I have 7 Spring microservices which I would like to deploy into AWS Elastic Beanstalk. I see that I will be charged by outbound and inbound network traffic. It's not clear to me will I be charged for the internal communication between the microservices?
will I be charged for the internal communication between the microservices?
Depends. If all services are in same AZ and you use private IP addresses, they you will not be charged for traffic. From docs:
Data transferred between Amazon EC2, Amazon RDS, Amazon Redshift, Amazon ElastiCache instances, and Elastic Network Interfaces in the same Availability Zone is free.
But if you spread your services across AZs, then you will be probably paying for the traffic:
Data transferred "in" to and "out" from Amazon EC2, Amazon RDS, Amazon Redshift, Amazon DynamoDB Accelerator (DAX), and Amazon ElastiCache instances, Elastic Network Interfaces or VPC Peering connections across Availability Zones in the same AWS Region is charged at $0.01/GB in each direction.
Cross-region traffic will also have cost.
Related
Google failed me again or may be I wasnt too clear in my question.
Is there an easy way or rather how do we determine what services are VPC bound and what services are non-vpc ?
For example - EC2, RDS require a VPC setup
Lambda, S3 are publicly available services and doesn't need a VPC setup.
The basic services that require an Amazon VPC are all related to Amazon EC2 instances, such as:
Amazon RDS
Amazon EMR
Amazon Redshift
Amazon Elasticsearch
AWS Elastic Beanstalk
etc
These resources run "on top" of Amazon EC2 and therefore connect to a VPC.
There are also other services that use a VPC, but you would only use them if you are using some of the above services, such as:
Elastic Load Balancer
NAT Gateway
So, if you wish to run "completely non-vpc", then avoid services that are "deployed". It means you would use AWS Lambda for compute, probably DynamoDB for database, Amazon S3 for object storage, etc. This is otherwise referred to as going "serverless".
In AWS, an EC2 instance is launched within a subnet created in an Availability Zone which is again, in a VPC. So, the VPC can be thought of like a container to which only the AWS account and its users have access to. But when creating EBS volumes, only the Availability Zone is asked for / provided and the same EBS volume can be attached to any EC2 instance irrespective of the VPC it belongs to (Of course, for the same AWS account only). My question is - How does AWS prevent other AWS accounts from seeing this EBS volume present in the AZ? Is that implementation abstracted by AWS?
An Amazon VPC is a virtual construct that is used to connect virtual computers according to traditional networking. Resources (eg EC2 instances, RDS databases) can be connected via a VPC, which determines how network traffic flows between them. It is not necessarily how the resources are physically created.
An Availability Zone is a physical data center (or a group of data centers). Resources are created in an AZ, which determines their physical location. For example, an Amazon EBS volume resides in a data center, so it is in only one AZ. It can be logically connected to any EC2 instance in the same account in the same AZ.
Amazon EBS volumes are connected via a backplane that is invisible to the resources. It just magically "attaches" to the instance. It does not use the same network as a VPC.
The Amazon EBS service will only provide EBS volumes to EC2 instances in the same AWS account.
According to AWS Shared Responsibility Model:
AWS responsibility “Security of the Cloud” - AWS is responsible for
protecting the infrastructure that runs all of the services offered in
the AWS Cloud. This infrastructure is composed of the hardware,
software, networking, and facilities that run AWS Cloud services.
AWS provides isolation of all resources between accounts, and this implementation is abstracted, and a part of AWS responsibility.
In addition, it is recommended to Encrypt EBS Volumes, it is free and doesn't impact volume performance.
I have a Multi-AZ ECS cluster with EC2 instances and an Aurora RDS cluster with cross-az read replicas. I use the cluster URL for selecting data in RDS.
Does the cluster automatically forward my request to the RDS in the same AZ, if it is possible? If not, how can I prevent unnecessary data transfer between availability zones? (I want to use RDS in different AZ, if and only if the RDS in the same AZ is out of service)
According to AWS documentation:
"Data transferred between Amazon RDS and Amazon EC2 Instances in the same Availability Zone is free."
"Amazon RDS DB Instances inside VPC: For data transferred between an Amazon EC2 instance and Amazon RDS DB Instance in different Availability Zones of the same Region, Amazon EC2 Regional Data Transfer charges apply on both sides of transfer."
To design a system I need to decide on where to deploy the instances (suppose that I don't really care where they are but only want to optimize costs).
The on-demand page mentions several billing items:
Data Transfer IN To Amazon EC2 From Internet
Data Transfer OUT From Amazon EC2 To Internet
Data Transfer OUT From Amazon EC2 To (a list of regions)
Data Transfer Across AZ within this Region
My questions:
About item 1 - they say this is free, is it? does it make sense that from Internet to Amazon is free while from Amazon to Amazon is not free? (I'm talking on the inbound data here, not the outbound).
In items 2-3: does "Amazon" refer to all AWS services, including another EC2 instance?
Regarding item 4: it is written "Data transferred "in" to and "out" of Amazon EC2, Amazon RDS, Amazon Redshift , Amazon DynamoDB Accelerator (DAX), and Amazon ElastiCache instances or Elastic Network Interfaces across VPC peering connections in the same AWS region is charged at $0.01/GB." Is that meaning that if I run a process between 2 EC2 instances on the same region then I pay for each GB twice? first for outbound from one instance and second for the inbound on the other instance.
The simple rules-of-thumb are:
Inbound traffic from the Internet to the AWS Cloud is free.
Outbound traffic from the AWS Cloud to the Internet is charged at the applicable rates in each region (this is the majority of the cost). This applies to anything that sends traffic out to the Internet from your AWS services.
Outbound traffic from the AWS Cloud to Amazon CloudFront has a lesser rate
Traffic within a region but between Availability Zones is 1c/GB in each direction. In fact, the wording on the EC2 Instance Pricing page now shows this.
To answer your specific questions:
Inbound is free
Outbound is for any AWS service that sends traffic to the Internet
Traffic between AZs or via VPC Peering is charged in "each direction"
Is it save to transfer unsecured http messages between two ec2 instances within the same vpc in aws?
Or is it necessary to use ssh tunneling etc?
It's safe in the sense that only your instances exist in the VPC. So the traffic between your two instances in your VPC cannot be sniffed by a 3rd party.
Amazon Virtual Private Cloud (Amazon VPC) lets you provision a
logically isolated section of the Amazon Web Services (AWS) Cloud
where you can launch AWS resources in a virtual network that you
define. You have complete control over your virtual networking
environment, including selection of your own IP address range,
creation of subnets, and configuration of route tables and network
gateways.
Source: Amazon VPC