使用python按標簽名稱列出AWS實例

Question

我有小的python代碼可列出整個區域內的所有EC2實例，但是我在打印結果時找不到如何獲取Tag'Name'的信息。 使用instance.tags可以打印所有標簽，但是我只需要'Name'

代碼示例：

import boto3

access_key = "xyw"
secret_key = "xywz"

client = boto3.client('ec2', aws_access_key_id=access_key, aws_secret_access_key=secret_key,region_name='us-east-1')

ec2_regions = [region['RegionName'] for region in client.describe_regions()['Regions']]

for region in ec2_regions:
  conn = boto3.resource('ec2', aws_access_key_id=access_key, aws_secret_access_key=secret_key,
               region_name=region)
  instances = conn.instances.filter()
  for instance in instances:
    if instance.state["Name"] == "running":
      print (region, instance.key_name, instance.public_dns_name, instance.image_id, instance.instance_type, instance.tags)

Answer 1

您需要遍歷tags因此需要在代碼中添加它

  for tag in tags:
    if tag["Key"] == 'Name':
        instancename = tag["Value"]

像這樣的東西

import boto3

access_key = "xyw"
secret_key = "xywz"

client = boto3.client('ec2', aws_access_key_id=access_key, aws_secret_access_key=secret_key,region_name='us-east-1')

ec2_regions = [region['RegionName'] for region in client.describe_regions()['Regions']]

for region in ec2_regions:
  conn = boto3.resource('ec2', aws_access_key_id=access_key, aws_secret_access_key=secret_key,
               region_name=region)
  instances = conn.instances.filter()
  for instance in instances:
    if instance.state["Name"] == "running":
      instancename = ''
      for tag in instance.tags:
        if tag["Key"] == 'Name':
            instancename = tag["Value"]
      print (region, instance.key_name, instance.public_dns_name, instance.image_id, instance.instance_type, instancename)

Answer 2

我們可以用boto的

get_all_instances

可以將標簽用作過濾器

請參閱： http : //boto.cloudhackers.com/en/latest/ref/ec2.html

 def list_nodes():
     filter_tags = {
        "tag:Environment": "xyz",
        "tag:Project": "abc",
        "tag:Test": "test",
        "instance-state-name": 'running'
    }
    boto_ec2 = EC2Connection(..)
    reservations = boto_ec2.get_all_instances(filters=filter_tags)
    instances = [i for r in reservations for i in r.instances]
    return instances