CLI 命令的 boto 解释

Question

以下 Boto 代码向我打印了不需要的输出，我希望看到我的 EBS 卷状态而不是挂载点的状态。

EC2 预留结构：

object {1}
  Reservations [1]
    Instances[1]
      BlockDeviceMappings[2]
        DiviceName
        Ebs{4}
          Status
          DeleteOnTermination
          VolumeId
          AttachTime 

reservations = ec2Conn.get_all_instances(instance_ids=[my_id])
for reservation in reservations:
    for instance in reservation.instances:
        for BlockDeviceMappings in instance.block_device_mapping:
           print(BlockDeviceMappings)

打印我：

/dev/sdf
/dev/sda1

以下 AWS CLI 命令向我显示正确的状态：

aws ec2 describe-instances --instance myinstance-id --query Reservations[*].Instances[*].BlockDeviceMappings[*].{Ebs:Ebs.{s:Status}}

Answer 1

如果您查看 raw 回复，它看起来类似于：

            <blockDeviceMapping>
                <item>
                    <deviceName>/dev/sda1</deviceName>
                    <ebs>
                        <volumeId>vol-xxxxxxxxxx</volumeId>
                        <status>attached</status>
                        <attachTime>2014-04-01T02:23:54.000Z</attachTime>
                        <deleteOnTermination>true</deleteOnTermination>
                    </ebs>
                </item>
                <item>
                    <deviceName>/dev/sdb</deviceName>
                    <ebs>
                        <volumeId>vol-xxxxxxx</volumeId>
                        <status>attached</status>
                        <attachTime>2014-04-01T02:23:54.000Z</attachTime>
                        <deleteOnTermination>false</deleteOnTermination>
                    </ebs>
                </item>
            </blockDeviceMapping>

所以你所要做的就是比你更深一层。

>>> import boto
>>> ec2 = boto.connect_ec2()
>>> [ebs.status for  _, ebs in ec2.get_all_instances(instance_ids=['i-xxxxxx'])[0].instances[0].block_device_mapping.items()]
[u'attached', u'attached']

或使用 Boto3

如果您的目标是获得 "look" 非常接近 aws cli 的 EBS 状态，您可以使用 boto3:

>>> import boto3
>>> boto3.client('ec2')
>>> c.describe_instances(InstanceIds=['i-xxxxxx'])['Reservations'][0]['Instances'][0]['BlockDeviceMappings'][0]['Ebs']['Status']
'attached'

Answer 2

此代码片段将为您提供实例 ID、卷 ID 及其当前状态。通过挂载点，您还可以获得一个 boto.ec2.blockdevicemapping 对象，您可以使用它访问其属性，如下例所示。希望对你有帮助。

from boto.regioninfo import *
from boto.ec2.connection import EC2Connection

# AWS connect info
aws_access_key_id='########## AWS Access Key ############'
aws_secret_access_key='########### AWS Secret Key ############'
region_name='ap-southeast-1'
region_ec2_endpoint='ec2.ap-southeast-1.amazonaws.com'

# Connect EC2
aws_region = RegionInfo(name=region_name, endpoint=region_endpoint)
conn = EC2Connection(aws_access_key_id,aws_secret_access_key,region=aws_region)

reservations = conn.get_all_instances(instance_ids=[my_ids])
for each in reservations:
    for vol in each.instances[0].block_device_mapping.items():
        print str(each.instances[0].id) + " " +  vol[1].volume_id + " "+   vol[1].status

其他一些与此类似的用例https://github.com/dvopsway/aws_scripts/

Answer 3

使用 CLI

response = json.loads(subprocess.check_output(
     ['aws', 'ec2', 'describe-volumes', '--volume-ids', Volume_ID, '--query',
     'Volumes[*].{AZ:AvailabilityZone, size:Size, Device:Attachments[*].{Device:Device}}']))

Volume_AZ = response[0]['AZ']
Volume_Mount_Point = response[0]['Device'][0]['Device']
Volume_size = response[0]['size']

CLI 命令的 boto 解释

boto interpretation of the CLI command

python

boto

amazon-web-services

或使用 Boto3