使用kubeadm在Centos8上部署kubernetes1.18

// 查看系统版本
cat /etc/centos-release
CentOS Linux release 8.1.1911 (Core)

// 如果系统环境为8.0(云服务器默认最大安装环境为8.0)使用如下命令进行升级操作
sudo dnf update -y

// 配置网络
cat /etc/sysconfig/network-scripts/ifcfg-enp0s3

// 添加阿里源
rm -rfv /etc/yum.repos.d/*
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo

// 配置主机名
cat /etc/hosts

// 关闭swap，注释swap分区
swapoff -a
cat /etc/fstab

// 配置内核参数，将桥接的IPv4流量传递到iptables的链
cat > /etc/sysctl.d/k8s.conf <<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system

// 安装常用包
yum install vim bash-completion net-tools gcc -y

// 使用aliyun源安装docker-ce
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum -y install docker-ce

// 安装docker-ce如果出现以下错
CentOS-8 - Base - mirrors.aliyun.com 14 kB/s | 3.8 kB 00:00
CentOS-8 - Extras - mirrors.aliyun.com 6.4 kB/s | 1.5 kB 00:00
CentOS-8 - AppStream - mirrors.aliyun.com 16 kB/s | 4.3 kB 00:00
Docker CE Stable - x86_64 40 kB/s | 22 kB 00:00
Error:
Problem: package docker-ce-3:19.03.8-3.el7.x86_64 requires containerd.io >= 1.2.2-3, but none of the providers can be installed

• cannot install the best candidate for the job
• package containerd.io-1.2.10-3.2.el7.x86_64 is excluded
• package containerd.io-1.2.13-3.1.el7.x86_64 is excluded
• package containerd.io-1.2.2-3.3.el7.x86_64 is excluded
• package containerd.io-1.2.2-3.el7.x86_64 is excluded
• package containerd.io-1.2.4-3.1.el7.x86_64 is excluded
• package containerd.io-1.2.5-3.1.el7.x86_64 is excluded
• package containerd.io-1.2.6-3.3.el7.x86_64 is excluded
  (try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)

// 解决方法
wget https://download.docker.com/linux/centos/7/x86_64/edge/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm
yum install containerd.io-1.2.6-3.3.el7.x86_64.rpm

// 然后再安装docker-ce即可成功
yum -y install docker-ce

//添加aliyundocker仓库加速器
mkdir -p /etc/docker
tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://fl791z1h.mirror.aliyuncs.com"]
}
EOF
systemctl daemon-reload
systemctl restart docker

// 安装kubectl、kubelet、kubeadm
// 添加阿里kubernetes源
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

// 安装
yum install kubectl kubelet kubeadm
systemctl enable kubelet

// 初始化k8s集群
kubeadm init --kubernetes-version=1.18.0
--apiserver-advertise-address=172.21.0.14
--image-repository registry.aliyuncs.com/google_containers
--service-cidr=10.10.0.0/16 --pod-network-cidr=10.122.0.0/16

// 如果出现错误执行入下命令
kubeadm config images list

// 逐个安装
docker pull daocloud.io/daocloud/kube-apiserver:v1.18.3
docker pull daocloud.io/daocloud/kube-controller-manager:v1.18.3
docker pull daocloud.io/daocloud/kube-scheduler:v1.18.3
docker pull daocloud.io/daocloud/kube-proxy:v1.18.3
docker pull daocloud.io/daocloud/pause:3.2
docker pull daocloud.io/daocloud/etcd:3.4.3-0
docker pull daocloud.io/daocloud/coredns:1.6.7

// 给镜像打tag
docker tag daocloud.io/daocloud/kube-apiserver:v1.18.3 k8s.gcr.io/kube-apiserver:v1.18.3
docker tag daocloud.io/daocloud/kube-controller-manager:v1.18.3 k8s.gcr.io/kube-controller-manager:v1.18.3
docker tag daocloud.io/daocloud/kube-scheduler:v1.18.3 k8s.gcr.io/kube-scheduler:v1.18.3
docker tag daocloud.io/daocloud/kube-proxy:v1.18.3 k8s.gcr.io/kube-proxy:v1.18.3
docker tag daocloud.io/daocloud/pause:3.2 k8s.gcr.io/pause:3.2
docker tag daocloud.io/daocloud/etcd:3.4.3-0 k8s.gcr.io/etcd:3.4.3-0
docker tag daocloud.io/daocloud/coredns:1.6.7 k8s.gcr.io/coredns:1.6.7

// 清理原镜像
docker rmi daocloud.io/daocloud/kube-apiserver:v1.18.3
docker rmi daocloud.io/daocloud/kube-controller-manager:v1.18.3
docker rmi daocloud.io/daocloud/kube-scheduler:v1.18.3
docker rmi daocloud.io/daocloud/kube-proxy:v1.18.3
docker rmi daocloud.io/daocloud/pause:3.2
docker rmi daocloud.io/daocloud/etcd:3.4.3-0
docker rmi daocloud.io/daocloud/coredns:1.6.7