尝试在 AWS 中作为 lambda 函数运行时代码超时

Question

以下是我的代码，我希望有人可以帮助我清理代码并使其更高效。基本上，代码应该遍历我的 AWS 账户中的所有卷，然后列出所有未标记的卷，然后发送一封电子邮件。但是，在 AWS 中将其作为 lambda 函数运行时会超时，但如果我在本地运行它，则需要 30 多分钟才能完成（但它确实完成了）。我确定它会遍历它不需要的东西。

另外，如果我打印 ec2_instances 列表，我可以看到重复的值，所以我只想拥有唯一的值，这样它就不会为每个 ec2 实例重复脚本。

import logging
import boto3
from smtplib import SMTP, SMTPException
from email.mime.text import MIMEText

logger = logging.getLogger()
logger.setLevel(logging.INFO)

session = boto3.Session(profile_name="prod")
client = session.client('ec2')

untagged_volumes = []
detached_volumes = []
ec2_instances = []

response = client.describe_volumes()

for volume in response['Volumes']:
    if 'Tags' in str(volume):
        continue
    else:
        if 'available' in str(volume):
            detached_volumes.append(volume['VolumeId'])
        else:
            untagged_volumes.append(volume['VolumeId'])
            untagged_volumes.append(volume['Attachments'][0]['InstanceId'])
            ec2_instances.append(volume['Attachments'][0]['InstanceId'])

unique_instances = list(set(ec2_instances))

# Create the msg body.
msg_body_list = []
for instance in unique_instances:
    desc_instance = client.describe_instances()

    # append to the msg_body_list the lines that we would like to show on the email
    msg_body_list.append("VolumeID: {}".format(desc_instance['Reservations'][0]['Instances'][0]['BlockDeviceMappings'][0]['Ebs']['VolumeId']))
    msg_body_list.append("Attached Instance: {}".format(desc_instance['Reservations'][0]['Instances'][0]['InstanceId']))

    # if there are tags, we will append it as singles lines as far we have tags
    if 'Tags' in desc_instance['Reservations'][0]['Instances'][0]:
        msg_body_list.append("Tags:")
        for tag in desc_instance['Reservations'][0]['Instances'][0]['Tags']:
            msg_body_list.append("    Key: {} | Value: {}".format(tag['Key'], tag['Value']))
    # in case we don't have tags, just append no tags.
    else:
        msg_body_list.append("Tags: no tags")
        msg_body_list.append("--------------------")

# send email
mail_from = "xxx@xxx.com"
mail_to = 'xxx@xxx.com'

msg = MIMEText("\n".join(msg_body_list))
msg["Subject"] = "EBS Tagged Instance Report for"
msg["From"] = mail_from
msg["To"] = mail_to

try:
    server = SMTP('xxx.xxx.xxx.xxx', 'xx')
    server.sendmail(mail_from, mail_to.split(','), msg.as_string())
    server.quit()
    print('Email sent')
except SMTPException:
    print('ERROR! Unable to send mail')

Answer 1

Lambda 函数的时间限制为 15 分钟。这就是超时的原因 - 如果您需要更长时间地运行脚本，请查看 AWS Fargate。