网站安全锁-SSL证书

安装Certbot客户端

Certbot是一个EPEL安装包，如果没有配置EPEL库，需要提前将库配置好。

运行以下命令安装Certbot:

$ sudo yum install certbot-nginx

 

2.使用Certbot生成证书

$ sudo certbot --authenticator standalone --installer nginx --pre-hook "nginx -s stop" --post-hook "nginx"

生成过程中需要输入域名，域名要提前进行解析。

 

3.修改nginx配置

certbot会在/etc/letsencrypt/live/目录下生成一个域名的目录，然后修改对应的nginx的配置。

ssl_certificate "/etc/letsencrypt/live/{域名}/fullchain.pem";
ssl_certificate_key "/etc/letsencrypt/live/{域名}/privkey.pem";

 

4.如何让证书永久免费呢？

Let‘s Encrypt证书有效期为90天，为了保证在过期前更新证书，Certbot提供了更新证书有效期的功能。使用以下功能可以进行更新：

$ sudo certbot renew --dry-run

也可以使用crontab自动更新证书有效期。

0 0,12 * * * python -c ‘import random; import time; time.sleep(random.random() * 3600)‘ && certbot renew

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常见问题：

1.  生成证书的时候报错

Traceback (most recent call last):
File "/bin/certbot", line 9, in <module>
load_entry_point(‘certbot==1.6.0‘, ‘console_scripts‘, ‘certbot‘)()
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 489, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2852, in load_entry_point
return ep.load()
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2443, in load
return self.resolve()
File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2449, in resolve
module = __import__(self.module_name, fromlist=[‘__name__‘], level=0)
File "/usr/lib/python2.7/site-packages/certbot/main.py", line 2, in <module>
from certbot._internal import main as internal_main
File "/usr/lib/python2.7/site-packages/certbot/_internal/main.py", line 20, in <module>
from certbot._internal import account
File "/usr/lib/python2.7/site-packages/certbot/_internal/account.py", line 18, in <module>
from acme.client import ClientBase # pylint: disable=unused-import
File "/usr/lib/python2.7/site-packages/acme/client.py", line 39, in <module>
requests.packages.urllib3.contrib.pyopenssl.inject_into_urllib3() # type: ignore
File "/usr/lib/python2.7/site-packages/urllib3/contrib/pyopenssl.py", line 118, in inject_into_urllib3
_validate_dependencies_met()
File "/usr/lib/python2.7/site-packages/urllib3/contrib/pyopenssl.py", line 160, in _validate_dependencies_met
"‘pyOpenSSL‘ module missing required functionality. "
ImportError: ‘pyOpenSSL‘ module missing required functionality. Try upgrading to v0.14 or newer.

解决：

pip install --upgrade --force-reinstall ‘requests==2.6.0‘