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bicep/{postgres,mysql}: keep multiple backups, point at latest with symlink

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h7x4
2026-01-29 14:12:14 +09:00
parent bac53be707
commit 1d46fd1ec6
2 changed files with 24 additions and 18 deletions
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22
hosts/bicep/services/mysql/backup.nix
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@@ -44,20 +44,22 @@ in
];
script = let
rotations = 1;
rotations = 2;
in ''
set -eo pipefail
set -euo pipefail
mysqldump --all-databases | zstd --compress -9 --rsyncable -o "/var/lib/mysql-backups/mysql-dump.sql.zst"
OUT_FILE="$STATE_DIRECTORY/mysql-dump-$(date --iso-8601).sql.zst"
mysqldump --all-databases | zstd --compress -9 --rsyncable -o "$OUT_FILE"
rm "$STATE_DIRECTORY/mysql-dump-latest.sql.zst" ||:
ln -s -T "$OUT_FILE" "$STATE_DIRECTORY/mysql-dump-latest.sql.zst"
while [ $(find -type f "$STATE_DIRECTORY" -printf '.' | wc -c) -gt ${toString rotations} ]; do
rm $(find "$STATE_DIRECTORY" -type f -printf '%T+ %p\n' | sort | head -n 1 | cut -d' ' -f2)
done
'';
# NOTE: keep multiple backups and symlink latest one once we have more disk again
# mysqldump --all-databases | zstd --compress -9 --rsyncable -o "${backupDir}/$(date --iso-8601)-dump.sql.zst"
# while [ $(ls -1 "${backupDir}" | wc -l) -gt ${toString rotations} ]; do
# rm $(find "${backupDir}" -type f -printf '%T+ %p\n' | sort | head -n 1 | cut -d' ' -f2)
# done
serviceConfig = {
Type = "oneshot";
User = "mysql";