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feat: refactored database configuration

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This commit is contained in:
Leyla Becker 2025-10-27 03:55:09 -05:00
parent e57c1df6e5
commit f9c27c82b6
8 changed files with 229 additions and 204 deletions
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108
modules/nixos-modules/server/postgres/postgres.nix
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@ -4,70 +4,94 @@
pkgs,
...
}: let
adminUsers = lib.lists.filter (user: user.isAdmin) (lib.attrsets.mapAttrsToList (_: user: user) config.host.postgres.extraUsers);
clientUsers = lib.lists.filter (user: user.isClient) (lib.attrsets.mapAttrsToList (_: user: user) config.host.postgres.extraUsers);
createUsers = lib.lists.filter (user: user.createUser) (lib.attrsets.mapAttrsToList (_: user: user) config.host.postgres.extraUsers);
createDatabases = lib.attrsets.mapAttrsToList (_: user: user) config.host.postgres.extraDatabases;
enabledDatabases = lib.filterAttrs (_: db: db.enable) config.services.postgresql.databases;
extraDatabasesList = config.services.postgresql.extraDatabases;
serviceDatabaseUsers = lib.mapAttrsToList (_: db: {
name = db.user;
ensureDBOwnership = true;
}) (lib.filterAttrs (_: db: db.ensureUser) enabledDatabases);
extraDatabaseUsers =
builtins.map (dbName: {
name = dbName;
ensureDBOwnership = true;
})
extraDatabasesList;
serviceDatabases = lib.mapAttrsToList (_: db: db.database) enabledDatabases;
extraDatabaseNames = extraDatabasesList;
serviceUserMappings = lib.mapAttrsToList (_: db: "user_map ${db.user} ${db.user}") enabledDatabases;
extraUserMappings = builtins.map (dbName: "user_map ${dbName} ${dbName}") extraDatabasesList;
builtinServiceMappings = let
forgejoMapping = lib.optional (config.services.forgejo.enable && config.services.forgejo.database.type == "postgres") "user_map forgejo forgejo";
immichMapping = lib.optional (config.services.immich.enable && config.services.immich.database.enable) "user_map immich immich";
paperlessMapping = lib.optional (config.services.paperless.enable && config.services.paperless.database.createLocally) "user_map paperless paperless";
in
forgejoMapping ++ immichMapping ++ paperlessMapping;
in {
options = {
host.postgres = {
enable = lib.mkEnableOption "enable postgres";
extraUsers = lib.mkOption {
services.postgresql = {
databases = lib.mkOption {
type = lib.types.attrsOf (lib.types.submodule ({name, ...}: {
options = {
name = lib.mkOption {
enable = lib.mkOption {
type = lib.types.bool;
default = false;
description = "Whether to create this database and user";
};
user = lib.mkOption {
type = lib.types.str;
default = name;
description = "Database user name";
};
isAdmin = lib.mkOption {
type = lib.types.bool;
default = false;
database = lib.mkOption {
type = lib.types.str;
default = name;
description = "Database name";
};
isClient = lib.mkOption {
ensureUser = lib.mkOption {
type = lib.types.bool;
default = false;
};
createUser = lib.mkOption {
type = lib.types.bool;
default = false;
default = true;
description = "Whether to ensure the user exists";
};
};
}));
default = {};
description = "Databases to create for services";
};
extraDatabases = lib.mkOption {
type = lib.types.attrsOf (lib.types.submodule ({name, ...}: {
options = {
name = lib.mkOption {
type = lib.types.str;
default = name;
};
};
}));
default = {};
type = lib.types.listOf lib.types.str;
default = [];
description = "Additional databases to create (user name will match database name)";
example = ["custom_db" "test_db"];
};
adminUsers = lib.mkOption {
type = lib.types.listOf lib.types.str;
default = [];
description = "System users who should have PostgreSQL superuser access";
example = ["leyla" "admin"];
};
};
};
config = lib.mkIf config.host.postgres.enable {
config = lib.mkIf config.services.postgresql.enable {
services = {
postgresql = {
enable = true;
package = pkgs.postgresql_16;
ensureUsers =
[
{
name = "postgres";
}
{name = "postgres";}
]
++ (
builtins.map (user: {
name = user.name;
ensureDBOwnership = true;
})
createUsers
);
ensureDatabases = builtins.map (database: database.name) createDatabases;
++ serviceDatabaseUsers ++ extraDatabaseUsers;
ensureDatabases = serviceDatabases ++ extraDatabaseNames;
identMap =
''
# ArbitraryMapName systemUser DBUser
@ -77,16 +101,16 @@ in {
superuser_map postgres postgres
''
+ (
lib.strings.concatLines (builtins.map (user: "superuser_map ${user.name} postgres") adminUsers)
lib.strings.concatLines (builtins.map (user: "superuser_map ${user} postgres") config.services.postgresql.adminUsers)
)
+ ''
# Client Users
''
+ (
lib.strings.concatLines (builtins.map (user: "user_map ${user.name} ${user.name}") clientUsers)
lib.strings.concatLines (serviceUserMappings ++ extraUserMappings ++ builtinServiceMappings)
);
# configuration here lets users access the db that matches their name and lets user postgres access everything
authentication = pkgs.lib.mkOverride 10 ''
# type database DBuser origin-address auth-method optional_ident_map
local all postgres peer map=superuser_map