From 150ae963812d1991acd29e625dfbb1a9d9528e8b Mon Sep 17 00:00:00 2001 From: Gonne Date: Mon, 18 Dec 2023 17:55:00 +0100 Subject: [PATCH 1/3] Create backuphost Bragi --- nixos/machines/bragi/configuration.nix | 15 +++ .../machines/bragi/hardware-configuration.nix | 32 ++++++ nixos/machines/bragi/network.nix | 15 +++ nixos/modules/borgbackup.nix | 104 ++++++++++++++++++ 4 files changed, 166 insertions(+) create mode 100644 nixos/machines/bragi/configuration.nix create mode 100644 nixos/machines/bragi/hardware-configuration.nix create mode 100644 nixos/machines/bragi/network.nix create mode 100644 nixos/modules/borgbackup.nix diff --git a/nixos/machines/bragi/configuration.nix b/nixos/machines/bragi/configuration.nix new file mode 100644 index 0000000..f74fbb9 --- /dev/null +++ b/nixos/machines/bragi/configuration.nix @@ -0,0 +1,15 @@ +{ + imports = [ + ./hardware-configuration.nix + ../../roles + ../../roles/hardware.nix + ./network.nix + ../../modules/borgbackup.nix + ]; + + services.mathebau-borgbackup.enable = true; + + # System configuration here + networking.hostName = "bragi"; + system.stateVersion = "23.11"; +} diff --git a/nixos/machines/bragi/hardware-configuration.nix b/nixos/machines/bragi/hardware-configuration.nix new file mode 100644 index 0000000..4bd7168 --- /dev/null +++ b/nixos/machines/bragi/hardware-configuration.nix @@ -0,0 +1,32 @@ +{lib, ...}: { + fileSystems."/" = { + device = "root"; + fsType = "tmpfs"; + options = ["size=2G" "mode=755"]; + }; + fileSystems."/persist" = { + device = "/dev/disk/by-label/nixos"; + fsType = "btrfs"; + options = ["subvol=persist"]; + neededForBoot = true; + }; + fileSystems."/boot" = { + device = "/dev/disk/by-label/boot"; + fsType = "ext4"; + }; + fileSystems."/nix" = { + device = "/dev/disk/by-label/nixos"; + fsType = "btrfs"; + options = ["subvol=nix"]; + }; + fileSystems."/var/lib/backups" = { + device = "/dev/disk/by-label/backups"; + fsType = "btrfs"; + }; + + swapDevices = [{device = "/dev/disk/by-label/swap";}]; + + boot.loader.grub.device = "/dev/disk/by-id/wwn-0x5000c5003891662c"; + + nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux"; +} diff --git a/nixos/machines/bragi/network.nix b/nixos/machines/bragi/network.nix new file mode 100644 index 0000000..b113b50 --- /dev/null +++ b/nixos/machines/bragi/network.nix @@ -0,0 +1,15 @@ +# We sohuld put that config somewhere in roles and give it a parameter or something, +# everyone gets the same nameserver and the same prefixLength and address vs defaultGateway alsways +# depend on the same thing +{ + networking = { + interfaces.enp0s25.ipv4.addresses = [ + { + address = "192.168.1.11"; + prefixLength = 24; + } + ]; + defaultGateway = "192.168.1.137"; + nameservers = ["130.83.2.22" "130.83.56.60" "130.83.22.60" "130.82.22.63"]; + }; +} diff --git a/nixos/modules/borgbackup.nix b/nixos/modules/borgbackup.nix new file mode 100644 index 0000000..d019756 --- /dev/null +++ b/nixos/modules/borgbackup.nix @@ -0,0 +1,104 @@ +{ + config, + lib, + ... +}: let + inherit + (lib) + mkIf + mkEnableOption + ; + cfg = config.services.mathebau-borgbackup; +in { + imports = []; + + options.services.mathebau-borgbackup = { + enable = mkEnableOption "mathebau borgbackup service"; + }; + + config = mkIf cfg.enable { + services.borgbackup = { + # repos are made available at ssh://borg@hostname and served according to the presented ssh-key + repos = { + aphoom-zhah = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIA8pI6uinXezAMH4vG2yEbu/yOYU5vXcsZN74tYgV+Wj Aphoom-Zhah Backup" + ]; + path = "/var/lib/backups/aphoom-zhah"; + # subrepos are allowed because each vm creates at least one repo below this filepath and yibb-tstll even more + allowSubRepos = true; + }; + azathoth = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGBEwllQ77ktoirXX6dJ6ET8TfK4lzq0aaq+X4rrX2Vk Azathoth Backup" + ]; + path = "/var/lib/backups/azathoth"; + allowSubRepos = true; + }; + cthulhu = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMSJl1MvabUADTdOCgufsBzn1tIIpxMq4iDcYZsaW1lV Cthulhu Backup" + ]; + path = "/var/lib/backups/cthulhu"; + allowSubRepos = true; + }; + dagon = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJaTBennwqT9eB43gVD1nM1os3dMPZ8RWwIKPEjqMK5V Dagon Backup" + ]; + path = "/var/lib/backups/dagon"; + allowSubRepos = true; + }; + eihort = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHLoDxtY4Tp6NKxLt9oHmWT6w4UpU6eA1TnPU2Ut83BN Eihort Backup" + ]; + path = "/var/lib/backups/eihort"; + allowSubRepos = true; + }; + hastur = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILeDvTyOUdIPARatX0PPhHgrV1gjERWLt2Twa8E2GETb Hastur Backupsystem" + ]; + path = "/var/lib/backups/hastur"; + allowSubRepos = true; + }; + ithaqua = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPJmBf8cz3FTDdeuxWbp1MO2yPT5rvH8ZIGUzfogjpXi Ithaqua Backup" + ]; + path = "/var/lib/backups/ithaqua"; + allowSubRepos = true; + }; + sanctamariamaterdei = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIH9Le5OI4ympQ0mQKYHmxgxGF598rzpD5VVpWK1mGfd8 Sanctamariamaterdei Backupsystem" + ]; + path = "/var/lib/backups/sanctamariamaterdei"; + allowSubRepos = true; + }; + tsathoggua = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKS9/1lFOhv+3sNuGcysM3TYh2xRrjMeAZX3K7CBx0QW Tsathoggua Backup" + ]; + path = "/var/lib/backups/tsathoggua"; + allowSubRepos = true; + }; + uvhash = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIB8DjIqgFgmYhQnTLpbqL0r7xBPb8TPy6SO5RhQ31OGj Uvhash Backup" + ]; + path = "/var/lib/backups/uvhash"; + allowSubRepos = true; + }; + yibb-tstll = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINlnGOV58Ks9lu+WTI4F7QAHtDrJq2jY8ZocITZG8K0+ Yibb-Tstll Backup" + ]; + path = "/var/lib/backups/yibb-tstll"; + allowSubRepos = true; + }; + }; + }; + }; +} From 3b286fa05be431e80b5d5eb16e35c3f2e30468e5 Mon Sep 17 00:00:00 2001 From: Gonne Date: Wed, 7 Feb 2024 15:21:15 +0100 Subject: [PATCH 2/3] Backup des Fachschaftsaccounts --- nixos/modules/borgbackup.nix | 41 ++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/nixos/modules/borgbackup.nix b/nixos/modules/borgbackup.nix index d019756..6179b1e 100644 --- a/nixos/modules/borgbackup.nix +++ b/nixos/modules/borgbackup.nix @@ -1,6 +1,7 @@ { config, lib, + pkgs, ... }: let inherit @@ -56,6 +57,13 @@ in { path = "/var/lib/backups/eihort"; allowSubRepos = true; }; + fsaccount = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIG+Y7fQTYdIWHehrKdk92CaJ0AisEux4OrS4nIyMstU4 FS Account Backup" + ]; + path = "/var/lib/backups/fsaccount"; + allowSubRepos = true; + }; hastur = { authorizedKeysAppendOnly = [ "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILeDvTyOUdIPARatX0PPhHgrV1gjERWLt2Twa8E2GETb Hastur Backupsystem" @@ -99,6 +107,39 @@ in { allowSubRepos = true; }; }; + # Configure backup of files on the department's fs account + jobs.fsaccount = { + preHook = '' + mkdir -p /home/fsaccount/sicherung # Create if it does not exist + ${pkgs.rsync}/bin/rsync -e 'ssh -i /home/fsaccount/.ssh/fsaccount' -r fachschaft@gw1.mathematik.tu-darmstadt.de:/home/fachschaft/* /home/fsaccount/sicherung + ''; + paths = "/home/fsaccount/sicherung"; + encryption.mode = "none"; + environment = { + BORG_RSH = "ssh -i /home/fsaccount/.ssh/fsaccount"; + BORG_UNKNOWN_UNENCRYPTED_REPO_ACCESS_IS_OK = "yes"; + }; + repo = "borg@localhost:fsaccount"; + startAt = "daily"; + user = "fsaccount"; + group = "users"; + readWritePaths = ["/home/fsaccount"]; + }; + }; + environment.persistence.${config.impermanence.name} = { + users.fsaccount.directories = [ + { + directory = ".ssh"; # SSH Key with access to FS Account and known_hosts + mode = "u=rwx,g=,o="; + } + ]; + }; + # Extra user for FS account backup + users.users = { + fsaccount = { + description = "FS Account backup"; + isNormalUser = true; + }; }; }; } From d06350b450960f98dea3ff4c3f9ad431dd0f9c1c Mon Sep 17 00:00:00 2001 From: Gonne Date: Mon, 4 Mar 2024 09:23:25 +0100 Subject: [PATCH 3/3] Address Feedback --- nixos/modules/borgbackup.nix | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/nixos/modules/borgbackup.nix b/nixos/modules/borgbackup.nix index 6179b1e..54e4595 100644 --- a/nixos/modules/borgbackup.nix +++ b/nixos/modules/borgbackup.nix @@ -20,6 +20,11 @@ in { config = mkIf cfg.enable { services.borgbackup = { # repos are made available at ssh://borg@hostname and served according to the presented ssh-key + + # If you think about adding keys of nix machines: + # Congratulations, you are the first person to make backups from a nixos machine. + # Your won the task of automatizing this endeavor, so in future we don't need to hand copy any + # ssh keys anymore. repos = { aphoom-zhah = { authorizedKeysAppendOnly = [ @@ -138,7 +143,10 @@ in { users.users = { fsaccount = { description = "FS Account backup"; - isNormalUser = true; + isSystemUser = true; + home = "/home/fsaccount"; + createHome = true; + group = "users"; }; }; };