72 lines
2.3 KiB
Nix
72 lines
2.3 KiB
Nix
{ lib, pkgs, config, TLMS, ... }: {
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services.postgresql = {
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enable = true;
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port = 5432;
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package = pkgs.postgresql_14;
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ensureDatabases = [ "dvbdump" ];
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ensureUsers = [
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{
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name = "grafana";
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}
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{
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name = "dvbdump";
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ensurePermissions = {
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"DATABASE dvbdump" = "ALL PRIVILEGES";
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};
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}
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];
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};
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environment.systemPackages = [ TLMS.packages.x86_64-linux.run-database-migration ];
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systemd.services.postgresql = {
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unitConfig = {
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TimeoutStartSec=3000;
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};
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serviceConfig = {
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TimeoutSec = lib.mkForce 3000;
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};
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postStart = lib.mkAfter ''
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# TODO: make shure grafana can't read tokens...
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$PSQL -c "GRANT CONNECT ON DATABASE dvbdump TO grafana;"
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$PSQL -c "GRANT SELECT ON ALL TABLES IN SCHEMA public TO grafana";
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$PSQL -c "ALTER ROLE dvbdump WITH PASSWORD '$(cat ${config.sops.secrets.postgres_password.path})';"
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$PSQL -c "ALTER ROLE grafana WITH PASSWORD '$(cat ${config.sops.secrets.postgres_password_grafana.path})';"
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export DATABASE_URL=postgres:///dvbdump
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${TLMS.packages.x86_64-linux.run-database-migration}/bin/run-migration
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unset DATABASE_URL
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'';
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};
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systemd.services.dump-csv = {
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path = [ config.services.postgresql.package ];
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serviceConfig = {
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User = "postgres";
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};
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script = ''
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TMPFILE=$(mktemp)
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OUT_FOLDER=/var/lib/pub-files/postgres-dumps/$(date -d"$(date) - 1 day" +"%Y-%m")
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CSV_FILENAME=$(date -d"$(date) - 1 day" +"%Y-%m-%d").csv
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psql -d dvbdump -c "COPY (SELECT id, to_char(time::timestamp at time zone 'UTC', 'YYYY-MM-DD"T"HH24:MI:SS') time, station, telegram_type, delay, reporting_point, junction, direction, request_status, priority, direction_request, line, run_number, destination_number, train_length, vehicle_number, operator, region FROM r09_telegrams WHERE time::date = current_date - 1 ORDER by time ASC) TO '$TMPFILE' DELIMITER ',' HEADER CSV;"
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mkdir -p $OUT_FOLDER
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chmod a+xr $OUT_FOLDER
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cp $TMPFILE $OUT_FOLDER/$CSV_FILENAME
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chmod a+r $OUT_FOLDER/$CSV_FILENAME
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rm -f $TMPFILE
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'';
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};
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systemd.timers.dump-csv = {
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partOf = [ "dump-csv.service" ];
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wantedBy = [ "timers.target" ];
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timerConfig.OnCalendar = "*-*-* 03:11:19";
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};
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}
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