k8s-demo/README.md

Kubernetes Local Cluster Demonstration

Kubernetes demonstration on your local machine

Prerequisites

1. Make sure to have docker or a OCI compatibile container engine installed
2. Make sure the docker/oci engine is running
3. Install kubectl for interacting with the kube api:
   • https://kubernetes.io/docs/tasks/tools/
4. Install kind
   • mac/brew: brew install kind
   • mac/macports: sudo port selfupdate && sudo port install kind
   • win/choco: choco install kind
   • win/winget: winget install Kubernetes.kind
   • linux: tbd
5. Have at least 8GB RAM and 20GB disk

Create cluster

1. kind create cluster --config cluster-config/config.yaml (1 control plane, 3 nodes)
2. Once complete, look at what is running in all namespaces: kubectl get pods -A

$ kubectl get pods -A
NAMESPACE            NAME                                         READY   STATUS    RESTARTS   AGE
kube-system          coredns-76f75df574-ddznd                     1/1     Running   0          7m16s
kube-system          coredns-76f75df574-ftv2c                     1/1     Running   0          7m16s
kube-system          etcd-demo-control-plane                      1/1     Running   0          7m31s
kube-system          kindnet-jj8bv                                1/1     Running   0          7m16s
kube-system          kube-apiserver-demo-control-plane            1/1     Running   0          7m31s
kube-system          kube-controller-manager-demo-control-plane   1/1     Running   0          7m31s
kube-system          kube-proxy-2wr8l                             1/1     Running   0          7m16s
kube-system          kube-scheduler-demo-control-plane            1/1     Running   0          7m31s
local-path-storage   local-path-provisioner-7577fdbbfb-jj2b7      1/1     Running   0          7m16s

You will want to wait for all pods to become ready (showing 1/1 in the READY field) and once complete you will have a cluster running on your computer.

Run services

Ingress Controller (nginx)

Ingress controllers manage incoming web traffic (usually HTTP/HTTPS)

1. kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/main/deploy/static/provider/kind/deploy.yaml

Wait for it to become available:

kubectl wait --namespace ingress-nginx \
  --for=condition=ready pod \
  --selector=app.kubernetes.io/component=controller \
  --timeout=300s

Usually you'll want to next install a load balancer, but for a single node cluster this is not required.

Observability

tbd - grafana, prometheus, alertmanager, thanos, servicemonitor, podmonitor

Sublinks in k8s

tbd

Troubleshooting

tbd

Cleanup

1. kind delete cluster