commit 105b9eb1b80273060627267f91e448fe00277d75 · pyrox.dev/nixpkgs

+43 -19

nixos/modules/services/networking/nomad.nix

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               description = ''

     

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                 Configuration for Nomad. See the <link xlink:href="https://www.nomadproject.io/docs/configuration">documentation</link>

     

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                 for supported values.

     

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       +
       

     

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                 Notes about <literal>data_dir</literal>:

     

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                 If <literal>data_dir</literal> is set to a value other than the

     

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                 default value of <literal>"/var/lib/nomad"</literal> it is the Nomad

     

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                 cluster manager's responsibility to make sure that this directory

     

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                 exists and has the appropriate permissions.

     

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                 Additionally, if <literal>dropPrivileges</literal> is

     

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                 <literal>true</literal> then <literal>data_dir</literal>

     

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                 <emphasis>cannot</emphasis> be customized. Setting

     

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                 <literal>dropPrivileges</literal> to <literal>true</literal> enables

     

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                 the <literal>DynamicUser</literal> feature of systemd which directly

     

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                 manages and operates on <literal>StateDirectory</literal>.

     

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               '';

     

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               example = literalExample ''

     

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                 {

     
···

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               iptables

     

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             ]);

     

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             serviceConfig = {

     

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               DynamicUser = cfg.dropPrivileges;

     

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               ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";

     

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               ExecStart = "${cfg.package}/bin/nomad agent -config=/etc/nomad.json" +

     

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                 concatMapStrings (path: " -config=${path}") cfg.extraSettingsPaths;

     

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               KillMode = "process";

     

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               KillSignal = "SIGINT";

     

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               LimitNOFILE = 65536;

     

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               LimitNPROC = "infinity";

     

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               OOMScoreAdjust = -1000;

     

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               Restart = "on-failure";

     

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               RestartSec = 2;

     

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               # Agrees with the default `data_dir = "/var/lib/nomad"` in `settings` above.

     

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               StateDirectory = "nomad";

     

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               TasksMax = "infinity";

     

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               User = optionalString cfg.dropPrivileges "nomad";

     

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             } // (optionalAttrs cfg.enableDocker {

     

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               SupplementaryGroups = "docker"; # space-separated string

     

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             });

     

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             serviceConfig = mkMerge [

     

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               {

     

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                 DynamicUser = cfg.dropPrivileges;

     

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                 ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";

     

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                 ExecStart = "${cfg.package}/bin/nomad agent -config=/etc/nomad.json" +

     

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                   concatMapStrings (path: " -config=${path}") cfg.extraSettingsPaths;

     

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                 KillMode = "process";

     

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                 KillSignal = "SIGINT";

     

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                 LimitNOFILE = 65536;

     

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                 LimitNPROC = "infinity";

     

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                 OOMScoreAdjust = -1000;

     

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                 Restart = "on-failure";

     

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                 RestartSec = 2;

     

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                 TasksMax = "infinity";

     

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               }

     

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               (mkIf cfg.enableDocker {

     

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                 SupplementaryGroups = "docker"; # space-separated string

     

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               })

     

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               (mkIf (cfg.settings.data_dir == "/var/lib/nomad") {

     

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                 StateDirectory = "nomad";

     

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               })

     

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             ];

     

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             unitConfig = {

     

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               StartLimitIntervalSec = 10;

     

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               StartLimitBurst = 3;

     

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             };

     

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           };

     

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       +
       

     

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           assertions = [

     

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             {

     

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               assertion = cfg.dropPrivileges -> cfg.settings.data_dir == "/var/lib/nomad";

     

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               message = "settings.data_dir must be equal to \"/var/lib/nomad\" if dropPrivileges is true";

     

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             }

     

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           ];

     

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           # Docker support requires the Docker daemon to be running.

     

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           virtualisation.docker.enable = mkIf cfg.enableDocker true;

+56 -12

nixos/tests/nomad.nix

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         { lib, ... }: {

     

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           name = "nomad";

     

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           nodes = {

     

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             server = { pkgs, lib, ... }: {

     

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             default_server = { pkgs, lib, ... }: {

     

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               networking = {

     

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                 interfaces.eth1.ipv4.addresses = lib.mkOverride 0 [{

     

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                   address = "192.168.1.1";

     
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                 enableDocker = false;

     

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               };

     

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             };

     

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             custom_state_dir_server = { pkgs, lib, ... }: {

     

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               networking = {

     

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                 interfaces.eth1.ipv4.addresses = lib.mkOverride 0 [{

     

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                   address = "192.168.1.1";

     

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                   prefixLength = 16;

     

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                 }];

     

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               };

     

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               environment.etc."nomad.custom.json".source =

     

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                 (pkgs.formats.json { }).generate "nomad.custom.json" {

     

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                   region = "universe";

     

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                   datacenter = "earth";

     

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                 };

     

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               services.nomad = {

     

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                 enable = true;

     

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                 dropPrivileges = false;

     

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                 settings = {

     

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                   data_dir = "/nomad/data/dir";

     

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                   server = {

     

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                     enabled = true;

     

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                     bootstrap_expect = 1;

     

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                   };

     

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                 };

     

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                 extraSettingsPaths = [ "/etc/nomad.custom.json" ];

     

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                 enableDocker = false;

     

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               };

     

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               systemd.services.nomad.serviceConfig.ExecStartPre = "${pkgs.writeShellScript "mk_data_dir" ''

     

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                 set -euxo pipefail

     

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                 ${pkgs.coreutils}/bin/mkdir -p /nomad/data/dir

     

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               ''}";

     

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             };

     

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           };

     

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           testScript = ''

     

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             server.wait_for_unit("nomad.service")

     

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             def test_nomad_server(server):

     

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                 server.wait_for_unit("nomad.service")

     

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             # wait for healthy server

     

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             server.wait_until_succeeds(

     

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                 "[ $(nomad operator raft list-peers | grep true | wc -l) == 1 ]"

     

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             )

     

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                 # wait for healthy server

     

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                 server.wait_until_succeeds(

     

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                     "[ $(nomad operator raft list-peers | grep true | wc -l) == 1 ]"

     

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                 )

     

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             # wait for server liveness

     

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             server.succeed("[ $(nomad server members | grep -o alive | wc -l) == 1 ]")

     

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                 # wait for server liveness

     

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                 server.succeed("[ $(nomad server members | grep -o alive | wc -l) == 1 ]")

     

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                 # check the region

     

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                 server.succeed("nomad server members | grep -o universe")

     

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                 # check the datacenter

     

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                 server.succeed("[ $(nomad server members | grep -o earth | wc -l) == 1 ]")

     

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             # check the region

     

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             server.succeed("nomad server members | grep -o universe")

     

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             servers = [default_server, custom_state_dir_server]

     

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             # check the datacenter

     

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             server.succeed("[ $(nomad server members | grep -o earth | wc -l) == 1 ]")

     

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             for server in servers:

     

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                 test_nomad_server(server)

     

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           '';

     

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         }

     

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       )