mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-22 13:41:26 +00:00
96190535e5
This reverts commit 095fe5b43d.
Pointless renames considered harmful. All they do is force people to
spend extra work updating their configs for no benefit, and hindering
the ability to switch between unstable and stable versions of NixOS.
Like, what was the value of having the "nixos." there? I mean, by
definition anything in a NixOS module has something to do with NixOS...
274 lines
8.3 KiB
Nix
274 lines
8.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.postgresql;
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# see description of extraPlugins
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postgresqlAndPlugins = pg:
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if cfg.extraPlugins == [] then pg
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else pkgs.buildEnv {
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name = "postgresql-and-plugins-${(builtins.parseDrvName pg.name).version}";
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paths = [ pg pg.lib ] ++ cfg.extraPlugins;
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buildInputs = [ pkgs.makeWrapper ];
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postBuild =
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''
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mkdir -p $out/bin
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rm $out/bin/{pg_config,postgres,pg_ctl}
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cp --target-directory=$out/bin ${pg}/bin/{postgres,pg_config,pg_ctl}
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wrapProgram $out/bin/postgres --set NIX_PGLIBDIR $out/lib
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'';
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};
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postgresql = postgresqlAndPlugins cfg.package;
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# The main PostgreSQL configuration file.
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configFile = pkgs.writeText "postgresql.conf"
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''
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hba_file = '${pkgs.writeText "pg_hba.conf" cfg.authentication}'
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ident_file = '${pkgs.writeText "pg_ident.conf" cfg.identMap}'
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log_destination = 'stderr'
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listen_addresses = '${if cfg.enableTCPIP then "*" else "localhost"}'
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port = ${toString cfg.port}
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${cfg.extraConfig}
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'';
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in
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{
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###### interface
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options = {
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services.postgresql = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to run PostgreSQL.
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'';
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};
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package = mkOption {
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type = types.package;
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example = literalExample "pkgs.postgresql96";
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description = ''
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PostgreSQL package to use.
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'';
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};
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port = mkOption {
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type = types.int;
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default = 5432;
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description = ''
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The port on which PostgreSQL listens.
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'';
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};
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dataDir = mkOption {
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type = types.path;
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example = "/var/lib/postgresql/9.6";
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description = ''
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Data directory for PostgreSQL.
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'';
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};
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authentication = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Defines how users authenticate themselves to the server. By
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default, "trust" access to local users will always be granted
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along with any other custom options. If you do not want this,
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set this option using "lib.mkForce" to override this
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behaviour.
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'';
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};
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identMap = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Defines the mapping from system users to database users.
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'';
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};
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initialScript = mkOption {
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type = types.nullOr types.path;
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default = null;
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description = ''
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A file containing SQL statements to execute on first startup.
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'';
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};
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enableTCPIP = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether PostgreSQL should listen on all network interfaces.
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If disabled, the database can only be accessed via its Unix
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domain socket or via TCP connections to localhost.
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'';
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};
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extraPlugins = mkOption {
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type = types.listOf types.path;
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default = [];
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example = literalExample "[ (pkgs.postgis.override { postgresql = pkgs.postgresql94; }) ]";
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description = ''
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When this list contains elements a new store path is created.
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PostgreSQL and the elements are symlinked into it. Then pg_config,
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postgres and pg_ctl are copied to make them use the new
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$out/lib directory as pkglibdir. This makes it possible to use postgis
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without patching the .sql files which reference $libdir/postgis-1.5.
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'';
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# Note: the duplication of executables is about 4MB size.
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# So a nicer solution was patching postgresql to allow setting the
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# libdir explicitely.
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};
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extraConfig = mkOption {
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type = types.lines;
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default = "";
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description = "Additional text to be appended to <filename>postgresql.conf</filename>.";
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};
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recoveryConfig = mkOption {
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type = types.nullOr types.lines;
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default = null;
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description = ''
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Contents of the <filename>recovery.conf</filename> file.
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'';
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};
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superUser = mkOption {
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type = types.str;
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default= if versionAtLeast config.system.stateVersion "17.09" then "postgres" else "root";
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internal = true;
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description = ''
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NixOS traditionally used 'root' as superuser, most other distros use 'postgres'.
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From 17.09 we also try to follow this standard. Internal since changing this value
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would lead to breakage while setting up databases.
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'';
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};
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};
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};
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###### implementation
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config = mkIf config.services.postgresql.enable {
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services.postgresql.package =
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# Note: when changing the default, make it conditional on
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# ‘system.stateVersion’ to maintain compatibility with existing
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# systems!
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mkDefault (if versionAtLeast config.system.stateVersion "17.09" then pkgs.postgresql96
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else if versionAtLeast config.system.stateVersion "16.03" then pkgs.postgresql95
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else pkgs.postgresql94);
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services.postgresql.dataDir =
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mkDefault (if versionAtLeast config.system.stateVersion "17.09" then "/var/lib/postgresql/${config.services.postgresql.package.psqlSchema}"
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else "/var/db/postgresql");
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services.postgresql.authentication = mkAfter
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''
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# Generated file; do not edit!
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local all all ident
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host all all 127.0.0.1/32 md5
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host all all ::1/128 md5
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'';
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users.users.postgres =
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{ name = "postgres";
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uid = config.ids.uids.postgres;
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group = "postgres";
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description = "PostgreSQL server user";
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};
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users.groups.postgres.gid = config.ids.gids.postgres;
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environment.systemPackages = [ postgresql ];
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systemd.services.postgresql =
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{ description = "PostgreSQL Server";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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environment.PGDATA = cfg.dataDir;
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path = [ postgresql ];
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preStart =
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''
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# Create data directory.
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if ! test -e ${cfg.dataDir}/PG_VERSION; then
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mkdir -m 0700 -p ${cfg.dataDir}
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rm -f ${cfg.dataDir}/*.conf
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chown -R postgres:postgres ${cfg.dataDir}
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fi
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''; # */
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script =
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''
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# Initialise the database.
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if ! test -e ${cfg.dataDir}/PG_VERSION; then
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initdb -U ${cfg.superUser}
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# See postStart!
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touch "${cfg.dataDir}/.first_startup"
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fi
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ln -sfn "${configFile}" "${cfg.dataDir}/postgresql.conf"
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${optionalString (cfg.recoveryConfig != null) ''
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ln -sfn "${pkgs.writeText "recovery.conf" cfg.recoveryConfig}" \
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"${cfg.dataDir}/recovery.conf"
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''}
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exec postgres
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'';
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serviceConfig =
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{ ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
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User = "postgres";
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Group = "postgres";
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PermissionsStartOnly = true;
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# Shut down Postgres using SIGINT ("Fast Shutdown mode"). See
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# http://www.postgresql.org/docs/current/static/server-shutdown.html
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KillSignal = "SIGINT";
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KillMode = "mixed";
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# Give Postgres a decent amount of time to clean up after
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# receiving systemd's SIGINT.
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TimeoutSec = 120;
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};
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# Wait for PostgreSQL to be ready to accept connections.
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postStart =
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''
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while ! ${pkgs.sudo}/bin/sudo -u ${cfg.superUser} psql --port=${toString cfg.port} -d postgres -c "" 2> /dev/null; do
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if ! kill -0 "$MAINPID"; then exit 1; fi
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sleep 0.1
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done
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if test -e "${cfg.dataDir}/.first_startup"; then
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${optionalString (cfg.initialScript != null) ''
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${pkgs.sudo}/bin/sudo -u ${cfg.superUser} psql -f "${cfg.initialScript}" --port=${toString cfg.port} -d postgres
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''}
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rm -f "${cfg.dataDir}/.first_startup"
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fi
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'';
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unitConfig.RequiresMountsFor = "${cfg.dataDir}";
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};
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};
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meta.doc = ./postgresql.xml;
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}
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