In this blog, we will cover the Q&As from Day 6 of Migrate Apps & Database to Cloud (AWS Workshop) covering Data Migration to AWS FAQs. This blog will help you to get started with Monolithic Applications to AWS with Docker.
In this session, We covered Module 6: Migrating Monolithic Application to AWS with Docker which covers the following objectives.
The course which is available on our Portal looks like below. We encourage trainees to go through the well-done recorded videos before coming to the Live session so that they can come prepared with their doubts & can clear the doubts during the session to make it more Interactive.
[Q/A] Related to Migrating Monolithic Application to AWS with Docker
Q1: What is Docker in AWS?
Ans: An operating system for containers is called Docker. Containers virtualize the operating system of a server in a manner similar to how a virtual machine virtualizes (eliminates the need to manage directly) server hardware. Each server has Docker installed, which offers straightforward instructions for building, starting, and stopping containers.
Q2: What is the main purpose of Docker?
Ans: An open platform for creating, distributing, and running programs is Docker. You may divide your apps from your infrastructure with the help of Docker, allowing for rapid software delivery. You can manage your infrastructure using Docker in the same manner that you manage your applications.
Q3: What are the three main components of Docker?
Ans: There are three parts to the Docker Engine: Server: The Docker daemon is in charge of creating and managing containers.
Rest API: The Rest API allows applications and Docker to communicate and provides Dockerd with instructions. Command Line Interface (CLI): Docker commands are executed using the CLI.
Q4: What is the difference between EC2 and Docker?
Ans: The largest difference for EC2 is that it deploys isolated VM instances with auto-scaling support, and ECS deploys scalable clusters of managed Docker containers. Enterprises can use ECS to scale web applications, perform batch processing, and run services in a hybrid environment to deliver better services to users.
Q5: What are Docker Objects?
Ans: It uses a private container registry to share container images within the enterprise and also uses a public container registry to share container images within the whole world. Metadata is also used by docket images to describe the container’s abilities.
Q6: What are the two major Docker components?
Ans: Docker works via a Docker engine that is composed of two key elements: a server and a client; and the communication between the two is via REST API. The client receives the instructions from the server.
Q7: What is a Docker image vs a container?
Ans: The key difference between a Docker image Vs a container is that a Docker image is a read-only immutable template that defines how a container will be realized. A Docker container is a runtime instance of a Docker image that gets created when the $ docker run command is implemented.
Q8: What is the Docker container used for?
Ans: Docker is an open platform for developing, shipping, and running applications. You may decouple your apps from your infrastructure using Docker, which helps you swiftly deliver software. You may use Docker to manage your infrastructure in the same manner that you do your applications.
Q9: What is the difference between a virtual machine and a docker?
Ans:
Q 10: What are Container Orchestration and its tool?
Ans: Container orchestration is the automation of much of the operational effort required to run containerized workloads and services. This includes a wide range of things software teams need to manage a container’s lifecycle, including provisioning, deployment, scaling (up and down), networking, load balancing, and more.
Q11: What is Amazon Elastic container registry ECR?
Ans: Amazon Elastic Container Registry (Amazon ECR) is an AWS-managed container image registry service that is secure, scalable, and reliable. With the aid of AWS IAM, Amazon ECR allows private repositories with resource-based permissions.
Q12: What are the benefits of Auto Scaling with Container Orchestration?
Ans: For scale-in events, Amazon Elastic Container Service (Amazon ECS) has enhanced Amazon ECS Capacity Providers to provide a quicker Cluster Auto Scaling experience. Now that Amazon ECS scales in extra capacity more quickly, you can increase infrastructure utilization and reduce compute expenses.
You can deploy, manage, and scale containerized applications more easily with the help of Amazon ECS, a fully managed container orchestration service. In order to free you from worrying about managing infrastructure, cluster autoscaling (CAS), an Amazon ECS feature, maintains the Amazon EC2 instances in an Auto Scaling group (ASG) on your behalf.
Q13: What are microservices and monolithic?
Ans: A monolithic application is built as a single unified unit while a microservices architecture is a collection of smaller, independently deployable services. Which one is right for you? It depends on multiple factors.
Q14: Can I keep a legacy monolithic database for multiple microservices?
Ans: Keeping a shared monolithic database for multiple microservices creates tight coupling, which means you can’t independently deploy changes to your microservices, and that all schema changes must be coordinated among your microservices. Although you can utilize a relational data store as your monolithic database, certain of your microservices may benefit more from using a NoSQL database.
Q15: Do I have to use a separate database for each microservice?
Ans: In a microservices design, loose coupling is a major benefit. Persistent data for each microservice must be kept private and only accessible through the API for that microservice. If your microservices use the same database, changes to the data schema must be carefully considered.
Related Links/References:
- 5 Steps for a Cost-efficient Migration to AWS Cloud
- Top 10 Must-Have AWS Cloud Migration Tools in 2022
- AWS Database Migration Service: Everything You Need To Know
- Application Migration to AWS & Its 6 Phases
- AWS Server Migration Service
- AWS Database Migration Service
- AWS Training and Certification
- Migrate Apps & Database to Cloud Day 3: Application Migration to AWS
- Migrate Apps & Database to Cloud Day 4: AWS Database Migration
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