linux.md

(1) Install Azure CLI and Kubectl

• Install Azure CLI on Liux (don't use apt install azure-cli directly on WSL, use below script)

curl -sL https://aka.ms/InstallAzureCLIDeb | sudo bash

• Install kubectl using azure cli on Linux (Recommended for AKS)

sudo az aks install-cli

• kubectl and kubelogin will be downloaded to /usr/local/bin ($PATH)
• Use below command to modify .kube/config file by adding the login method (Below command uses Azure CLI)

export KUBECONFIG=~/.kube/config
kubelogin convert-kubeconfig -l azurecli

(2) Add auto completion and Set alias for kubectl as k

• open .bashrc file

vim ~/.bashrc

• Add following code to .bashrc

source <(kubectl completion bash)
complete -F __start_kubectl k
alias k=kubectl
alias kn='k config set-context --current --namespace'

• Reload bash profile

source ~/.bashrc

(3) Connect to AKS Node (by running privileged pod on the node)

• Using kubectl debug (https://learn.microsoft.com/en-us/azure/aks/node-access)
• Using node-shell (Uses an alpine pod with nsenter for Linux nodes) (https://github.com/kvaps/kubectl-node-shell)

(4) AKS linux networking command (For Kubenet network pugin)

• To see the node internal route table (Connect to the node)
• This displays the routing table which includes entries added by kubenet for routing traffic between pods in the same node

ip route show

• To see the ARP table
• Output indicates the pod ips, associated mac and interface

arp -a