K8s安装部署--超级详细（无坑，v1.23）

# 关闭防火墙并且设置开机不启动
systemctl stop firewalld
systemctl disable firewalld
# 关闭seLinux，getenforce是获取seLinux的状态
# 没有设置过seLinux一般getenforce查询结果为Enforcing，需设置为disable关闭
getenforce
# 直接修改文件，改为SELINUX=disabled，重启之后生效
vim /etc/selinux/config
# 清除iptables规则
iptables -F

# 临时关闭
swapoff -a
# 修改/etc/fstab文件永久关闭，将文件中/dev/mapper/centos-swap swap行注释即可，也可以直接运行下面这条命令
sed -i '/swap/ s/^\(.*\)$/#\1/g' /etc/fstab

cat <<EOF >> /etc/sysctl.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_nonlocal_bind = 1
net.ipv4.ip_forward = 1
vm.swappiness=0
EOF

# 重新加载系统参数配置，让上面的修改生效
sysctl -p

#安装工具包
yum install -y yum-utils
#可以使用阿里云镜像替换官方源
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

# 指定版本安装docker
yum install -y docker-ce-19.03.9 docker-ce-cli-19.03.9 containerd.io

# 开启docker服务
systemctl start docker
# 设置开机启动
systemctl enable docker


# 配置Docker使用systemd作为默认Cgroup驱动，配置之后需要重启docker
cat <<EOF > /etc/docker/daemon.json
{
    "registry-mirrors": [
        "http://hub-mirror.c.163.com",
        "https://docker.mirrors.ustc.edu.cn",
        "https://registry.docker-cn.com"
    ],
    "exec-opts": ["native.cgroupdriver=systemd"]
}
EOF

#重启docker
systemctl restart docker

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 install -y kubelet-1.23.0 kubeadm-1.23.0 kubectl-1.23.0

systemctl enable kubelet

# 拉取镜像
docker pull coredns/coredns:1.8.4

# 将镜像改名
docker tag coredns/coredns:1.8.4 registry.aliyuncs.com/google_containers/coredns:v1.8.4

# 记得改变IP，只要改第一行的IP地址，一般改为master节点地址
kubeadm init \
--apiserver-advertise-address=192.168.*.* \
--image-repository registry.aliyuncs.com/google_containers \
--service-cidr=10.1.0.0/16 \
--pod-network-cidr=10.244.0.0/16
#--pod-network-cidr=192.168.0.0/16

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