'启动更像这样的'AWS EC2实例

Question

I currently have a blog running on AWS EC2 t2.micro .

This t2.micro is getting out-scaled and I need a bigger instance. I'm hosting a Wordpress blog.

Is there a way to change in to t2.medium without affecting the downtime?

I was thinking about the 'Launch more like this' button. Will it launch 2 instances like I have? Where will my site be hosted then?

Answer 1

Easiest solution: Have some downtime.

• Stop the instance
• Change the Instance Type
• Start the instance

Do it when usage is low and it will have minimal impact. Only takes 1-2 minutes.

If a few minutes is too much downtime for you, then you should redesign the system as a Highly-Available application with multiple servers running in different Availability Zones, using a shared, multi-AZ database. If you are just running on one server, there is no guarantee of uptime .

Answer 2

'Launch More Like This' will only help in creating a duplicate server with the same networking characteristics (security groups, volume sizing, etc.). It will not be an identical clone in terms of content unless your configuration is done entirely from the User Data or Cloud Init (which will be the same when you launch using the 'Launch More Like This' button, or if you are using Ansible/Chef or some other system to configure it after the fact. When you launch more like this, you are able to change the instance type if there is a path from your current instance type to the one you want (within any family, such as t2, this is almost always possible). Otherwise, you will have to stop and start the instance to do so.

If you're looking for high availability, you probably want to use an ELB with a Route 53 DNS record that corresponds to your website's URL backed by two instances where requests for the website can be served by either of a pair of instances.

Answer 3

Think about this. When you change the instance type, AWS has to choose a different physical hardware. It may be on the same physical machine or (more likely) another physical machine. For this to happen, the instance has to be stopped before moving it to a new physical machine.

There is no concept of live motion like VMWare in AWS. Your instance has to be stopped before you can change its size.

Launch more like this will create another machine just like the current one. If you have an elastic IP attached, there will be a few seconds of downtime when you re-associate the elastic IP, but the new machine will be a clone of the old machine with a different private IP.

Answer 4

For 'Launch more like this' button: If you use launch more like this button , the storage device will be changed and the data stored on it will be erased. so it will be new instance. you can not see your wordpress blog.

Solution: Just create the AMI Image from your running instance and you should not click no reboot option(why because you may get errors while launching or after launching the new instance from the newly created image). After creating an image and launch with the type t2.medium and run the start the web server inside the instance then repoint your newly created instance ip to your DNS server.

Hopefully you will see your website at "new-instance-public-ip"

Answer 5

您可以创建一个新的EC2，在其上安装博客并使用Route 53附加固定IP，之后您可以将您的域附加到新IP，然后您可以终止微EC2。