Minikubeとは

Minikubeでは仮想化ソフトウェアを使ってLinuxがインストールされた仮想マシンを作成し、そこでKubernetesクラスタを動作させることができるツールです。

環境構築

事前準備

CPUの仮想化機能を有効する。

Minikubeをインストール

# Minikubeをインストール
$ brew cask install minikube
Updating Homebrew...
==> Auto-updated Homebrew!
Updated 4 taps (homebrew/core, homebrew/cask, caskroom/versions and caskroom/cask).
==> New Formulae
frps                                                                                                   ospray
==> Updated Formulae
node ✔         coffeescript   flow           gnu-getopt     hyperscan      jid            libdazzle      open-mpi       postgis        simple-scan    typescript     util-linux     xcodegen
apache-flink   ethereum       glm            gomplate       imagemagick    jmeter         lumo           pgcli          riff           svgo           ungit          vim
cmark          faas-cli       glooctl        gtk+3          ipv6calc       kubecfg        mesa           pixman         rust           tbb            unrar          wtf

==> Satisfying dependencies
All Formula dependencies satisfied.
==> Downloading https://storage.googleapis.com/minikube/releases/v1.0.0/minikube-darwin-amd64
######################################################################## 100.0%
==> Verifying SHA-256 checksum for Cask 'minikube'.
==> Installing Cask minikube
==> Linking Binary 'minikube-darwin-amd64' to '/usr/local/bin/minikube'.
🍺  minikube was successfully installed!

# バージョンを確認
$ minikube version
minikube version: v1.0.0

# Kubectlをインストール
$ brew instal kubernetes-cli
==> Downloading https://homebrew.bintray.com/bottles/kubernetes-cli-1.14.0.mojave.bottle.tar.gz
Already downloaded: /Users/gekal/Library/Caches/Homebrew/downloads/878e8c574c331ba1da58211aee9706d791978fc28007672d7c46118f33271bdc--kubernetes-cli-1.14.0.mojave.bottle.tar.gz
==> Pouring kubernetes-cli-1.14.0.mojave.bottle.tar.gz
==> Caveats
Bash completion has been installed to:
  /usr/local/etc/bash_completion.d

zsh completions have been installed to:
  /usr/local/share/zsh/site-functions
==> Summary

Minikubeを開始

$ minikube start
😄  minikube v1.0.0 on darwin (amd64)
🤹  Downloading Kubernetes v1.14.0 images in the background ...
🔥  Creating virtualbox VM (CPUs=2, Memory=2048MB, Disk=20000MB) ...
💿  Downloading Minikube ISO ...
 142.88 MB / 142.88 MB [============================================] 100.00% 0s
📶  "minikube" IP address is 192.168.99.100
🐳  Configuring Docker as the container runtime ...
🐳  Version of container runtime is 18.06.2-ce
⌛  Waiting for image downloads to complete ...
✨  Preparing Kubernetes environment ...
💾  Downloading kubelet v1.14.0
💾  Downloading kubeadm v1.14.0
🚜  Pulling images required by Kubernetes v1.14.0 ...
🚀  Launching Kubernetes v1.14.0 using kubeadm ...
⌛  Waiting for pods: apiserver proxy etcd scheduler controller dns
🔑  Configuring cluster permissions ...
🤔  Verifying component health .....
💗  kubectl is now configured to use "minikube"
🏄  Done! Thank you for using minikube!

Minikubeのステータスを確認

  1. Minikubeコマンド

     $ minikube status
     host: Running
     kubelet: Running
     apiserver: Running
     kubectl: Correctly Configured: pointing to minikube-vm at 192.168.99.100
    
  2. kubectlコマンド

     $ kubectl get nodes
     NAME       STATUS   ROLES    AGE   VERSION
     minikube   Ready    master   50m   v1.14.0
    
  3. VirtualBox

    minikube virtualbox

    ネットワーク

    1. NAT
    2. ホストオンリー
  4. minikube dashboard

     $ minikube dashboard
     🔌  Enabling dashboard ...
     🤔  Verifying dashboard health ...
     🚀  Launching proxy ...
     🤔  Verifying proxy health ...
     🎉  Opening http://127.0.0.1:59308/api/v1/namespaces/kube-system/services/http:kubernetes-dashboard:/proxy/ in your default browser...
    

    minikube dashboard

Minikubeコマンド

command detail
addons Modify minikube’s kubernetes addons
cache Add or delete an image from the local cache.
completion Outputs minikube shell completion for the given shell (bash or zsh)
config Modify minikube config
dashboard Access the kubernetes dashboard running within the minikube cluster
delete Deletes a local kubernetes cluster
docker-env Sets up docker env variables; similar to ‘$(docker-machine env)’
help Help about any command
ip Retrieves the IP address of the running cluster
logs Gets the logs of the running instance, used for debugging minikube, not user code
mount Mounts the specified directory into minikube
profile Profile sets the current minikube profile
service Gets the kubernetes URL(s) for the specified service in your local cluster
ssh Log into or run a command on a machine with SSH; similar to ‘docker-machine ssh’
ssh-key Retrieve the ssh identity key path of the specified cluster
start Starts a local kubernetes cluster
status Gets the status of a local kubernetes cluster
stop Stops a running local kubernetes cluster
tunnel tunnel makes services of type LoadBalancer accessible on localhost
update-check Print current and latest version number
update-context Verify the IP address of the running cluster in kubeconfig.
version Print the version of minikube

よく利用するコマンド

  1. start

    minikubeを起動する。

    option detail
    –cpus int Number of CPUs allocated to the minikube VM (default 2)
    –memory int Amount of RAM allocated to the minikube VM in MB (default 2048)
    –vm-driver string VM driver is one of: [virtualbox parallels vmwarefusion kvm xhyve hyperv hyperkit kvm2 vmware none] (default “virtualbox”)
  2. status

    minikubeのステータスを確認する。

  3. stop

    minikubeを停止する。

  4. delete

    nimikubeのクラスタを削除する。

まとめ

v1.0.0にバージョンアップしたため、前より使えやすくになりました。

参照

  1. minikube
  2. Install Minikube