Merge pull request #26907 from volth/vault

vault: 0.6.5 -> 0.7.3 with service

3 files changed, 146 insertions, 0 deletions

diff --git a/nixos/modules/misc/ids.nix b/nixos/modules/misc/ids.nix
index 5ac5764cd7cb..84d89510679c 100644
--- a/nixos/modules/misc/ids.nix
+++ b/nixos/modules/misc/ids.nix
@@ -139,6 +139,7 @@
       btsync = 113;
       minecraft = 114;
       #monetdb = 115; # unused (not packaged), removed 2016-09-19
+      vault = 115;
       rippled = 116;
       murmur = 117;
       foundationdb = 118;
@@ -415,6 +416,7 @@
       btsync = 113;
       #minecraft = 114; # unused
       #monetdb = 115; # unused (not packaged), removed 2016-09-19
+      vault = 115;
       #ripped = 116; # unused
       #murmur = 117; # unused
       foundationdb = 118;
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 3aeb1225ae5a..1f2fbb7d85c9 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -558,6 +558,7 @@
   ./services/security/tor.nix
   ./services/security/torify.nix
   ./services/security/torsocks.nix
+  ./services/security/vault.nix
   ./services/system/cgmanager.nix
   ./services/system/cloud-init.nix
   ./services/system/dbus.nix
diff --git a/nixos/modules/services/security/vault.nix b/nixos/modules/services/security/vault.nix
new file mode 100644
index 000000000000..146afec344ab
--- /dev/null
+++ b/nixos/modules/services/security/vault.nix
@@ -0,0 +1,143 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+let
+  cfg = config.services.vault;
+
+  configFile = pkgs.writeText "vault.hcl" ''
+    listener "tcp" {
+      address = "${cfg.address}"
+      ${if (cfg.tlsCertFile == null || cfg.tlsKeyFile == null) then ''
+          tls_disable = "true"
+        '' else ''
+          tls_cert_file = "${cfg.tlsCertFile}"
+          tls_key_file = "${cfg.tlsKeyFile}"
+        ''}
+      ${cfg.listenerExtraConfig}
+    }
+    storage "${cfg.storageBackend}" {
+      ${optionalString (cfg.storagePath   != null) ''path = "${cfg.storagePath}"''}
+      ${optionalString (cfg.storageConfig != null) cfg.storageConfig}
+    }
+    ${optionalString (cfg.telemetryConfig != "") ''
+        telemetry {
+          ${cfg.telemetryConfig}
+        }
+      ''}
+  '';
+in
+{
+  options = {
+
+    services.vault = {
+
+      enable = mkEnableOption "Vault daemon";
+
+      address = mkOption {
+        type = types.str;
+        default = "127.0.0.1:8200";
+        description = "The name of the ip interface to listen to";
+      };
+
+      tlsCertFile = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        example = "/path/to/your/cert.pem";
+        description = "TLS certificate file. TLS will be disabled unless this option is set";
+      };
+
+      tlsKeyFile = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        example = "/path/to/your/key.pem";
+        description = "TLS private key file. TLS will be disabled unless this option is set";
+      };
+
+      listenerExtraConfig = mkOption {
+        type = types.lines;
+        default = ''
+          tls_min_version = "tls12"
+        '';
+        description = "extra configuration";
+      };
+
+      storageBackend = mkOption {
+        type = types.enum [ "inmem" "file" "consul" "zookeeper" "s3" "azure" "dynamodb" "etcd" "mssql" "mysql" "postgresql" "swift" "gcs" ];
+        default = "inmem";
+        description = "The name of the type of storage backend";
+      };
+
+      storagePath = mkOption {
+        type = types.nullOr types.path;
+        default = if cfg.storageBackend == "file" then "/var/lib/vault" else null;
+        description = "Data directory for file backend";
+      };
+
+      storageConfig = mkOption {
+        type = types.nullOr types.lines;
+        default = null;
+        description = "Storage configuration";
+      };
+
+      telemetryConfig = mkOption {
+        type = types.lines;
+        default = "";
+        description = "Telemetry configuration";
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    assertions = [
+      { assertion = cfg.storageBackend == "inmem" -> (cfg.storagePath == null && cfg.storageConfig == null);
+        message = ''The "inmem" storage expects no services.vault.storagePath nor services.vault.storageConfig'';
+      }
+      { assertion = (cfg.storageBackend == "file" -> (cfg.storagePath != null && cfg.storageConfig == null)) && (cfg.storagePath != null -> cfg.storageBackend == "file");
+        message = ''You must set services.vault.storagePath only when using the "file" backend'';
+      }
+    ];
+
+    users.extraUsers.vault = {
+      name = "vault";
+      group = "vault";
+      uid = config.ids.uids.vault;
+      description = "Vault daemon user";
+    };
+    users.extraGroups.vault.gid = config.ids.gids.vault;
+
+    systemd.services.vault = {
+      description = "Vault server daemon";
+
+      wantedBy = ["multi-user.target"];
+      after = [ "network.target" ]
+           ++ optional (config.services.consul.enable && cfg.storageBackend == "consul") "consul.service";
+
+      restartIfChanged = false; # do not restart on "nixos-rebuild switch". It would seal the storage and disrupt the clients.
+
+      preStart = optionalString (cfg.storagePath != null) ''
+        install -d -m0700 -o vault -g vault "${cfg.storagePath}"
+      '';
+
+      serviceConfig = {
+        User = "vault";
+        Group = "vault";
+        PermissionsStartOnly = true;
+        ExecStart = "${pkgs.vault}/bin/vault server -config ${configFile}";
+        PrivateDevices = true;
+        PrivateTmp = true;
+        ProtectSystem = "full";
+        ProtectHome = "read-only";
+        AmbientCapabilities = "cap_ipc_lock";
+        NoNewPrivileges = true;
+        KillSignal = "SIGINT";
+        TimeoutStopSec = "30s";
+        Restart = "on-failure";
+        StartLimitInterval = "60s";
+        StartLimitBurst = 3;
+      };
+
+      unitConfig.RequiresMountsFor = optional (cfg.storagePath != null) cfg.storagePath;
+    };
+  };
+
+}