centos安装k8s

1、确保每台机器上有docker
http://get.daocloud.io/#install-docker
2、关闭 每台机器上的swap,selinux

swapoff -a
setenforce 0
sed -i 's/^SELINUX=enforcing$/SELINUX=disable/' /etc/selinux/config

3、注释swap的挂载

vi /etc/fstab
#/dev/mapper/centos-swap swap                    swap    defaults        0 0

4、配置k8s的路由参数

cat <<EOF >  /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF

5、载入配置

sysctl --system

6、部署k8s阿里云源

cat <<EOF > /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
yum update

master节点

1、查看可以安装的版本

yum list kubeadm --showduplicates | sort -r

2、安装并启动

此时启动的kubelet状态为失败，集群初始化后正常

yum install -y kubelet-1.20.1-0 kubeadm-1.20.1-0 kubectl-1.20.1-0 --disableexcludes=kubernetes
systemctl start kubelet
systemctl enable kubelet
kubeadm init --kubernetes-version=1.20.6 --apiserver-advertise-address=192.168.108.19 --image-repository registry.aliyuncs.com/google_containers --pod-network-cidr=10.244.0.0/16 --ignore-preflight-errors=SystemVerification