怎么禁止S3用户删除Object

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需求描述:需要关闭某些S3账号的删除权限，但是默认DELETE操作是由bucket WIRTE权限进行控制的，无法单独拆分DELETE操作。

解决思路：
1. 过滤前端HTTP请求的DELETE操作(需要写点代码)
2. 修改S3内置用户的metadata信息，本文用的就是这个方法。

1. 确认用户metadata信息

root@demo# radosgw-admin metadata get user:s3user{    "key": "user:s3user",    "ver": {        "tag": "_HUtHU_6yBqHTSzDLb9y8tjX",        "ver": 2    },    "mtime": 1493110079,    "data": {        "user_id": "s3user",        "display_name": "s3user",        "email": "",        "suspended": 0,        "max_buckets": 1000,        "auid": 0,        "subusers": [],        "keys": [            {                "user": "s3user",                "access_key": "xxx",                "secret_key": "xxx"            }        ],        "swift_keys": [],        "caps": [],        "op_mask": "read, write,delete", #这里有delete权限        "default_placement": "",        "placement_tags": [],        "bucket_quota": {            "enabled": false,            "max_size_kb": -1,            "max_objects": -1        },        "user_quota": {            "enabled": false,            "max_size_kb": -1,            "max_objects": -1        },        "temp_url_keys": []    }}

2. 修改用户metadata信息

导出用户metadata

root@demo# radosgw-admin metadata get user:s3user > s3user.json

修改用户metadata

修改生成的s3user.json文件，修改"op_mask"，删除"delete"字段

"op_mask": "read, write",

导入用户metadata

root@demo6# radosgw-admin metadata put  user:s3user < s3user.json

确认配置是否生效

root@demo# radosgw-admin metadata get user:s3user{    "key": "user:s3user",    "ver": {        "tag": "_HUtHU_6yBqHTSzDLb9y8tjX",        "ver": 2    },    "mtime": 1493110079,    "data": {        "user_id": "s3user",        "display_name": "s3user",        "email": "",        "suspended": 0,        "max_buckets": 1000,        "auid": 0,        "subusers": [],        "keys": [            {                "user": "s3user",                "access_key": "xxx",                "secret_key": "xxx"            }        ],        "swift_keys": [],        "caps": [],        "op_mask": "read, write", #delete权限没了        "default_placement": "",        "placement_tags": [],        "bucket_quota": {            "enabled": false,            "max_size_kb": -1,            "max_objects": -1        },        "user_quota": {            "enabled": false,            "max_size_kb": -1,            "max_objects": -1        },        "temp_url_keys": []    }}

3. 验证

from boto.s3.connection import S3Connectionimport botoendpoint = 's3.ceph.work'bucket_name = 'test1'access_key = 'xx'secret_key = 'xx'local_file = '/tmp/ct.shutdown'key_name = 'new_file'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.create_bucket(bucket_name)key_ = bucket.new_key(key_name)key_.set_contents_from_filename(local_file)#方法1bucket.delete_keys([key_name])#方法2# key_.delete()#方法3# bucket.delete_key(key_name)

上面3种方式都会提示403错误

Traceback (most recent call last):.....boto.exception.S3ResponseError: S3ResponseError: 403 ForbiddenAccessDenied

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