亚马逊RDS - 仅在需要时在线？

Question

我有一个关于Amazon RDS的问题.我每天只需要在线数据库大约2个小时,但我正在处理大约1gb的大型数据库.

我有两个主要问题:

1. 我可以通过脚本自动使我的RDS数据库在线和离线以节省资金吗？

2. 当我将RDS设置为离线以停止"工作时间"计数器运行并向我收费时,当我将其重新联机时它仍将具有相同的内容(即我的所有数据都将保留在那里,或者它必须是空白数据库？).如果是这样,有没有办法绕过这个而不是备份到S3并每次重新导入它？

Answer 1

如果你想以编程方式执行此操作,

1. 使用http://docs.aws.amazon.com/AmazonRDS/latest/CommandLineReference/CLIReference-cmd-CopyDBSnapshot.html快照RDS实例rds-create-db-snapshot

2. 使用http://docs.aws.amazon.com/AmazonRDS/latest/CommandLineReference/CLIReference-cmd-DeleteDBInstance.html删除正在运行的实例rds-delete-db-instance

3. 使用http://docs.aws.amazon.com/AmazonRDS/latest/CommandLineReference/CLIReference-cmd-RestoreDBInstanceFromDBSnapshot.html从快照还原数据库rds-restore-db-instance-from-db-snapshot

如果您希望手动执行此操作,也可以从AWS Web Console执行所有这些操作.

Answer 2

你可以使用shell脚本启动EC2*实例,所以我猜你也可以使用RDS.(见http://docs.aws.amazon.com/AmazonRDS....html)

但是与EC2*不同,你不能"停止"RDS实例而不"破坏"它.终止数据库时需要创建数据库快照.重新启动数据库时,将使用此数据库快照.

*EC2:弹性计算,租用虚拟服务器或服务器.

Answer 3

这是一个停止/启动/重启RDS实例的脚本

#!/bin/bash

# usage ./startStop.sh lhdevices start

INSTANCE="$1"
ACTION="$2"



# export vars to run RDS CLI
export JAVA_HOME=/usr;
export AWS_RDS_HOME=/home/mysql/RDSCli-1.15.001;
export PATH=$PATH:/home/mysql/RDSCli-1.15.001/bin;
export EC2_REGION=us-east-1;
export AWS_CREDENTIAL_FILE=/home/mysql/RDSCli-1.15.001/keysLightaria.txt;

if [ $# -ne 2 ]
then
echo "Usage: $0 {MySQL-Instance Name} {Action either start, stop or reboot}"
echo ""
exit 1
fi


shopt -s nocasematch

if [[ $ACTION == 'start' ]]
then
echo "This will $ACTION a MySQL Instance"  
rds-restore-db-instance-from-db-snapshot lhdevices 
--db-snapshot-identifier        dbStart --availability-zone us-east-1a     
--db-instance-class db.m1.small 

echo "Sleeping while instance is created"
sleep 10m
echo "waking..."

rds-modify-db-instance lhdevices --db-security-groups kfarrell

echo "Sleeping while instance is modified for security group name"
sleep 5m
echo "waking..."

elif [[ $ACTION == 'stop' ]]
then
echo "This will $ACTION a MySQL Instance" 

yes | rds-delete-db-snapshot dbStart

echo "Sleeping while deleting old snapshot "
sleep 10m

#rds-create-db-snapshot lhdevices --db-snapshot-identifier dbStart

# echo "Sleeping while creating new snapshot "
# sleep 10m
# echo "waking...."

#rds-delete-db-instance lhdevices --force --skip-final-snapshot 
rds-delete-db-instance lhdevices --force --final-db-snapshot-identifier dbStart

echo "Sleeping while instance is deleted"
sleep 10m
echo "waking...."

elif [[ $ACTION == 'reboot' ]]
then
echo "This will $ACTION a MySQL Instance" 
rds-reboot-db-instance lhdevices ;

echo "Sleeping while Instance is rebooted"
sleep 5m
echo "waking...."

else

echo "Did not recognize command: $ACTION"
echo "Usage: $0 {MySQL-Instance Name} {Action either start, stop or reboot}"

fi
shopt -u nocasematch

Answer 4

亚马逊最近更新了他们的CLI,以包括启动和停止RDS实例的方法. stop-db-instance和start-db-instance详细说明了执行这些操作所需的步骤.