Boto3 get EC2 instance's volume

Question

I am trying to get volume-id list of aws instance using boto 3, I am getting sort of collection manager but I don\'t know how to get the data inside.

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Answer 1

e.g. you can get the volume ID and size simply by iterating over it.

for volume in volumes:
    print (volume.id, volume.size)

Answer 2

You can use cli also. Example I'm trying to get list of root volumes attached

aws ec2 describe-volumes --filters "Name=attachment.device,Values=*sda1" --query "Volumes[*].[VolumeId]"  --output text --profile=my_genius_aws_profile

Answer 3

It's just an iterable of objects so

for v in volumes:
    print(v.id)

if you want to get a list of id :

l = [v.id for v in volumes]

Answer 4

Using an EC2 client:

ec2_client = boto3.client('ec2',
                    aws_access_key_id='XYZ',
                    aws_secret_access_key='XYZ',
                    region_name='us-east-1')
volumes = ec2_client.describe_instance_attribute(InstanceId='i-0b30bea4e05579def',
Attribute='blockDeviceMapping')

Answer 5

An iterator is returned by ec2.Instance.volumesCollection

You can extract the volume ids with code like this

volume_id_list=[]
for item in instance.volumes.all():
  volume_id_list.append(item.id)

then volume_id_list[0] contains the first disk, volume_id_list[1] the second etc

See https://boto3.readthedocs.io/en/latest/reference/services/ec2.html#EC2.Instance.volumes