KUBERNETES _ 클러스터 생성

💻 실습 환경

OS : Linux (Ubuntu 8)
Architecture : x89-64

 

📌 Minikube 설치

minikube 설치

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

 

minikube 실행

$ minikube start
😄  Ubuntu 20.04 의 minikube v1.24.0
👎  Unable to pick a default driver. Here is what was considered, in preference order:
    ▪ docker: Not installed: exec: "docker": executable file not found in $PATH
    ▪ kvm2: Not installed: exec: "virsh": executable file not found in $PATH
    ▪ podman: Not installed: exec: "podman": executable file not found in $PATH
    ▪ vmware: Not installed: exec: "docker-machine-driver-vmware": executable file not found in $PATH
    ▪ virtualbox: Not installed: unable to find VBoxManage in $PATH

❌  Exiting due to DRV_NOT_DETECTED: No possible driver was detected. Try specifying --driver, or see https://minikube.sigs.k8s.io/docs/start/

❌ 에러 발생
  docker가 설치되지 않아 생긴 오류

⭕ 에러 해결
     docker를 설치해주자

$ sudo apt install docker.io
$ sudo usermod -aG docker $USER && newgrp docker

   

 

다시 minikube를 실행

$ minikube start

 > 이제 minikube가 가상머신에서가상 머신에서 돌아가기 시작

 > kubernetes 클러스터가 해당 가상 머신에서 실행됨

 

📌 Kubectl 설치

쿠버 네티스 CLI를 설치

$ curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
$ sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl

 

설치 확인

$ kubectl version --client
Client Version: version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.4", GitCommit:"b695d79d4f967c403a96986f1750a35eb75e75f1", GitTreeState:"clean", BuildDate:"2021-11-17T15:48:33Z", GoVersion:"go1.16.10", Compiler:"gc", Platform:"linux/amd64"}

 

kubectl가 클러스터에 올바르게 접근됐는지 확인

$ kubectl cluster-info
Kubernetes control plane is running at https://192.168.49.2:8443
CoreDNS is running at https://192.168.49.2:8443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

 

호스팅 할 수 있는 모든 노드를 표시

$ kubectl get nodes
NAME       STATUS   ROLES                  AGE     VERSION
minikube   Ready    control-plane,master   6m57s   v1.22.3

  > 노드가 하나뿐이며 상태가 준비돼 있는 것을 알 수 있다
  > App을 배포할 준비가 됨