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# Certbot 镜像 - Let's Encrypt 证书管理
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FROM certbot/certbot:latest
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#
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# 【重要】官方 certbot/certbot 镜像的 ENTRYPOINT 是 ["certbot"],这里不要覆盖
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# ENTRYPOINT 或 CMD。一旦覆盖,容器启动命令会变成 `certbot <你的 CMD>`,
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# certbot 无法解析而退出。正确用法是把容器当一次性任务跑:
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# docker compose run --rm certbot certonly ...
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# docker compose run --rm certbot renew
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FROM certbot/certbot:v5.8.0
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LABEL maintainer="awei"
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LABEL description="Let's Encrypt certificate management service"
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# 安装额外工具
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# 调试用工具(如需 DNS-01 验证,在此追加 pip install certbot-dns-xxx)
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RUN apk add --no-cache curl bash
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# 创建必要目录
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RUN mkdir -p /var/www/certbot /etc/letsencrypt /var/log/letsencrypt
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# 设置工作目录
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WORKDIR /var/www/certbot
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# 暴露端口(用于 ACME 验证)
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EXPOSE 80
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# 默认命令:启动 web 服务器用于 ACME 验证
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CMD ["sh", "-c", "while true; do echo 'HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nContent-Length: 2\r\n\r\nOK' | nc -l -p 80; done"]
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