About EC2

what is EC2 and how to launch it?

to launch an ec2 server, we need to know these 7 steps before moving onto ec2:

step 1: Choose an Amazon Machine image (AMI)

each ami contains AMI ID which is region specific

step 2: Choose an Instance Type

here we are providing cpu and memory to our instance

step 3: Configure your instance

it means how many no. of instances you want to setup.

you can launch multiple instances from same AMI.

in this step, we will configure on which network, in which data centre of region, we are going to create server.

step 4: Add Storage

to store the data in server we use ebs volumes.

ebs stands for elastic block storage. for single instance, we can attach multiple ebs volumes. ebs is one of the aws service which will provide the storage for your server.

step 5: Add Tags

you can name your instance here

step 6: Configuring Security Groups

security group means set of firewall rules that controls which network traffic is allowed to reach or leave your instance.

step 7: Key pair

An AWS EC2 key pair consists of a public key and a private key used for SSH authentication.

key pair is like a password/key for authentication.

we can connect the server in 2 ways:

with key-pair - for safe and secured way

without key-pair - unsafe

EC2 server checks whether your private key matches the public key stored on the server. then only it will connect to server.