[03/36] 2-1. 쿠버네티스 설치 / 설치없이 웹에서 실습하기

[따배쿠] 2-1. 쿠버네티스 설치 / 설치없이 웹에서 실습하기

https://www.youtube.com/playlist?list=PLApuRlvrZKohaBHvXAOhUD-RxD0uQ3z0c
  • Category : 따배쿠
  • Tag : 따배쿠

수업내용

Part 1. 쿠버네티스 시작하기

  1. 쿠버네티스 소개
  2. 쿠버네티스 설치하기
  3. 쿠버네티스로 컨테이너 실행하기

    Part 2. 쿠버네티스 기본 개념

  4. 쿠버네티스 아키텍처
  5. 파드
  6. 컨트롤러
  7. 서비스
  8. 인그레스
  9. 레이블과 애너테이션
  10. 컨피그맵
  11. 시크릿

    Part 3. 쿠버네티스 한 걸음 더 들어가기

  12. 파드 스케쥴링
  13. 인증과 권한관리
  14. 데이터 저장
  15. 클러스터 네트워킹 구성
  16. 쿠버네티스 DNS
  17. 로깅과 모니터링
  18. 오토스케일링
  19. 사용자 정의 자원
  20. 쿠버네티스 기반으로 워드프레스 앱 실행하기
  21. 헬름

쿠버네티스 설치하기

설치없이 쿠버네티스 사용하기

  • 카타코다 쿠버네티스 플레이그라운드
    • https://www.katacoda.com/courses/kubernetes/playground [폐쇄됨]
    • Master, node1이 구성되어 있어 바로 사용가능
  • Play with Kubernetes
    • docker에서 제공. docker hub 계정으로 로그인
    • https://labs.play-with-k8s.com/
    • 4시간 사용 가능. Master, worker Node를 직접 구성한 후 사용가능

실습환경 : Docker Playground

복사 : ctrl + ins

붙여넣기 : shift + ins

  1. Initializes cluster master node: 
    kubeadm init --apiserver-advertise-address $(hostname -i) --pod-network-cidr 10.5.0.0/16
  2. Initialize cluster networking: 
    kubectl apply -f https://raw.githubusercontent.com/cloudnativelabs/kube-router/master/daemonset/kubeadm-kuberouter.yaml
  3. (Optional) Create an nginx deployment: 
    kubectl apply -f https://raw.githubusercontent.com/kubernetes/website/master/content/en/examples/application/nginx-app.yaml
  1. ADD NEW INSTANCE 후 MASTER NODE(node1)에서 초기화 작업 진행 
    kubeadm init --apiserver-advertise-address $(hostname -i) --pod-network-cidr 10.5.0.0/16
    • RESULT 화면 
      [node1 ~]$ kubeadm init --apiserver-advertise-address $(hostname -i) --pod-network-cidr 10.5.0.0/16
Initializing machine ID from random generator.
I0121 13:13:31.032254     625 version.go:251] remote version is much newer: v1.26.1; falling back to: stable-1.20
[init] Using Kubernetes version: v1.20.15
[preflight] Running pre-flight checks
   [WARNING Service-Docker]: docker service is not active, please run 'systemctl start docker.service'
   [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
   [WARNING FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist
[preflight] The system verification failed. Printing the output from the verification:
KERNEL_VERSION: 4.4.0-210-generic
DOCKER_VERSION: 20.10.1
OS: Linux
CGROUPS_CPU: enabled
CGROUPS_CPUACCT: enabled
CGROUPS_CPUSET: enabled
CGROUPS_DEVICES: enabled
CGROUPS_FREEZER: enabled
CGROUPS_MEMORY: enabled
CGROUPS_PIDS: enabled
CGROUPS_HUGETLB: enabled
  2. node1 에서 해당 명령어 복사 
    kubeadm join 192.168.0.8:6443 --token p80jz1.f0xe2tf37y9s701v \
 --discovery-token-ca-cert-hash sha256:c76cbac49cd7be3b2fe9fea539e591c940f3cbc1c4326b76a7234fa052c662ce
    • RESULT 화면 
      [node2 ~]$ kubeadm join 192.168.0.8:6443 --token p80jz1.f0xe2tf37y9s701v \
>     --discovery-token-ca-cert-hash sha256:c76cbac49cd7be3b2fe9fea539e591c940f3cbc1c4326b76a7234fa052c662ce
Initializing machine ID from random generator.
[preflight] Running pre-flight checks
   [WARNING Service-Docker]: docker service is not active, please run 'systemctl start docker.service'
   [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
   [WARNING FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist
[preflight] The system verification failed. Printing the output from the verification:
KERNEL_VERSION: 4.4.0-210-generic
DOCKER_VERSION: 20.10.1
OS: Linux
CGROUPS_CPU: enabled
CGROUPS_CPUACCT: enabled
CGROUPS_CPUSET: enabled
CGROUPS_DEVICES: enabled
CGROUPS_FREEZER: enabled
CGROUPS_MEMORY: enabled
CGROUPS_PIDS: enabled
CGROUPS_HUGETLB: enabled
  3. 노드2 생성 후 노드1에서 복사한 명령어 실행 
    kubeadm join 192.168.0.8:6443 --token p80jz1.f0xe2tf37y9s701v \
 --discovery-token-ca-cert-hash sha256:c76cbac49cd7be3b2fe9fea539e591c940f3cbc1c4326b76a7234fa052c662ce
    • RESULT 화면 
      [node2 ~]$ kubeadm join 192.168.0.8:6443 --token p80jz1.f0xe2tf37y9s701v \
>     --discovery-token-ca-cert-hash sha256:c76cbac49cd7be3b2fe9fea539e591c940f3cbc1c4326b76a7234fa052c662ce
Initializing machine ID from random generator.
[preflight] Running pre-flight checks
   [WARNING Service-Docker]: docker service is not active, please run 'systemctl start docker.service'
   [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
   [WARNING FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist
[preflight] The system verification failed. Printing the output from the verification:
KERNEL_VERSION: 4.4.0-210-generic
DOCKER_VERSION: 20.10.1
OS: Linux
CGROUPS_CPU: enabled
CGROUPS_CPUACCT: enabled
CGROUPS_CPUSET: enabled
CGROUPS_DEVICES: enabled
CGROUPS_FREEZER: enabled
CGROUPS_MEMORY: enabled
CGROUPS_PIDS: enabled
CGROUPS_HUGETLB: enabled
  4. Node1 정보 보기 
    kubectl get nodes -o wide
    • RESULT 화면 
      [node1 ~]$ kubectl get nodes -o wide
NAME    STATUS     ROLES                  AGE    VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE                KERNEL-VERSION      CONTAINER-RUNTIME
node1   NotReady   control-plane,master   4m2s   v1.20.1   192.168.0.8   <none>        CentOS Linux 7 (Core)   4.4.0-210-generic   docker://20.10.1
node2   NotReady   <none>                 87s    v1.20.1   192.168.0.7   <none>        CentOS Linux 7 (Core)   4.4.0-210-generic   docker://20.10.1
  • 전체 지우기 Ctrl+L
  • 클라우드 서비스에서 제공하는 쿠버네티스 도구
    • 구글 쿠버네티스 엔진(GKE)
    • 아마존 쿠버네티스 일래스틱 컨테이너 서비스(EKS)
    • 애저 쿠버네티스 서비스(AKS)

Share this post

김민서's photo

By

The BlackCode got Dream