kubeadm init시 connection refuse에러

환경은 AWS 환경이며, 실습환경과 똑같은 아이피로 해서

centos 7으로 동일하게 구성하고 있습니다(제 커널버전은 Linux 3.10.0-1160.76.1.el7.x86_64)

그런데 마지막에 kubeadm init 하는데 connection refused 이 뜨며 진행이 되지 않습니다.

해당 에러 발생시 daemon.json을 확인하라는 내용이 있던데(구글링시) 이상이 없었습니다.

아래는 전체로그 입니다.

회신 주시면 감사드리겠습니다.

[root@k8s-master centos]# kubeadm init --pod-network-cidr=20.96.0.0/12 --apiserver-advertise-address=192.168.0.30

I0827 06:11:16.046030 2520 version.go:248] remote version is much newer: v1.25.0; falling back to: stable-1.15

[init] Using Kubernetes version: v1.15.12

[preflight] Running pre-flight checks

[WARNING SystemVerification]: this Docker version is not on the list of validated versions: 20.10.17. Latest validated version: 18.09

[preflight] Pulling images required for setting up a Kubernetes cluster

[preflight] This might take a minute or two, depending on the speed of your internet connection

[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'

[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"

[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"

[kubelet-start] Activating the kubelet service

[certs] Using certificateDir folder "/etc/kubernetes/pki"

[certs] Generating "etcd/ca" certificate and key

[certs] Generating "etcd/server" certificate and key

[certs] etcd/server serving cert is signed for DNS names [k8s-master localhost] and IPs [192.168.0.30 127.0.0.1 ::1]

[certs] Generating "etcd/healthcheck-client" certificate and key

[certs] Generating "apiserver-etcd-client" certificate and key

[certs] Generating "etcd/peer" certificate and key

[certs] etcd/peer serving cert is signed for DNS names [k8s-master localhost] and IPs [192.168.0.30 127.0.0.1 ::1]

[certs] Generating "ca" certificate and key

[certs] Generating "apiserver" certificate and key

[certs] apiserver serving cert is signed for DNS names [k8s-master kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 192.168.0.30]

[certs] Generating "apiserver-kubelet-client" certificate and key

[certs] Generating "front-proxy-ca" certificate and key

[certs] Generating "front-proxy-client" certificate and key

[certs] Generating "sa" key and public key

[kubeconfig] Using kubeconfig folder "/etc/kubernetes"

[kubeconfig] Writing "admin.conf" kubeconfig file

[kubeconfig] Writing "kubelet.conf" kubeconfig file

[kubeconfig] Writing "controller-manager.conf" kubeconfig file

[kubeconfig] Writing "scheduler.conf" kubeconfig file

[control-plane] Using manifest folder "/etc/kubernetes/manifests"

[control-plane] Creating static Pod manifest for "kube-apiserver"

[control-plane] Creating static Pod manifest for "kube-controller-manager"

[control-plane] Creating static Pod manifest for "kube-scheduler"

[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"

[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s

[kubelet-check] Initial timeout of 40s passed.

[kubelet-check] It seems like the kubelet isn't running or healthy.

[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get http://localhost:10248/healthz: dial tcp [::1]:10248: connect: connection refused.

[kubelet-check] It seems like the kubelet isn't running or healthy.

[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get http://localhost:10248/healthz: dial tcp [::1]:10248: connect: connection refused.

[kubelet-check] It seems like the kubelet isn't running or healthy.

[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get http://localhost:10248/healthz: dial tcp [::1]:10248: connect: connection refused.