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Document working nixos-anywhere deployment

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Eli Ribble 2025-07-11 17:59:19 +00:00
parent 32d9721fd5
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40
README.md
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@ -46,9 +46,45 @@ I tried creating a cloud-init function based on NixOS-infect. You can see the co
## With nixos-anywhere.
First we start up a _really small_ s-1vcpu-1gb. Then we try to install nixos via nixos-anywhere. Notice the `--no-disko-deps` which is recommended for very low RAM systems:
```
$ nix run github:nix-community/nixos-anywhere -- --no-disko-deps --flake ./nixos-anywhere#digitalocean --target-host root@64.23.242.187
```
Cloud init data:
curl http://169.254.169.254/metadata/v1.json
After an hour it was railed on the CPU at 100% and had been for an hour with no network data going anywhere. I gave up. Must be too small. Tried again with a larger system, `s-2vcpu-4gb`:
```
$ nix run github:nix-community/nixos-anywhere -- --flake ./nixos-anywhere/flake.nix#digitalocean --target-host root@128.199.4.31
```
This worked and I was then able to ssh in as root. Interestingly, it has no `/etc/nixos/*` files (but the directory does exist). Resulting disk images:
```
# fdisk -l
Disk /dev/vda: 80 GiB, 85899345920 bytes, 167772160 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: E0C9241B-89EA-4E2C-A0CD-04A3FDEFEDA2
Device Start End Sectors Size Type
/dev/vda1 2048 4095 2048 1M BIOS boot
/dev/vda2 4096 1028095 1024000 500M EFI System
/dev/vda3 1028096 167770111 166742016 79.5G Linux filesystem
Disk /dev/vdb: 482 KiB, 493568 bytes, 964 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/pool-root: 79.51 GiB, 85370863616 bytes, 166739968 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
```
Next we'll try something at half that size

4
digitalocean/create-droplet.sh
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@ -4,8 +4,8 @@ doctl compute droplet create \
--image debian-12-x64 \
--project-id ce2159e8-02f5-4169-8943-f34ccf812d23 \
--region sfo3 \
--size s-1vcpu-1gb \
--size s-2vcpu-4gb \
--ssh-keys 48777034,46710608 \
--tag-name nixos \
--wait
# --size s-1vcpu-1gb \