安装前的准备

1. 原文地址https://note.so1234.top

2. 查看python版本(要求版本大于2.7.0)

   python -V

3. 如果python版本低于2.7.0建议不要随意更新python，会影响yum的正常使用

4. 安装库支持

   yum install yum-utils -y
   
   yum-config-manager \
   --enable \
   rhui-REGION-rhel-server-extras \
   rhui-REGION-rhel-server-optional \

5. 安装certbot-nginx

   cd /root
   wget https://dl.eff.org/certbot-auto
   cp /root/certbot-auto /usr/local/bin/
   chmod -R 755 /usr/local/bin/certbot-auto

6. 生成证书(*.xxx.com为通配符域名)

   certbot-auto --server https://acme-v02.api.letsencrypt.org/directory -d "*.xxx.com" -d "xxx.com" --manual --preferred-challenges dns-01 certonly
   # 1.执行过程中输入邮箱
   # 2.执行过程中输入A同意
   # 3.执行过程中输入Y确认
   # 4.执行过程中输入Y确认
   # 5.执行过程中添加DNS的TXT解析记录,以阿里云DNS为例
       # 1.记录类型TXT
       # 1.主机记录_xxx-xxx.xxx.com
       # 1.解析线路默认
       # 1.记录值xxxxxx
       # 1.TTL 10分钟
   # 6.按下回车,提示成功！

7. 按照成功后的提示，记下证书文件的路径，提示信息类似如下

   IMPORTANT NOTES:
    - Congratulations! Your certificate and chain have been saved at:
      /etc/letsencrypt/live/xxx.com/fullchain.pem
      Your key file has been saved at:
      /etc/letsencrypt/live/xxx.com/privkey.pem
      Your cert will expire on 2xxx-xx-xx. To obtain a new or tweaked
      version of this certificate in the future, simply run certbot-auto
      again. To non-interactively renew *all* of your certificates, run
      "certbot-auto renew"
    - If you like Certbot, please consider supporting our work by:
      Donating to ISRG / Let's Encrypt:   https://letsencrypt.org/donate
      Donating to EFF:                    https://eff.org/donate-le
   
   # 生成的文件放在：
   /etc/letsencrypt/live/xxx.com/fullchain.pem
   /etc/letsencrypt/live/xxx.com/privkey.pem
   # 该证书到期的时间是
   2xxx-xx-xx
   # 所以要设置自动更新证书

8. 自动更新

   # 测试是否支持自动更新
   certbot-auto renew --dry-run
   # 使用自动更新
   certbot-auto renew
   # 在crontab配置：每5天尝试自动更新(频率小于90天即可)
   crontab -e
   0 0 */5 * * root -c certbot-auto renew
   ESC
   :wq

9. 配置nginx
10. 完成
11. 领支付宝红包支持作者