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TroubleShooting

 Warning  FailedCreatePodSandBox  2m (x177 over 7m)  kubelet, test-kube-node001-ncl  (combined from similar events): Failed create pod sandbox: rpc error: code = Unknown desc = failed to set up sandbox container "62ea9854582bbdb08c8b29af9da2499f5146facee60440ee65cb440f47b36c89" network for pod "dst-server-688766c9d5-2m8vl": NetworkPlugin cni failed to set up pod "dst-server-688766c9d5-2m8vl_zepeto" network: failed to set bridge addr: "cni0" already has an IP address different from 10.244.1.1/24

그 외에...

#!/bin/bash

# Check permission

if [ "$EUID" -ne 0 ]

  then echo "Please run as root (SUDO)"

  exit

fi

# update yum

sudo yum update -y

# Stop Firewalld

sudo systemctl stop firewalld

sudo systemctl disable firewalld

# uninstall old version docker

sudo yum remove -y docker \

docker-client \

docker-client-latest \

docker-common \

docker-latest \

docker-latest-logrotate \

docker-logrotate \

docker-selinux \

docker-engine-selinux \

docker-engine

# SETUP THE REPOSITORY

## Install Required Packages

sudo yum install -y yum-utils \

device-mapper-persistent-data \

lvm2

## Setup Repository

sudo yum-config-manager \

--add-repo \

https://download.docker.com/linux/centos/docker-ce.repo

# Install Docker

sudo yum install -y docker-ce

# Start Docker

sudo systemctl start docker

sudo systemctl enable docker

# Add User To Docker Group

sudo /sbin/usermod -aG docker $USER

# INSTALL KUBERNETES

sudo bash -c 'cat <<EOF > /etc/yum.repos.d/kubernetes.repo

[kubernetes]

name=Kubernetes

baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64

enabled=1

gpgcheck=1

repo_gpgcheck=1

gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg

exclude=kube*

EOF'

# Disable Security Linux

sudo /sbin/setenforce 0

# Disable SWAP

sudo /sbin/swapoff -a

# Set IP Forward

echo 1 > sudo /proc/sys/net/ipv4/ip_forward

# Network Setting

sudo bash -c 'cat <<EOF > /etc/sysctl.d/k8s.conf

net.bridge.bridge-nf-call-ip6tables = 1

net.bridge.bridge-nf-call-iptables = 1

EOF'

sudo sysctl --system

# Install Kubernetes

sudo yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes

# Start kubelet

sudo systemctl daemon-reload

sudo systemctl restart kubelet

sudo systemctl enable kubelet

#!/bin/bash

# Check permission

if [ "$EUID" -ne 0 ]

  then echo "Please run as root (SUDO)"

  exit

fi

# Setting Environment

sudo echo 1 > /proc/sys/net/ipv4/ip_forward

# kubeadm init --pod-network-cidr 10.244.0.0/16

sudo kubeadm init --pod-network-cidr 192.168.0.0/16

sudo export KUBECONFIG=/etc/kubernetes/admin.conf

mkdir -p $HOME/.kube

sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

sudo chown $(id -u):$(id -g) $HOME/.kube/config

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/v0.10.0/Documentation/kube-flannel.yml

kubectl get pods --all-namespaces

kubeadm reset

systemctl stop kubelet

systemctl stop docker

rm -rf /var/lib/cni/

rm -rf /var/lib/kubelet/*

rm -rf /run/flannel

rm -rf /etc/cni/

rm -rf /etc/kubernetes

rm -rf /var/lib/etcd/

ip link delete cni0

ip link delete flannel.1

yum remove -y kubelet

yum remove -y kubectl

yum remove -y kubeadm

systemctl start docker