# Launch EC2 Instance using AWS  CLI

### TASK Description -

1. Create a key pair.

2. Create a security group.

3. Launch an instance using the above-created key pair and security group.

4. Create an EBS volume of 1 GB.

5. The final step is to attach the above-created EBS volume to the instance you created in the previous steps.

### What is AWS CLI?

The **AWS Command Line** Interface (**CLI**) is a unified tool to manage your **AWS** services. With just one tool to download and configure, you can control multiple **AWS** services from the **command line** and automate them through scripts. (Source: aws.amazon.com)
> ***Install AWS CLI***

So, first, we need to install AWS CLI on our OS from where we’re going to run commands.

Go to the below link and Download AWS CLI according to your OS.

[Install AWS CLI](https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-install.html)

After downloading the AWS CLI, Install it.

Now, open a fresh command prompt or Terminal and run the below command.

```
aws --version
```


If the above command runs successfully, then your AWS CLI is installed successfully.
> ***Configure AWS IAM Account with CLI***

So, for using AWS services in CLI first we’ve to login (configure) inside AWS CLI. and for that, we need to have an IAM account in AWS Account.

```
aws configure
```

Run the above command to configure AWS CLI.

This command will ask you for ```Access key ID```, ```Secret Access Key```, ```Region name```, and ```output format``` (by default — JSON).** provide these details and your CLI setup will be completed.

### ***So, Lets Get Started***

> ***Create Key Pair***

First, we’ve to create **key** for Instance to login in to it.

A ```key pair```, consisting of a ```private key``` and ```public key```, is a pair of security credentials.

```aws ec2 create-key-pair --key-name <key_name>``` 

```
aws ec2 create-key-pair --key-name task3
```

![copy selected area.](https://cdn.hashnode.com/res/hashnode/image/upload/v1629651600828/69n9zrSVo.png)
*copy selected area.*

Copy the selected area of output in a file and save it in a file with the same name you have given to key. And the extension of file should be ```.pem``` or ```.ppk’```

For example - ```key_name.pem``` or ```key_name.ppk```.

![Key created successfully](https://cdn.hashnode.com/res/hashnode/image/upload/v1629651603169/YaaYPbu6ya.png)*Key created successfully*

> ***Create Security Group***

Now, let's create ```Security Group``` for Instance. and add **Ingress rule** for SSH on port no. 22, to login into the instance.


```aws ec2 create-security-group --group-name <security_group_name> --description <"Description_for_Security_group">``` 

```
aws ec2 authorize-security-group-ingress --group-id <security_group_id>  --protocol tcp  --port 22  --cidr 0.0.0.0/0
```

![creating security group and adding ingress rule to allow SSH protocol](https://cdn.hashnode.com/res/hashnode/image/upload/v1629651605178/W87IAhJTZ.png)

*creating a security group and adding ingress rule to allow SSH protocol*

![Security Group created successfully](https://cdn.hashnode.com/res/hashnode/image/upload/v1629651607115/UCzExGAlR.png)

*Security Group created successfully*

> ***Launch EC2 Instance***

Now, our key and security group is created successfully, let’s use them and launch an instance on AWS.

```aws ec2 run-instance --image-id <image_id(ami)> --instance-type <instance_type> --key-name <key_name> --security-group-ids <security_group_id>  --count <count>``` 

```
aws ec2 run-instances --image-id ami-068d43a544160b7ef    --instance-type t2.micro --key-name task3 --security-group-ids sg-0f01853a82ba02d2e   --count 1
```

![Launching EC2 instance](https://cdn.hashnode.com/res/hashnode/image/upload/v1629651610128/6TYf6wr9s.png)

*Launching EC2 instance*

![Instance Launched Successfully](https://cdn.hashnode.com/res/hashnode/image/upload/v1629651612287/tkJsGjNZW.png)

*Instance Launched Successfully*

> ***Create EBS volume***

Now we have to create an EBS (Elastic Block Store) volume of size 1GB and attach it to the EC2 instance.

Elastic Block Storage ```EBS``` is easy to use, high-performance block storage service designed to be used with Elastic Compute Cloud ```EC2``` for both throughput and transaction-intensive workloads at any scale.

- Here we have to provide the same availability zone in which your instance is launched otherwise we will be not able to attach the volume with the instance

```
aws ec2 create-volume --availability-zone ap-south-1b --volume-type gp2  --size 1 --tag-specifications ResourceType=volume,Tags=[{Key=Name,Value=EBS_for_task_3}]
```

![creating EBS volume](https://cdn.hashnode.com/res/hashnode/image/upload/v1629651614064/Zjvz6mI3rs.png)

*creating EBS volume*

![EBS volume created successfully](https://cdn.hashnode.com/res/hashnode/image/upload/v1629651615810/m5Xb5sp6H.png)

*EBS volume created successfully…but it is not attached to any instance yet i.e. why it is showing ```state="available"```*

> ***Attach EBS Volume to Instance***

Now we have to attach this volume to the instance which we created above.

```
aws ec2 attach-volume --device /dev/sdb --instance-id i-00af482c76e08e638 --volume-id vol-0ee4e1f77cf2f3849
```

![EBS volume is attached to the instance](https://cdn.hashnode.com/res/hashnode/image/upload/v1629651617564/qv6fW0l5I.png)

*EBS volume is attached to the instance…we can see in “Attachment information”.*

![newly created volume of 1 GB is attached to Instance](https://cdn.hashnode.com/res/hashnode/image/upload/v1629651619498/8mDPC44t2.png)

*Here we can see our newly created volume of 1 GB is attached to Instance*

And thus, all the objectives of the task are successfully completed.

That’s All, Keep Learning.

! THANK YOU For Reading !