在Boto3 python脚本中添加AWS标记

Question

Python noob在这里。我最近遇到了一个博客网站，讲授如何使用lambda和python自动化EBS快照。脚本运行完美，技术上做了我想要的一切，除了我无法弄清楚如何在boto3 lib中添加AWS标签。

import boto3
import datetime
import pytz
import os

ec2 = boto3.resource('ec2')

def lambda_handler(event, context):
    print("\n\nAWS snapshot backups starting at %s" % datetime.datetime.now())
    instances = ec2.instances.filter(
        Filters=[{'Name': 'instance-state-name', 'Values': ['running']}])

    for instance in instances:
        instance_name = filter(lambda tag: tag['Key'] == 'Name', instance.tags)[0]['Value']

        for volume in ec2.volumes.filter(Filters=[{'Name': 'attachment.instance-id', 'Values': [instance.id]}]):
            description = 'scheduled-%s-%s' % (instance_name,
                datetime.datetime.now().strftime("%Y-%m-%d-%H:%M"))

            if volume.create_snapshot(VolumeId=volume.volume_id, Description=description):
                print("Snapshot created with description [%s]" % description)

        for snapshot in volume.snapshots.all():
            retention_days = int(os.environ['retention_days'])
            if snapshot.description.startswith('scheduled-') and ( datetime.datetime.now().replace(tzinfo=None) - snapshot.start_time.replace(tzinfo=None) ) > datetime.timedelta(days=retention_days):
                print("\t\tDeleting snapshot [%s - %s]" % ( snapshot.snapshot_id, snapshot.description ))
                snapshot.delete()

    print("\n\nAWS snapshot backups completed at %s" % datetime.datetime.now())
    return True

请有人解释我如何为此脚本创建的ebs快照添加标签。

我的教育猜测是它应该在脚本的这一部分。因为那是创建描述的地方。理论上我可以添加一个名为tag = ec2.Tag的变量（'resource_id'，'key'，'value'）？

    for volume in ec2.volumes.filter(Filters=[{'Name': 'attachment.instance-id', 'Values': [instance.id]}]):
        description = 'scheduled-%s-%s' % (instance_name,
            datetime.datetime.now().strftime("%Y-%m-%d-%H:%M")) 

Answer 1

你在做volume.create_snapshot时添加标签

更换

if volume.create_snapshot(VolumeId=volume.volume_id, Description=description):
    print("Snapshot created with description [%s]" % description)

同

if volume.create_snapshot(
    VolumeId=volume.volume_id,
    Description=description,
    TagSpecifications=[
        {
            'ResourceType': 'snapshot',
            'Tags': [
                {
                    'Key': 'Owner',
                    'Value': 'RaGe'
                },
                {
                    'Key': 'date', 
                    'Value': datetime.datetime.now().strftime("%Y-%m-%d")
                }
            ]
        },
    ]
):
    print("Snapshot created with description [%s]" % description)

reference

这导致：