Other Compute Services: ECS, Lambda, Batch, Lightsail

common use case for lambda?

1. Serverless CRON Job CloudWatch Events EventBridge Triggers every 1 hour telling Lambda function to perform a task

advantages of docker

1. any machine no compatibility issues predictable behavior less work easier to maintain/deploy works with any language, OS, or technology scale containers up and down in seconds

use cases for lambda

1. create thumbnails for images uploaded to S3 2. run serverless cron job

Benefits of Lambda

1. easy pricing: pay per request and compute time 2. integrated with AWS suite of services 3. event-driven: functions get invoked by AWs when needed (REACTIVE SERVICE) 4. integrated with many programming languages 5. ez to get more resources per function (up to 3 GBPs per function)

sample workflow for aws batch

1. image added to S3 bucket 2. triggers AWS batch 3. Batch provisions an ECS cluster containing EC2 instances or spot instances 4. These instances run your docker images that perform your job, maybe inserting the image into another S3 bucket

differences between Batch and Lambda?

1. lambda has time limit, limited runtimes, and limited temporary disk space 2. batch has no time limit and allows any runtime as long as its packaged as a docker image. Batch relies on EBS/instance store for disk space 3. Lambda is serverless, but Batch is not

What are examples of serverless storage in AWS?

Amazon S3 DynamoDB Fargate Lambda

where are docker images stored?

Docker Repositories

what does Lambda NOT do?

Docker is NOT for AWS Lambda. It's for ECS/Fargate

where must docker images be stored so they can be run by ECS or Fargate?

ECR

keyword for docker containers in AWS?

ECS

What is Amazon ECR

Elastic Container Registry - private docker registry on AWS for docker images

What is ECS?

Elastic Container Service used to launch docker containers on aws has integrations with application load balancer

does serverless mean there are no servers?

NO - just means that as an end user you don't manage, provision, or see them

Formula for Lambda billing

Time run x RAM provisioned Number of invocations

What is Fargate

Used to launch docker containers on AWS BUT YOU DONT NEED TO PROVISION INFRASTRUCTURE (NO EC2 INSTANCES) Serverless offering - simpler! AWS runs containers for you based on the CPU / RAM you need

How are Batch jobs defined in AWS?

docker images and run on ECS

difference between ecs and fargate?

fargate does not need underlying infrastructure (ec2 instancs)

What is the free tier of lambda?

free tier = 1,000,000 aws lambda requests and 400,000 GBs of compute time

What is AWS Batch?

fully managed batch processing at any scale efficiently run 100,000s of computing batch jobs in aws Will dynamically launch ec2 instances or spot instances and provision right amount of compute/memory You submit or schedule batch jobs and Batch does the rest

Why is lambda so popular?

it is very cheap and easy to run

what is a batch job

job with a start and an end (opposed to continuous)

traditional architecture for EC2 instances

layer1: infrastructure layer2: host OS layer3: hypervisor layer4: Guest OS (VMs/EC2 instances) layer5: apps

AWS architecture for EC2 instances + docker

layer1: infrastructure layer2: host OS (EC2 instance) layer3: docker daemon layer4: many lightweight containers can run on the docker daemon. easily scalable

keyword for lightsail on exam?

little to no cloud experience

What is serverless?

new paradigm where developers don't have to manage servers. They just deploy code / function! initially FaaS (function as a service) Pioneered by Lambda but now includes anything that's managed: databases, messages, storage, etc

aws lambda pricing strategy

pay per calls, first 1,000,000 are free $0.20 per 1 mil requests thereafter pay per duration (in increments of 100ms) 400,000 GB-seconds of compute time per month are free After that, $1.00 for 600,000 GB-seconds

who is Lightsail for?

ppl with little cloud experience who need to get up and running good for dev/test environment in aws

What is Amazon Lightsail?

provides virtual servers, storage, databases and networking low and predictable pricing simpler alternative to ec2, rds, elb, ebs, route53 monitoring and notifications has high availability, but no auto-scaling and limited AWS integrations

Docker Hub

public docker repo containing images for many technologies or OS

Docker vs. VMs

resources are shared with host - many containers on one server

What is docker?

software dev platform to deploy apps apps are packaged in containers that can be run on any OS once in a container an app will run the same, regardless of where run

what does AWS handle with ECS?

starting/stopping containers

What is Lambda?

virtual functions - no servers to manage! Limited by time - recommended for short executions run on-demand scaling is automated

what are you responsible for with ECS?

you must provision / maintain the infrastructrure (EC2 instances) yourself