使用Let’s Encrypt 给网站加 HTTPS
By admin
- 3 minutes read - 476 words2017.03.27更新:
/usr/bin/letsencrypt
被/usr/bin/certbot
替代,更新文章中所用到的命令。参考: Archlinux Let’s Encrypt Wiki
Let’s Encrypt 证书生成不需要手动进行,官方推荐 certbot 这套自动化工具来实现。3步轻松搞定:
- 下载安装 certbot (Let’s Encrypt项目的自动化工具)
- 创建配置文件
- 执行证书自动化生成命令
环境: centos7 64位 nginx
一、安装certbot
$yum -y install certbot
#检查安装是否成功
$certbot --help
如果安装过程中遇到python的问题,解决办法请参考: https://blog.haohtml.com/archives/17491 二、生成域名证书
这里使用的域名为 blog.haohtml.com, 网站根目录为 /data/wwwroot/haohtml/blog
#为一个已经存在的站点生成证书文件,一个证书可以多个域名共用,一次也可以生成多个域名谈证书(内容放在了同一个文件里),命令格式如下: $certbot certonly –webroot -w /data/wwwroot/haohtml/htdocs -d www.example.com -d example.com -w /var/www/other -d other.example.net -d another.other.example.net
在终端里执行命令
$certbot certonly --webroot -w /data/wwwroot/haohtml/blog/ -d blog.haohtml.com
会看到以下输出信息: Saving debug log to /var/log/letsencrypt/letsencrypt.log Starting new HTTPS connection (1): acme-v01.api.letsencrypt.org Obtaining a new certificate Performing the following challenges: http-01 challenge for blog.haohtml.com Using the webroot path /data/wwwroot/haohtml/blog for all unmatched domains. Waiting for verification… Cleaning up challenges
IMPORTANT NOTES: – Congratulations! Your certificate and chain have been saved at /etc/letsencrypt/live/blog.haohtml.com/fullchain.pem. Your cert will expire on 2017-09-18. To obtain a new or tweaked version of this certificate in the future, simply run certbot again. To non-interactively renew *all* of your certificates, run “certbot 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
表示生成证书成功,证书目录为/etc/letsencrypt/live/blog.haohtml.com/,我们看以下此目录都有哪些文件
$ls -al /etc/letsencrypt/live/blog.haohtml.com/
cert.pem chain.pem fullchain.pem privkey.pem README 其中前四个文件均为连接文件
下面我们添加一个启用https的虚拟主机配置文件,内容如下
三、配置虚拟主机 添加一个blog.conf文件(nginx会加载指定目录下的所有,conf文件),内容如下(wordpress)
server {
listen 443;
server_name blog.haohtml.com;
root /data/wwwroot/haohtml/blog;
ssl on;
ssl_certificate /etc/letsencrypt/live/blog.haohtml.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/blog.haohtml.com/privkey.pem;
ssl_trusted_certificate /etc/letsencrypt/live/blog.haohtml.com/chain.pem;
ssl_session_timeout 1d;
ssl_session_cache shared:SSL:50m;
ssl_session_tickets off;
ssl_prefer_server_ciphers on;
add_header Strict-Transport-Security max-age=15768000;
ssl_stapling on;
ssl_stapling_verify on;
location / {
index index.html index.php index.htm index.shtml;
}
rewrite ^/sitemap(-+([a-zA-Z0-9_-]+))?.xml$ "/index.php?xml_sitemap=params=$2" last;
rewrite ^/sitemap(-+([a-zA-Z0-9_-]+))?.xml.gz$ "/index.php?xml_sitemap=params=$2;zip=true" last;
rewrite ^/sitemap(-+([a-zA-Z0-9_-]+))?.html$ "/index.php?xml_sitemap=params=$2;html=true" last;
rewrite ^/sitemap(-+([a-zA-Z0-9_-]+))?.html.gz$ "/index.php?xml_sitemap=params=$2;html=true;zip=true" last;
if (-f $request_filename/index.html){
rewrite (.*) $1/index.html break;
}
if (-f $request_filename/index.php){
rewrite (.*) $1/index.php;
}
if (!-f $request_filename){
rewrite (.*) /index.php;
}
location ^~ /.well-known {
allow all;
alias /data/wwwroot/haohtml/blog/.well-known/;
default_type "text/plain";
try_files $uri =404;
}
location ~* ^/(data|images|data|uploads)/.*.(php|php5)$
{
deny all;
}
location ~ .php$ {
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME /data/wwwroot/haohtml/blog$fastcgi_script_name;
include fastcgi_params;
}
location ~ .*.(gif|jpg|jpeg|png|bmp|swf|js|css)$
{
expires 30d;
}
access_log /var/log/httpd/blog/access.log;
error_log /var/log/httpd/blog/error.log;
}
如果使用的是Apache的话,修改如下: 修改 apache 配置文件 httpd.conf,找到以下内容并去掉前面的“#”:
LoadModule ssl_module modules/mod_ssl.so
并添加一行
Listen 443
添加虚拟主机配置文件 www.conf
ServerAdmin admin@linuxeye.com
DocumentRoot "/data/wwwroot/abc.cn/wwwroot"
ServerName www.abc.cn
ErrorLog "/data/wwwlogs/abc.cn_error_apache.log"
CustomLog "/data/wwwlogs/abc.cn_apache.log" common
SSLEngine on
SSLCertificateFile /etc/letsencrypt/live/www.abc.cn/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/www.abc.cn/privkey.pem
<Directory "/data/wwwroot/abc.cn/wwwroot">
SetOutputFilter DEFLATE
Options FollowSymLinks ExecCGI
Require all granted
AllowOverride All
Order allow,deny
Allow from all
DirectoryIndex index.html index.php
四、重启Nginx,测试https是否生效
测试一下nginx配置文件是否存在错误
$/usr/local/nginx/sbin/nginx -t
the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok configuration file /usr/local/nginx/conf/nginx.conf test is successful
$/usr/local/nginx/sbin/nginx -s reload
此时,打开域名 https://xxxxx 应该可以看到效果了
五、定时更新证书
由于 [Let’s Encrypt] 的证书目前有效期为3个月,过期后可以免费重新生成证书,可视为免费证书,只需要添加一个crond脚本即可.(好像每天生成证书有次数限制,一般也用不着如此频繁的操作)
将下行添加到 /etc/crontab文件里,并设定每三个月自动更新一次(脚本不确定是否正确)或者按月份写几个,每三个月为一个周期。
0 0 1 */2 * certbot renew
或者使用静默升级,每月1号5点
00 05 01 * * /usr/bin/certbot renew --quiet && apachectl restart
命令执行过程会检查证书的到期日期,如果证书还未到期会提示你的证书尚未到期,输出如下:
Saving debug log to /var/log/letsencrypt/letsencrypt.log
-------------------------------------------------------------------------------
Processing /etc/letsencrypt/renewal/yourdomain.com.conf
-------------------------------------------------------------------------------
Cert not yet due for renewal
The following certs are not due for renewal yet:
/etc/letsencrypt/live/yourdomain.com/fullchain.pem (skipped)
No renewals were attempted.
注意:如果你创建了多个域名的证书,这里也只显示基本域名的信息,但证书更新会对证书包含的所有域名有效。 为确保证书永不过期,需要增加一个cron的定期执行任务,由于更新证书脚本首先会检查证书的到期日期,并且仅当证书距离少于30天时才会执行更新,因此可以安全的创建每周甚至每天运行的cron任务。
六、后期优化
由于我们以前网使用的是http访问,现在想平滑过度到https,而还要考虑到seo效果,如需要当用户访问http网站时让其自动转到https网站相对应的网址即可,nginx的配置:
server {
listen 80;
server_name www.abc.cn;
rewrite ^(.*) https://$server_name$1 permanent;
}
Apache的配置(在虚拟主机或者.htaccess文件配置):
RewriteEngine on
RewriteCond %{HTTP_HOST} !^443$ [NC]
RewriteRule ^(.*) https://%{SERVER_NAME}%{REQUEST_URI} [R=301,L]
.用专业在线工具测试你的服务器 SSL 安全性 Qualys SSL Labs 提供了全面的 SSL 安全性测试,填写你的网站域名,给自己的 HTTPS 配置打个分。
参考: https://ksmx.me/letsencrypt-ssl-https/