import boto3
import csv


outfile="ebs.csv"
csvFile = open(outfile, 'w+', newline='')
fieldnames = ['id', 'name', 'region', 'pvName', "pvcName", 'namespace']
writer = csv.DictWriter(csvFile, fieldnames=fieldnames)
writer.writeheader()

ec2_client = boto3.client('ec2')

regions = ec2_client.describe_regions().get('Regions',[] )

# Iterate over regions
for region in regions:
  print("Looking at region %s " % region['RegionName'])
  reg=region['RegionName']
  ec2 = boto3.client('ec2',region_name=reg)
  volumes = ec2.describe_volumes( Filters=[{'Name': 'status', 'Values': ['available']}])
  for volume in volumes['Volumes']:

    tags = dict(map(lambda x: (x['Key'], x['Value']), volume.get('Tags',[])) )
    pvName = tags.get('kubernetes.io/created-for/pv/name', '')
    pvcName = tags.get('kubernetes.io/created-for/pvc/name', '')
    name = tags.get('Name', '')
    namespace = tags.get('kubernetes.io/created-for/pvc/namespace', '')
    print("Looking at volume %s %s %s %s %s " % (volume['VolumeId'], name, pvName, pvcName, namespace))
    writer.writerow({
      "id": volume['VolumeId'],
      "name": name,
      "region": reg,
      'pvName': pvName,
      'pvcName': pvcName,
      'namespace': namespace,
    })

csvFile.close()