AWS S3 - Access Point

-

 

Amazon S3 access points simplify data access for any AWS service or customer application that stores data in S3. Access points are named network endpoints that are attached to buckets that you can use to perform S3 object operations, such as GetObject and PutObject. Each access point has distinct permissions and network controls that S3 applies for any request that is made through that access point. Each access point enforces a customized access point policy that works in conjunction with the bucket policy that is attached to the underlying bucket. 


This is what we are trying to implement.

The user will have an inline policy to perform GET/PUT object operation on the ACCESS POINT.



To create an access point.



I am creating the access point origin as "VPC", which means it's accessible only from VPC. So, for testing, I will be performing all actions from the EC2 instance.

Next, updated the access point policy which allows access only for the user I created "userserver1" and mentioned the actions (GET/PUT) and the resource name which is ACCESS POINT ARN.



The access point ARN is arn:aws:s3:us-east-1:538083825364:accesspoint/demoap-vpc -> But you need to add the keyword "object" to it.

Let's try to upload a file to the bucket via the access point from the EC2 instance.


"Access Denied" which is expected. Now, we need to update the bucket policy.



The bucket policy should allow actions only from the DataAccessPointAccount is matching.


Our upload is working.

Let’s refine access to individual folders. 

I created a folder called “ap” under the same bucket. And I am going to restrict the user only to that bucket.

All I must do is update the access point policy and the IAM role policy.

IAM policy:



Access Point Policy:


Upload worked.  What happens when I upload to the root level? Access Denied.



The access point is a very good option to give access to users or external vendors instead of creating/updating bucket policies.

NOTE: ALLOW in access point will not work if there is an EXPLICIT DENY in bucket policy.

Bucket -> 1: 1 -> Accesspoint.

Comments

Post a Comment

Popular posts from this blog

SRE/DevOps Syllabus

-
Image
  DEVOPS/SRE Principles. Git What is Git? Architecture of Git. Working principle of Git. Create and cloning a repo. Version control branching. Version control commit. Version control managing workflows. Git hooks. Git Reflog. Git Stash. Git Cherry Picking. Undoing changes in different states of Git. Git based terraform template management. AWS CI/CD SDLC Automation. Code Commit. Code Build. Code Deployment. Code Pipeline. Elastic Beankstalk. Code Artifact. CodeGuru. Terraform Terraform Basics. Terraform State. Working with Terraform. Terraform with AWS. Remote State. Terraform Provisioners. Terraform Import, Tainting and Debugging. Terraform Modules. Terraform Functions and Conditional Expressions. Automation using Python - AWS AWS lambda. Automating EC2 with Lambda. Automating S3 with Lambda. Automating VPC with Lambda. Cost optimization with Lambda. SNS,SQS and SES with Python. Managing and Automating AWS Security with Python. Kubernetes - CKAD Application Developer. Kubernetes A...
Read more

AWS Code Commit - CI/CD Series Part 1

-
Image
  This is a multi-part series to show how to implement a CI/CD pipeline in AWS. In this post, We will see how to use AWS Code Commit. AWS CodeCommit is a fully managed source control service that allows you to store and manage your code securely in the cloud.  It provides a private Git repository for your code and supports all Git commands and workflows. CodeCommit also integrates with other AWS services like AWS CodePipeline and AWS CodeBuild, allowing you to automate your entire software release process. This can help you streamline your development workflows and improve the overall efficiency of your team. I created a repo from AWS CodeCommit -> Create Repository. And I begin with cloning the repo locally. So that I can make changes and push it. To clone the repo click on "HTTPS" under Clone URL. I make changes to index.html file. Now push it to AWS CodeCommit. Let’s verify the changes in AWS Code commit. Changes are reflected in AWS CodeCommit. We are done with Part ...
Read more

Docker - Preventing IP overlapping

-
Image
  What is IP address overlapping? When the container IP address overlaps with another IP external, then the application running on the container is not accessible from outside due to the IP address overlapping.  NOTE: This IP address overlapping can happen on the bridge interface IP or docker container IP. Let's see how to address this IP overlapping issue on the bridge interface. I already have a running container.  root@demo:~# docker run -d --name web --network mynet1 nginx:alpine 268647e11011d513d2357ce1c81e0f48787038a83d01d028d31a5b29dbdb885b root@demo:~# docker container ls CONTAINER ID   IMAGE          COMMAND                  CREATED         STATUS         PORTS     NAMES 268647e11011   nginx:alpine   "/docker-entrypoint.…"   4 seconds ago   Up 3 seconds   80/tcp  ...
Read more