wip remote-builders rework

hosts/bolle/default.nix

@@ -16,7 +16,7 @@
 
     ../../profiles/domeneshop-dyndns
     #../../profiles/code-remote
-    #../../profiles/remote-builders
+    ../../profiles/remote-builders.nix
     #../../profiles/autossh-reverse-tunnels
   ];
   services.domeneshop-updater.targets = [ config.networking.fqdn ];

hosts/brumlebasse/default.nix

@@ -19,6 +19,7 @@
     ../../profiles/shell.nix
 
     #../../profiles/domeneshop-dyndns
+    ../../profiles/remote-builders.nix
   ];
   #services.domeneshop-updater.targets = [ config.networking.fqdn ];
 

hosts/eple/default.nix

@@ -17,7 +17,7 @@
 
     ../../profiles/domeneshop-dyndns
     #../../profiles/code-remote
-    #../../profiles/remote-builders
+    ../../profiles/remote-builders.nix
     #../../profiles/autossh-reverse-tunnels
   ];
   services.domeneshop-updater.targets = [ config.networking.fqdn ];

hosts/garp/default.nix

@@ -38,6 +38,7 @@
     #../../profiles/desktop/sound/pipewire.nix
 
     ../../profiles/domeneshop-dyndns
+    ../../profiles/remote-builders.nix
   ];
   services.domeneshop-updater.targets = [ config.networking.fqdn ];
 

hosts/known-hosts.toml

@@ -0,0 +1,109 @@
+#primarily user for remote builders
+
+#["host"]
+# https://search.nixos.org/options?query=nix.buildMachine
+#systems
+#maxJobs
+#speedFactor
+#supportedFeatures
+#mandatoryFeatures
+#ssh.user
+#ssh.port
+#ssh.protocol
+#ssh.proxyJump
+#ssh.publicKeyListen # cat /etc/ssh/ssh_host_ed25519_key.pub || ssh-keyscan {{fqdn}}
+#ssh.publicKeyUser # sudo ssh-keygen -t ed25519 && sudo cat /root/.ssh/id_ed25519.pub
+
+[default]
+systems = ["x86_64-linux"]
+maxJobs = 0 # not a builder
+speedFactor = 1
+supportedFeatures = []
+mandatoryFeatures = []
+ssh.user = "nixbld-remote" # "pbsds"
+ssh.port = 22
+ssh.protocol = "ssh" # "ssh-ng"
+
+["bjarte"]
+ssh.publicKeyUser = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAID7Ftu1LP+p+D6YWIo32V9w6ckHCIbrQWPyCNU4rBAbl root@bjarte"
+
+# in general: one job per 4 threads and 8GB RAM
+
+["bolle.pbsds.net"]
+maxJobs = 3 # 12 threads 32GB
+speedFactor = 5
+supportedFeatures = ["kvm","big-parallel","nixos-test"]
+ssh.publicKeyListen = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILeOB/57N1fQPVorIUlkkJZaQduBo+4+km2Qbj4ebd/k"
+ssh.proxyJump = "microbel.pvv.ntnu.no"
+
+["eple.pbsds.net"]
+maxJobs = 3 # 12 threads 32GB
+speedFactor = 5
+supportedFeatures = ["kvm","big-parallel","nixos-test"]
+ssh.publicKeyListen = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIH03MEINNnjBvtmvN2QsCDCLkvF9ow5FQJp9uiyQ1Iwi"
+ssh.proxyJump = "microbel.pvv.ntnu.no"
+
+["garp.pbsds.net"]
+maxJobs = 2 # 8 threads 32GB
+speedFactor = 4
+supportedFeatures = ["kvm","big-parallel","nixos-test"]
+ssh.publicKeyListen = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOkcZ3cUAKk8uUvZPsX7PDBInkb3Eps3Xh+xVrhPY+sx"
+ssh.proxyJump = "microbel.pvv.ntnu.no"
+
+["noximilien.pbsds.net"]
+#maxJobs = 1 # 8 threads 8GB
+speedFactor = 2
+ssh.publicKeyListen = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJ3QhTGS03Sqm6OeCEz5AIGqJnBttKaBqMgNXp3Md7t4"
+ssh.publicKeyUser = "ssh-rsa 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 root@noximilien"
+
+["sopp.pbsds.net"]
+#maxJobs = 4 # 8 threads 32GB
+speedFactor = 3
+supportedFeatures = ["kvm","big-parallel","nixos-test"]
+ssh.port = 26
+ssh.publicKeyListen = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDYB9H1pHB1vTBiGhO/GCQjn70BtVdQuJyXx38zN2CDj"
+ssh.publicKeyUser = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIL6eTQkxO/1XflHpGf3478+Z7HFYYaf1d4M6mvSK2nAU root@sopp"
+
+["nord.pbsds.net"]
+maxJobs = 1 # 4 threads 32GB
+speedFactor = 3
+supportedFeatures = ["kvm","big-parallel","nixos-test"]
+ssh.port = 24
+ssh.publicKeyListen = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIBSdIUtUfAxnVbPDmDDFdP2S3Wd3+CC8IfZAANJ76oh"
+ssh.publicKeyUser = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINnS1TmV9q7n+s7+RouuB6vQllnhqNCE1RqPmTMJ2/29 root@nord"
+
+["rocm.pbsds.net"]
+maxJobs = 4 # 16 threads 32GB
+speedFactor = 5
+supportedFeatures = ["kvm","big-parallel"]
+ssh.user = "pbsds"
+ssh.publicKeyListen = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGDuWdqEQ5mmVjuKi6f/Q2PFxuqB3URpgTHid06Vw7we"
+
+["isvegg.pvv.ntnu.no"]
+maxJobs = 1 # 4 threads 16GB
+speedFactor = 2
+ssh.user = "pederbs"
+ssh.publicKeyListen = "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBGurF7rdnrDP/VgIK2Tx38of+bX/QGCGL+alrWnZ1Ca5llGneMulUt1RB9xZzNLHiaWIE+HOP0i4spEaeZhilfU="
+
+["eirin.pvv.ntnu.no"]
+maxJobs = 2 # 8 threads 16GB
+speedFactor = 2
+ssh.user = "pederbs"
+ssh.publicKeyListen = "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBILGULKEzYe5kPorM0rWATv10qq6debfCuYUYqw3HWZm4Y5Pi7mVKcf8lKFNPc1DxT/dStfxxtHj/2fbezaxElk="
+
+["demiurgen.pvv.ntnu.no"]
+maxJobs = 2 # 8 threads 16GB
+speedFactor = 2
+ssh.user = "pederbs"
+ssh.publicKeyListen = "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBKw92q3eB5HZbKJN3p+80MtirqcXPu01USE9LnoGYJuDvko1udjIy4UR0wAwELqgs+r7mJyuQPeXmOZKwjHP6tM="
+
+["hildring.pvv.ntnu.no"]
+ssh.user = "pederbs"
+ssh.publicKeyListen = "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBGurF7rdnrDP/VgIK2Tx38of+bX/QGCGL+alrWnZ1Ca5llGneMulUt1RB9xZzNLHiaWIE+HOP0i4spEaeZhilfU="
+
+["microbel.pvv.ntnu.no"]
+ssh.user = "pederbs"
+ssh.publicKeyListen = "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEq0yasKP0mH6PI6ypmuzPzMnbHELo9k+YB5yW534aKudKZS65YsHJKQ9vapOtmegrn5MQbCCgrshf+/XwZcjbM="
+
+#["bob.pvv.ntnu.no"]
+#maxJobs = 10 # 40 threads

hosts/nord/default.nix

@@ -35,7 +35,7 @@
     ../../profiles/desktop/steam.nix
     ../../profiles/desktop/flatpak.nix
 
-    ../../profiles/remote-builders
+    ../../profiles/remote-builders.nix
     #../../profiles/autossh-reverse-tunnels
     #../../profiles/domeneshop-dyndns # handled by noximilien
   ];

hosts/noximilien/default.nix

@@ -82,7 +82,7 @@
 
     #../../profiles/code-remote # TODO: move into web? services?
     ../../profiles/domeneshop-dyndns
-    ../../profiles/remote-builders
+    ../../profiles/remote-builders.nix
     ../../profiles/autossh-reverse-tunnels
     #../../profiles/xrdp
   ];

hosts/sopp/default.nix

@@ -45,7 +45,7 @@
     ../../profiles/desktop/lutris.nix
     ../../profiles/desktop/flatpak.nix
 
-    ../../profiles/remote-builders
+    ../../profiles/remote-builders.nix
     #../../profiles/autossh-reverse-tunnels
     #../../profiles/domeneshop-dyndns # handled by noximilien
   ];

profiles/remote-builders.nix

@@ -0,0 +1,77 @@
+{}
+/** /
+{ config, lib, ... }:
+
+# TODO: make a remote-build user on nixos boxes, instead of giving access to pbsds
+# TODO: https://exozy.me/quickstart
+# TODO: https://github.com/winterqt/darwin-build-box
+
+let
+  inherit (builtins) map fromTOML readFile elem attrNames;
+  inherit (lib) mkIf;
+
+  hosts' = fromTOML (readFile ../../hosts/known-hosts.toml); # eww
+  hosts = lib.pipe hosts' [
+    (lib.filterAttrs (name: host: name != "default"))
+    (lib.mapAttrs (name: host:
+      lib.recursiveUpdate (hosts'."default" or {}) host
+    ))
+  ];
+  hostNames = attrNames hosts;
+  thisHost = hosts.${config.networking.fqdn};
+  thisHostIsBuilder = thisHost.maxJobs > 0;
+
+  mkRemoteConfig = fqdn: let
+    host = hosts.${fqdn};
+    jump = hosts.${host.ssh.proxyJump};
+    buildMachine = (lib.filterAttrs (key: _: !elem key ["ssh"]) host) // {
+      hostName = fqdn;
+      sshUser = fqdn.ssh.user;
+    };
+    isBuilder = host.maxJobs > 0;
+    isConsumer = host.ssh ? publicKeyUser && thisHostIsBuilder;
+    isThis = fqdn == config.networking.fqdn;
+  in mkIf (!isThis) {
+
+    # out
+    nix.buildMachines = mkIf isBuilder [ buildMachine ];
+    programs.ssh.knownHosts.${fqdn}.publicKey = mkIf isBuilder host.ssh.publicKeyListen;
+
+    # timeout is great when remote is unresponsive. nix doesn't care
+    programs.ssh.extraConfig = ''
+      Host ${fqdn}
+        ConnectTimeout 3
+        Port ${builtins.toString (host.ssh.port or 22)}
+        ${lib.optionalString (host.ssh ? proxyJump) ''
+          ProxyJump ${host.ssh.proxyJump}
+        ''}
+    '';
+
+    # in
+    users = mkIf isConsumer {
+      users.${thisHost.ssh.user} = {
+        isSystemUser = lib.mkDefault (!config.users.users.${thisHost.ssh.user}.isNormalUser);
+        openssh.authorizedKeys.keys = [
+          host.ssh.publicKeyUser
+        ];
+        group = lib.mkDefault "nogroup";
+      };
+    };
+    nix.settings.allowed-users = mkIf isConsumer [ thisHost.ssh.user ];
+    nix.settings.trusted-users = mkIf isConsumer [ thisHost.ssh.user ];
+  };
+
+in {
+
+  nix.distributedBuilds = true;
+
+  # TODO: Allow setting speedFactor for local builds, as local is currently fixed to 0
+  # https://github.com/NixOS/nix/issues/2457
+
+  # useful when the builder has a faster internet connection than i do
+  nix.settings.builders-use-substitutes = true;
+
+  imports = lib.forEach hostNames mkRemoteConfig;
+
+}
+/**/