167 lines
4 KiB
Nix
167 lines
4 KiB
Nix
{pkgs, config, ...}:
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let
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inherit (pkgs.lib) mkOption mkIf singleton;
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cfg = config.services.postgresql;
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postgresql = pkgs.postgresql;
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startDependency = if config.services.gw6c.enable then
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"gw6c" else "network-interfaces";
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run = "${pkgs.su}/bin/su -s ${pkgs.stdenv.shell} postgres";
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flags = if cfg.enableTCPIP then ["-i"] else [];
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# The main PostgreSQL configuration file.
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configFile = pkgs.writeText "postgresql.conf"
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''
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hba_file = '${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 = 'syslog'
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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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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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port = mkOption {
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default = "5432";
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description = ''
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Port for PostgreSQL.
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'';
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};
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logDir = mkOption {
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default = "/var/log/postgresql";
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description = ''
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Log directory for PostgreSQL.
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'';
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};
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dataDir = mkOption {
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default = "/var/db/postgresql";
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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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default = ''
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# Generated file; do not edit!
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local all mediawiki ident mediawiki-users
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local all all ident sameuser
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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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description = ''
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Defines how users authenticate themselves to the server.
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'';
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};
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identMap = mkOption {
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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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authMethod = mkOption {
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default = " ident sameuser ";
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description = ''
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How to authorize users.
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Note: ident needs absolute trust to all allowed client hosts.
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'';
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};
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enableTCPIP = mkOption {
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default = false;
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description = ''
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Whether to run PostgreSQL with -i flag to enable TCP/IP connections.
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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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users.extraUsers = singleton
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{ name = "postgres";
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description = "PostgreSQL server user";
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};
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users.extraGroups = singleton
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{ name = "postgres"; };
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environment.systemPackages = [postgresql];
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# !!! This should be be in the mediawiki module, obviously.
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services.postgresql.identMap =
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''
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mediawiki-users root mediawiki
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mediawiki-users wwwrun mediawiki
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'';
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jobs.postgresql =
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{ description = "PostgreSQL server";
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startOn = "started ${startDependency}";
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environment =
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{ TZ = config.time.timeZone;
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PGDATA = cfg.dataDir;
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};
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preStart =
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''
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# Initialise the database.
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if ! test -e ${cfg.dataDir}; then
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mkdir -m 0700 -p ${cfg.dataDir}
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chown -R postgres ${cfg.dataDir}
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${run} -c '${postgresql}/bin/initdb -U root'
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rm -f ${cfg.dataDir}/*.conf
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fi
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ln -sfn ${configFile} ${cfg.dataDir}/postgresql.conf
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# We'd like to use the `-w' flag here to wait until the
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# database is up, but it requires a `postgres' user to
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# exist. And we can't call `createuser' before the
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# database is running.
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${run} -c '${postgresql}/bin/pg_ctl start -o "${toString flags}"'
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# So wait until the server is running.
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while ! ${run} -c '${postgresql}/bin/pg_ctl status'; do
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sleep 1
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done
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''; # */
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postStop =
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''
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${run} -c '${postgresql}/bin/pg_ctl stop -m fast'
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'';
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};
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};
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}
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