Introduction and Installation Guide for Minikube on CentOS 7

Minikube Introduction Minikube is the simplest and fastest way to run a local Kubernetes cluster, useful for testing and development. Official site: https://minikube.sigs.k8s.io/ .

Prerequisites Prepare a CentOS 7 virtual machine and enable CPU virtualization.

Install Minikube

rpm -ivh minikube-1.3.1.rpm

Install VirtualBox (5.2+)

[virtualbox]
name=Oracle Linux / RHEL / CentOS-$releasever / $basearch - VirtualBox
baseurl=http://download.virtualbox.org/virtualbox/rpm/el/$releasever/$basearch
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://www.virtualbox.org/download/oracle_vbox.asc

yum install VirtualBox-5.2 -y
rcvboxdrv setup

Deploy Kubernetes Cluster (Linux)

# Install required development tools
yum -y install gcc perl make kernel-devel

Set up proxy environment variables (required to pull images):

export http_proxy=http://192.168.1.100:1087;
export https_proxy=http://192.168.1.100:1087;

minikube start \
  --docker-env http_proxy=http://192.168.1.100:1087 \
  --docker-env https_proxy=http://192.168.1.100:1087 \
  --docker-env no_proxy=localhost,192.168.1.100,192.168.99.0/24 \
  --log_dir=tmp --cpus 2 --memory 2048

The command output shows the creation of a VirtualBox VM, proxy settings, image pulling, and Kubernetes startup until the cluster is ready.

Install Dashboard

yum install xdg-utils

minikube dashboard
minikube dashboard --url

After launching, the dashboard URL (e.g., http://127.0.0.1:39099/api/v1/namespaces/kube-system/services/http:kubernetes-dashboard:/proxy/ ) can be accessed. You can stop it with Ctrl+C or run a manual proxy:

kubectl proxy --address='0.0.0.0' --port=39099 --accept-hosts='^*$'
Starting to serve on [::]:39099

Install kubectl

curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl
chmod +x ./kubectl
sudo mv ./kubectl /usr/local/bin/kubectl
kubectl version

Sample output shows client version v1.15.3 and server version v1.15.2. Verify the cluster with:

kubectl get nodes
NAME       STATUS   ROLES    AGE     VERSION
minikube   Ready    master   8m59s   v1.15.2

Common Minikube Commands

minikube version – show Minikube version minikube start – start the cluster minikube ssh – SSH into the VM minikube logs – view logs minikube dashboard – open the dashboard UI minikube ip – display VM IP address minikube stop – stop the VM minikube delete – delete the VM

FAQ

1. Install gcc, make, perl packages. 2. Install Linux kernel header files (kernel-devel). 3. "failed to open browser: exit status 3" – this warning does not affect functionality.