Event Processing Lambda, SNS and SQS SQS + Lambda If there is a problem during the poll of Lamda function (there may occur like multiple polls and retries). We can create a DLQ (dead-letter qu...

CI/CD CloudFormation Infrastructure as Code, Terraform type-thing CloudFormation is a declarative way of outlining your AWS Infrastructure, for any resources. It will create those resource...

Disaster Recovery Overview ANy event that has a negative impact on a company’s business continuity or finances is a disaster Disaster Recovery (DR) is about preparing for and recovering from ...

KMS, Encryption SDK, SSM Parameter Store Why encryption? Encryption in flight (SSL) Data is encrypted before sending and decrypted after receiving SSL certificates help with e...

CloudWatch, CloudTrail, and Config AWS CloudWatch AWS CloudWatch is a monitoring service to monitor your AWS resources, as well as the applications that you run on AWS. Metrics like CPU, netw...

What is serverless? serverless was pioneered by AWS Lambda but now also includes the idea that “no self-managed databases, messaging, storage, etc..” AWS Lambda Why do we use AWS Lambda? with A...

AWS CLI EC2 Instance Metadata It allows AWS EC2 instances to “learn about themselves” without using an IAM Role for that purpose curl http://169.254.169.254/latest/meta-data/ you can retrieve ...

2 types/patterns of application communication synchronous communications asynchronous / event-based (job queue) Synchronous between applications could be problematic if there are sudden spi...

Scalability When it comes to scalability, it divides into two parts: Horizontal Scalability -> elasticity, we also call this scale up and scale down Vertical Scalability -> we also cal...

Virtual Private Cloud (VPC) ★★★ Amazon Virtual Private Cloud Documentation VPC lets us provision a logically isolated section of our infrastructure where we can launch AWS resources in a vi...