克隆脚本
sudo git clone https://github.com/diafygi/acme-tiny.git
cd acme-tiny
创建Let's Encrypt私钥
openssl genrsa 4096 > account.key
创建CSR(Certificate Signing Request，证书签名请求) 文件
将需要加密的域名加到下面的代码中，目前一张证书最多可以加密 100 个域名：
openssl genrsa 4096 > domain.key
openssl req -new -sha256 -key domain.key -subj "/" -reqexts SAN -config <(cat /etc/pki/tls/openssl.cnf <(printf "[SAN]\nsubjectAltName=DNS:yoursite.com,DNS:www.yoursite.com")) > domain.csr
证明你拥有该域名
手动生成challenges目录，用来存放验证文件（路径可以根据需要修改）
mkdir -p /var/www/challenges
配置nignx的80端口
server {
listen 80;
server_name yoursite.com www.yoursite.com;
location /.well-known/acme-challenge/ {
alias /var/www/challenges/;
try_files $uri =404;
}
}
获取签名证书
sudo chmod +x acme_tiny.py
python acme_tiny.py --account-key ./account.key --csr ./domain.csr --acme-dir /var/www/challenges/ > ./signed.crt
安装证书
针对nginx, 你还需要将 Let's Encrypt 的中间件证书 intermediate.pem 内容附加在签名证书signed.crt之后：
wget -O - https://letsencrypt.org/certs/lets-encrypt-x3-cross-signed.pem > intermediate.pem
cat signed.crt intermediate.pem > chained.pem
server {
listen 443;
server_name yoursite.com www.yoursite.com;
ssl on;
ssl_certificate /path/to/chained.pem;
ssl_certificate_key /path/to/domain.key;
ssl_session_timeout 5m;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA;
ssl_session_cache shared:SSL:50m;
ssl_prefer_server_ciphers on;
#...你的其他配置
}
证书自动更新定时任务
#!/usr/bin/sh
python /path/to/acme_tiny.py --account-key /path/to/account.key --csr /path/to/domain.csr --acme-dir /var/www/challenges/ > /tmp/signed.crt || exit
wget -O - https://letsencrypt.org/certs/lets-encrypt-x3-cross-signed.pem > intermediate.pem
cat /tmp/signed.crt intermediate.pem > /path/to/chained.pem
service nginx reload
定时任务可以设置为每个月执行一次：
0 0 1 * * /path/to/renew_cert.sh 2>> /var/log/acme_tiny.log
设置网站跳转
location / {
if ($host = "cjango.com") {
return 301 https://www.cjango.com$request_uri;
}
}
