ECS (Elastic Container Service)

Question 1

What is Docker?

Answer 1

• A software development platform to deploy apps.
• Apps are in containers.
• Docker deploy the container along severar SOs
• You can deploy and scale you app quickly.

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Question 2

What is Amazon ECR?

Answer 2

• Amazon Elastic Container Register.
• The private repository for Containrer Images.
• Same as Docker but private.
• Here is where your Docker Image is stored.

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Question 3

What is Amazon ECS?

Answer 3

Elastic Container Service
Launch the containers in AWS.
Start/Stop the containers.
It’s integrated with Load Balancers

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Question 4

What is your responsibility at using Amazon ECS?

Answer 4

You must provision & maintain
the infrastructure (the EC2
instances)

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Question 5

What is Fargate?

Answer 5

• Simila to ECS but serveless.
• You don’t need EC2 instances to run you rcontainer.
• It runs the container in somewhere as SaaS.
• it sets the CPU&RAM according you need.

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Question 6

What is ECR?

Answer 6

+ Elastic Container Register
+ It’s the equal of Docker, where the Docker images live in AWS.
+ It’s private.

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Question 7

What is Serveless?

Answer 7

+ A service that is not manage.
+ You don’t have to worry about the server where the serveless service is running
+ Basicaly, consist on deploy code: Function as a Service (FaaS).

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Question 8

What of this services is not Serveless?

a. S3
b. EC2
c. Fargate
d. Dynamo DB
e. Lambda

Answer 8

B This service implies to manage instances of Machines. The remainder are pure managed services, which means that all of them works over a platform (PaaS) to provide a Service (SaaS).

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Question 9

What is AWS Lambda?

Answer 9

A SaaS (Serveless) that:
* Runs functions.
* Short Duration
* Run On-Demand
* it’s sclaing is automed.

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Question 10

What are the main difference beteween EC2 and Lambda?

Answer 10

• EC2 is Virtual Server and Lambda is a Virutal Function
• EC2 is Limited by CPU and Lambda by Time.
• EC2 contantly runs and Lambda runs on-demand
• EC2 needs asistance to add/remove resources and Lambda Scales Autmated.

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Question 11

Does AWS manage Event-Drive?

Answer 11

YES
The Lambda function can be invoked whenever it’s neccesary.

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Question 12

Which AWS Entity monitors AWS Lambda?

Answer 12

AWS CloudWatch

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Question 13

What Image Format prefers ECS or Fargate?

Answer 13

Docker Image.

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Question 14

Where do you can find a Lambda Container Image.

Answer 14

Lambda Runtime API
Lambda Container Image is the format that MUST be used with Lambda Runtime API

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Question 15

What AWS Service do you need to invoke Lambda Fucntions

Answer 15

Amazon API Gateway, which fordwards the request to the Lambda Function.

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Question 16

How can you use Amazon API Gateway from a remote client?
(Talking about protocols or standars)

Answer 16

1. RESTful (HTTP)
2. Websockets

All of them support may ways of security.

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Question 17

What is AWS BATCH?

Answer 17

• Run batch jobs on AWS across managed EC2 instances or Spot Instances
• It’s a managed service.
• BATCH Job can be considered as a Docker and run over a EC2.
• Its main characteristic is that BATCH instances an EC2 instance to do the Job and, afert it’s done, finish the instance.

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Question 18

What are the main difference between BATCH and LAMBDA?

Answer 18

Batch use CPU, has no limit of use because it depends of EC2.

Lambda only runs along the function live, is serveless and it’s a temporary element.

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Question 19

What is Amazon Lightsail?

Answer 19

• Is the service easy-to-use that Amazon provide to help implementing services in few mintues.
• Its target is Any person who has no expertis on IT (with little cloud experience).
• It has a predictable pricing.

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Question 20

Which AWS service allows you to launch Docker containers on AWS, but requires you to provision and maintain the infrastructure?

Answer 20

ECS allows you to launch Docker containers on AWS, but you must provision and maintain the infrastructure

Questionary