okarin2: Init

This commit is contained in:
Simon Bruder 2023-12-21 15:06:16 +01:00
parent f691f35fcf
commit ab31615211
Signed by: simon
GPG key ID: 347FF8699CDA0776
10 changed files with 309 additions and 0 deletions

View file

@ -16,6 +16,7 @@ keys:
- &renge 06a917fc4a2a1b6b0f69a830285075cac85b7035
- &nunotaba 3176be14f468c6d43ab2206b4f273abccd49806b
- &okarin 868497ac4266a4d137e0718ae5fc3caa3b8107aa
- &okarin2 e7370b48016c961ef8ad792fda66b19d845b3156
- &shinobu 28677f2e3584b39f528a779caf445ebb39c882b7
- &nazuna 0b8be5d87a10a0e68dda97212c4befad1f9e915c
- &yuzuru a1ee5bc0249163a047440ef2649e770ec6ea16e4
@ -62,6 +63,13 @@ creation_rules:
- *simon-alpha
- *simon-beta
- *okarin
- path_regex: machines/okarin2/secrets\.yaml$
key_groups:
- pgp:
- *simon
- *simon-alpha
- *simon-beta
- *okarin2
- path_regex: machines/renge/secrets\.yaml$
key_groups:
- pgp:

28
keys/machines/okarin2.asc Normal file
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@ -0,0 +1,28 @@
-----BEGIN PGP PUBLIC KEY BLOCK-----
xsFNBAAAAAABEADJ6iuUnKyoNZU26YWhsIHwTIkhxnNCNDHrq42wSqDgBFU8QyzC
Nd8c34QghVGeqCFr/Md5xXMtgCmoNzFCMullb6PwDIYZ+9SP03B2seoqhnRwp1WG
twejt/dP3QgOBP3G4Tr8uxcdHFnLDvkzN66QyV+LcnzrEf0Dw/9y31Nuo5TlG7UT
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O6op26pqBZ839HoD9f4kaZXerhURWVGPcV81uUapR5/B8Pk/OK9LskBetDvoc+J1
+B3vM34cRIzbSs55BVrx/Mk6Vn9utPoyutlaJ/b5VMCmz4f2zU/XwPbXOzouvVrn
uy/bqY7aNz0eoeU7lKXrXc9as+VoJgc3Ty9Tt1vPi8lfTeQfmxUDtoer47dhn89C
3fL9R5/4utKt5nRtweOh6+z9T36jNodeHy3VhpuMnUBKsWSQn6Op2sLoeb6FJbh0
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NxR1Jvm5bnGfUcnNlzoB4Q==
=6o0h
-----END PGP PUBLIC KEY BLOCK-----

View file

@ -76,4 +76,9 @@ in
targetHost = "yuzuru.sbruder.de";
};
okarin2 = {
system = "x86_64-linux";
targetHost = "okarin2.sbruder.de";
};
}

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@ -0,0 +1,71 @@
<!--
SPDX-FileCopyrightText: 2023-2024 Simon Bruder <simon@sbruder.de>
SPDX-License-Identifier: CC-BY-SA-4.0
-->
# okarin
## Hardware
[Ionos VPS Linux XS](https://www.ionos.de/server/vps) S (1 Xeon Skylake vCPU, 1GiB RAM, 10GB SSD).
## Purpose
It will host services I want to have separated from the rest of my infrastructure.
## Name
Okabe Rintaro is a mad scientist from *Steins;Gate*
## Setup
Much like the namesake,
this server requires a “mad scientist” approach to set up.
However, it is much easier than setting up its predecessor,
which had just above 400MiB usable memory.
Ionos does not offer any NixOS installation media.
I could only choose between various installation media and rescue systems.
Also, installing NixOS with a low amount of memory is problematic.
I therefore created a VM locally with a disk image exactly 10737418240 Bytes in size.
On there, I installed NixOS.
Because encryption with `argon2id` as PBKDF is quite memory intensive,
I had to tune the parameters to ensure decryption was still possible on the target.
This can be done quite easily by interactively running the following command on the build VM:
cryptsetup luksChangeKey --pbkdf-memory 100747 --pbkdf-parallel 1 --pbkdf-force-iterations 29 /dev/vda3
The memory size was obtained by a successful run of `cryptsetup benchmark` inside the initrd on the target.
However, since those parameters are not ideal,
the following should later be run on the target host itself:
cryptsetup luksChangeKey --pbkdf-parallel 1 -i 10000 /dev/vda3
This will determine the memory usage automatically,
use one thread
and set the parameters so that decryption takes 10 seconds (10000ms).
The memory usage will not be as high as it could,
but it will be better.
Getting the disk image onto the server was done
by first `rsync`ing the image to another server (to allow for incremental iterations),
which then provided it via HTTP.
Using the Debian installation media in rescue mode
(as for some reason most other options tried to cache the file in memory and became very slow)
it was possible to write the image to disk with `wget -O /dev/sda http://server/okarin.img`.
Because of all the pitfalls of this,
you probably need more than one try.
To make debugging easier on the target, the following option can be set:
```nix
{ pkgs, ... }:
{
boot.initrd.preLVMCommands = ''
${pkgs.bashInteractive}/bin/bash
'';
}
```

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@ -0,0 +1,38 @@
# SPDX-FileCopyrightText: 2023-2024 Simon Bruder <simon@sbruder.de>
#
# SPDX-License-Identifier: AGPL-3.0-or-later
{ pkgs, ... }:
{
imports = [
./hardware-configuration.nix
../../modules
];
sbruder = {
nginx.hardening.enable = true;
full = false;
wireguard.home.enable = true;
};
networking.hostName = "okarin2";
system.stateVersion = "23.11";
services.nginx = {
enable = true;
virtualHosts."okarin2.sbruder.de" = {
enableACME = true;
forceSSL = true;
root = pkgs.sbruder.imprint;
};
};
networking.firewall.allowedTCPPorts = [
80
443
];
}

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@ -0,0 +1,66 @@
# SPDX-FileCopyrightText: 2023-2024 Simon Bruder <simon@sbruder.de>
#
# SPDX-License-Identifier: AGPL-3.0-or-later
{ lib, modulesPath, ... }:
{
imports = [
(modulesPath + "/profiles/qemu-guest.nix")
];
sbruder.machine.isVm = true;
boot = {
kernelModules = [ ];
extraModulePackages = [ ];
kernelParams = [ "ip=dhcp" ];
initrd = {
availableKernelModules = [ "aesni_intel" "ahci" "sd_mod" "sr_mod" "virtio_net" "virtio_pci" "xhci_pci" ];
kernelModules = [ ];
network = {
enable = true; # remote unlocking
# for some reason, the DHCP server does not transmit the static route to the gateway in a form udhcpc understands
# this works around this, but is arguably quite hacky
postCommands = ''
ip route add 85.215.165.1 dev eth0
ip route add default via 85.215.165.1 dev eth0
'';
};
luks.devices."root".device = "/dev/disk/by-uuid/1dcb9ee1-5594-4174-98a7-a362da09f131";
};
loader.grub.device = "/dev/vda";
};
fileSystems = {
"/" = {
device = "/dev/disk/by-uuid/3ab8f4a7-952c-4b6c-93c6-7b307d5bb88b";
fsType = "btrfs";
options = [ "compress=zstd" "discard" "noatime" "ssd" ]; # for some reason, the kernel assumes rotational
};
"/boot" = {
device = "/dev/disk/by-uuid/97aec56b-5fea-4445-83dc-4a20dcf482ce";
fsType = "ext2";
};
};
zramSwap = {
enable = true;
memoryPercent = 150;
};
networking = {
useDHCP = false;
usePredictableInterfaceNames = false;
};
systemd.network = {
enable = true;
networks = {
eth0 = {
name = "eth0";
DHCP = "yes";
domains = [ "sbruder.de" ];
};
};
};
}

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@ -0,0 +1,80 @@
wg-home-private-key: ENC[AES256_GCM,data:RkdgneGhH7prr/tkvHJeChQku2eXve9pV/SvtwsOjeinYO9veHw0rimdonY=,iv:vK6zNpu8F+TSLDTaif686Awjhs8WS2XJHzMtlvqlsIM=,tag:aKhV+kspVu+0CgPmYersxw==,type:str]
sops:
kms: []
gcp_kms: []
azure_kv: []
hc_vault: []
age: []
lastmodified: "2023-12-25T22:06:33Z"
mac: ENC[AES256_GCM,data:VbjyqrqDLCBDD9vGOHxSzsr9a5ZFFBJUkBRxJYBLereMDvInPFZnTwplHHkS5TdDFFAsjrcCgpCuPsUIbDdxFUNNtjdIe5JJwFMwT8XEFrgcswMGSKD6mIH2VBWop5pqoAV0eQ3YfKtDyhNHwixR8a+Z+hbGAY01Z19yteo51ZM=,iv:69EeBag+iUEoa18I0w1HeJKRwSQVCMRqUdV2CzUzMnY=,tag:WViKXJExL33jQAIWHUS8xw==,type:str]
pgp:
- created_at: "2024-01-24T12:19:03Z"
enc: |-
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hRlLbnUDE1Q=
=ol1Y
-----END PGP MESSAGE-----
fp: 6CD375BD0741F67E5A289BC333A01CBE0554C763
- created_at: "2024-01-24T12:19:03Z"
enc: |-
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G+tyNMgCYhM=
=2QnY
-----END PGP MESSAGE-----
fp: 0C8AF4B4320A511384DF6B5BB9BEFC7CC112A0C0
- created_at: "2024-01-24T12:19:03Z"
enc: |-
-----BEGIN PGP MESSAGE-----
hF4DLHeEFiC484ASAQdA6ojEbZ8HccTtorNbyw9aVKO73AJy6jTGV/qLt+FWoRgw
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VOK1Bc67BzU=
=3z3V
-----END PGP MESSAGE-----
fp: 403215E0F99D2582C7055C512C77841620B8F380
- created_at: "2024-01-24T12:19:03Z"
enc: |-
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-----END PGP MESSAGE-----
fp: e7370b48016c961ef8ad792fda66b19d845b3156
unencrypted_suffix: _unencrypted
version: 3.8.1

View file

@ -72,6 +72,7 @@ in
"hitagi.vpn.sbruder.de:9100"
"vueko.vpn.sbruder.de:9100"
"okarin.vpn.sbruder.de:9100"
"okarin2.vpn.sbruder.de:9100"
"shinobu.vpn.sbruder.de:9100"
"nazuna.vpn.sbruder.de:9100"
"yuzuru.vpn.sbruder.de:9100"

View file

@ -87,5 +87,13 @@
hostNames = [ "[yuzuru.sbruder.de]:2222" ];
publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAcvbbHSK7x9t0Jpr4L55RTC4WRNJIgKZ1B+99PhpSX8";
};
okarin2 = {
hostNames = [ "okarin2" "okarin2.sbruder.de" "okarin2.vpn.sbruder.de" ];
publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJvRAiEAV0Oulii0w3xcHCb0/oHqpA0hz3bn//BQnR8T";
};
okarin2-initrd = {
hostNames = [ "[okarin2.sbruder.de]:2222" ];
publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKOV+azRrT1zICmDe9D7bm3pOaFzaT+cVXCvxgY1bAbP";
};
};
}

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@ -36,6 +36,10 @@ let
address = "10.80.0.10";
publicKey = "KjDdTOVZ9RadDrNjJ11BWsY8SNBmDbuNoKm72wh9uCk=";
};
okarin2 = {
address = "10.80.0.14";
publicKey = "QOxkngtrkuXVMZyqWeGKh2ozn3x7GJsxwrlKje7jDmA=";
};
shinobu = {
address = "10.80.0.12";
publicKey = "ErLWueo4ikYH/mKHr3axyoAVZh+Bdh1NQBet42aD0kk=";