nostr 是一个相当简单的开放协议，可以在全球范围内搭建一个有趣的社交网络。因为协议本身很简单，所以大部分的加密、签名工作在客户端完成，而中继服务器 Relay 所做的事情只是接收事件消息，根据客户端订阅要求返回消息。
目前 relay 的实现也很多，比如 nostream 的搭建就很方便，只要安装好 docker，设置好域名，直接运行就可以啦。
以下记录一下 Relay 的搭建过程。
1. 安装基础软件
首先分配一台安装 Ubuntu Server 20.04 LTS Ubuntu Server 20.04 LTS 操作系统的虚拟机，默认规格就够了。
首先，更新软件包列表。提示 30 个软件包需要升级，暂时先不管。
kimim@nostr:~$ sudo apt update # update package list from mirrors Fetched 25.5 MB in 4s (6240 kB/s) Reading package lists... Done Building dependency tree... Done Reading state information... Done 30 packages can be upgraded. Run 'apt list --upgradable' to see them.
然后，安装以下软件包，用来运行编译 nostream，配置 relay 的证书。
kimim@nostr:~$ sudo apt install nodejs npm nginx certbot python3-certbot-nginx # list of packages need to be installed 0 upgraded, 410 newly installed, 0 to remove and 30 not upgraded. Need to get 168 MB of archives. After this operation, 669 MB of additional disk space will be used. Do you want to continue? [Y/n] Y # installation in progress
2. 安装 docker
接下来，安装 docker，因为根据 nostream 官网要求，需要安装官方的 docker。就是按照 https://docs.docker.com/engine/install/ubuntu/ 安装 docker。
首先，删除已经安装的 docker（如果有，我的这台机器刚初始化，所以没有安装 docker）。
kimim@nostr:~$ sudo apt-get remove docker.io
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package 'docker.io' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 30 not upgraded.
然后，安装 docker 需要的证书组件。
kimim@nostr:~$ sudo apt-get install ca-certificates curl gnupg lsb-release Reading package lists... Done Building dependency tree... Done Reading state information... Done lsb-release is already the newest version (11.1.0ubuntu4). lsb-release set to manually installed. ca-certificates is already the newest version (20211016ubuntu0.22.04.1). ca-certificates set to manually installed. curl is already the newest version (7.81.0-1ubuntu1.7). curl set to manually installed. gnupg is already the newest version (2.2.27-3ubuntu2.1). gnupg set to manually installed. 0 upgraded, 0 newly installed, 0 to remove and 30 not upgraded.
接着，添加 docker 官方 GPG 证书。
kimim@nostr:~$ sudo mkdir -p /etc/apt/keyrings kimim@nostr:~$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
添加 docker 官方源：
kimim@nostr:~$ echo \ "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \ $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
再次更新软件包：
kimim@nostr:~$ sudo apt-get update
Get:1 https://download.docker.com/linux/ubuntu jammy InRelease [48.9 kB]
Get:2 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages [12.7 kB]
Fetched 61.6 kB in 1s (105 kB/s)
Reading package lists... Done
安装 docker 以及 cli，compose 插件。
kimim@nostr:~$ sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin # list of packages need to be installed 0 upgraded, 11 newly installed, 0 to remove and 30 not upgraded. Need to get 111 MB of archives. After this operation, 397 MB of additional disk space will be used. Do you want to continue? [Y/n] Y # installation in progress
把当前用户添加到 docker 权限组：
kimim@nostr:~$ sudo usermod -a -G docker kimim kimim@nostr:~$ newgrp docker
测试一下 docker 是否正常工作：
kimim@nostr:~$ docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
2db29710123e: Pull complete
Digest: sha256:aa0cc8055b82dc2509bed2e19b275c8f463506616377219d9642221ab53cf9fe
Status: Downloaded newer image for hello-world:latest
Hello from Docker!
This message shows that your installation appears to be working correctly.
3. 配置服务器证书
修改 nginx 的配置文件。请根据自己的服务器域名修改 server_name 字段。
kimim@nostr:~$ sudo rm -rf /etc/nginx/sites-available/default kimim@nostr:~$ sudo vi /etc/nginx/sites-available/default # 添加以下内容 kimim@nostr:~$ cat /etc/nginx/sites-available/default server{ server_name nostr.kimi.im; location / { proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $host; proxy_pass http://127.0.0.1:8008; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection "upgrade"; } }
重启 nginx，使配置生效。
kimim@nostr:~$ sudo service nginx restart
添加 A 域名记录，比如：
TYPE HOST ANSWER TTL A nostr.kimi.im 192.30.252.153 300
等一两分钟，等域名记录生效，再用 certbox 配置服务器证书：
kimim@nostr:~$ sudo certbot --nginx -d nostr.kimi.im Saving debug log to /var/log/letsencrypt/letsencrypt.log Enter email address (used for urgent renewal and security notices) (Enter 'c' to cancel): kimim@kimi.im - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Please read the Terms of Service at https://letsencrypt.org/documents/LE-SA-v1.3-September-21-2022.pdf. You must agree in order to register with the ACME server. Do you agree? - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - (Y)es/(N)o: Y Successfully received certificate. Certificate is saved at: /etc/letsencrypt/live/nostr.kimi.im/fullchain.pem Key is saved at: /etc/letsencrypt/live/nostr.kimi.im/privkey.pem This certificate expires on 2023-05-05. These files will be updated when the certificate renews. Certbot has set up a scheduled task to automatically renew this certificate in the background. Deploying certificate Successfully deployed certificate for nostr.kimi.im to /etc/nginx/sites-enabled/default Congratulations! You have successfully enabled HTTPS on https://nostr.kimi.im - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
4. 运行 nostream
获取 nostream 代码：
kimim@nostr:~$ git clone https://github.com/Cameri/nostream.git
Cloning into 'nostream'...
remote: Enumerating objects: 3287, done.
remote: Counting objects: 100% (1228/1228), done.
remote: Compressing objects: 100% (415/415), done.
remote: Total 3287 (delta 889), reused 984 (delta 803), pack-reused 2059
Receiving objects: 100% (3287/3287), 1.05 MiB | 7.90 MiB/s, done.
Resolving deltas: 100% (2036/2036), done.
用 docker 运行 nostream，大概用了两分钟，就看到一个漂亮的 NOSTREAM logo 了。
kimim@nostr:~$ cd nostream/ kimim@nostr:~/nostream$ npm run docker:compose:start > nostream@1.21.0 docker:compose:start > ./scripts/start [+] Running 25/25 # ... [+] Building 128.2s (16/16) FINISHED # ... [+] Running 6/5 # ... Attaching to nostream, nostream-cache, nostream-db, nostream-migrate # ... nostream-db | CREATE DATABASE # ... nostream | nostream | ███▄ █ ▒█████ ██████ ▄▄▄█████▓ ██▀███ ▓█████ ▄▄▄ ███▄ ▄███▓ nostream | ██ ▀█ █ ▒██▒ ██▒▒██ ▒ ▓ ██▒ ▓▒▓██ ▒ ██▒▓█ ▀▒████▄ ▓██▒▀█▀ ██▒ nostream | ▓██ ▀█ ██▒▒██░ ██▒░ ▓██▄ ▒ ▓██░ ▒░▓██ ░▄█ ▒▒███ ▒██ ▀█▄ ▓██ ▓██░ nostream | ▓██▒ ▐▌██▒▒██ ██░ ▒ ██▒░ ▓██▓ ░ ▒██▀▀█▄ ▒▓█ ▄░██▄▄▄▄██ ▒██ ▒██ nostream | ▒██░ ▓██░░ ████▓▒░▒██████▒▒ ▒██▒ ░ ░██▓ ▒██▒░▒████▒▓█ ▓██▒▒██▒ ░██▒ nostream | ░ ▒░ ▒ ▒ ░ ▒░▒░▒░ ▒ ▒▓▒ ▒ ░ ▒ ░░ ░ ▒▓ ░▒▓░░░ ▒░ ░▒▒ ▓▒█░░ ▒░ ░ ░ nostream | ░ ░░ ░ ▒░ ░ ▒ ▒░ ░ ░▒ ░ ░ ░ ░▒ ░ ▒░ ░ ░ ░ ▒ ▒▒ ░░ ░ ░ nostream | ░ ░ ░ ░ ░ ░ ▒ ░ ░ ░ ░ ░░ ░ ░ ░ ▒ ░ ░ nostream | ░ ░ ░ ░ ░ ░ ░ ░ ░ ░ nostream | v1.21.0 nostream | NIPs implemented: 1,2,4,9,11,12,15,16,20,22,26,28,33,40 nostream | Pay-to-relay disabled nostream | Payments provider: zebedee nostream | 2 client workers started nostream | 1 maintenance worker started nostream | Tor hidden service: disabled
5. 用 noscl 测试 relay 是否正常工作
删除之前添加的 relay：
[kimim@virtualbox Desktop]$ ./noscl relay wss://nos.lol: rw [kimim@virtualbox Desktop]$ ./noscl relay remove wss://nos.lol Removed relay wss://nos.lol.
添加刚刚搭建的 relay：
[kimim@virtualbox Desktop]$ ./noscl relay add wss://nostr.kimi.im Added relay wss://nostr.kimi.im.
发送消息 Bonjour tout le monde：
[kimim@virtualbox Desktop]$ ./noscl publish "Bonjour tout le monde" Sent event a170e3f3c4f8cfb79cacccf28d5f7d51a5e17b4e40c0984593a692b83f9cf43c to 'wss://nostr.kimi.im'. Seen a170e3f3c4f8cfb79cacccf28d5f7d51a5e17b4e40c0984593a692b83f9cf43c on 'wss://nostr.kimi.im'.
在 Damus 一开始收不测试帐号发送的消息，需要在 Damus 客户端也添加同样的 relay。
然后，就能看到测试帐号发的：Bonjour tout le monde
via https://kimi.im/2023-02-04-setup-nostr-relay
