[Kubernetes] 개요

개요

• https://kubernetes.io/ko/docs/home/
• 배포, 스케일링, 그리고 컨테이너화된 애플리케이션의 관리를 자동화 해주는 오픈 소스 컨테이너 오케스트레이션 엔진

설치

• 환경
  • OS
    • CentOS Stream 9
  • master node ip
    • 1.1.1.1, 2.2.2.2, 3.3.3.3
  • worker node ip
    • 4.4.4.4, 5.5.5.5
  • 1.1.1.1에서 설치 작업을 수행하는 것으로 가정
• 모든 노드에 대해 호스트 네임 설정
  • 1.1.1.1 접속 후 hostnamectl set-hostname master-node-01 수행
  • 2.2.2.2 접속 후 hostnamectl set-hostname master-node-02 수행
  • 3.3.3.3 접속 후 hostnamectl set-hostname master-node-03 수행
  • 4.4.4.4 접속 후 hostnamectl set-hostname worker-node-01 수행
  • 5.5.5.5 접속 후 hostnamectl set-hostname worker-node-02 수행
• ssh key 생성 및 모든 노드에 복사
  • ssh-keygen -t rsa
  • ssh-copy-id root@1.1.1.1
  • ssh-copy-id root@2.2.2.2
  • ssh-copy-id root@3.3.3.3
  • ssh-copy-id root@4.4.4.4
  • ssh-copy-id root@5.5.5.5
• kubespray
  • git clone https://github.com/kubernetes-sigs/kubespray.git
  • cd ./kubespray
  • dnf install python-pip
  • pip install -r requirements.txt
  • cp -rfp inventory/sample inventory/mycluster
  • declare -a IPS=(1.1.1.1 2.2.2.2 3.3.3.3 4.4.4.4 5.5.5.5)
  • CONFIG_FILE=inventory/mycluster/hosts.yaml python3 contrib/inventory_builder/inventory.py ${IPS[@]}
  • vim inventory/mycluster/hosts.yaml

     all:
     hosts:
       master-node-01:
         ansible_host: 1.1.1.1
         ip: 1.1.1.1
         access_ip: 1.1.1.1
       master-node-02:
         ansible_host: 2.2.2.2
         ip: 2.2.2.2
         access_ip: 2.2.2.2
       master-node-03:
         ansible_host: 3.3.3.3
         ip: 3.3.3.3
         access_ip: 3.3.3.3
       worker-node-01:
         ansible_host: 4.4.4.4
         ip: 4.4.4.4
         access_ip: 4.4.4.4
       worker-node-02:
         ansible_host: 5.5.5.5
         ip: 5.5.5.5
         access_ip: 5.5.5.5
     children:
       kube_control_plane:
         hosts:
           master-node-01:
           master-node-02:
           master-node-03:
       kube_node:
         hosts:
           worker-node-01:
           worker-node-02:
       etcd:
         hosts:
           master-node-01:
           master-node-02:
           master-node-03:
       k8s_cluster:
         children:
           kube_control_plane:
           kube_node:
       calico_rr:
         hosts: {}
    

  • ansible-playbook -i inventory/mycluster/hosts.yaml --become --become-user=root cluster.yml

삭제

• cd ./kubespray
• ansible-playbook -i inventory/mycluster/hosts.yaml --become --become-user=root reset.yml