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全球快讯:Docker获取Let`s Encrypt SSL 证书
来源: 博客园      时间:2023-04-28 09:24:25


(相关资料图)

文中的操作都是在CentOS Stream release 9下执行的,使用的是root用户。

1. 安装docker

# 卸载原有的dockeryum remove docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-engine# 安装依赖yum install -y yum-utils device-mapper-persistent-data lvm2# 配置docker-ce源yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo# 安装dockeryum install docker-ce docker-ce-cli containerd.io docker-compose-plugin# 安装docker-composewget https://github.com/docker/compose/releases/download/v2.17.2/docker-compose-linux-x86_64chmod +x docker-compose-linux-x86_64 && mv docker-compose-linux-x86_64 /usr/local/bin/docker-compose && ldconfig

2. Let`s Encrypt及Certbot介绍

关于Let`s Encrypt可以参见这里。

certbot安装使用参加这里。

3. Docker运行Certbot获取证书

为了方便维护、升级,同时也避免破坏本地的开发环境,我这里使用docker方式来运行certbot。整个过程分为两步:首次申请证书和证书更新。

3.1 首次申请证书

因为我的文章都是通过jekyll运行的静态网站,之后会通过nginx来运行,所以这里就以nginx为例来配置网站的tls证书。

  1. 创建nginx配置文件default.conf
server {    listen      80;    server_name example.com www.example.com;    # 高优先级,仅用于更新证书    location ~ /.well-known/acme-challenge {        allow all;        root /data/letsencrypt;    }}
  1. docker-compose文件:
version: "3.3"services:  nginx:    image: nginx:1.23.4-alpine    container_name: frontend    volumes:      - ./default.conf:/etc/nginx/conf.d/default.conf      - ./frontend:/usr/share/nginx/html    ports:      - 80:80
  1. 启动web服务: docker-compse up -d
  2. 启动certbot申请证书:

docker run --rm -it -v ./certbot/etc/letsencrypt:/etc/letsencrypt -v ./certbot/var/log/letsencrpt:/var/log/letsencrypt -v ./frontend:/data/letsencrypt certbot/certbot:latest certonly --webroot --email your@eamil.com --agree-tos --no-eff-email --webroot-path=/data/letsencrypt -d example.com -d example.com

运行结束后可以在./certbot/etc/letsencrypt/live目录下找到example.com文件夹,其中包含证书文件fullchain.pem和私钥文件privkey.pem

  1. 停止web服务:docker-compose down
  2. 更新compose文件:
version: "3.3"services:  nginx:    image: nginx:1.23.4-alpine    container_name: frontend    volumes:      - ./default.conf:/etc/nginx/conf.d/default.conf      # - ./frontend:/usr/share/nginx/html      - ./certbot/etc/letsencrypt/live:/letsencrypt/live        # 当前证书目录      - ./certbot/etc/letsencrypt/archive:/letsencrypt/archive  # 历史证书目录      - ./dhparam-2048.pem:/letsencrypt/dhparam-2048.pem        # 使用2048位DH(Diffie-Hellman)参数    ports:      - 80:80      - 443:443

2048为DH参数生成命令:openssl dhparam -out ./dhparam-2048.pem 2048

  1. 更新nginx配置文件
# 处理http请求server {    listen      80;    server_name example.com www.example.com;    # 重定向到https    location / {        rewrite ^ https://$host$request_uri? permanent;    }    # 高优先级,仅用于更新证书    location ~ /.well-known/acme-challenge {        allow all;        root /data/letsencrypt;    }}# 处理https请求server {    listen 443 ssl http2;    server_name example.com www.example.com;    server_tokens off;    ssl_certificate /letsencrypt/live/example.com/fullchain.pem;    ssl_certificate_key /letsencrypt/live/example.com/privkey.pem;    ssl_buffer_size 8k;    ssl_dhparam /letsencrypt/dhparam-2048.pem; # 使用2048位DH参数,加强安全    ssl_protocols TLSv1.2 TLSv1.1 TLSv1;    ssl_prefer_server_ciphers on;    ssl_ciphers ECDH+AESGCM:ECDH+AES256:ECDH+AES128:DH+3DES:!ADH:!AECDH:!MD5;    ssl_ecdh_curve secp384r1;    ssl_session_tickets off;    # OCSP stapling    ssl_stapling on;    ssl_stapling_verify on;    resolver 8.8.8.8;    root /usr/share/nginx/html;    index index.html;}
  1. 重新启动web服务:docker-compose up -d

3.2 证书更新

  1. 通过以下脚本可以实现证书更新:
#!/bin/bashdocker run -it --rm \-v ./certbot/etc/letsencrypt:/etc/letsencrypt \-v ./certbot/var/lib/letsencrypt:/var/lib/letsencrypt \-v ./certbot/var/log/letsencrypt:/var/log/letsencrypt \-v ./site:/data/letsencrypt \certbot/certbot \renew --webroot -w /data/letsencrypt --quiet && docker kill --signal=HUP frontend
  1. crontab -e新增一条定时任务,每月1号00:00更新一次证书:0 0 1 * * {{YOURPATH}}/renew.sh

声明:本作品采用署名-非商业性使用-相同方式共享 4.0 国际 (CC BY-NC-SA 4.0)进行许可,使用时请注明出处。Author: mengbinblog: mengbinGithub: mengbin92cnblogs: 恋水无意

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