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这篇文章主要讲解了“基于boto的s3cmd versioning功能怎么使用”,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“基于boto的s3cmd versioning功能怎么使用”吧!
1. 开启versioning特性是针对整个bucket的,不能针对单独的object启停该特性。
2. 开启versioning以后,所有的操作都要基于object对应的version-id进行操作。
3. object的ACL权限设置取决于最新的object版本
4. 开启versioning以后,如果需要删除object,应该先删除对应object的所有version,之后再删除object。
5. 开启versioning以后,object的每个version都会占用一个独立的object空间,所以合理规划避免空间的浪费。
6. 测试jewel(ceph 10.2.6)的AWS2和AWS4都可以使用该特性,暂未发现有bug。
# -*- coding: utf-8 -*- from boto.s3.connection import S3Connection import boto import os import requests os.environ['S3_USE_SIGV4'] = 'True' endpoint = 's3.ceph.work' bucket_name = 'version-test4' access_key = '' secret_key = '' key_name = 'version_object2' 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, ) content_info = 'content_' #新建bucket并启用versioning特性 bucket = conn.create_bucket(bucket_name) print "get versioning status={}".format(bucket.get_versioning_status()) bucket.configure_versioning(True) print "afert set versioning=enable,get versioning status={}".format(bucket.get_versioning_status()) #新建一个obj的5个不同版本 for i in range(5): content_ = "{}{}".format(content_info,i) key_ = bucket.new_key(key_name) key_.set_metadata('metadata',i) key_.set_contents_from_string(content_) #获取obj的versioning列表及相关属性 bucket = conn.get_bucket(bucket_name) version_list_ = [] for i in bucket.list_versions(prefix=key_name): key_ = bucket.get_key(key_name,version_id=i.version_id) print "content={} version_id={} etag={} acl={} metadata={}".format(key_.get_contents_as_string(version_id=i.version_id),i.version_id,i.etag,bucket.get_acl(key_name,version_id=i.version_id),key_.get_metadata('metadata')) version_list_.append(i.version_id) #带verioning的obj的ACL设置 key_ = bucket.get_key(key_name) print "get key acl={}".format(key_.get_acl()) key_.set_acl('public-read') print "after set key acl=public-read,get key acl={}".format(key_.get_acl()) url_ = "http://{}.{}/{}".format(bucket_name,endpoint,key_name) resp = requests.get(url_) #下载会失败 if resp.status_code == 200: print "before set acl=public-read -> download successful!" else: print "before set acl=public-read -> download failed" #设置最新的version-id对应的obj的ACL bucket.set_acl('public-read', key_name, version_id=version_list_[0]) resp = requests.get(url_) #成功下载 if resp.status_code == 200: print "after set acl=public-read ->download successful!" else: print "after set acl=public-read -> download failed" #当前obj的ACL就是最新version-id的ACL key_ = bucket.get_key(key_name) print "get key acl = {}".format(key_.get_acl()) key_ = bucket.get_key(key_name,version_id=version_list_[0]) print "get key version_id={} acl= {}".format(version_list_[0],key_.get_acl()) #生成当前obj的URL key_ = bucket.get_key(key_name) print "generate_url={}".format(key_.generate_url(300)) #version 回滚操作,获取当前object信息 key_ = bucket.get_key(key_name) print "before roll back, content={} metadata={}".format(key_.get_contents_as_string(),key_.get_metadata('metadata')) #回滚到指定version_id,并获取当前对应版本的object信息 key_ = bucket.get_key(key_name,version_id=version_list_[-1]) metadata_ = {'metadata': key_.get_metadata('metadata')} print "roll back to version_id={} content_={} metadata={}".format(version_list_[-1],key_.get_contents_as_string(version_id=version_list_[-1]),key_.get_metadata('metadata')) bucket.copy_key(key_name, bucket_name, key_name ,metadata=metadata_, src_version_id=version_list_[-1]) #回滚完成,检查当前object信息 key_ = bucket.get_key(key_name) print "after roll back, content={} metadata={}".format(key_.get_contents_as_string(),key_.get_metadata('metadata')) #删除key key_ = bucket.get_key(key_name) key_.delete() bucket = conn.get_bucket(bucket_name) #obj对应的 versioning 依然存在 for i in bucket.list_versions(prefix=key_name): key_ = bucket.get_key(key_name) print "key {} was deleted,but version_id={} remain".format(i.name,i.version_id) #就算关闭versioning, obj对应的 versioning 依然存在 bucket.configure_versioning(False) for i in bucket.list_versions(prefix=key_name): key_ = bucket.get_key(key_name) print "get key={} version_id={}".format(i.name,i.version_id) #批量删除versioning for i in bucket.list_versions(prefix=key_name): bucket.delete_key(key_name,version_id=i.version_id) print "deleted versioning -> {}".format(i.version_id) # print i.name,i.version_id #彻底清除 for i in bucket.list_versions(prefix=key_name): key_ = bucket.get_key(key_name) print i.name,i.version_id
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