Install kubernetes cluster using Minikube

Minikube is a tool that enables developers to run a local Kubernetes cluster for testing and development. It’s lightweight and supports various environments.

Key Features

1. Local Kubernetes Cluster:
   • Runs a single-node Kubernetes cluster on your local machine.
2. Multi-Driver Support:
   • Works with Docker, VirtualBox, KVM, Hyper-V, and others.
3. Customizable Resources:
   • Configure CPU, memory, and disk allocation as needed.
4. Addons:
   • Supports additional Kubernetes features such as metrics-server, ingress, and dashboard.
5. Cross-Platform:
   • Compatible with Linux, macOS, and Windows.

Installation

For Linux

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curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
sudo install minikube-linux-amd64 /usr/local/bin/minikube

For MacOS

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brew install minikube

Set driver

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minikube config set driver <docker|kvm2|virtualbox>

View config

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minikube config view

Start or Create Minikube cluster

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minikube start

Start with different network

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docker network create --subnet=192.168.100.0/24 minikube-net

minikube start --driver=docker --network=minikube-net

Stop Minikube cluster

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minikube stop

Destroy Minikube cluster

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minikube delete

Check status of Minikube cluster

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minikube status

Launch Minikube cluster dashboard

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minikube dashboard --port=8085 --url

See Minikube IP

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minikube ip

Access Minikube bash

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minikube ssh

Enable specific Minikube add-on

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minikube addons enable <addon>

Access service exposed by Minikube

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minikube service <service-name>

Install Kubernetes dashboard ingress using DNS

We will use a wildcard test dns *.k8s.pvt.one which is pointed to 192.168.49.2. So, it will be easy to resolve without modifying of hosts file.

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kubectl -n kubernetes-dashboard edit svc kubernetes-dashboard

Change the type field from ClusterIP to NodePort:

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type: NodePort

Save and exit the editor.

Get the NodePort: Run the following command to find the NodePort:

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kubectl -n kubernetes-dashboard get svc kubernetes-dashboard

Enable ingress-

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minikube addons enable ingress

Create an Ingress YAML File: Save the following content to dashboard-ingress.yaml:

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apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: dashboard-ingress
  namespace: kubernetes-dashboard
spec:
  rules:
  - host: dashboard.k8s.pvt.one
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: kubernetes-dashboard
            port:
              number: 80

Apply dashboard ingress-

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kubectl apply -f dashboard-ingress.yaml

See ingress details for dns and ip attachments

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kubectl get ingress -n kubernetes-dashboard

Now visit this dashboard url:

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http://dashboard.k8s.pvt.one

Access remote Minikube cluster from local kubectl command

• Check server ip and port using following command

  1	minikube profile list

• Copy ca.crt, client.crt, client.key from following location of server.
  • ~/.minikube/ca.crt
  • ~/.minikube/profiles/minikube/client.crt
  • ~/.minikube/profiles/minikube/client.key
• Put these files into your local machine in ~/.kube/ directory.

• Create config file in ~/.kube directory

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  apiVersion: v1 clusters: - cluster: certificate-authority: /home/<user>/.kube/ca.crt server: https://192.168.49.2:8443 name: minikube contexts: - context: cluster: minikube namespace: default user: minikube name: minikube current-context: minikube kind: Config preferences: {} users: - name: minikube user: client-certificate: /home/<user>/.kube/client.crt client-key: /home/<user>/.kube/client.key

• Now use this command to verify

  1	kubectl cluster-info