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feat: set proxy for nix-daemon only

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Ryan Yin 2024-02-16 10:06:59 +08:00
parent 14226a2c29
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27
docs/nixos-with-flakes/add-custom-cache-servers.md
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@ -225,31 +225,30 @@ In other words, you can use it like this:
};
}
```
## Using Local HTTP Proxy to Accelerate Package Downloads {#use-local-http-proxy-to-speed-up-nix-package-download}
## Using Local Proxy to Accelerate Package Downloads {#use-local-http-proxy-to-speed-up-nix-package-download}
> Related: [roaming laptop: network proxy configuration - NixOS/nixpkgs](https://github.com/NixOS/nixpkgs/issues/27535#issuecomment-1178444327)
While it has been mentioned earlier that a bypass route can completely solve the NixOS package download speed issue, configuring a bypass route is relatively cumbersome and often requires additional support from a software routing device.
Many users may prefer to directly accelerate package downloads through a locally running HTTP proxy. Here's how to set it up.
Many users may prefer to directly accelerate package downloads through a locally running HTTP/Sock5 proxy. Here's how to set it up.
Directly using methods like `export HTTPS_PROXY=http://127.0.0.1:7890` in the terminal won't be effective because Nix does its work in a background process called `nix-daemon`, not directly in the terminal.
To enable `nix-daemon` to use a proxy, you need to modify its systemd configuration. Here's how:
nix-daemon is implemented in [nixpkgs/nixos/modules/services/system/nix-daemon.nix](https://github.com/NixOS/nixpkgs/blob/nixos-23.11/nixos/modules/services/system/nix-daemon.nix#L184-L191),
It sets environment variables through the `systemd.services.nix-daemon.environment` option, and we can also use the same method to add proxy-related environment variables to the running environment of nix-daemon. Here's an example Module:
```bash
sudo mkdir /run/systemd/system/nix-daemon.service.d/
cat << EOF >/run/systemd/system/nix-daemon.service.d/override.conf
[Service]
Environment="http_proxy=socks5h://localhost:7891"
Environment="https_proxy=socks5h://localhost:7891"
Environment="all_proxy=socks5h://localhost:7891"
EOF
sudo systemctl daemon-reload
sudo systemctl restart nix-daemon
```nix
{
systemd.services.nix-daemon.environment = {
# socks5h mean that the hostname is resolved by the SOCKS server
https_proxy = "socks5h://localhost:7891";
# https_proxy = "http://localhost:7890"; # or use http prctocol instead of socks5
};
}
```
Using this approach, you might need to execute the above commands every time the system is restarted because the `/run` directory is a temporary file system that gets cleared upon a restart.
After deploying this configuration, you can use `sudo cat /proc/$(pidof nix-daemon)/environ | tr '\0' '\n'` to view all environment variables of the nix-daemon process and confirm whether the environment variable settings are effective.
> You may encounter HTTP 403 errors when downloading from GitHub using some commercial or public proxies, such as [nixos-and-flakes-book/issues/74]](https://github.com/ryan4yin/nixos-and-flakes-book/issues/74),
> You can try to solve this by changing the proxy server or setting [access-tokens](https://github.com/NixOS/nix/issues/6536)

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docs/zh/nixos-with-flakes/add-custom-cache-servers.md
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@ -229,32 +229,30 @@ Nix 提供了 [`extra-` 前缀](https://nixos.org/manual/nix/stable/command-ref/
}
```
## 通过本地 HTTP 代理加速包下载 {#use-local-http-proxy-to-speed-up-nix-package-download}
## 通过本地代理加速包下载 {#use-local-http-proxy-to-speed-up-nix-package-download}
> 参考了 Issue: [roaming laptop: network proxy configuration - NixOS/nixpkgs](https://github.com/NixOS/nixpkgs/issues/27535#issuecomment-1178444327)
虽然前面提到了，旁路由可以完全解决 NixOS 的包下载速度问题，但是旁路由的配置比较麻烦，而且经常需要额外的软路由设备支持。
更多的用户会希望能直接通过本机运行的 HTTP 代理来加速包下载，这里介绍下怎么设置。
更多的用户会希望能直接通过本机运行的 HTTP/Socks5 代理来加速包下载，这里介绍下怎么设置。
直接在 Terminal 中使用 `export HTTPS_PROXY=http://127.0.0.1:7890` 这类方式是无法生效的，因为 nix 实际干活的是一个叫 `nix-daemon` 的后台进程，而不是直接在 Terminal 中执行的命令。
要让 nix-daemon 使用代理，需要修改它的 systemd 配置，方法如下：
nix-daemon 的实现代码是 [nixpkgs/nixos/modules/services/system/nix-daemon.nix](https://github.com/NixOS/nixpkgs/blob/nixos-23.11/nixos/modules/services/system/nix-daemon.nix#L184-L191)，
它通过 `systemd.services.nix-daemon.environment` 选项设置了环境变量，我们也能通过同样的手段来往 nix-daemon 的运行环境中添加代理相关的环境变量，一个示例 Module 如下：
```bash
sudo mkdir /run/systemd/system/nix-daemon.service.d/
cat << EOF >/run/systemd/system/nix-daemon.service.d/override.conf
[Service]
Environment="http_proxy=socks5h://localhost:7891"
Environment="https_proxy=socks5h://localhost:7891"
Environment="all_proxy=socks5h://localhost:7891"
EOF
sudo systemctl daemon-reload
sudo systemctl restart nix-daemon
```nix
{
systemd.services.nix-daemon.environment = {
# socks5h mean that the hostname is resolved by the SOCKS server
https_proxy = "socks5h://localhost:7891";
# https_proxy = "http://localhost:7890"; # or use http prctocol instead of socks5
};
}
```
使用此方案，每次重启系统可能都需要重新执行一遍上述命令，因为 `/run` 目录是临时文件系统，重启后会被清空。
部署此配置后，可通过 `sudo cat /proc/$(pidof nix-daemon)/environ | tr '\0' '\n'` 查看 nix-daemon 进程的所有环境变量，确认环境变量的设置是否生效。
> 使用一些商用代理或公共代理时你可能会遇到 GitHub 下载时报 HTTP 403 错误（[nixos-and-flakes-book/issues/74](https://github.com/ryan4yin/nixos-and-flakes-book/issues/74)），
> 可尝试通过更换代理服务器或者设置 [access-tokens](https://github.com/NixOS/nix/issues/6536) 来解决。