root / rbd / grow @ 68abdf0d
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#!/usr/bin/env python |
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# |
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# Copyright (C) 2011 Greek Research and Technology Network |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, but |
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# WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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# General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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# 02110-1301, USA. |
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|
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"""Grow an existing rbd Image |
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|
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This program grows an existing rbd Image which resides in a |
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RADOS cluster |
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It takes it's input from environment variables. Specifically the |
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following variables should be present: |
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|
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- VOL_NAME: The name of the Image to grow |
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- POOL: The RADOS pool in which the Image resides |
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- VOL_SIZE: The current Image's size |
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- VOL_NEW_SIZE: The new size of the Image after it's grown |
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Returns 0 upon successful grow, 1 upon failure |
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""" |
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|
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import os |
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import sys |
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|
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sys.path.insert(0, "/etc/ganeti/share") |
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from ganeti import utils |
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def ReadEnv(): |
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"""Read the mandatory enviromental variables |
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|
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""" |
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name = os.getenv("VOL_NAME") |
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if name is None: |
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sys.stderr.write('The environment variable VOL_NAME is missing.\n') |
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return None |
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# pool = os.getenv("POOL") |
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pool = "rbd" |
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if pool is None: |
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sys.stderr.write('The environment variable POOL is missing.\n') |
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return None |
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new_size = os.getenv("VOL_NEW_SIZE") |
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if new_size is None: |
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sys.stderr.write('The environment variable VOL_NEW_SIZE is missing.\n') |
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return None |
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|
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return (name, pool, new_size) |
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|
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def main(): |
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env = ReadEnv() |
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if env is None: |
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sys.stderr.write('Wrong environment. Aborting...\n') |
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return 1 |
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rbd_name, rbd_pool, new_size = env |
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cmd = ["rbd", "resize", "-p", "%s" % rbd_pool, "%s" % rbd_name, |
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"--size", "%s" % new_size] |
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result = utils.RunCmd(cmd) |
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if result.failed: |
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sys.stderr.write('rbd resize failed (%s): %s\n' % |
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(result.fail_reason, result.output)) |
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return 1 |
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return 0 |
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|
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if __name__ == "__main__": |
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sys.exit(main()) |