Sample how to find and access object and container data on a Swift storage node.

walk_swift_storage.py

#!/usr/bin/env python
# Copyright (c) 2014 Christian Schwede <christian.schwede@enovance.com>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import os
import cPickle as pickle
import sqlite3
import xattr


def _get_acc_cont_obj(filename):
        obj_fd = open(filename)
        metadata = ''
        key = 0
        try:
            while True:
                metadata += xattr.getxattr(
                    obj_fd, '%s%s' % ("user.swift.metadata", (key or '')))
                key += 1
        except IOError:
            pass
        obj_fd.close()
        return pickle.loads(metadata).get('name')


def _get_object_names(filename):
    conn = sqlite3.connect(filename)
    c = conn.cursor()
    c.execute('SELECT account, container FROM container_stat;')
    account, container = c.fetchone()

    objects = []

    for obj in c.execute('SELECT name FROM object;'):
        objname = obj[0]
        if objname:
            name = "/%s/%s/%s" % (account, container, objname)
            if unicode(name):
                name = name.encode('utf8')
            objects.append(name)
    return objects


if __name__ == "__main__":
    for root, _dirs, files in os.walk(".", followlinks=True):
        if "quarantined" in root:
            continue
        for filename in files:
            fullname = os.path.join(root, filename)
            if fullname.split('.')[-1] == "data":
                objname = _get_acc_cont_obj(fullname)
                # Do something here with the object data file, for example:
                print fullname, objname

            if fullname.split('.')[-1] == "db":
                objects = _get_object_names(fullname)
                # Do something here with the container data, for example:
                print fullname, objects