Redis バックアップ用シェルスクリプト

backup_redis.sh

#!/bin/sh

#
# Variables
#

MAIL_ADDRESS="ok@example.com"
MAIL_SUBJECT='Redis Backup ends with No Error.'
ALERT_MAIL_ADDRESS="ng@example.com"
ALERT_MAIL_SUBJECT='Redis Backup ends with Some Error!!'

RDB_FILE='/var/redis/6379/dump.rdb'
RDB_INODE_BEFORE=`ls -i ${RDB_FILE} | cut -d ' ' -f1`

#
# Backup Redis Data 
#

REDIS_CLI=`which redis-cli`
if [ $? != 0 ]
then
    echo 'redis-cli does not exist or is not in your PATH!!' | mailx -s ${ALERT_MAIL_SUBJECT} "ng@example.com"
else
    ${REDIS_CLI} bgsave
fi

while true
do
    RDB_INODE_AFTER=`ls -i ${RDB_FILE} | cut -d ' ' -f1`
    if [ ${RDB_INODE_BEFORE} != ${RDB_INODE_AFTER} ]
    then
        RDB_CHECK=`redis-check-dump ${RDB_FILE} | tail -1`
        if [ "${RDB_CHECK}" = "CRC64 checksum is OK" ]
        then
            NUMBER_OF_DATA=`redis-cli dbsize | cut -d ' ' -f2`
            echo "Redis Backup ends with No Error. Number of Data is ${NUMBER_OF_DATA}." | mailx -s ${MAIL_SUBJECT} "ok@example.com"
            # scp などでリモートサーバーにコピー
            break
        else
            echo "Redis Backup ends with Some Error!!" | mailx -s ${ALERT_MAIL_SUBJECT} "ng@example.com"
            break
        fi
    fi
done

exit 0