mirror of
https://github.com/fradelg/docker-mysql-cron-backup.git
synced 2024-11-01 08:31:45 +01:00
42 lines
1.7 KiB
Bash
Executable file
42 lines
1.7 KiB
Bash
Executable file
#!/bin/bash
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[ -z "${MYSQL_USER}" ] && { echo "=> MYSQL_USER cannot be empty" && exit 1; }
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[ -z "${MYSQL_PASS:=$MYSQL_PASSWORD}" ] && { echo "=> MYSQL_PASS cannot be empty" && exit 1; }
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[ -z "${GZIP_LEVEL}" ] && { GZIP_LEVEL=6; }
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DATE=$(date +%Y%m%d%H%M)
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echo "=> Backup started at $(date "+%Y-%m-%d %H:%M:%S")"
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DATABASES=${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)}}
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DB_COUNTER=0
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for db in ${DATABASES}
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do
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if [[ "$db" != "information_schema" ]] && [[ "$db" != "performance_schema" ]] && [[ "$db" != "mysql" ]] && [[ "$db" != _* ]]
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then
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echo "==> Dumping database: $db"
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FILENAME=/backup/$DATE.$db.sql
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LATEST=/backup/latest.$db.sql.gz
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if mysqldump -h "$MYSQL_HOST" -P "$MYSQL_PORT" -u "$MYSQL_USER" -p"$MYSQL_PASS" $db $MYSQLDUMP_OPTS > "$FILENAME"
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then
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gzip "-$GZIP_LEVEL" -f "$FILENAME"
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echo "==> Creating symlink to latest backup: $(basename "$FILENAME".gz)"
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rm "$LATEST" 2> /dev/null
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cd /backup && ln -s $(basename "$FILENAME".gz) $(basename "$LATEST") && cd -
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DB_COUNTER=$(( DB_COUNTER + 1 ))
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else
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rm -rf "$FILENAME"
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fi
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fi
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done
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if [ -n "$MAX_BACKUPS" ]
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then
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MAX_FILES=$(( MAX_BACKUPS * DB_COUNTER ))
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while [ "$(find /backup -maxdepth 1 -name "*.sql.gz" -type f | wc -l)" -gt "$MAX_FILES" ]
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do
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TARGET=$(find /backup -maxdepth 1 -name "*.sql.gz" -type f | sort | head -n 1)
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echo "==> Max number of backups ($MAX_BACKUPS) reached. Deleting ${TARGET} ..."
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rm -rf "${TARGET}"
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echo "==> Backup ${TARGET} deleted"
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done
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fi
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echo "=> Backup process finished at $(date "+%Y-%m-%d %H:%M:%S")"
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