kubectl is a command line tool that runs commands against the clusters.

kubelet is a primary node agent that runs each node. kubeadm is a tool that we will be using to init control plane node and join worker node. You will require kubeadm, kubeletand kubectl when installing Kubernetes cluster nodes. modprobe overlay modprobe br_netfilter vim /etc/sysctl.d/k8s.conf -> Add the following content into k8s.conf -nf-call-iptables = 1 _forward = 1 -nf-call-ip6tables = 1 sysctl -system export OS=xUbuntu_20.04 export VER=1.22 export WEBSITE= echo 'deb $WEBSITE/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/$VER/$OS/ /' | tee -a /etc/apt//cri-0.list curl -L $WEBSITE/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/$VER/$OS/Release.key | apt-key add - echo 'deb $WEBSITE/repositories/devel:/kubic:/libcontainers:/stable/$OS/ /' | tee -a /etc/apt//libcontainers.list curl -L $WEBSITE/repositories/devel:/kubic:/libcontainers:/stable/$OS/Release.key | apt-key add - apt-get update apt-get install -y cri-o cri-o-runc systemctl daemon-reload systemctl enable crio systemctl start crio systemctl status crio

This example uses CRI-O however we can also install other container runtimes such as Docker that uses containerd. So, we will need to install a container runtime before installing Kubernetes. Kubernetes is a platform for container orchestration and CRI is a Kubernetes API that interacts with different container runtimes. sudo -i apt-get update & apt-get upgrade -y apt-get install -y vimĢ.2) Container runtime interface installation We will install tools such as Vim, which we will use later when setting up the Kubernetes. Voila, the Ubuntu installation is complete.

Install ubuntu 20.04 on virtualbox