glusterfs

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#!/usr/bin/python3
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#
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# Copyright (c) 2016 Red Hat, Inc. <http://www.redhat.com>
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# This file is part of GlusterFS.
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#
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# This file is licensed to you under your choice of the GNU Lesser
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# General Public License, version 3 or any later version (LGPLv3 or
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# later), or the GNU General Public License, version 2 (GPLv2), in all
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# cases as published by the Free Software Foundation.
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#
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# Generates unique epoch value on each gluster node to be used by
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# nfs-ganesha service on that node.
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#
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# Configure 'EPOCH_EXEC' option to this script path in
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# '/etc/sysconfig/ganesha' file used by nfs-ganesha service.
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#
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# Construct epoch as follows -
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#        first 32-bit contains the now() time
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#        rest 32-bit value contains the local glusterd node uuid
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import time
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import binascii
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# Calculate the now() time into a 64-bit integer value
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def epoch_now():
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        epoch_time = int(time.mktime(time.localtime())) << 32
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        return epoch_time
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# Read glusterd UUID and extract first 32-bit of it
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def epoch_uuid():
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        file_name = '/var/lib/glusterd/glusterd.info'
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        for line in open(file_name):
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                if "UUID" in line:
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                        glusterd_uuid = line.split('=')[1].strip()
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        uuid_bin = binascii.unhexlify(glusterd_uuid.replace("-",""))
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        epoch_uuid = int(binascii.hexlify(uuid_bin), 32) & 0xFFFF0000
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        return epoch_uuid
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# Construct epoch as follows -
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#        first 32-bit contains the now() time
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#        rest 32-bit value contains the local glusterd node uuid
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epoch = (epoch_now() | epoch_uuid())
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print((str(epoch)))
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exit(0)
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