Set the serial console to ttyS1 in raccoon

Apparently the ttyS0 console doesn't exist but ttyS1 does:

  raccoon% sudo stty -F /dev/ttyS0
  stty: /dev/ttyS0: Input/output error
  raccoon% sudo stty -F /dev/ttyS1
  speed 9600 baud; line = 0;
  -brkint -imaxbel

The dmesg line agrees:

  00:03: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A

The console configuration is then moved from base to xeon to allow
changing it for the raccoon machine.

doc/install.md

@@ -151,12 +151,26 @@ And update grub.
 # nix build .#nixosConfigurations.xeon02.config.system.build.kexecTree -v
 ```
 
-## Chain NixOS in same disk
+## Chain NixOS in same disk with other systems
+
+To install NixOS on a partition along another system which controls the GRUB,
+first disable the grub device, so the GRUB is not installed in the disk by
+NixOS (only the /boot files will be generated):
+
+```
+boot.loader.grub.device = "nodev";
+```
+
+Then add the following entry to the old GRUB configuration:
 
 ```
 menuentry 'NixOS' {
         insmod chain
-        set root=(hd3,1)
+        search --no-floppy --label nixos --set root
         configfile /boot/grub/grub.cfg
 }
 ```
+
+The partition with NixOS must have the label "nixos" for it to be found. New
+system configuration entries will be stored in the GRUB configuration managed
+by NixOS, so there is no need to change the old GRUB settings.

flake.lock

@@ -10,11 +10,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1712079060,
+        "lastModified": 1720546205,
-        "narHash": "sha256-/JdiT9t+zzjChc5qQiF+jhrVhRt8figYH29rZO7pFe4=",
+        "narHash": "sha256-boCXsjYVxDviyzoEyAk624600f3ZBo/DKtUdvMTpbGY=",
         "owner": "ryantm",
         "repo": "agenix",
-        "rev": "1381a759b205dff7a6818733118d02253340fd5e",
+        "rev": "de96bd907d5fbc3b14fc33ad37d1b9a3cb15edc6",
         "type": "github"
       },
       "original": {
@@ -88,11 +88,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1713714899,
+        "lastModified": 1720957393,
-        "narHash": "sha256-+z/XjO3QJs5rLE5UOf015gdVauVRQd2vZtsFkaXBq2Y=",
+        "narHash": "sha256-oedh2RwpjEa+TNxhg5Je9Ch6d3W1NKi7DbRO1ziHemA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "6143fc5eeb9c4f00163267708e26191d1e918932",
+        "rev": "693bc46d169f5af9c992095736e82c3488bf7dbb",
         "type": "github"
       },
       "original": {

m/common/base.nix

@@ -3,6 +3,7 @@
   # Includes the basic configuration for an Intel server.
   imports = [
     ./base/agenix.nix
+    ./base/august-shutdown.nix
     ./base/boot.nix
     ./base/env.nix
     ./base/fs.nix

m/common/base/august-shutdown.nix

@@ -0,0 +1,14 @@
+{
+  # Shutdown all machines on August 2nd at 11:00 AM, so we can protect the
+  # hardware from spurious electrical peaks on the yearly electrical cut for
+  # manteinance that starts on August 4th.
+  systemd.timers.august-shutdown = {
+    description = "Shutdown on August 2nd for maintenance";
+    wantedBy = [ "timers.target" ];
+    timerConfig = {
+      OnCalendar = "*-08-02 11:00:00";
+      RandomizedDelaySec = "10min";
+      Unit = "systemd-poweroff.service";
+    };
+  };
+}

m/common/base/boot.nix

@@ -11,14 +11,12 @@
     terminal_output --append serial
   '';
 
-  # Enable serial console
-  boot.kernelParams = [
-    "console=tty1"
-    "console=ttyS0,115200"
-  ];
-
   boot.kernel.sysctl = {
     "kernel.perf_event_paranoid" = lib.mkDefault "-1";
+
+    # Allow ptracing (i.e. attach with GDB) any process of the same user, see:
+    # https://www.kernel.org/doc/Documentation/security/Yama.txt
+    "kernel.yama.ptrace_scope" = "0";
   };
 
   boot.kernelPackages = pkgs.linuxPackages_latest;

m/common/base/ssh.nix

@@ -12,7 +12,7 @@ in
   programs.ssh.extraConfig = ''
     Host bscpm02.bsc.es bscpm03.bsc.es gitlab-internal.bsc.es alya.gitlab.bsc.es
       User git
-      ProxyCommand nc -X connect -x localhost:23080 %h %p
+      ProxyCommand nc -X connect -x hut:23080 %h %p
   '';
 
   programs.ssh.knownHosts = hostsKeys // {

m/common/base/users.nix

@@ -55,7 +55,7 @@
         home = "/home/Computational/rpenacob";
         description = "Raúl Peñacoba";
         group = "Computational";
-        hosts = [ "hut" ];
+        hosts = [ "owl1" "owl2" "hut" ];
         hashedPassword = "$6$TZm3bDIFyPrMhj1E$uEDXoYYd1z2Wd5mMPfh3DZAjP7ztVjJ4ezIcn82C0ImqafPA.AnTmcVftHEzLB3tbe2O4SxDyPSDEQgJ4GOtj/";
         openssh.authorizedKeys.keys = [
           "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFYfXg37mauGeurqsLpedgA2XQ9d4Nm0ZGo/hI1f7wwH rpenacob@bsc"
@@ -75,6 +75,19 @@
         ];
       };
 
+      abonerib = {
+        uid = 4541;
+        isNormalUser = true;
+        home = "/home/Computational/abonerib";
+        description = "Aleix Boné";
+        group = "Computational";
+        hosts = [ "owl1" "owl2" "hut" "raccoon" ];
+        hashedPassword = "$6$V1EQWJr474whv7XJ$OfJ0wueM2l.dgiJiiah0Tip9ITcJ7S7qDvtSycsiQ43QBFyP4lU0e0HaXWps85nqB4TypttYR4hNLoz3bz662/";
+        openssh.authorizedKeys.keys = [
+          "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIIFiqXqt88VuUfyANkZyLJNiuroIITaGlOOTMhVDKjf abonerib@bsc"
+        ];
+      };
+
       vlopez = {
         uid = 4334;
         isNormalUser = true;

m/common/xeon.nix

@@ -3,7 +3,7 @@
   imports = [
     ./base.nix
     ./xeon/fs.nix
-    ./xeon/getty.nix
+    ./xeon/console.nix
     ./xeon/net.nix
   ];
 }

m/common/xeon/console.nix

@@ -5,4 +5,10 @@
     wantedBy = [ "getty.target" ];
     serviceConfig.Restart = "always";
   };
+
+  # Enable serial console
+  boot.kernelParams = [
+    "console=tty1"
+    "console=ttyS0,115200"
+  ];
 }

m/common/xeon/net.nix

@@ -10,7 +10,7 @@
     nameservers = ["8.8.8.8"];
 
     proxy = {
-      default = "http://localhost:23080/";
+      default = "http://hut:23080/";
       noProxy = "127.0.0.1,localhost,internal.domain,10.0.40.40";
       # Don't set all_proxy as go complains and breaks the gitlab runner, see:
       # https://github.com/golang/go/issues/16715

m/hut/configuration.nix

@@ -6,6 +6,7 @@
 
     ../module/ceph.nix
     ../module/debuginfod.nix
+    ../module/emulation.nix
     ../module/slurm-client.nix
     ./gitlab-runner.nix
     ./monitoring.nix
@@ -19,8 +20,6 @@
     #./pxe.nix
   ];
 
-  boot.binfmt.emulatedSystems = [ "armv7l-linux" "aarch64-linux" "powerpc64le-linux" "riscv64-linux" ];
-
   # Select the this using the ID to avoid mismatches
   boot.loader.grub.device = "/dev/disk/by-id/ata-INTEL_SSDSC2BB240G7_PHDV6462004Y240AGN";
 
@@ -34,5 +33,15 @@
       address = "10.0.42.7";
       prefixLength = 24;
     } ];
+    firewall = {
+      extraCommands = ''
+        # Accept all proxy traffic from compute nodes but not the login
+        iptables -A nixos-fw -p tcp -s 10.0.40.30 --dport 23080 -j nixos-fw-log-refuse
+        iptables -A nixos-fw -p tcp -s 10.0.40.0/24 --dport 23080 -j nixos-fw-accept
+      '';
     };
+  };
+
+  # Allow proxy to bind to the ethernet interface
+  services.openssh.settings.GatewayPorts = "clientspecified";
 }

m/hut/gitea.nix

@@ -17,6 +17,7 @@
         REGISTER_MANUAL_CONFIRM = true;
         ENABLE_NOTIFY_MAIL = true;
       };
+      log.LEVEL = "Warn";
 
       mailer = {
         ENABLED       = true;

m/hut/gitlab-runner.nix

@@ -1,9 +1,8 @@
 { pkgs, lib, config, ... }:
 
 {
-  age.secrets.ovniToken.file = ../../secrets/ovni-token.age;
+  age.secrets.gitlabRunnerShellToken.file = ../../secrets/gitlab-runner-shell-token.age;
-  age.secrets.gitlabToken.file = ../../secrets/gitlab-bsc-es-token.age;
+  age.secrets.gitlabRunnerDockerToken.file = ../../secrets/gitlab-runner-docker-token.age;
-  age.secrets.nosvToken.file = ../../secrets/nosv-token.age;
 
   services.gitlab-runner = {
     enable = true;
@@ -11,20 +10,14 @@
     services = let
       common-shell = {
         executor = "shell";
-        tagList = [ "nix" "xeon" ];
-        registrationFlags = [
-          # Using space doesn't work, and causes it to misread the next flag
-          "--locked='false'"
-        ];
         environmentVariables = {
           SHELL = "${pkgs.bash}/bin/bash";
         };
       };
       common-docker = {
+        executor = "docker";
         dockerImage = "debian:stable";
-        tagList = [ "docker" "xeon" ];
         registrationFlags = [
-          "--locked='false'"
           "--docker-network-mode host"
         ];
         environmentVariables = {
@@ -33,19 +26,12 @@
         };
       };
     in {
-      # For gitlab.bsc.es
-      gitlab-bsc-es-shell = common-shell // {
-        registrationConfigFile = config.age.secrets.gitlabToken.path;
-      };
-      gitlab-bsc-es-docker = common-docker // {
-        registrationConfigFile = config.age.secrets.gitlabToken.path;
-      };
       # For pm.bsc.es/gitlab
       gitlab-pm-shell = common-shell // {
-        registrationConfigFile = config.age.secrets.ovniToken.path;
+        authenticationTokenConfigFile = config.age.secrets.gitlabRunnerShellToken.path;
       };
       gitlab-pm-docker = common-docker // {
-        registrationConfigFile = config.age.secrets.ovniToken.path;
+        authenticationTokenConfigFile = config.age.secrets.gitlabRunnerDockerToken.path;
       };
     };
   };

m/hut/monitoring.nix

@@ -31,6 +31,7 @@
       };
       feature_toggles.publicDashboards = true;
       "auth.anonymous".enabled = true;
+      log.level = "warn";
     };
   };
 

m/module/emulation.nix

@@ -0,0 +1,3 @@
+{
+  boot.binfmt.emulatedSystems = [ "armv7l-linux" "aarch64-linux" "powerpc64le-linux" "riscv64-linux" ];
+}

m/module/slurm-client.nix

@@ -47,8 +47,8 @@ in {
     ];
 
     partitionName = [
-      "owl Nodes=owl[1-2] Default=YES MaxTime=INFINITE State=UP"
+      "owl Nodes=owl[1-2] Default=YES DefaultTime=01:00:00 MaxTime=INFINITE State=UP"
-      "all Nodes=owl[1-2],hut Default=NO MaxTime=INFINITE State=UP"
+      "all Nodes=owl[1-2],hut Default=NO DefaultTime=01:00:00 MaxTime=INFINITE State=UP"
     ];
 
     # See slurm.conf(5) for more details about these options.
@@ -83,6 +83,14 @@ in {
 
       # Reduce port range so we can allow only this range in the firewall
       SrunPortRange=60000-61000
+
+      # Use cores as consumable resources. In SLURM terms, a core may have
+      # multiple hardware threads (or CPUs).
+      SelectType=select/cons_tres
+
+      # Ignore memory constraints and only use unused cores to share a node with
+      # other jobs.
+      SelectTypeParameters=CR_CORE
     '';
   };
 

m/owl1/configuration.nix

@@ -4,9 +4,10 @@
   imports = [
     ../common/xeon.nix
     ../module/ceph.nix
+    ../module/emulation.nix
     ../module/slurm-client.nix
     ../module/slurm-firewall.nix
-    ../module/slurm-hut-nix-store.nix
+    ../module/debuginfod.nix
   ];
 
   # Select the this using the ID to avoid mismatches

m/owl2/configuration.nix

@@ -4,9 +4,10 @@
   imports = [
     ../common/xeon.nix
     ../module/ceph.nix
+    ../module/emulation.nix
     ../module/slurm-client.nix
     ../module/slurm-firewall.nix
-    ../module/slurm-hut-nix-store.nix
+    ../module/debuginfod.nix
   ];
 
   # Select the this using the ID to avoid mismatches

m/raccoon/configuration.nix

@@ -8,6 +8,12 @@
   # Don't install Grub on the disk yet
   boot.loader.grub.device = "nodev";
 
+  # Enable serial console
+  boot.kernelParams = [
+    "console=tty1"
+    "console=ttyS1,115200"
+  ];
+
   networking = {
     hostName = "raccoon";
     # Only BSC DNSs seem to be reachable from the office VLAN
@@ -21,11 +27,7 @@
 
   # Configure Nvidia driver to use with CUDA
   hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.production;
-  hardware.opengl = {
+  hardware.graphics.enable = true;
-    enable = true;
-    driSupport = true;
-    setLdLibraryPath = true;
-  };
   nixpkgs.config.allowUnfree = true;
   nixpkgs.config.nvidia.acceptLicense = true;
   services.xserver.videoDrivers = [ "nvidia" ];

secrets/gitlab-bsc-es-token.age

@@ -1,11 +0,0 @@
-age-encryption.org/v1
--> ssh-ed25519 HY2yRg caTbx0NBmsTSmZH4HtBaxhsauWqWUDTesJqT08UsoEQ
-8ND31xuco+H8d5SKg8xsCFRPVDhU4d8UKwV1BnmKVjQ
--> ssh-ed25519 CAWG4Q 4ETYuhCwHHECkut4DWDknMMgpAvFqtzLWVC2Wi2L8FM
-BGMvRnAfd8qZG5hzLefmk32FkGvwzE9pqBUyx4JY0co
--> ssh-ed25519 MSF3dg hj5QL4ZfylN8/W/MXQHvVqtI7mRvlQOYr8HsaQEmPB0
-kvB7sljmmkswSGZDQnrwdTbTsN78EAwH3pz1pPe0Hu0
--> )Q-grease vHF} [8p1> @7z;C"/
-tgSUKFyyrf2jLXZp+pakigwB2fRO/WFj2Qnt1aPjtVPEK92JbJ4
---- xzM0AhV4gTQE0Q7inJNo9vFj+crJQxWeI7u9pl7bqAI
-á6nGJÖ0Bˆ’7F° –bßÙ½2®L³äÇ]²2zl<7A>À&e†KÄx®àé9SWNàV"MfŽ€ëÙKHUC:1b;9St‰ëõ±Duѧç‹Ï¢žÌŸ¡<02>èÐéîÀ–<C380>ÔfÕ7¨î1§I(õdÓþô‡ïó

secrets/gitlab-runner-docker-token.age

@@ -0,0 +1,9 @@
+age-encryption.org/v1
+-> ssh-ed25519 HY2yRg WvKK6U1wQtx2pbUDfuaUIXTQiCulDkz7hgUCSwMfMzQ
+jLktUMqKuVxukqzz++pHOKvmucUQqeKYy5IwBma7KxY
+-> ssh-ed25519 CAWG4Q XKGuNNoYFl9bdZzsqYYTY7GsEt5sypLW4R+1uk78NmU
+8dIA2GzRAwTGM5CDHSM2BUBsbXzEAUssWUz2PY2PaTg
+-> ssh-ed25519 MSF3dg T630RsKuZIF/bp+KITnIIWWHsg6M/VQGqbWQZxqT+AA
+SraZcgZJVtmUzHF/XR9J7aK5t5EDNpkC/av/WJUT/G8
+--- /12G8pj9sbs591OM/ryhoLnSWWmzYcoqprk9uN/3g18
+ä·ù
¼Â‡%å]yi"ô<>»LÓâùH`ªa$Æþ)¦9ve<76>.0úmÉK<EFBFBD>vƒÀïu"|1cÞ-%ÔÕ"åWFï¡ÞA«<41>hº$•ºj<eñ¶xÅLx«ç.?œÈâ:L…¬–ƒ,ëu»|³‹F|Õi²äÔ

secrets/nosv-token.age

@@ -1,11 +0,0 @@
-age-encryption.org/v1
--> ssh-ed25519 HY2yRg hrdS7Dl/j+u3XVfM79ZJpZSlre9TcD7DTQ+EEAT6kEE
-avUO96P1h7w2BYWgrQ7GpUgdaCV9AZL7eOTTcF9gfro
--> ssh-ed25519 CAWG4Q A5raRY1CAgFYZgoQ92GMyNejYNdHx/7Y6uTS+EjLPWA
-FRFqT2Jz7qRcybaxkQTKHGl797LVXoHpYG4RZSrX/70
--> ssh-ed25519 MSF3dg D+R80Bg7W9AuiOMAqtGFZQl994dRBIegYRLmmTaeZ3o
-BHvZsugRiuZ91b4jk91h30o3eF3hadSnVCwxXge95T8
--> BT/El`a-grease W{nq|Vm )bld 2Nl}4 N$#JGB4t
-oLG+0S1aGfO/ohCfgGmhDhwwLi4H
---- 2I5C+FvBG/K1ZHh7C5QD39feTSLoFGwcTeZAmeILNsI
-¹õW©o÷ ÙÄd;ËÐC¾.¹¡_(“u
G¡€‰#ìvâœgÉ<67>†õõy¹Y‰žl9ŒÈ
¡Ïµ.Œé0x<30>Þ½úN. /ü<>tB×b‡ü¼K¼ì:Q×—È\¹ÀÍT_´»Átxïm’——_JñÞž-š

secrets/secrets.nix

@@ -6,10 +6,9 @@ let
   safe = keys.hostGroup.safe ++ adminsKeys;
 in
 {
-  "gitlab-bsc-es-token.age".publicKeys = hut;
   "gitea-runner-token.age".publicKeys = hut;
-  "ovni-token.age".publicKeys = hut;
+  "gitlab-runner-docker-token.age".publicKeys = hut;
-  "nosv-token.age".publicKeys = hut;
+  "gitlab-runner-shell-token.age".publicKeys = hut;
   "nix-serve.age".publicKeys = hut;
   "jungle-robot-password.age".publicKeys = hut;