Cfrgtkky

I m trying to launch an ec2 instance using aws cli but by default root volume is 8Gb only. how can I launch ec2 instance using CLI with say 100GB of root volume?

I m trying this command,

aws ec2 run-instances --image-id ami-xxxxx --count 1 --instance-type t2.micro
--subnet-id xxxxxxx
--key-name my-key
--security-group-ids sg-xxxxxx
--no-associate-public-ip-address
--user-data file://test.sh
--tag-specifications 'ResourceType=instance,Tags=[{Key=Name,Value=test-server}]'

I tried adding below parameters, but its not working.

--block-device-mapping DeviceName=/dev/sda1,Ebs={VolumeSize=100}

--block-device-mapping /dev/sda1=:100:false

--block-device-mappings --> adds secondary ebs volume to the instance.

This is covered in the AWS CLI Documentation here:

https://docs.aws.amazon.com/cli/latest/reference/ec2/run-instances.html

To launch an instance with a modified block device mapping

You can change individual characteristics of existing AMI block device mappings to suit your needs. Perhaps you want to use an existing AMI, but you want a larger root volume than the usual 8 GiB. Or, you would like to use a General Purpose (SSD) volume for an AMI that currently uses a Magnetic volume.

Use the describe-images command with the image ID of the AMI you want to use to find its existing block device mapping. You should see a block device mapping in the output:

{

  "DeviceName": "/dev/sda1",

  "Ebs": {

    "DeleteOnTermination": true,

    "SnapshotId": "snap-1234567890abcdef0",

    "VolumeSize": 8,

    "VolumeType": "standard",

    "Encrypted": false

  }

}

You can modify the above mapping by changing the individual parameters. For example, to launch an instance with a modified block device mapping, add the following parameter to your run-instances command to change the above mapping's volume size and type:

--block-device-mappings file://mapping.json

Where mapping.json contains the following:

[

  {

    "DeviceName": "/dev/sda1",

    "Ebs": {

      "DeleteOnTermination": true,

      "SnapshotId": "snap-1234567890abcdef0",

      "VolumeSize": 100,

      "VolumeType": "gp2"

    }

  }

]

To do this on one command line, the command should be in the format:

aws ec2 run-instances --block-device-mapping DeviceName=/dev/xvda,Ebs={VolumeSize=100} --image-id ami-0a5e707736615003c --region eu-west-1 --instance-type t3.micro

Note that the device name needs to match the root device name, which you can find with a command in the format:

aws ec2 describe-images --image-id ami-0a5e707736615003c --region eu-west-1