115 lines
3.5 KiB
Markdown
115 lines
3.5 KiB
Markdown
# Internal Usage
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## Update Server
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**NOTE**: I want to establish a solid way to do this without `root@`.
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```fish
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g a; set host beefcake; nix run nixpkgs#nixos-rebuild -- --flake ".#$host" \
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--target-host "root@$host" --build-host "root@$host" \
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switch --show-trace
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```
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## Safer Method
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```bash
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# make sure all files are at least staged so nix flakes will see them
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git add -A
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# initialize a delayed reboot by a process you can kill later if things look good
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# note that the amount of time you give it probably needs to be enough time to both complete the upgrade
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# _and_ perform whatever testing you need
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host=your_host
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ssh -t "root@$host" "bash -c '
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set -m
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# sleep 30 mins
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(sleep 1800; reboot;) &
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jobs -p
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bg
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disown
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'"
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# build the system and start running it, but do NOT set the machine up to boot to that system yet
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# we will test things and make sure it works first
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# if it fails, the reboot we started previously will automatically kick in once the timeout is reached
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# and the machine will boot to the now-previous iteration
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nix run nixpkgs#nixos-rebuild -- --flake ".#$host" \
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--target-host "root@$host" --build-host "root@$host" \
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test --show-trace
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# however you like, verify the system is running as expected
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# if it is, run the same command with "switch" instead of "test"
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# otherwise, we will wait until the machine reboots back into the
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# this is crude, but should be pretty foolproof
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# the main gotcha is that the system is already unbootable or non-workable, but
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# if you always use this method, that should be an impossible state to get into
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# if we still have ssh access and the machine fails testing, just rollback
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# instead of waiting for the reboot
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ssh "root@$host" nixos-rebuild --rollback switch
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```
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## Provisioning New NixOS Hosts
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Note that for best results the target flake attribute should first be built and
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cached to the binary cache at `nix.h.lyte.dev`.
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```bash
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# establish network access
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# plug in ethernet or do the wpa_cli song and dance for wifi
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wpa_cli scan
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wpa_cli scan_results
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wpa_cli add_network 0
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wpa_cli set_network 0 ssid "MY_SSID"
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wpa_cli set_network 0 psk "MY_WIFI_PASSWORD"
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wpa_cli enable_network 0
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wpa_cli save_config
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# disk encryption key (if needed)
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echo -n "password" > /tmp/secret.key
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# partition disks
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nix-shell --packages git --run "sudo nix run \
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--extra-experimental-features nix-command \
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--extra-experimental-features flakes \
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github:nix-community/disko -- \
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--flake 'git+https://git.lyte.dev/lytedev/nix#${PARTITION_SCHEME}' \
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--mode disko \
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--arg disks '[ \"/dev/${DISK}\" ]'"
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# install
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nix-shell --packages git \
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--run "sudo nixos-install \
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--no-write-lock-file \
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--flake 'git+https://git.lyte.dev/lytedev/nix#${FLAKE_ATTR}' \
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--option trusted-substituters 'https://cache.nixos.org https://nix.h.lyte.dev' \
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--option trusted-public-keys 'cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= h.lyte.dev:HeVWtne31ZG8iMf+c15VY3/Mky/4ufXlfTpT8+4Xbs0='"
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```
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Then:
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1. Setup/copy any GPG/SSH keys.
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```shell
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# from a machine with the key
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$ gpg --export-secret-key --armor daniel@lyte.dev | ssh $host "umask 077; cat - > p.key"
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$ rsync -r ~/.ssh $host:~/.ssh
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# on the target machine
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$ gpg --import ~/p.key && rm ~/p.key
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$ gpg --edit-key daniel@lyte.dev # trust ultimately
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```
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2. Setup/copy any password stores.
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```shell
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$ rsync -r ~/.local/share/password-store $host:~/.local/share/password-store
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```
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3. Tailscale connection and roles.
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4. Firefox sync configured.
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# Temporary Firewall Changes
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Source: https://discourse.nixos.org/t/how-to-temporarily-open-a-tcp-port-in-nixos/12306/2
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