一，kubeadm初始化k8s集群

docker安装

wget    https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/docker-ce.repo

yum install -y docker-ce

systemctl start docker
systemctl enable docker

一：配置hosts文件

cat /etc/hosts

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.0.3 xiaolizi

二：配置内核参数

创建/etc/sysctl.d/k8s.conf文件，添加如下内容：

net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1

执行命令使修改生效。

sysctl -p /etc/sysctl.d/k8s.conf

三：关闭防火墙和selinux

systemctl stop firewalld && systemctl disable firewalld

setenforce 0

sed -i 's/^SELINUX=enforcing$/SELINUX=disabled/' /etc/selinux/config && setenforce 0

四：配置k8s仓库

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

五：安装kubelet

yum install -y kubelet kubeadm kubectl
systemctl enable kubelet && systemctl start kubelet

六：初始化

kubeadm init --apiserver-advertise-address=192.168.0.3 --image-repository registry.aliyuncs.com/google_containers
--kubernetes-version v1.17.0 --pod-network-cidr=192.168.0.0/16

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

kubectl taint nodes --all node-role.kubernetes.io/master-

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/2140ac876ef134e0ed5af15c65e414cf26827915/Documentation/kube-flannel.yml

七：查看