Minikube Quickstart

It’s time to learn Kubernetes, in fact, it’s probably past time. I’ve been working my way through Sander Van Vugt’s incredible Certified Kubernetes Application Developer(CKAD) video course and needed a test environment to apply what I’m learning. His course materials supply Minikube in a VirtualBox VM, and there’s nothing wrong with that. But since I’ve already got a perfectly good libvirt installation on my CentOS 8 server I wanted to stand Minikube up there. The installation steps available at https://minikube.sigs.k8s.io/docs/start/ got me exactly where I needed to be in about 15 minutes. Here’s what I did:

  • Download latest minicube package:
    • curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-latest.x86_64.rpm
  • Install:
    • sudo yum localinstall minikube-latest.x86_64.rpm
  • Validate your libvirt install. If you’re already running other virtual machines you should get nearly all greens with this check:
    • virt-host-validate
  • Edit /etc/libvirt/libvirtd.conf with the following values:
    • unix_sock_group = "libvirt"
    • unix_sock_rw_perms = "0770"
  • Restart libvirtd:
    • sudo systemctl restart libvirtd
  • Choose an unprivileged account to use with Minikube, I’ll use dan:
    • sudo usermod -aG libvirt dan
  • Run Minikube with the kvm2 driver:
    • minikube start --driver=kvm2
  • Run minikube status to see how we did, my output looks like this:

[dan@r2d2 ~]$ minikube status
minikube
type: Control Plane
host: Running
kubelet: Running
apiserver: Running
kubeconfig: Configured
timeToStop: Nonexistent

The kubectl command will provide your primary interface to Minikube. I received a ‘command not found’ type error the first time I tried it after this install. It turns out the command was buried way down in my ~/.minikube directory so I just created a link to it in a directory on my $PATH.

  • ln -s /home/dan/.minikube/cache/linux/v1.20.0/kubectl /home/dan/.local/bin/kubectl

Good output from the kubectl version will confirm success.

Cheers, dcd

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