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准备三台干净的服务器，系统版本： CentOS Linux release 7.9.2009
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| sudo sed -e 's|^mirrorlist=|#mirrorlist=|g' \
-e 's|^#baseurl=http://mirror.centos.org/centos|baseurl=https://mirrors.ustc.edu.cn/centos|g' \
-i.bak \
/etc/yum.repos.d/CentOS-Base.repo
# 更换ustc软件源
yum -y install yum-utils device-mapper-persistent-data lvm2
#
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum makecache fast
#添加阿里云docker源
yum -y install docker-ce python3 python3-pip lrzsz
# 安装docker-ce
systemctl disable firewalld --now #关闭防火墙
sed -i 's/enforcing/disabled/' /etc/selinux/config # 关闭selinux
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添加hosts
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| 172.16.8.10 k8s-master
172.16.8.20 k8s-node1
172.16.8.30 k8s-node2
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| cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
#
sysctl --system # 生效
#时间同步：
yum install ntpdate -y
ntpdate time.windows.com
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配置docker加速
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| cat > /etc/docker/daemon.json <<EOF
{
"registry-mirrors": [
"https://registry.docker-cn.com",
"https://reg-mirror.qiniu.com"]
}
EOF
#添加软件源
cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
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-1.19.0 kubeadm-1.19.0 kubectl-1.19.0
systemctl enable kubelet
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部署master节点
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| kubeadm init \
--apiserver-advertise-address=172.16.8.10 \
--image-repository registry.aliyuncs.com/google_containers \
--kubernetes-version v1.19.0 \
--service-cidr=10.96.0.0/12 \
--pod-network-cidr=10.244.0.0/16 \
--ignore-preflight-errors=all
#
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
kubectl get nodes
# 如果token过期或者遗忘 可重新生成
kubeadm token create
openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex | sed 's/^.* //'
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部署node节点
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| kubeadm join 172.16.8.10:6443 --token yu1d41.14sn0raj2f9upgwe --discovery-token-ca-cert-hash sha256:f4a052579f60e2792f68629bd88d5eb32b2ce0a39228770377ebc880a44ba822
#
#需要安装cni
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部署cni 容器网络
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| wget https://docs.projectcalico.org/manifests/calico.yaml
kubectl apply -f calico.yaml
kubectl get pods -n kube-system
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也可使用flannel
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| kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
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如果要切换cni插件，需要先把所有节点的/etc/cni/net.d/文件清空
验证kubernetes
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| kubectl create deployment nginx --image=nginx
kubectl expose deployment nginx --port=80 --type=NodePort
kubectl get pod,svc
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