#elastic ip

[cloudemind]

AWS Elastic IP vs Public IP

Có bài viết học luyện thi AWS mới nhất tại https://cloudemind.com/aws-elastic-ip-vs-public-ip/ - Cloudemind.com

AWS Elastic IP vs Public IP

Bài này Kevin sẽ cùng so sánh sự khác nhau giữa Elastic IP và Public IP. Elastic IP là một khái niệm mới khi sử dụng AWS (thường thì các dịch vụ AWS có tiền tố là E có nghĩa là Elastic mô tả ý nghĩa sự giãn nở và linh hoạt của dịch vụ).

Điểm giống nhau trước hết Elastic IP và Public IP đều có tính công cộng có nghĩa là gán với EC2 instance bạn có thể truy xuất từ Internet. Nhưng EIP và Public IP có rất nhiều điểm khác nhau và là một Cloud Architect bạn cần hiểu rõ sử dụng.

Definition

Public IP: là địa chỉ IP được gán với EC2 instance được lấy từ Amazon’s pool, không có tính liên kết với tài khoản AWS của bạn.

EIP: cấp phát EIP có tính liên kết với tài khoản AWS của bạn.

Cost

Public: Free

EIP: Free khi sử dụng, sẽ có tính phí nếu bạn không sử dụng, ko liên kết với tài nguyên AWS, hoặc ở trạng thái stopped.

Attached IP per instance

Public: 1

EIP: more than one. but additional EIP will be charged.

Static or Dynamic

Public: Dynamic. Change when stop and start again.

EIP: Static. Keep even when you stop and start the instance again.

Limited per account

Public: Unlimited

EIP: 5

Can recovery

Public: No

EIP: may recover if no one request for it.

Share publicity

Public: not recommended. IP Address can be changed.

EIP: Yes

Public IP sẽ được gán nếu EC2 instance bạn khởi tạo có enable public access, riêng với EIP bạn cần phải request / allocate EIP và gán với EC2 explicitly. Lưu ý bạn có số lượng EIP per Region là 5 khi tạo các workload. Bạn nên cân nhắc sử dụng kết hợp với ELB để có kiến trúc linh hoạt cân bằng tải hơn.

Have fun!

Xem thêm: https://cloudemind.com/aws-elastic-ip-vs-public-ip/

[curiousviral-blog]

How To Assign Elastic IP To Server On Amazon Cloud

How to assign elastic and you can attach and association with elastic IP to ec2 instance in AWS public as well as static IP.

HOW TO ASSIGN ELASTIC IP TO SERVER ON AMAZON CLOUD

[datamount-blog]

What are the Benefits of using Elastic IP Addresses

What are the Benefits of using Elastic IP Addresses

An Elastic IP Address (EIP) is a public IP address resource that you can purchase and use independently. You can associate an EIP with an ECS instance of the VPC network, a private SLB instance of the VPC network, an ENI of the VPC network, and a NAT Gateway, or a HAVIP.

An EIP is also a type of NAT IP address that is located in the public network gateway of Alibaba Cloud, and is mapped to the…

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[bearstoneha]

Static IP addresses for Amazon Web Services instances

Static IP addresses for Amazon Web Services instances

This very blog you are reading right now is running on a t2.micro instance in the Amazon Web Services Cloud.  The T2 micro instances are some of the cheapest options when running a full time server in the AWS cloud.  Normally when running these types of instances, we want to keep the cost down as much as possible.  I’ve recently wrote about my Migration to AWShere, where I talk about how much it…

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[roozbehkblog-blog]

EC2 and Multiple Elastic IP Addresses (cpanel)

If you are planning to run cpanel or any hosting platform software on EC2. you might want to look at Amazon VPC. 

EC2 and elastic IP behavior don't correspond exactly to that of a dedicated server with a static IP address.

In a regular dedicated/virtual server with static IP address, if you do an ifconfig, you'll see the static IP address in there. But in EC2, you won't see the elastic IP.

That's because the elastic IP is never assigned to the instance, as a normal static IP would be. EC2 uses NATing to map elastic IP to the private IP of EC2 instance it's currently bound to.

In EC2(NAT based set up), where the private IP is used on the machine to translate on the network to the public IP, the domain should have the private IP in Apache configuration (/etc/httpd/conf/httpd.conf) file and the public IP in the DNS Zone. 

Also, it is good to note that SSL can only be installed on one site since EC2 only allows one Elastic IP / EC2 Instance.

Good News:

as of July 2012, Instances in a VPC can be assigned one or more private IP addresses, each of which can be associated with its own Elastic IP address. 

[ibroadfo]

PROTIP: Elastic IPs

A potentially non-obvious hitch: when you assign an AWS elastic IP to an instance, the instance's current IP and public DNS hostname disappear into the void.