方式一、源码包下载
wget https://github.com/dexidp/dex/archive/refs/tags/v2.42.1.tar.gz
方式二、git方式拉取源码编译：
Getting Started |
$ git clone https://github.com/dexidp/dex.git
编译
$ cd dex/
$ make build
启动
./bin/dex serve examples/config-dev.yaml
问题1：证书生成时域名鉴权失败失败
(base) root@server-4090-85:/tmp/dex# sudo certbot certonly --standalone -d daytona.com
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Requesting a certificate for daytona.com
Certbot failed to authenticate some domains (authenticator: standalone). The Certificate Authority reported these problems:
Domain: daytona.com
Type: unauthorized
Detail: 2606:4700:3035::6815:7b8: Invalid response from http://daytona.com/.well-known/acme-challenge/S4W15MXGjvL2Uh4wxlvbDMFgtmLAgQoDH2FP7zaKHCE: 403
Hint: The Certificate Authority failed to download the challenge files from the temporary standalone webserver started by Certbot on port 80. Ensure that the listed domains point to this machine and that it can accept inbound connections from the internet.
Some challenges have failed.
Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details.
根因根系：这个错误表明 Let's Encrypt 无法验证你对域名 daytona.com 的所有权。
解决方法：
1、# 检查域名解析
(base) root@server-4090-85:/tmp/dex# dig daytona.com
; <<>> DiG 9.18.30-0ubuntu0.22.04.2-Ubuntu <<>> daytona.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3667
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;daytona.com. IN A
;; ANSWER SECTION:
daytona.com. 300 IN A 104.21.7.184
daytona.com. 300 IN A 172.67.137.42
;; Query time: 163 msec
;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP)
;; WHEN: Thu May 08 11:20:09 UTC 2025
;; MSG SIZE rcvd: 72
根因定位：域名 daytona.com 解析到了 Cloudflare 的 IP 地址（104.21.7.184 和 172.67.137.42）。这就是为什么 Let's Encrypt 无法验证域名所有权的原因，因为请求被 Cloudflare 代理了。
2、让我们使用 Cloudflare DNS 验证方式来申请证书：
- 首先，获取 Cloudflare API 令牌：
- 登录 Cloudflare 控制台
- 进入 "My Profile" > "API Tokens"
- 创建新的 API 令牌，需要以下权限：
- Zone:DNS:Edit
- Zone:Zone:Read
待补充
