mdadm done
This commit is contained in:
brent s
parent
7e6736f6a2
commit
f424938913
@ -4,10 +4,12 @@ import aif.disk.lvm as lvm
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import aif.disk.mdadm as mdadm
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BlockDev = _common.BlockDev
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_BlockDev = _common.BlockDev
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class LUKS(object):
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def __init__(self, partobj):
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def __init__(self, luks_xml, partobj):
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self.xml = luks_xml
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_common.addBDPlugin('crypto')
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self.devpath = None
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pass
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@ -4,6 +4,7 @@ import aif.disk.mdadm_fallback as mdadm
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class LUKS(object):
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def __init__(self, partobj):
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def __init__(self, luks_xml, partobj):
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self.xml = luks_xml
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self.devpath = None
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pass
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@ -8,17 +8,23 @@ _BlockDev = _common.BlockDev
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class PV(object):
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def __init__(self, partobj):
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def __init__(self, pv_xml, partobj):
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self.xml = pv_xml
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_common.addBDPlugin('lvm')
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self.devpath = None
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pass
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class VG(object):
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def __init__(self, vg_xml, lv_objs):
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self.xml = vg_xml
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_common.addBDPlugin('lvm')
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self.devpath = None
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pass
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class LV(object):
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def __init__(self, lv_xml, pv_objs):
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self.xml = lv_xml
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_common.addBDPlugin('lvm')
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pass
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@ -1,4 +1,6 @@
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import datetime
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import re
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import uuid
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##
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import aif.utils
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import aif.constants
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@ -11,16 +13,6 @@ import aif.disk.lvm as lvm
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_BlockDev = _common.BlockDev
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_mdblock_size_re = re.compile(r'^(?P<sectors>[0-9]+)\s+'
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r'\((?P<GiB>[0-9.]+)\s+GiB\s+'
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r'(?P<GB>[0-9.]+)\s+GB\)')
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_mdblock_unused_re = re.compile(r'^before=(?P<before>[0-9]+)\s+sectors,'
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r'\s+after=(?P<after>[0-9]+)\s+sectors$')
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_mdblock_badblock_re = re.compile(r'^(?P<entries>[0-9]+)\s+entries'
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r'[A-Za-z\s]+'
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r'(?P<offset>[0-9]+)\s+sectors$')
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class Member(object):
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def __init__(self, member_xml, partobj):
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self.xml = member_xml
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@ -36,16 +28,46 @@ class Member(object):
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'aif.disk.luks.LUKS, '
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'aif.disk.lvm.LV, or'
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'aif.disk.mdadm.Array'))
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_common.addBDPlugin('mdraid')
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self.devpath = self.device.devpath
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self.is_superblocked = None
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self.superblock = None
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self._parseDeviceBlock()
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def _parseDeviceBlock(self):
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pass
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# TODO: parity with mdadm_fallback.Member._parseDeviceBlock
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# key names currently (probably) don't match and need to confirm the information's all present
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block = {}
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try:
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_block = _BlockDev.md.examine(self.devpath)
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except _BlockDev.MDRaidError:
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self.is_superblocked = False
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self.superblock = None
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return()
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for k in dir(_block):
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if k.startswith('_'):
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continue
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elif k in ('copy', 'eval'):
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continue
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v = getattr(_block, k)
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if k == 'level':
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v = int(re.sub(r'^raid', '', v))
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elif k == 'update_time':
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v = datetime.datetime.fromtimestamp(v)
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elif re.search('^(dev_)?uuid$', k):
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v = uuid.UUID(hex = v)
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block[k] = v
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self.superblock = block
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self.is_superblocked = True
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return()
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def prepare(self):
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try:
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_BlockDev.md.denominate(self.devpath)
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except _BlockDev.MDRaidError:
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pass
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_BlockDev.md.destroy(self.devpath)
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return()
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class Array(object):
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@ -61,21 +83,132 @@ class Array(object):
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if self.metadata not in aif.constants.MDADM_SUPPORTED_METADATA:
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raise ValueError('Metadata version must be one of: {0}'.format(', '.join(
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aif.constants.MDADM_SUPPORTED_METADATA)))
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_common.addBDPlugin('mdraid')
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self.chunksize = int(self.xml.attrib.get('chunkSize', 512))
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if self.level in (4, 5, 6, 10):
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if not aif.utils.isPowerofTwo(self.chunksize):
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# TODO: log.warn instead of raise exception? Will mdadm lose its marbles if it *isn't* a proper number?
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raise ValueError('chunksize must be a power of 2 for the RAID level you specified')
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if self.level in (0, 4, 5, 6, 10):
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if not aif.utils.hasSafeChunks(self.chunksize):
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# TODO: log.warn instead of raise exception? Will mdadm lose its marbles if it *isn't* a proper number?
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raise ValueError('chunksize must be divisible by 4 for the RAID level you specified')
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self.layout = self.xml.attrib.get('layout', 'none')
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if self.level in aif.constants.MDADM_SUPPORTED_LAYOUTS.keys():
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matcher, layout_default = aif.constants.MDADM_SUPPORTED_LAYOUTS[self.level]
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if not matcher.search(self.layout):
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if layout_default:
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self.layout = layout_default
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else:
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self.layout = None # TODO: log.warn?
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else:
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self.layout = None
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self.devname = self.xml.attrib['name']
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self.fulldevname = '{0}:{1}'.format(self.homehost, self.devname)
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self.devpath = devpath
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if not self.devpath:
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self.devpath = '/dev/md/{0}'.format(self.devname)
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self.updateStatus()
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self.homehost = homehost
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self.members = []
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self.state = None
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self.info = None
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def addMember(self, memberobj):
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pass
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if not isinstance(memberobj, Member):
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raise ValueError('memberobj must be of type aif.disk.mdadm.Member')
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memberobj.prepare()
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self.members.append(memberobj)
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return()
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def create(self):
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pass
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if not self.members:
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raise RuntimeError('Cannot create an array with no members')
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opts = [_BlockDev.ExtraArg.new('--homehost',
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self.homehost),
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_BlockDev.ExtraArg.new('--name',
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self.devname)]
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if self.layout:
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opts.append(_BlockDev.ExtraArg.new('--layout',
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self.layout))
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_BlockDev.md.create(self.devname,
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str(self.level),
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[i.devpath for i in self.members],
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0,
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self.metadata,
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True,
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(self.chunksize * 1024),
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opts)
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for m in self.members:
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m._parseDeviceBlock()
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self.updateStatus()
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self.writeConf()
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self.devpath = self.info['device']
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self.state = 'new'
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return()
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def start(self, scan = False):
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pass
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if not any((self.members, self.devpath)):
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raise RuntimeError('Cannot assemble an array with no members (for hints) or device path')
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if scan:
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target = None
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else:
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target = self.devname
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_BlockDev.md.activate(target,
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[i.devpath for i in self.members], # Ignored if scan mode enabled
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None,
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True,
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None)
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self.state = 'assembled'
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return()
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def stop(self):
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pass
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_BlockDev.md.deactivate(self.devname)
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self.state = 'disassembled'
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return()
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def updateStatus(self):
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pass
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_status = _BlockDev.md.detail(self.devname)
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# TODO: parity with mdadm_fallback.Array.updateStatus
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# key names currently (probably) don't match and need to confirm the information's all present
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info = {}
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for k in dir(_status):
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if k.startswith('_'):
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continue
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elif k in ('copy',):
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continue
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v = getattr(_status, k)
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if k == 'level':
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v = int(re.sub(r'^raid', '', v))
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elif k == 'creation_time':
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# TODO: Is this portable/correct? Or do I need to do something like '%a %b %d %H:%M:%s %Y'?
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v = datetime.datetime.strptime(v, '%c')
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elif k == 'uuid':
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v = uuid.UUID(hex = v)
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info[k] = v
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self.info = info
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return()
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def writeConf(self):
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pass
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def writeConf(self, conf = '/etc/mdadm.conf'):
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with open(conf, 'r') as fh:
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conflines = fh.read().splitlines()
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arrayinfo = ('ARRAY '
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'{device} '
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'metadata={metadata} '
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'name={name} '
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'UUID={converted_uuid}').format(**self.info,
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converted_uuid = _BlockDev.md.get_md_uuid(str(self.info['uuid'])))
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if arrayinfo not in conflines:
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r = re.compile(r'^ARRAY\s+{0}'.format(self.info['device']))
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nodev = True
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for l in conflines:
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if r.search(l):
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nodev = False
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# TODO: logging?
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# and/or Raise an exception here;
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# an array already exists with that name but not with the same opts/GUID/etc.
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break
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if nodev:
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with open(conf, 'a') as fh:
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fh.write('{0}\n'.format(arrayinfo))
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return()
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@ -48,7 +48,8 @@ class Member(object):
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if super.returncode != 0:
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# TODO: logging?
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self.is_superblocked = False
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return(None)
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self.superblock = None
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return()
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block = {}
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for idx, line in enumerate(super.stdout.decode('utf-8').splitlines()):
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line = line.strip()
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@ -69,7 +70,7 @@ class Member(object):
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local_to = re.sub(r'[()]', '', local_to)
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v = (name, local_to)
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elif k == 'raid_level':
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v = re.sub(r'^raid', '', v)
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v = int(re.sub(r'^raid', '', v))
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elif k == 'checksum':
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cksum, status = [i.strip() for i in v.split('-')]
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v = (bytes.fromhex(cksum), status)
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@ -158,6 +159,8 @@ class Array(object):
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self.layout = None
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self.devname = self.xml.attrib['name']
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self.devpath = devpath
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if not self.devpath:
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self.devpath = '/dev/md/{0}'.format(self.devname)
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self.updateStatus()
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self.homehost = homehost
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self.members = []
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@ -175,6 +178,8 @@ class Array(object):
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if not self.members:
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raise RuntimeError('Cannot create an array with no members')
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cmd = ['mdadm', '--create',
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'--name={0}'.format(self.devname),
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'--bitmap=internal',
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'--level={0}'.format(self.level),
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'--metadata={0}'.format(self.metadata),
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'--chunk={0}'.format(self.chunksize),
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@ -187,6 +192,9 @@ class Array(object):
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cmd.append(m.devpath)
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# TODO: logging!
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subprocess.run(cmd)
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for m in self.members:
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m._parseDeviceBlock()
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self.updateStatus()
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self.writeConf()
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self.state = 'new'
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return()
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@ -202,6 +210,7 @@ class Array(object):
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cmd.append('--scan')
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# TODO: logging!
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subprocess.run(cmd)
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self.updateStatus()
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self.state = 'assembled'
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return()
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