Cluster infrastructure setup

Cluster master

Manual steps:

• install ansible
• install kubernetes

Cluster nodes

Manual steps for odroid:

• internet connection (wifi credentials)

• start ssh

  • install ssh with $ sudo apt install openssh-server

• install kubernetes

Manual steps for raspberrypi:

• internet connection (wifi credentials)

• enable & start ssh

  • $ sudo systemctl enable ssh
  • $ sudo systemctl start ssh

• install kubernetes

Troubleshooting

In case kube-proxy pod on odroid or raspberrypi doesn't run, try to apply daemonset-arm64.yaml on odroid and daemonset-armhf.yaml on raspberry, which should fix it. Please also look at the issue coreos/quartermaster#79.

Infrastructure setup with bare metal

• Creating k8s cluster with raspberrypi as master and odroid as worker node

$ ansible-playbook playbook.yml --ask-become-pass --tags "k8s.cluster" -i hosts
and some manual described in the command's result. Install waeave plugin here too.

After that, you have to create a DeamonSet for odroid similar to files/deamonset-arm64.yaml in the project: oc create -f {odroid arm64 dameonset yaml}. After that you should join the odroid node. Everything is exactly described here: https://gist.github.com/squidpickles/dda268d9a444c600418da5e1641239af

Infrastructure setup with Minikube

Installing minikube:

1. Followed the link https://kubernetes.io/docs/tasks/tools/install-minikube/

• Install kubectl
• Install minikube

2. Run the command: $ sudo minikube start --vm-driver=none
3. root user must be used: $ sudo su && kubectl get pods

Troubleshooting: if error occurs try to run the following commands: $ sudo kubeadm reset (delete certificates, configs of kubeadm created things) $ sudo minikube delete (delete the cluster) $ sudo rm -r ~/.minikube (delete everything of minikube) $ sudo rm -r ~/.kube (remove k8s configs)

Ansible Tasks

Installing the minikube

ansible-playbook playbook-minikube.yml --ask-become-pass --tags "minikube"

Initialize the minikube

ansible-playbook playbook-minikube.yml --ask-become-pass --tags "helm.init"

If helm is not installed yet, you have to install the helm with: $ ansible-playbook playbook-minikube.yml --ask-become-pass --tags "helm.install" or to do both install and init run $ ansible-playbook playbook-minikube.yml --ask-become-pass --tags "helm"

Deploying and undeploying the meals-planner app with Helm

ansible-playbook playbook-minikube.yml --ask-become-pass --tags "deploy.helm"

ansible-playbook playbook-minikube.yml --ask-become-pass --tags "deploy.helm" -e "delete=true"

with kubectl

ansible-playbook playbook-minikube.yml --ask-become-pass --tags "deploy.kubectl"

ansible-playbook playbook-minikube.yml --ask-become-pass --tags "deploy.kubectl" -e "delete=true"