53 lines
1.2 KiB
Nix
53 lines
1.2 KiB
Nix
{
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pkgs,
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lib,
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config,
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...
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}:
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let
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createDatatbaseState =
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db:
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let
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folder = "/var/backup/postgresql/${db}";
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curFile = "${folder}/dump.sql.zstd";
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prevFile = "${folder}/dump.sql.prev.zstd";
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inProgressFile = "${folder}/dump.sql.in-progress.zstd";
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in
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{
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folders = [ folder ];
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preBackupCommand = ''
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(
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umask 0077 # ensure backup is only readable by postgres user
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if [ -e ${curFile} ]; then
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mv ${curFile} ${prevFile}
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fi
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pg_dump -C ${db} | \
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${pkgs.zstd}/bin/zstd --rsyncable | \
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> ${inProgressFile}
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mv ${inProgressFile} ${curFile}
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)
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'';
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postRestoreCommand = ''
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if [[ -f ${prevFile} ]]; then
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zstd --decompress --stdout ${prevFile} | psql -d ${db}
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fi
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'';
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};
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in
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{
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options.clan.postgresl = {
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databases = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [ "clan" ];
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};
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};
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config = {
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services.postgresql.enable = true;
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clanCore.state = lib.listToAttrs (
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builtins.map (
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db: lib.nameValuePair "postgresql-${db}" (createDatatbaseState db)
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) config.clan.postgresl.databases
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);
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};
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}
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