k8s安装

master:

yum upgrade

yum update

ifconfig ens33

cat /sys/class/dmi/id/product_uuid

swapoff -a

vim /etc/fstab

#/dev/mapper/cl-swap swap swap defaults 0 0

vim /etc/sysctl.conf

vm.swappiness = 0

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

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

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

lsmod |grep br_netfilter

modprobe br_netfilter

sysctl -p

systemctl disable firewalld.service && systemctl stop firewalld.service

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

wget -O /etc/yum.repos.d/docker-ce.repo https://download.docker.com/linux/centos/docker-ce.repo

sudo sed -i ‘s+download.docker.com+mirrors.tuna.tsinghua.edu.cn/docker-ce+’ /etc/yum.repos.d/docker-ce.repo

yum makecache

yum install docker-ce-19.03.15

systemctl enable docker

systemctl start docker

cat < /etc/yum.repos.d/kubernetes.repo

[kubernetes]

name=Kubernetes

baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/

enabled=1

gpgcheck=1

repo_gpgcheck=1

gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg

EOF

setenforce 0

cat /etc/selinux/config

disabled - No SELinux policy is loaded.

SELINUX=disabled

yum install kubeadm kubelet kubectl

systemctl enable kubelet.service

kubeadm init --kubernetes-version=v1.21.1 --apiserver-advertise-address 192.168.72.100 --pod-network-cidr 10.244.0.0/16

wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

docker pull quay.io/coreos/flannel:v0.14.0

mkdir -p $HOME/.kube

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

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

kubectl get nodes

kubectl apply -f kube-flannel.yml

[root@k8smaster ~]# kubectl get nodes

NAME STATUS ROLES AGE VERSION

k8smaster Ready control-plane,master 44m v1.21.1

k8snode1 Ready 12m v1.21.1

k8snode2 Ready 11m v1.21.1

--discovery-token-ca-cert-hash sha256:b8a50fb27169d6b2ff3ff24bc9c519a195c3f167bd603381f660a80b3a7f4e40