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feat: intro
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Ryan Yin
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@ -28,4 +28,19 @@ To my delight, NixOS has exceeded my expectations. The most astonishing aspect i
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The rollback capability and reproducibility of NixOS has instilled a great deal of confidence in me—I no longer fear breaking the system. I've even ventured into experimenting with new things on NixOS, such as the hyprland compositor. Previously, on EndeavourOS, I wouldn't have dared to tinker with such novel compositors, as any system mishaps would have entailed significant manual troubleshooting using various workarounds.
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This is why I chose NixOS.
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As I get more and more involved with NixOS and Nix, I find it also very suitable for synchronously managing the configuration of multiple hosts.
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Currently my personal [ryan4yin/nix-config] (https://github.com/ryan4yin/nix-config) synchronously manages the configuration of many hosts:
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- Desktop computers
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- 1 Macbook Pro 2020 (Intel amd64).
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- 1 Macbook Pro 2022 (M2 aarch64).
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- 1 NixOS desktop PC (amd64).
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- Servers
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- 3 NixOS virtual machines (amd64).
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- Several development boards for aarch64 and riscv64.
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The development environment of three desktop computers is managed by Home Manager,
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the main configuration is completely shared, and the configuration modified on any host can be seamlessly synchronized to other hosts through Git.
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Nix almost completely shielded me from the differences between OS and architecture at the bottom of the three machines, and the experience was very slippery!
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@ -2,7 +2,7 @@
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Now that we have learned the basics of the Nix language, we can start using it to configure our NixOS system. The default configuration file for NixOS is located at `/etc/nixos/configuration.nix`. This file contains all the declarative configuration for the system, including settings for the time zone, language, keyboard layout, network, users, file system, and boot options.
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To modify the system state in a reproducible manner (which is highly recommended), we need to manually edit the `/etc/nixos/configuration.nix` file and then execute `sudo nixos-rebuild switch` to apply the modified configuration. This command generates a new system environment based on the modified configuration file, sets the new environment as the default one, and preserves the previous environment in the boot options of grub/systemd-boot. This ensures that we can always roll back to the old environment if the new one fails to start.
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To modify the system state in a reproducible manner (which is highly recommended), we need to manually edit the `/etc/nixos/configuration.nix` file and then execute `sudo nixos-rebuild switch` to apply the modified configuration. This command generates a new system environment based on the modified configuration file, sets the new environment as the default one, and preserves the previous environment in the boot options of grub/systemd-boot. This ensures that we can always roll back to the old environment even if the new one fails to start.
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While `/etc/nixos/configuration.nix` is the classic method for configuring NixOS, it relies on data sources configured by `nix-channel` and lacks a version-locking mechanism, making it challenging to ensure the reproducibility of the system. A better approach is to use Flakes, which provides reproducibility and facilitates configuration management.
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@ -33,4 +33,17 @@ Nix 是一个声明式的软件包管理器，用户需要通过某些配置声
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NixOS 的回滚能力与可复现能力给了我非常大的底气，我现在再也不用怕把系统搞挂了（挂了直接回滚就恢复了），于是我又在 NixOS 尝试了许多新鲜玩意儿！
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在以前 EndeavourOS 上我肯定是不太敢这么玩的，因为万一要是把系统玩出问题了，就必须手动修复系统状态，那可是相当麻烦。
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这就是我选择 NixOS 的原因。
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随着我对 NixOS 与 Nix 的使用越来越深入，我发现它还非常适合用于同步管理多台主机的配置。
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目前我的个人配置 [ryan4yin/nix-config](https://github.com/ryan4yin/nix-config) 同步管理了许多主机的配置：
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- 桌面电脑
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- 一台 Macbook Pro 2020 (Intel amd64)
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- 一台 Macbook Pro 2022 (M2 aarch64)
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- 一台 NixOS 桌面 PC (amd64)
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- 服务器
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- 三台 NixOS 虚拟机(amd64)
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- 若干块 aarch64 跟 riscv64 的开发板
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其中三台桌面电脑的开发环境都通过 Home Manager 管理，主要配置完全共用，在任意一台主机上修改的配置，可以通过 Git 无缝同步到其他主机上。NixOS 几乎完全帮我屏蔽了三台机器底层的 OS 与芯片架构差异，体验非常丝滑！
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