133 lines
4.8 KiB
Python
133 lines
4.8 KiB
Python
#
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# Copyright (c) 2013-2014 Wind River Systems, Inc.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# All Rights Reserved.
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#
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""" inventory ipy Utilities and helper functions."""
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import subprocess
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import sys
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from sysinv.common import constants
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from sysinv.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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class LVGOperator(object):
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'''Class to encapsulate Physical Volume operations for System Inventory'''
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def __init__(self):
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pass
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def handle_exception(self, e):
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traceback = sys.exc_info()[-1]
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LOG.error("%s @ %s:%s" % (e, traceback.tb_frame.f_code.co_filename,
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traceback.tb_lineno))
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def thinpools_in_vg(self, vg, cinder_device=None):
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"""Return number of thinpools in the specified vg. """
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try:
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command = ['vgs', '--noheadings', '-o', 'lv_name', vg]
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if cinder_device:
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if vg == constants.LVG_CINDER_VOLUMES:
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global_filer = 'devices/global_filter=["a|' + \
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cinder_device + '|","r|.*|"]'
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command = command + ['--config', global_filer]
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output = subprocess.check_output(command)
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except Exception as e:
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self.handle_exception("Could not retrieve vgdisplay "
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"information: %s" % e)
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output = ""
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thinpools = 0
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for line in output.splitlines():
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# This makes some assumptions, the suffix is defined in nova.
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if constants.LVM_POOL_SUFFIX in line:
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thinpools += 1
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return thinpools
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def ilvg_get(self, cinder_device=None):
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'''Enumerate physical volume topology based on:
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:param self
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:param cinder_device: by-path of cinder device
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:returns list of disk and attributes
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'''
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ilvg = []
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# keys: matching the field order of pvdisplay command
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string_keys = ['lvm_vg_name', 'lvm_vg_uuid', 'lvm_vg_access',
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'lvm_max_lv', 'lvm_cur_lv', 'lvm_max_pv',
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'lvm_cur_pv', 'lvm_vg_size', 'lvm_vg_total_pe',
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'lvm_vg_free_pe']
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# keys that need to be translated into ints
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int_keys = ['lvm_max_lv', 'lvm_cur_lv', 'lvm_max_pv',
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'lvm_cur_pv', 'lvm_vg_size', 'lvm_vg_total_pe',
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'lvm_vg_free_pe']
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# pvdisplay command to retrieve the pv data of all pvs present
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vgdisplay_command = 'vgdisplay -C --aligned -o vg_name,vg_uuid,vg_attr'\
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',max_lv,lv_count,max_pv,pv_count,vg_size,'\
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'vg_extent_count,vg_free_count'\
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' --units B --nosuffix --noheadings'
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# Execute the command
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try:
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vgdisplay_process = subprocess.Popen(vgdisplay_command,
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stdout=subprocess.PIPE,
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shell=True)
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vgdisplay_output = vgdisplay_process.stdout.read()
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except Exception as e:
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self.handle_exception("Could not retrieve vgdisplay "
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"information: %s" % e)
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vgdisplay_output = ""
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# Cinder devices are hidden by global_filter, list them separately.
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if cinder_device:
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new_global_filer = ' --config \'devices/global_filter=["a|' + \
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cinder_device + '|","r|.*|"]\''
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vgdisplay_command = vgdisplay_command + new_global_filer
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try:
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vgdisplay_process = subprocess.Popen(vgdisplay_command,
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stdout=subprocess.PIPE,
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shell=True)
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vgdisplay_output = vgdisplay_output + vgdisplay_process.stdout.read()
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except Exception as e:
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self.handle_exception("Could not retrieve vgdisplay "
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"information: %s" % e)
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# parse the output 1 vg/row
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for row in vgdisplay_output.split('\n'):
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# get the values of fields as strings
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values = row.split()
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# create the dict of attributes
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attr = dict(zip(string_keys, values))
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# convert required values from strings to ints
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for k in int_keys:
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if k in attr.keys():
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attr[k] = int(attr[k])
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# subtract any thinpools from the lv count
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if 'lvm_cur_lv' in attr:
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attr['lvm_cur_lv'] -= self.thinpools_in_vg(attr['lvm_vg_name'],
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cinder_device)
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# Make sure we have attributes
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if attr:
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ilvg.append(attr)
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LOG.debug("ilvg= %s" % ilvg)
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return ilvg
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