python - CLI 命令的 boto 解释

Question

以下 Boto 代码会打印出不需要的输出，我想查看的是 EBS 卷的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 命令会打印正确的状态:

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

Answer 1

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 boto.ec2.blockdevicemapping 对象，您可以使用它访问其属性，如下例所示。希望对您有所帮助。

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

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