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c829e3a13b
With this change, MinIO's ILM supports transitioning objects to a remote tier. This change includes support for Azure Blob Storage, AWS S3 compatible object storage incl. MinIO and Google Cloud Storage as remote tier storage backends. Some new additions include: - Admin APIs remote tier configuration management - Simple journal to track remote objects to be 'collected' This is used by object API handlers which 'mutate' object versions by overwriting/replacing content (Put/CopyObject) or removing the version itself (e.g DeleteObjectVersion). - Rework of previous ILM transition to fit the new model In the new model, a storage class (a.k.a remote tier) is defined by the 'remote' object storage type (one of s3, azure, GCS), bucket name and a prefix. * Fixed bugs, review comments, and more unit-tests - Leverage inline small object feature - Migrate legacy objects to the latest object format before transitioning - Fix restore to particular version if specified - Extend SharedDataDirCount to handle transitioned and restored objects - Restore-object should accept version-id for version-suspended bucket (#12091) - Check if remote tier creds have sufficient permissions - Bonus minor fixes to existing error messages Co-authored-by: Poorna Krishnamoorthy <poorna@minio.io> Co-authored-by: Krishna Srinivas <krishna@minio.io> Signed-off-by: Harshavardhana <harsha@minio.io>
79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
# -*- coding: utf-8 -*-
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from xml.etree import cElementTree
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from xml.etree.cElementTree import ParseError
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if hasattr(cElementTree, 'ParseError'):
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_ETREE_EXCEPTIONS = (ParseError, AttributeError, ValueError, TypeError)
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else:
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_ETREE_EXCEPTIONS = (SyntaxError, AttributeError, ValueError, TypeError)
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_STS_NS = {'sts': 'https://sts.amazonaws.com/doc/2011-06-15/'}
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class STSElement(object):
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"""STS aware XML parsing class. Wraps a root element name and
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cElementTree.Element instance. Provides STS namespace aware parsing
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functions.
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"""
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def __init__(self, root_name, element):
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self.root_name = root_name
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self.element = element
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@classmethod
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def fromstring(cls, root_name, data):
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"""Initialize STSElement from name and XML string data.
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:param name: Name for XML data. Used in XML errors.
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:param data: string data to be parsed.
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:return: Returns an STSElement.
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"""
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try:
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return cls(root_name, cElementTree.fromstring(data))
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except _ETREE_EXCEPTIONS as error:
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raise InvalidXMLError(
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'"{}" XML is not parsable. Message: {}'.format(
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root_name, error.message
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)
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)
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def findall(self, name):
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"""Similar to ElementTree.Element.findall()
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"""
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return [
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STSElement(self.root_name, elem)
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for elem in self.element.findall('sts:{}'.format(name), _STS_NS)
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]
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def find(self, name):
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"""Similar to ElementTree.Element.find()
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"""
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elt = self.element.find('sts:{}'.format(name), _STS_NS)
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return STSElement(self.root_name, elt) if elt is not None else None
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def get_child_text(self, name, strict=True):
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"""Extract text of a child element. If strict, and child element is
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not present, raises InvalidXMLError and otherwise returns
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None.
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"""
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if strict:
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try:
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return self.element.find('sts:{}'.format(name), _STS_NS).text
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except _ETREE_EXCEPTIONS as error:
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raise InvalidXMLError(
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('Invalid XML provided for "{}" - erroring tag <{}>. '
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'Message: {}').format(self.root_name, name, error.message)
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)
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else:
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return self.element.findtext('sts:{}'.format(name), None, _STS_NS)
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def text(self):
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"""Fetch the current node's text
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"""
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return self.element.text
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