Compute Flashcards
What does Lightsail provide?
Quick and easy to setup of instances, containers, storage, and managed databases
Lightsail is best for?
small websites, blogs, low usage workloads
EKS integrates with …?
ECR for containers images
Elastic Load Balancing for load distribution
IAM for authentication
vpc for isolation
How EKS provides high availability and scalability
Master nodes are regionally resilient( put accross multiple AZs
Worker nodes can be spread across multiple was account and vpcs
uses ELB to distribute traffic, Auto scaling to adjust number of nodes
EKS Deployment Options
Standard - managed by aws, workers on ec2 or fargate
EKS on AWS Outposts - on-premises and cloud ( on aws compute)
EKS Anywhere - eks on any hardware in you data center
EKS Monitoring
eks control plane provides logs to amazon cloudWatch logs, api calls recorded in CLoudTrail as events
ECS is global service?
False, is regional
What is required to start using ECS?
Need to create ECS cluster with VPC
What ECS provides?
container management service to run, stop and manage containers on a cluster
Is ECS self-managed?
Yes in cluster mode, serverless with Fargate
Where are docker volumes stored?
local instance store volume, EBS volume, or EFS volume,Fsx lustre
ESC modes
ec2 - cheaper, best for constant, big workloads, net to maintain
fargate - pay as you go, best for small,burst, batch workloads
ESC service definition
how many copies, HA, restarts etc
ECS task definition
represents an application, what steps are needed for that app
ECS container definition
specify which image to use, how much CPU and memory the container is allocated, and many more options.
ECS integrates with..
ECR - for docker images
ELB for load balancing
CloudWatch for Logs
AWS Batch allows…
to run batch jobs across multiple az in region
AWS Batch is a regional service
true
Elastic Beanstalk is X aaService
Platform as a service, like Cloud Foundry
What provides Beanstalk?
automatically handles the details of capacity provisioning, load balancing, scaling, and application health monitoring
What is fargate?
Serverless container engine, works with EKS and ECS
Is Fargate public or private service?
It is private, elastic network interface with private IP is assigned. Public IP can be assigned or NAT gateway attached
Is Lambda public service?
Yes, by default
Limits for Lambada
execution max 15 minutes, size 512mb - 10GB
How Lambda scales?
scales autmatically when code is executed
How Lambda preserve state?
Lambda is stateless service
lambda synchronous invocation - (services)
API Gateway, Cognito, DAta firehose, cloudfront
lambda asynchronous invocation - (services)
API Gateway, s3, cloudwatch logs, event bridge, codecommit, cloudformation, Config
Event Source Mapping
lambda reads event from queue or stream and invokes lambda function on that event
Lambda support event source mappings for..
kinesis, dynamodb,sqs,mq,managed streaming for kafka
lambda provisioned concurrency
allocate lambda resources and hold it on standby
how lambda can be used with cloudFront?
you can use lambda function or request to and from CloudFront (and origin)
Lambda SnapStart
speeds up your Java applications by reusing a single initialized snapshot
How to coordinate multiple lambda functions
aws step functions
x-ray for lambda
distributed tracing
How to inject user data to ec2 instance?
using User Data in UI/ or in cloud formation template, defining cloudinit
What is metadata service ip?
169.254.169.254
ec2 launch types
on-demand- short workload,predictable pricing
Reserved (1/3 years) - long workloads, pay upfront, 75% cheaper, region locked,or az locked
spot -90% savings, can be interupted
dedicated host vs dedicated instance
pay for a physical host that is fully dedicated to running your instances vs you are not sharing instance with anyone, but instance might change
ec2 placement groups
Cluster- same rack, low latency, single az
Spread - distributed across AZs, HA,
Partition - set o partitions per AZ, each partition has multiple instances
ENI
Elastic Network Interface - logical networking component, represents network card, bound to AZ
How to get detailed logs and metrics from ec2?
Install cloudWatch Agent
What is a target group
group of resources (ec2) to use with Elastic load balancers
what is a launch template?
specify ami, instance typ, key pair, security group, block device mapping for Auto scaling group
