join.sh의 내용이 없으며 localhost:8080 was refused 에러가 뜹니다.

Question

Kubernetes Cluster 설치 v1.22를보고 설치 하였는데, 설치 후 master node에 join하는 과정에서 join.sh파일은 생서되었으나 내용물이 없고, kubectl명령어를 써보면 The connection to the server localhost:8080 was refused - did you specify the right host or port? 에러가 뜹니다. 신속하게 해결 하고 싶은데 답변 부탁드립니다. 참고로 vagrant up 실행시 아래와 같은 에러가 발생됩니다 ==> k8s-master: Running provisioner: shell... k8s-master: Running: inline script k8s-master: I0329 11:04:29.670608 14429 version.go:255] remote version is much newer: v1.26.3; falling back to: stable-1.22 k8s-master: [init] Using Kubernetes version: v1.22.17 k8s-master: [preflight] Running pre-flight checks k8s-master: [preflight] WARNING: Couldn't create the interface used for talking to the container runtime: docker is required for container runtime: exec: "docker": executable file not found in $PATH k8s-master: error execution phase preflight: [preflight] Some fatal errors occurred: k8s-master: [ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist k8s-master: [ERROR FileContent--proc-sys-net-ipv4-ip_forward]: /proc/sys/net/ipv4/ip_forward contents are not set to 1 k8s-master: [preflight] If you know what you are doing, you can make a check non-fatal with --ignore-preflight-errors=... k8s-master: To see the stack trace of this error execute with --v=5 or higher k8s-master: failed to load admin kubeconfig: open /root/.kube/config: no such file or directory k8s-master: To see the stack trace of this error execute with --v=5 or higher k8s-master: cp: cannot stat ‘/etc/kubernetes/admin.conf’: No such file or directory k8s-master: chown: cannot access ‘/root/.kube/config’: No such file or directory

일프로 · Answer

안녕하세요. 다운받은 Vagrantfile 스크립트를 열어서 내용을 보면 아래와 같은 내용이 있는데, # Iptables 커널 옵션 활성화 cat < /etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 EOF sysctl --system # permissive 모드로 SELinux 설정(효과적으로 비활성화) 아래 내용 추가 부분 넣어서 다시 해보시겠어요? Iptables 커널 옵션 활성화 부분이 설치 중에 잘 안 먹힐 경우 나올 수 있는 에러입니다. # Iptables 커널 옵션 활성화 cat < /etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 EOF sysctl --system ################# 내용 추가 #################### modprobe br_netfilter echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables ################################################ # permissive 모드로 SELinux 설정(효과적으로 비활성화)