DO NOT USE UBUNTU 22.04

Isntal land start docker service.

sudo apt install docker.io -y
sudo systemctl status docker

Add apt-key package.

curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add

Add kubernetes to sources

echo "deb  http://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee -a /etc/apt/sources.list
sudo apt update

Install kubernetes tools

sudo apt-get install -y kubelet kubeadm kubectl kubernetes-cni

Turn off swap memory, and comment out the swapfile line.

sudo swapoff -a
sudo vi /etc/fstab
# comment out the swapfile line

---

Clone worker code at the stage. Set nodenames: On master

sudo hostnamectl set-hostname kubernetes-master

On worker

sudo hostnamectl set-hostname kubernetes-worker

---

To let iptables see bridged traffic:

sudo sysctl net.bridge.bridge-nf-call-iptables=1

Change docker cgroup driver:

sudo vi /etc/docker/daemon.json
# Write and save this
{ "exec-opts": ["native.cgroupdriver=systemd"],

"log-driver": "json-file",

"log-opts":

{ "max-size": "100m" },

"storage-driver": "overlay2"

}

#then reload and restart
sudo systemctl enable docker
sudo systemctl daemon-reload
sudo systemctl restart docker

On master node:

~~Start pod network~~ ~~Run these commands to setup flannel networking~~

Don't run this command directly, first copy this .yml file to your local machine. We need to edit the network CIDR so that it doesan't overlap with our host's network. My machine's IP was 10.50.91.229 when i used the default CIDR 10.244.0.0/16 it gave an error, hecne i edited the yaml file to point to different CIDR 100.96.0.0/16

sudo kubeadm init --pod-network-cidr=10.244.0.0/16

ON MASTER Run these comands as kubernetes will prompt you to:

  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

Before joining we need to setup pod networking with flannel

Make sure firewall ports are open, on both master and worker

sudo ufw allow 6443
sudo ufw allow 6443/tcp

ON MASTER

Then apply this file with kubectl apply -f flannel.yml

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

IDK why kubectl get pods was giving error but i ran these commands to restart kubectl

sudo systemctl stop kubelet
sudo systemctl start kubelet
strace -eopenat kubectl version

Join command:

kubeadm join 10.50.91.229:6443 --token yapy5z.w3q5cty0crd5o23o \
    --discovery-token-ca-cert-hash sha256:790001367e44ba52e3912dd3131c7bfc5c7acf3571497803944feede803b66b6

https://www.cloudsigma.com/how-to-install-and-use-kubernetes-on-ubuntu-20-04/

https://kubernetes.io/docs/tasks/run-application/run-stateless-application-deployment/

kubectl get pods --all-namespaces
kubectl create service nodeport heimdall-deployment --tcp=80:80
kubectl apply -f https://k8s.io/examples/application/deployment.yaml

https://stackoverflow.com/questions/57167104/how-to-use-local-docker-image-in-kubernetes-via-kubectl For local images, we need a local repo:

docker run -d -p 5000:5000 --restart=always --name registry registry:2

Then build with

docker build . -t localhost:5000/heimdall-dockv1:v1
docker push localhost:5000/heimdall-dockv1:v1