ansheng’s blog!
CertBot+CloudFlare+Docker申请通配符域名证书
之前有讲到过Certbot使用DNS和文件验证两种方式申请SSL证书，但是这种方式无法申请通配符域名，通配符域名只能通过DNS验证的方式来进行。
CertBot提供了很多DNS插件，我们会使用certbot-dns-cloudflare这个插件来进行自动申请和自动部署。
申请CloudFlare API KEY
用DNS方式在申请和续订的时候，都需要添加一条TXT记录来证明对域名的拥有权，但是每次手动添加又会很麻烦，所以我们可以通过调用域名提供商的API，来进行自动添加TXT记录，这样就取消了每次手动添加的麻烦。
- 获取API Key
登录CF账号，点击右上角头像下面的我的个人资料
找到左侧API令牌—>点击创建令牌
因为我们只需要修改DNS的权限，所以选择使用编辑区域DNS模版
下面选择本次需要申请证书的域名，为了安全起见，一个API KEY对应一个域名
最后创建令牌
记得保存好API KEY，只会显示一次，后面只能更改了
申请证书
创建工作目录
mkdir -p $HOME/deploy/certbot/data/etc/letsencrypt && cd ~/deploy/certbot
将API KEY保存到cloudflare.ini文件中
$ vim data/etc/letsencrypt/cloudflare.ini
# Cloudflare API token used by Certbot
dns_cloudflare_api_token = _APIKEY_
安全起见把权限改为600
chmod 600 data/etc/letsencrypt/cloudflare.ini
创建申请脚本
$ vim apply.sh
#!/bin/bash
docker run --network host -it --rm --name certbot \
-v "$HOME/deploy/certbot/data/etc/letsencrypt:/etc/letsencrypt" \
-v "$HOME/deploy/certbot/data/var/lib/letsencrypt:/var/lib/letsencrypt" \
certbot/dns-cloudflare certonly \
--agree-tos \
--email info@ansheng.me \
--dns-cloudflare \
--dns-cloudflare-credentials /etc/letsencrypt/cloudflare.ini \
-d ansheng.me,*.ansheng.me
申请证书
$ bash apply.sh
Saving debug log to /var/log/letsencrypt/letsencrypt.log
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Would you be willing, once your first certificate is successfully issued, to
share your email address with the Electronic Frontier Foundation, a founding
partner of the Let's Encrypt project and the non-profit organization that
develops Certbot? We'd like to send you email about our work encrypting the web,
EFF news, campaigns, and ways to support digital freedom.
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(Y)es/(N)o: Y # 同意
Account registered.
Requesting a certificate for ansheng.me and *.ansheng.me
Waiting 10 seconds for DNS changes to propagate
Successfully received certificate.
Certificate is saved at: /etc/letsencrypt/live/ansheng.me/fullchain.pem
Key is saved at: /etc/letsencrypt/live/ansheng.me/privkey.pem
This certificate expires on 2023-01-16.
These files will be updated when the certificate renews.
NEXT STEPS:
- The certificate will need to be renewed before it expires. Certbot can automatically renew the certificate in the background, but you may need to take steps to enable that functionality. See https://certbot.org/renewal-setup for instructions.
We were unable to subscribe you the EFF mailing list because your e-mail address appears to be invalid. You can try again later by visiting https://act.eff.org.
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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
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查看证书信息
$ docker run --network host -it --rm --name certbot \
-v "$HOME/deploy/certbot/data/etc/letsencrypt:/etc/letsencrypt" \
-v "$HOME/deploy/certbot/data/var/lib/letsencrypt:/var/lib/letsencrypt" \
certbot/dns-cloudflare certificates
Saving debug log to /var/log/letsencrypt/letsencrypt.log
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Found the following certs:
Certificate Name: ansheng.me
Serial Number: xxxxxxxx
Key Type: RSA
Domains: ansheng.me *.ansheng.me
Expiry Date: 2023-01-16 13:40:36+00:00 (VALID: 89 days)
Certificate Path: /etc/letsencrypt/live/ansheng.me/fullchain.pem
Private Key Path: /etc/letsencrypt/live/ansheng.me/privkey.pem
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NGINX配置好之后的证书信息
自动续订
$ vim renew.sh
#!/bin/bash
docker run --network host -it --rm --name certbot \
-v "$HOME/deploy/certbot/data/etc/letsencrypt:/etc/letsencrypt" \
-v "$HOME/deploy/certbot/data/var/lib/letsencrypt:/var/lib/letsencrypt" \
certbot/dns-cloudflare renew --quiet
执行自动续订脚本
bash renew.sh
- 添加到定时任务中每天运行
$ crontab -e
00 00 * * * /bin/bash ~/deploy/certbot/renew.sh