IT 공부방

1. worker노드 삭제 (master 노드) - kubectl delete node {worker노드 이름} - kubeclt get nodes -o wide // worker노드 확인 2. worker노드 초기화 (worker 노드) - kubeadm reset - rm -rf /etc/kubenetes - rm -rf /etc/cni 2-1 실행중인 컨테이너 전부 삭제 - for i in $(crictl ps -a);do crictl stop $i; done - for i in $(crictl ps -a);do crictl rm $i; done 3. worker노드 조인 control plane노드에서 클러스터 조인 명령어를 생성합니다. - kubeadm token create --print-jo..

CentOS - 사전 설치 yum -y update yum install -y yum-utils # docker repository 시스템 추가 yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo yum-config-manager --enable docker-ce-nightly # docker engine install yum -y install docker-ce docker-ce-cli containerd.io # 서비스 기동 및 등록 systemctl start docker systemctl enable docker # 서비스 확인 systemctl status docker - docker engin..

https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/troubleshooting-kubeadm/ TLS certificate errors The following error indicates a possible certificate mismatch. # kubectl get pods Unable to connect to the server: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "kubernete..

환경 ubuntu : 20.04 LTS CPU : 2core MEM : 2GB 기존 Docker 설치 확인 및 삭제 docker 설치 확인 dpkg -l | grep -i docker docker 삭제 sudo apt-get purge -y docker-engine docker docker.io docker-ce sudo apt-get autoremove -y --purge docker-engine docker docker.io docker-ce sudo apt-get autoremove -y --purge docker* sudo apt-get remove docker docker-engine docker.io containerd runc 모든 이미지, 컨테이너 및 볼륨을 삭제 sudo rm -rf /v..

1. 초기 설정(master/worker node) 2G 이상 메모리 2 CPU core 이상 방화벽 off, 설정 보안그룹 설정(AWS) Swap off (필수) 방화벽 설정 sudo ufw disable Master node Protocol Direction Port Range Purpose Used By TCP Inbound 6443* k8s api server All TCP Inbound 2379 - 2380 etcd server client api kube-apiserver, etcd TCP Inbound 10250 kubelet API Self, Control plane TCP Inbound 10251 kube-schedular Self TCP Inbound 10252 kube-controll..