29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
67 lines
1.5 KiB
Nix
67 lines
1.5 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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inherit (pkgs) postgresql gzip;
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location = config.services.postgresqlBackup.location ;
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postgresqlBackupCron = db:
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''
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${config.services.postgresqlBackup.period} root ${postgresql}/bin/pg_dump ${db} | ${gzip}/bin/gzip -c > ${location}/${db}.gz
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'';
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in
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{
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options = {
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services.postgresqlBackup = {
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enable = mkOption {
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default = false;
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description = ''
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Whether to enable PostgreSQL dumps.
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'';
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};
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period = mkOption {
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default = "15 01 * * *";
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description = ''
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This option defines (in the format used by cron) when the
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databases should be dumped.
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The default is to update at 01:15 (at night) every day.
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'';
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};
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databases = mkOption {
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default = [];
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description = ''
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List of database names to dump.
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'';
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};
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location = mkOption {
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default = "/var/backup/postgresql";
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description = ''
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Location to put the gzipped PostgreSQL database dumps.
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'';
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};
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};
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};
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config = mkIf config.services.postgresqlBackup.enable {
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services.cron.systemCronJobs = map postgresqlBackupCron config.services.postgresqlBackup.databases;
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system.activationScripts.postgresqlBackup = stringAfter [ "stdio" "users" ]
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''
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mkdir -m 0700 -p ${config.services.postgresqlBackup.location}
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chown root ${config.services.postgresqlBackup.location}
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'';
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};
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}
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