创建一个工作目录
后面操作进入该工作目录进行
[root@master ~]# mkdir etcd-ssl
安装cfssl工具
该工具用于自动生成证书
cd /root/etcd-ssl
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.0/cfssl_1.6.0_linux_amd64 -O cfssl
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.0/cfssljson_1.6.0_linux_amd64 -O cfssljson
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.0/cfssl-certinfo_1.6.0_linux_amd64 -O cfssl-certinfo
chmod +x cfssl*
mv cfssl* /usr/local/bin/
chmod +x cfssl*
mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/local/bin/cfssl-certinfo
创建ca证书请求文件
cat > ca-csr.json
