svclb-traefik-76qbh 0m 1Mi
kube-system svclb-traefik-f6nb9 0m 1Mi
kube-system svclb-traefik-fr9jz 0m 0Mi
kube-system svclb-traefik-lcdjc 0m 1Mi
kube-system svclb-traefik-scr9v 0m 1Mi
kube-system traefik-74dd4975f9-wp4vx 1m 15Mi