kubernets，k8s，kubeadm一键脚本生成证书

# 下载生成证书的命令
wget http://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget http://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
wget http://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
chmod +x cfssl-certinfo_linux-amd64 cfssljson_linux-amd64 cfssl_linux-amd64
mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo

# 一键脚本生成证书，注：ip地址根据实际情况进行修改。
vim certificate.sh
cat > ca-config.json < ca-csr.json < server-csr.json < admin-csr.json < kube-proxy-csr.json <