安装免费证书

[TOC]

# CentoS 8 安装

## 安装 Enable EPEL

官网地址：https://certbot.eff.org/

```
# yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm

# ARCH=$( /bin/arch )
# subscription-manager repos --enable "codeready-builder-for-rhel-8-${ARCH}-rpms"

# dnf config-manager --set-enabled PowerTools
```

## 安装 Certbot

`dnf install certbot python3-certbot-nginx`

## 运行 Certbot，并且自动配置证书

`certbot --nginx`

运行后效果如下图所示：

![](https://shuxiaoyuan-201812.oss-cn-shanghai.aliyuncs.com/PicGo/20200729154037.png)
![](https://shuxiaoyuan-201812.oss-cn-shanghai.aliyuncs.com/PicGo/20200729154148.png)

## 只需要获取证书，然后自己安装

`certbot certonly --nginx`

## 自动续签

这个证书只有三个月有效期，所有要自动续签，自动续签也很简单，添加定时任务即可

`echo "0 0,12 * * * root python3 -c 'import random; import time; time.sleep(random.random() * 3600)' && certbot renew -q" | sudo tee -a /etc/crontab > /dev/null`

# CentoS 7 安装

## 安装 Enable EPEL

```
# 启用软件源
yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
yum-config-manager repos --enable "rhel-*-optional-rpms" --enable "rhel-*-extras-rpms"  --enable "rhel-ha-for-rhel-*-server-rpms"

# 安装 Certbot for Nginx
yum install certbot python2-certbot-nginx

```

##  运行 Certbot，并且自动配置证书，到这里就 GG 了，哈哈哈

`certbot --nginx`

![](https://shuxiaoyuan-201812.oss-cn-shanghai.aliyuncs.com/PicGo/20200729155603.png)

因为年代久远的问题，Python 包很多不可用了，最好是卸载后重新安装最新的，不介绍

## 备用办法：采用脚本安装

- 获取安装脚本
`wget https://dl.eff.org/certbot-auto`

- 赋予可执行权限
`sudo chmod a+x ./certbot-auto`

- 运行脚本
`./certbot-auto`

运行后如下所示：
会自动将 http 重定向到 HTTPS ，如果不想，自己取消即可

```
Complete!
Creating virtual environment...
Installing Python packages...
Installation succeeded.
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator nginx, Installer nginx
Enter email address (used for urgent renewal and security notices)
 (Enter 'c' to cancel): sxy@shuxiaoyuan.com

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Please read the Terms of Service at
https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf. You must
agree in order to register with the ACME server at
https://acme-v02.api.letsencrypt.org/directory
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(A)gree/(C)ancel: A

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Would you be willing, once your first certificate is successfully issued, to
share your email address with the Electronic Frontier Foundation, a founding
partner of the Let's Encrypt project and the non-profit organization that
develops Certbot? We'd like to send you email about our work encrypting the web,
EFF news, campaigns, and ways to support digital freedom.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(Y)es/(N)o: Y

Which names would you like to activate HTTPS for?
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
1: dev-test.shuxiaoyuan.com
2: yapi.shuxiaoyuan.com
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter 'c' to cancel): 1,2
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for dev-test.shuxiaoyuan.com
http-01 challenge for yapi.shuxiaoyuan.com
Waiting for verification...
Cleaning up challenges
Deploying Certificate to VirtualHost /etc/nginx/conf.d/dev-test.shuxiaoyuan.com.conf
Deploying Certificate to VirtualHost /etc/nginx/conf.d/YApi.shuxiaoyuan.com.conf
Redirecting all traffic on port 80 to ssl in /etc/nginx/conf.d/dev-test.shuxiaoyuan.com.conf
Redirecting all traffic on port 80 to ssl in /etc/nginx/conf.d/YApi.shuxiaoyuan.com.conf

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Congratulations! You have successfully enabled https://dev-test.shuxiaoyuan.com
and https://yapi.shuxiaoyuan.com
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Subscribe to the EFF mailing list (email: sxy@shuxiaoyuan.com).

IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /etc/letsencrypt/live/dev-test.shuxiaoyuan.com/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/dev-test.shuxiaoyuan.com/privkey.pem
   Your cert will expire on 2020-10-19. To obtain a new or tweaked
   version of this certificate in the future, simply run certbot-auto
   again with the "certonly" option. To non-interactively renew *all*
   of your certificates, run "certbot-auto renew"
 - Your account credentials have been saved in your Certbot
   configuration directory at /etc/letsencrypt. You should make a
   secure backup of this folder now. This configuration directory will
   also contain certificates and private keys obtained by Certbot so
   making regular backups of this folder is ideal.
 - 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

```