libki-k8s

Installing Libki on Raspberry Pi

Image the Memory card

Follow the official raspberry pi docs to image RaspbianOS (32bit only as of the time of this writing) into your memory card.

[Optional] Setup headless Raspberry Pi

If desired, before ejecting the memory card, follow the steps here to setup a headless raspberry pi. Summarized below (on OSX):

Enable SSH

touch /Volumes/boot/ssh

Auto-join Wifi

1. touch /Volumes/boot/wpa_supplicant.conf
2. vim /Volumes/boot/wpa_supplicant.conf
3. Paste:

   country=US
   ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
   update_config=1
   
   network={
       ssid="<NETWORK-NAME>"
       psk="<NETWORK-PASSWORD>"
   }
   

Congratulations You are now ready to eject the memory card, insert it into the raspberry pi and boot it up!

[Optional] Cert-auth for SSH

Follow the guide here to setup ssh with key. Steps are summarized below:

1. On your client machine (that will connect to raspberry pi), run:

   cat ~/.ssh/id_rsa.pub

   And copy the output
2. SSH into raspberry pi

   ssh [email protected]

   default password is raspberry
3. Run:

   install -d -m 700 ~/.ssh

4. Run:

   nano ~/.ssh/authorized_keys

5. Paste the contents you copied from step 1

Setup K3s on the raspberry pi:

Follow the guide here to install k3s on your raspberry pi. Steps are summarized below:

1. Run:

   curl -fsSL https://get.docker.com -o get-docker.sh
   sudo sh get-docker.sh
   sudo usermod -aG docker pi
   su - pi

2. Run: sudo nano /boot/cmdline.txt and type cgroup_enable=memory cgroup_memory=1 at the end of the line.
3. Reboot the raspberry pi shutdown -r
4. Run:

   sudo curl -sfL https://get.k3s.io | sh -s - --docker

Congratulations You have successfully installed k8s on your raspberry pi

Installing Libki on k8s

NOTE

If running on raspberry pi k3s, prefix all kubectl commands with sudo

1. Run:

   kubectl apply -f https://raw.githubusercontent.com/EngHabu/libki-k8s/main/kustomize/k8s_generated.yaml
   
   kubectl wait --for=condition=available --all deployments --timeout=10m || ( echo >&2 "Timed out while waiting for the deployments to become ready"; exit 1 )
   
   kubectl rollout status --all

2. Create admin user: a. Run:

   kubectl get pods -n libki

   And note the libki server's pod name b. Run:

   kubectl exec -n libki <pod name> -- perl script/administration/create_user.pl -u admin -p password -s

3. Port forward the libki service to validate everything is fine:

   kubectl port-forward -n libki service/libki 10443:443

   Or if on RPI's k3s:

   sudo k3s kubectl port-forward -n libki service/libki 10443:443 --address 0.0.0.0

4. Visit localhost or raspberry pi and login with admin and password.

   NOTE

   Make sure to change your password as soon as you login.

Congratulations

You have a running deployment of libki.

Follow-ups

1. Set up ingress
2. Increase the number of replicas for the libki server
3. Add kustomize overlays for beefier k8s deployments (more container resources... etc.)
4. Setup a cluster of Raspberry PIs to ensure the k8s cluster high-availability.