CODEWITHSUNDEEP
amazon-web-servicesamazon-ec2amazon-vpcelastic-ip
micahhoover
micahhoover

Reputation: 2160

AWS architecture with limited elastic IPs

Right now our small-ish business has 3 clients who we have assigned to 3 elastic IPs in Amazon Web Services (AWS).

If we restart an instance no one loses access because the IPs are the same after restart.

Is there a way to handle expanding to 3 more clients without having things fall apart if there's a restart?

I'm trying to request more IPs, but they suggest it depends on our architecture, and I'm not sure what architecture they're looking for (or why some would warrant more elastic IPs than others or if this is an unchecked suggestion box).

I realize this is a very basic question, but googling around only gets me uninformative docs from the vendors mouth.

EDIT:

There is a lot of content on the interwebs (mostly old) about AWS supporting IPv6, but that functionality appears to be deprecated.

Upvotes: 2

Views: 151

Answers (2)

Won Jun Bae
Won Jun Bae

Reputation: 5389

You can request more EIPs in the short run. Up to 5 EIP is free depending on your account. You should also considering using name based URLs and assign each of your clients to a subdomain, for example,

clientA.example.com
clientB.example.com
clientC.example.com

This way you will not be needing an additional IP for every client you add. Depending on your traffic, one EC2 instance can serve many clients, and as you scale, you can put multiple EC2 instances behind an AWS Elastic Load Balaner, and this will scale to serve exponentially more clients.

If the client wants to keep their servers separate and can pay for them, you can purchase EIP as many as you need. You should also consider separating database into one database instance for each client, which is probably what clients desire more than separation of IPs.

For IPv6, a quick workaround would be to use a front-end ELB that supports both IPv6 and IPv4.

Upvotes: 3

phoenix
phoenix

Reputation: 3169

If you use elastic IPs from VPC, you get 5 per region for an AWS account. See Amazon VPC Limits.

So, you can go to console and select VPC. Then click on elastic IPs, create it. Once created, assign it to a relevant instance. So, atleast for now, you can solve the problem if you are not bothered about region.

Upvotes: 1

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