python - 使用 boto3 删除 CloudFront 分配

Question

我正在编写一个拆卸脚本，需要删除网站的云前端发行版。看起来你必须遵循以下内容

1. 禁用分发
2. 等待分配被禁用(部署)
3. 删除分发

但是，看起来服务员在第 2 步失败了，而且除非已禁用分发，否则 delete_distribution 也会失败。

result = client.update_distribution(
    DistributionConfig=disabledConf, 
    Id=dist_id, 
    IfMatch=matchid)
waiter = client.get_waiter('distribution_deployed')
print("Waiting for disabling the distribution")
waiter.wait(Id=dist_id)  # Throws here
client.delete_distribution(Id=dist_id, IfMatch=result['ETag'])

有人知道如何让它与 boto3 一起工作吗？

Answer 1

我刚刚遇到了这个问题。问题在于 Boto3 没有禁用分发的等待功能。来自 docs关于“distribution_deployed”等待函数:

Polls CloudFront.Client.get_distribution() every 60 seconds until a successful state is reached. An error is returned after 25 failed checks.

这意味着它不适用于禁用发行版。为了解决这个问题，我使用 datetime 和 time.sleep 函数来实现我自己的服务员。

import time
from datetime import datetime,timedelta
import sys

#disable distribution
result = client.update_distribution(
    DistributionConfig=disabledConf, 
    Id=dist_id, 
    IfMatch=matchid)

#wait for distribution to disable....
print("Waiting for disabling the distribution...This may take a while....")
timeout_mins=60 
wait_until = datetime.now() + timedelta(minutes=timeout_mins)
notFinished=True
eTag=""
while(notFinished):
    #check for timeout
    if wait_until < datetime.now():
        #timeout
        print("Distribution took too long to disable. Exiting")
        sys.exit(1)

    status=client.get_distribution(Id=dist_id)
    if(status['Distribution']['DistributionConfig']['Enabled']==False and status['Distribution']['Status']=='Deployed'):
        eTag=status['ETag']
        notFinished=False

    print("Not completed yet. Sleeping 60 seconds....")
    time.sleep(60) 

#delete distribution
client.delete_distribution(Id=dist_id, IfMatch=eTag)   

因此除了检查它是否被禁用之外，您还需要查看更改是否已生效。您可以通过确保“状态”已更改为“已部署”(更改期间将处于进行中)来执行此操作