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这篇文章主要讲解了“boto支持aws4引发的错误怎么解决”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“boto支持aws4引发的错误怎么解决”吧！
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软件版本
root@demo:/home/demouser# ceph -v ceph version 10.2.6 (656b5b63ed7c43bd014bcafd81b001959d5f089f) boto版本:2.46.1
rgw配置
[client.radosgw.cn-zone1] rgw DNS name = ceph.work rgw frontends = fastcgi socket_port=9000 socket_host=127.0.0.1 host = demo keyring = /etc/ceph/ceph.client.radosgw.keyring rgw socket path = /home/ceph/var/run/ceph-client.radosgw.cn-zone1.sock log file = /home/ceph/log/radosgw.cn-zone1.log rgw print continue = false rgw content length compat = true
boto用例
from boto.s3.connection import S3Connection import boto import os os.environ['S3_USE_SIGV4'] = 'True' #启动对aws4的支持 endpoint = 'ceph.work' bucket_name = 'test1' access_key = '' secret_key = '' conn = boto.connect_s3( aws_access_key_id=access_key, aws_secret_access_key=secret_key, host=endpoint, is_secure=False, calling_format=boto.s3.connection.SubdomainCallingFormat(), validate_certs=True, ) bucket = conn.get_all_buckets() print bucket
异常信息
Traceback (most recent call last): ..... File "/Users/demouser/lwc/lib/python2.7/site-packages/boto/auth.py", line 690, in determine_region_name return region_name UnboundLocalError: local variable 'region_name' referenced before assignment
boto对region_name的逻辑处理
def split_host_parts(self, host):
return host.split('.')
def determine_region_name(self, host):
# S3's different format(s) of representing region/service from the
# rest of AWS makes this hurt too.
#
# Possible domain formats:
# - s3.amazonaws.com (Classic)
# - s3-us-west-2.amazonaws.com (Specific region)
# - bukkit.s3.amazonaws.com (Vhosted Classic)
# - bukkit.s3-ap-northeast-1.amazonaws.com (Vhosted specific region)
# - s3.cn-north-1.amazonaws.com.cn - (Beijing region)
# - bukkit.s3.cn-north-1.amazonaws.com.cn - (Vhosted Beijing region)
parts = self.split_host_parts(host)
if self.region_name is not None:
region_name = self.region_name
else:
# Classic URLs - s3-us-west-2.amazonaws.com
if len(parts) == 3:
region_name = self.clean_region_name(parts[0])
# Special-case for Classic.
if region_name == 's3':
region_name = 'us-east-1' #这里有个坑，下面会讲
else:
# Iterate over the parts in reverse order.
for offset, part in enumerate(reversed(parts)):
part = part.lower()
# Look for the first thing starting with 's3'.
# Until there's a ``.s3`` TLD, we should be OK. :P
if part == 's3':
# If it's by itself, the region is the previous part.
region_name = parts[-offset]
# Unless it's Vhosted classic
if region_name == 'amazonaws':
region_name = 'us-east-1'
break
elif part.startswith('s3-'):
region_name = self.clean_region_name(part)
break
return region_name走读boto代码，发现其实region_name字段就是将host按"."进行切分，取前面部分进行处理得出，如果host为ceph.work，那么切分出来的"ceph"当然对应不上了，所以想要让boto支持AWS4，你的host必须有3个字段，比如"s3.ceph.work"。如果你采取掩耳盗铃方式，只是去调整boto代码如下
from boto.s3.connection import S3Connection import boto import os os.environ['S3_USE_SIGV4'] = 'True' endpoint = 's3.ceph.work' #新增一个字段 bucket_name = 'test1' access_key = '' secret_key = '' conn = boto.connect_s3( aws_access_key_id=access_key, aws_secret_access_key=secret_key, host=endpoint, is_secure=False, calling_format=boto.s3.connection.SubdomainCallingFormat(), validate_certs=True, ) bucket = conn.get_all_buckets() print bucket
那么你将看到如下异常
Traceback (most recent call last): ... File "/Users/Diluga/lwc/lib/python2.7/site-packages/boto/s3/connection.py", line 444, in get_all_buckets response.status, response.reason, body) boto.exception.S3ResponseError: S3ResponseError: 400 Bad RequestInvalidBucketNames3 tx000000000000000000001-0058d4d9ad-85cc-default 85cc-default-default
这个400错误，说明你提交数据的姿势不对，
从抓包来看这个us-east-1就是你提交的region_name了，这里也给我们埋了一个坑，如果我们的host第一个字段是"s3"，那么region_name就是被硬编码成了"us-east-1",如果是"s3-abc"或者是其他，则region_name变成我们自定义的字段，好在ceph默认是允许你在request header里面随便填region_name，不然就真的悲剧了。
这里正确的姿势应该是调整ceph.conf里面的rgw配置如下.
方案1
[client.radosgw.cn-zone1] rgw dns name = s3.ceph.work #原有host基础上新增一个字段，boto提交的region_name会是"us-east-1" rgw frontends = fastcgi socket_port=9000 socket_host=127.0.0.1 host = demo keyring = /etc/ceph/ceph.client.radosgw.keyring rgw socket path = /home/ceph/var/run/ceph-client.radosgw.cn-zone1.sock log file = /home/ceph/log/radosgw.cn-zone1.log rgw print continue = false rgw content length compat = true
方案2
[client.radosgw.cn-zone1] rgw dns name = s3-abc.ceph.work #原有host基础上新增一个字段，boto提交的region_name会是"abc" rgw frontends = fastcgi socket_port=9000 socket_host=127.0.0.1 host = demo keyring = /etc/ceph/ceph.client.radosgw.keyring rgw socket path = /home/ceph/var/run/ceph-client.radosgw.cn-zone1.sock log file = /home/ceph/log/radosgw.cn-zone1.log rgw print continue = false rgw content length compat = true
感谢各位的阅读，以上就是“boto支持aws4引发的错误怎么解决”的内容了，经过本文的学习后，相信大家对boto支持aws4引发的错误怎么解决这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是创新互联，小编将为大家推送更多相关知识点的文章，欢迎关注！
