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Fix unintended deletions of old dumps

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Previously, if `mysql` or `mysqldump` failed and you were using the `MAX_BACKUPS`-option, all old dumps were deleted. Now only dumps of successfully detected databases are considered for deletion.
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dlencer 2021-10-21 12:37:55 +02:00 committed by GitHub
parent 4ee035f7d1
commit aa4ddc21d9
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1 changed files with 10 additions and 15 deletions
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19
backup.sh
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@ -6,7 +6,6 @@
DATE=$(date +%Y%m%d%H%M)
echo "=> Backup started at $(date "+%Y-%m-%d %H:%M:%S")"
DATABASES=${MYSQL_DATABASE:-${MYSQL_DB:-$(mysql -h "$MYSQL_HOST" -P "$MYSQL_PORT" -u "$MYSQL_USER" -p"$MYSQL_PASS" -e "SHOW DATABASES;" | tr -d "| " | grep -v Database)}}
DB_COUNTER=0
for db in ${DATABASES}
do
if [[ "$db" != "information_schema" ]] && [[ "$db" != "performance_schema" ]] && [[ "$db" != "mysql" ]] && [[ "$db" != _* ]]
@ -20,23 +19,19 @@ do
echo "==> Creating symlink to latest backup: $(basename "$FILENAME".gz)"
rm "$LATEST" 2> /dev/null
cd /backup || exit && ln -s "$(basename "$FILENAME".gz)" "$(basename "$LATEST")"
DB_COUNTER=$(( DB_COUNTER + 1 ))
else
rm -rf "$FILENAME"
fi
fi
done
if [ -n "$MAX_BACKUPS" ]
then
MAX_FILES=$(( MAX_BACKUPS * DB_COUNTER ))
while [ "$(find /backup -maxdepth 1 -name "*.sql.gz" -type f | wc -l)" -gt "$MAX_FILES" ]
while [ "$(find /backup -maxdepth 1 -name "*.$db.sql.gz" -type f | wc -l)" -gt "$MAX_BACKUPS" ]
do
TARGET=$(find /backup -maxdepth 1 -name "*.sql.gz" -type f | sort | head -n 1)
TARGET=$(find /backup -maxdepth 1 -name "*.$db.sql.gz" -type f | sort | head -n 1)
echo "==> Max number of backups ($MAX_BACKUPS) reached. Deleting ${TARGET} ..."
rm -rf "${TARGET}"
echo "==> Backup ${TARGET} deleted"
done
fi
else
rm -rf "$FILENAME"
fi
fi
done
echo "=> Backup process finished at $(date "+%Y-%m-%d %H:%M:%S")"