README.md

Into to CNCF world with Kubernetes.

This directory contains the presentation and a demo video used in AWS Community Day - Kochi on 16th Dec 2023.

Presentation

Recording

Notes

Pre-requisite

The setup is on VirtualBox and installed Ubuntu 22.04 with minimal option Primary network set to host-only Secondary network set to NAT Default user is set to ansil

Set IP on HostOnly Interface

IP: 192.168.56.101
Mask: 255.255.255.0

Install ssh and curl

sudo apt-get install ssh curl
systemctl enable ssh

SSH into the system

ssh [email protected]

Docker installation

curl https://releases.rancher.com/install-docker/20.10.sh | sh

Add present user to docker group

sudo usermod -aG docker $USER

Create staging area for rke

mkdir rke_setup
cd rke_setup

Download RKE binary and make it executable

curl -L https://github.com/rancher/rke/releases/download/v1.4.11/rke_linux-amd64 -o rke
chmod +x rke

Generate SSH keys

ssh-keygen 

Copy the SSH public key to the node

ssh-copy-id [email protected]

Create single node k8s cluster configuration

./rke config 

Edit the cluster configuration and set cni to none

vi cluster.yml

network:
  plugin: none

Make the cluster up

./rke up

Check the state file and kubeconfig files after cluster creation

ls -lrt 

Download kubernetes client

curl -LO "https://dl.k8s.io/release/v1.26.9/bin/linux/amd64/kubectl"
chmod +x kubectl 

Set configuration for Kubernetes clients

export KUBECONFIG=$HOME/rke_setup/kube_config_cluster.yml

Download Kubernetes package manager - Helm

curl -L https://get.helm.sh/helm-v3.13.2-linux-amd64.tar.gz | tar -zxvf - --strip-components=1 linux-amd64/helm

Install Cilium CNI

./helm repo add cilium https://helm.cilium.io
./helm repo update
./helm install cilium cilium/cilium --set operator.replicas=1 -n kube-system

Download Cilium cli

curl -L https://github.com/cilium/cilium-cli/releases/download/v0.15.17/cilium-linux-amd64.tar.gz | tar -zxvf -
./cilium status -n kube-system

Restart pending pods to get IPs from Cilium

kubectl get pods --all-namespaces -o custom-columns=NAMESPACE:.metadata.namespace,NAME:.metadata.name,HOSTNETWORK:.spec.hostNetwork --no-headers=true | grep '<none>' | awk '{print "-n "$1" "$2}' | xargs -L 1 -r kubectl delete pod

Kubernetes Dashboard deployment

./kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.7.0/aio/deploy/recommended.yaml

Create an account to login to Dashboard

./kubectl create -f - <<EOF
apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin-user
  namespace: kubernetes-dashboard
EOF

./kubectl create -f - <<EOF
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: admin-user
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: admin-user
  namespace: kubernetes-dashboard
EOF

Create a token and note it down

./kubectl -n kubernetes-dashboard create token admin-user    

Start a proxy connection to Kubernetes

./kubectl proxy

Access the Dashboard

http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/

Now enter the toke you got from previous step to login to the dashboard!