| 1 | { config, pkgs, ... }: |
| 2 | |
| 3 | { |
| 4 | imports = [ |
| 5 | ./common.nix |
| 6 | ./ofborg-config.nix |
| 7 | ./github-tokens.nix |
| 8 | ]; |
| 9 | |
| 10 | deployment.tags = [ "ofborg-evaluator" ]; |
| 11 | |
| 12 | systemd.services.ofborg-mass-rebuilder = { |
| 13 | description = "ofBorg mass rebuilder"; |
| 14 | |
| 15 | wantedBy = [ "ofborg.target" ]; |
| 16 | bindsTo = [ "ofborg.target" ]; |
| 17 | restartTriggers = [ config.environment.etc."ofborg.json".source ]; |
| 18 | |
| 19 | path = [ |
| 20 | config.nix.package |
| 21 | config.programs.git.package |
| 22 | ]; |
| 23 | |
| 24 | environment = { |
| 25 | GIT_AUTHOR_NAME = "OfBorg"; |
| 26 | GIT_COMMITTER_NAME = "OfBorg"; |
| 27 | EMAIL = "ofborg@nixos.org"; |
| 28 | }; |
| 29 | |
| 30 | stopIfChanged = false; |
| 31 | unitConfig.StartLimitIntervalSec = 0; |
| 32 | serviceConfig = { |
| 33 | # Filesystem stuff |
| 34 | ProtectSystem = "strict"; # Prevent writing to most of / |
| 35 | ProtectHome = true; # Prevent accessing /home and /root |
| 36 | PrivateTmp = true; # Give an own directory under /tmp |
| 37 | PrivateDevices = true; # Deny access to most of /dev |
| 38 | ProtectKernelTunables = true; # Protect some parts of /sys |
| 39 | ProtectControlGroups = true; # Remount cgroups read-only |
| 40 | RestrictSUIDSGID = true; # Prevent creating SETUID/SETGID files |
| 41 | PrivateMounts = true; # Give an own mount namespace |
| 42 | RemoveIPC = true; |
| 43 | UMask = "0077"; |
| 44 | |
| 45 | Restart = "always"; |
| 46 | RestartSec = "5s"; |
| 47 | ExecStart = "${pkgs.ofborg}/bin/mass-rebuilder /etc/ofborg.json"; |
| 48 | User = "ofborg-mass-rebuilder"; |
| 49 | Group = "ofborg-mass-rebuilder"; |
| 50 | SupplementaryGroups = [ |
| 51 | "ofborg-github-oauth-secret" |
| 52 | "ofborg-github-app-key" |
| 53 | ]; |
| 54 | |
| 55 | StateDirectory = [ "ofborg/checkout" ]; |
| 56 | |
| 57 | # Capabilities |
| 58 | CapabilityBoundingSet = ""; # Allow no capabilities at all |
| 59 | NoNewPrivileges = true; # Disallow getting more capabilities. This is also implied by other options. |
| 60 | |
| 61 | # Kernel stuff |
| 62 | ProtectKernelModules = true; # Prevent loading of kernel modules |
| 63 | SystemCallArchitectures = "native"; # Usually no need to disable this |
| 64 | ProtectKernelLogs = true; # Prevent access to kernel logs |
| 65 | ProtectClock = true; # Prevent setting the RTC |
| 66 | |
| 67 | # Misc |
| 68 | LockPersonality = true; # Prevent change of the personality |
| 69 | ProtectHostname = true; # Give an own UTS namespace |
| 70 | RestrictRealtime = true; # Prevent switching to RT scheduling |
| 71 | MemoryDenyWriteExecute = true; # Maybe disable this for interpreters like python |
| 72 | PrivateUsers = true; # If anything randomly breaks, it's mostly because of this |
| 73 | RestrictNamespaces = true; |
| 74 | SystemCallFilter = "@system-service"; |
| 75 | }; |
| 76 | }; |
| 77 | |
| 78 | users.users.ofborg-mass-rebuilder = { |
| 79 | isSystemUser = true; |
| 80 | group = "ofborg-mass-rebuilder"; |
| 81 | description = "ofBorg mass rebuilder system user"; |
| 82 | }; |
| 83 | users.groups.ofborg-mass-rebuilder = { }; |
| 84 | |
| 85 | programs.git.enable = true; |
| 86 | |
| 87 | sops.secrets = { |
| 88 | "ofborg/github-oauth-secret".restartUnits = [ "ofborg-github-comment-filter.service" ]; |
| 89 | "ofborg/github-app-key".restartUnits = [ "ofborg-github-comment-filter.service" ]; |
| 90 | }; |
| 91 | } |