Instruction

How to prepare microk8s in ubuntu24.10 for application development

Required resources

• [X] ubuntu 24.10
• [X] 24Gb memory
• [X] 10 cores

Steps

• prepare ubuntu 24.10 (vm or install to your PC)
• make sure that you have static local ip for your ubuntu (if ip will change, microk8s become unavailable)
• install microk8s, kubectl and helm

for package in "microk8s --classic" "helm --classic" "kubectl --classic" ; do sudo snap install $package; done

• fix permissons to microk8s for non root user

sudo usermod -a -G microk8s $USER
mkdir ~/.kube

• enable important k8s operators for development

microk8s enable dns
microk8s enable dashboard
microk8s enable storage
microk8s enable ingress
microk8s enable registry
microk8s enable cert-manager
microk8s enable prometheus

• check k8s single node cluster status

microk8s status

• save root user kubeconfig

microk8s config > ~/.kube/config
chmod 600 ~/.kube/config

• check that kubectl works

kubectl version

• get kubectl web dashboard token

kubectl get secret microk8s-dashboard-token --namespace=kube-system -o jsonpath="{.data.token}" | base64 --decode ; echo

Create ingress for operators

• create dasboard-ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: dashboard
  annotations:
    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
spec:
  ingressClassName: nginx
  tls:
    - hosts:
        - dashboard.k8s.localhost
  rules:
    - host: dashboard.k8s.localhost
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: kubernetes-dashboard
                port:
                  number: 443

• create grafana-ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: grafana
  annotations:
    nginx.ingress.kubernetes.io/backend-protocol: "HTTP"
spec:
  tls:
    - hosts:
        - 'grafana.k8s.localhost'
  ingressClassName: nginx
  rules:
    - host: 'grafana.k8s.localhost'
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: kube-prom-stack-grafana
                port:
                  number: 80

• create prometeus-ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: prometheus
  annotations:
    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
spec:
  ingressClassName: nginx
  tls:
    - hosts:
        - prometheus.k8s.localhost
  rules:
    - host: prometheus.k8s.localhost
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: prometheus-operated
                port:
                  number: 9090

• deploy ingresses

kubectl apply -f dasboard-ingress.yaml --namespace=kube-system
kubectl apply -f grafana-ingress.yaml --namespace=observability
kubectl apply -f prometeus-ingress.yaml --namespace=observability

• in web browser try to login to kubernetes dashboard https://dashboard.k8s.localhost with token

Create self signed certificates issuer

• create selfsigned-cluster-issuer.yaml

apiVersion: cert-manager.io/v1
kind: ClusterIssuer
metadata:
  name: selfsigned-cluster-issuer
spec:
  selfSigned: {}

• deploy selfsigned-cluster-issuer

kubectl apply -f selfsigned-cluster-issuer.yaml --namespace=cert-manager

Create custom application namespace

• create applicatoins-ns.yaml

kind: Namespace
apiVersion: v1
metadata:
  name: applications

• deploy applicatoins namespace

kubectl apply -f applicatoins-ns.yaml

Documentation

How to use microk8s single node cluster

• switch to applications namespace

kubectl config set-context --current --namespace=applications

• get current namespace

kubectl config view --minify -o jsonpath='{..namespace}'; echo

Feel free to use it!

Cluster hot links:

• https://dashboard.k8s.localhost
• https://grafana.k8s.localhost/?orgId=1 (admin/prom-operator)
• https://prometheus.k8s.localhost/targets?search=

Persistent volumes for microk8s

• default persistent volumes stogare path: /var/snap/microk8s/common/default-storage