kubernetes.md

Kubernetes (k8s)

• Easiest way to set up a local single node cluster is via one of the following:
  • Rancher Desktop
  • minikube
    • Incidentally, minikube ships with the Kubernetes Dashboard

      minikube dashboard

    • The boilerplate Terraform plan below hasn't been tested against minikube
  • multipass with microk8s
• Add aliases to ~/.bashrc or ~/.zshrc

  # k8s
  alias k="kubectl"
  alias kc="kubectl config use-context"
  alias kns='kubectl config set-context --current --namespace'
  alias kgns="kubectl config view --minify --output 'jsonpath={..namespace}' | xargs printf '%s\n'"
  KUBECONFIG="$HOME/.kube/config:$HOME/.kube/kubeconfig:$HOME/.kube/k3s.yaml"

• CLI/TUI (terminal user interface) management of k8s
  • k9s
    • Built-in help: type ?
    • Main Screen: :pod
    • Describe a pod: d
    • Delete a pod:
      • ctrl-d
      • Replicas rebuild
    • Remove resource (permanent)
      • :deploy
      • ctrl-d
• POC

  git clone https://github.com/jwsy/simplest-k8s.git
  k config get-contexts                    # should have `rancher-desktop` selected
  kc rancher-desktop                       # switch to rancher context if not
  k create namespace simplest-k8s
  k apply -n simplest-k8s -f simplest-k8s
  k delete -n simplest-k8s -f simplest-k8s
  k delete namespace simplest-k8s

  • Navigate to https://jade-shooter.rancher.localhost/ in Chrome
  • Allow self-signed cert
  • Profit 💸