mirror of
https://github.com/xcat2/confluent.git
synced 2026-11-12 11:06:17 +00:00
Markus Hilger
4aa6bf8af5
The attribute help promises "a specific device name", but getinstalldisk only understood "m2" and "/dev/<name>". A plain "nvme0n1" aborted the install with "Unknown deployment.storage specification", and a "/dev/<name>" that matched no disk was silently ignored, so the OS went to whatever disk the default ordering picked. For an attribute meant to pin the OS disk that is the dangerous failure mode. Accept a kernel name with or without /dev/ and resolve /dev/disk/by-* links to their kernel name, so a disk can be pinned by a stable path. When nothing matches, fail with "No disks match" like the m2 filter already does. Document the accepted forms in the attribute help.
313 lines
11 KiB
Python
313 lines
11 KiB
Python
#!/usr/bin/python3
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import json
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import subprocess
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import os
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import shutil
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class SilentException(Exception):
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pass
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# List of models that are generally used for OS install disk (generally 2-disk mirroring)
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PRIORITY_MODELS = ('m.2 nvme 2-bay raid kit',
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'thinksystem_m.2_vd',
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'thinksystem m.2',
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'thinksystem_m.2',
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'thinksystem 7mm',
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'thinksystem_7mm',
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'thinksystem_7mm_vd',
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'b540p-2hs', # 7mm or M.2 in rear
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'b540d-2hs', # M.2 in E3.S or 2.5inch
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'b550d-2hs', # Front M.2
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'b550p-2hs', # Rear M.2
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'raid b540p-2hs',
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'raid b540d-2hs',
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'raid b550d-2hs',
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'raid b550p-2hs',
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'raid b540i-2i',
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'raid_b540i-2i',
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'raid b545i-2i',
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'raid b545i-2i',
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'raid_b545-2i')
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BOOT_SLOT_KEYWORDS = ('m.2 socket', '7mm')
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class DiskInfo(object):
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def __init__(self, devname, slotinfo=None):
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if devname.startswith('nvme') and 'c' in devname:
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raise Exception("Skipping multipath devname")
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self.name = devname
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self.wwn = None
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self.path = None
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self.model = ''
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self.size = 0
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self.driver = ''
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self.mdcontainer = ''
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self.subsystype = ''
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self.kernnames = []
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self.vrocmembers = []
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self.is_m2 = False
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self.in_vroc = False
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devnode = '/dev/{0}'.format(devname)
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qprop = subprocess.check_output(
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['udevadm', 'info', '--query=property', devnode])
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if not isinstance(qprop, str):
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qprop = qprop.decode('utf8')
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for prop in qprop.split('\n'):
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if '=' not in prop:
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continue
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k, v = prop.split('=', 1)
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if k == 'DEVTYPE' and v != 'disk':
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if v == 'partition':
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raise SilentException('Partition')
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raise Exception('Not a disk')
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elif k == 'DM_NAME':
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raise SilentException('Device Mapper')
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elif k == 'ID_MODEL':
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self.model = v
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elif k == 'DEVPATH':
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self.path = v
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elif k == 'ID_WWN':
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self.wwn = v
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elif k == 'MD_CONTAINER':
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self.mdcontainer = v
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attrs = subprocess.check_output(['udevadm', 'info', '-a', devnode])
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if not isinstance(attrs, str):
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attrs = attrs.decode('utf8')
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for attr in attrs.split('\n'):
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if '==' not in attr:
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continue
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k, v = attr.split('==', 1)
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k = k.strip()
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if k == 'ATTRS{size}':
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self.size = v.replace('"', '')
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elif (k == 'DRIVERS' and not self.driver
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and v not in ('"sd"', '""')):
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self.driver = v.replace('"', '')
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elif k == 'ATTRS{subsystype}':
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self.subsystype = v.replace('"', '')
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elif k == 'ATTR{ro}' and v == '"1"':
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raise Exception("Device is read-only")
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elif k == 'ATTRS{removable}' and v == '"1"':
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raise Exception("Device is removable")
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elif k == 'ATTRS{address}':
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self.busaddr = v.replace('"', '')
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elif k == 'KERNELS':
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self.kernnames.append(v.replace('"', ''))
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if not getattr(self, 'busaddr', None):
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for kernname in getattr(self, 'kernnames', []):
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if kernname in slotinfo:
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self.is_m2 = True
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break
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if getattr(self, 'busaddr', None) and self.busaddr in slotinfo:
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self.is_m2 = True
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if not self.driver and 'imsm' not in self.mdcontainer and self.subsystype != 'nvm':
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raise Exception("No driver detected")
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if 'imsm' in self.mdcontainer:
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try:
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mdinfo = subprocess.check_output(
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['mdadm', '--detail', '-Y', devnode],
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stderr=subprocess.DEVNULL)
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if not isinstance(mdinfo, str):
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mdinfo = mdinfo.decode('utf8', errors='ignore')
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for line in mdinfo.splitlines():
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key, separator, value = line.partition('=')
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if separator and key.endswith('_DEV'):
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member = value.strip()
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member = member.replace('/dev/', '')
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if member and member not in self.vrocmembers:
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self.vrocmembers.append(member)
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except Exception:
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pass
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if self.driver == 'sr':
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raise Exception('cd/dvd')
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if os.path.exists('/sys/block/{0}/size'.format(self.name)):
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with open('/sys/block/{0}/size'.format(self.name), 'r') as sizesrc:
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self.size = int(sizesrc.read()) * 512
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if int(self.size) < 2147483648:
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raise Exception("Device too small for install ({}MiB)".format(int(self.size)/1024/1024))
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@property
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def priority(self):
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if self.in_vroc:
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return 99 # prefer the assembled array over the member disks
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if self.is_m2:
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return 0
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if self.model.lower() in PRIORITY_MODELS:
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return 0
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if 'imsm' in self.mdcontainer:
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return 1
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if self.driver == 'ahci':
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return 2
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if self.driver.startswith('megaraid'):
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return 3
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if self.driver.startswith('mpt'):
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return 4
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return 99
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def __repr__(self):
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return repr({
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'name': self.name,
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'path': self.path,
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'wwn': self.wwn,
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'driver': self.driver,
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'size': self.size,
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'model': self.model,
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})
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def get_dmi_type9_info():
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dmidecode = shutil.which('dmidecode')
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if not dmidecode:
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return {}
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try:
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dmio = subprocess.check_output(
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[dmidecode, '--type', '9'], stderr=subprocess.DEVNULL)
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except Exception:
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return {}
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if not isinstance(dmio, str):
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dmio = dmio.decode('utf8', errors='ignore')
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slots = {}
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currentslot = None
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for line in dmio.split('\n'):
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stripped = line.strip()
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if not stripped:
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if currentslot:
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busaddr = currentslot.get('bus_address', None)
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if busaddr:
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slots[busaddr] = currentslot
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currentslot = None
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continue
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if stripped.startswith('Handle ') and ', DMI type 9,' in stripped:
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if currentslot:
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busaddr = currentslot.get('bus_address', None)
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if busaddr:
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slots[busaddr] = currentslot
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currentslot = {'handle': stripped.split(',', 1)[0].split(' ', 1)[1]}
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continue
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if currentslot is None:
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continue
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if ':' not in stripped:
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continue
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key, val = stripped.split(':', 1)
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key = key.strip().lower().replace(' ', '_')
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currentslot[key] = val.strip()
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if currentslot:
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busaddr = currentslot.get('bus_address', None)
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if busaddr:
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slots[busaddr] = currentslot
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return slots
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def get_m2_slot_info():
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slots = get_dmi_type9_info()
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m2slots = {}
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for slot in slots.values():
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label = '{0} {1}'.format(
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slot.get('type', ''), slot.get('designation', '')).lower()
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if not any(x in label for x in BOOT_SLOT_KEYWORDS):
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continue
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busaddr = slot.get('bus_address', None)
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if not busaddr:
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continue
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m2slots[busaddr] = slot
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return m2slots
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def get_deployment_storage():
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apiclient = None
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for clientpath in ('/opt/confluent/bin/apiclient', '/etc/confluent/apiclient'):
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if os.path.exists(clientpath):
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apiclient = clientpath
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break
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if not apiclient:
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return None
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for attriburl in ('/confluent-api/self/myattrib', '/confluent-api/self/myattribs'):
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try:
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attribs = subprocess.check_output(
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['python3', apiclient, attriburl, '-j'], stderr=subprocess.DEVNULL)
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if not isinstance(attribs, str):
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attribs = attribs.decode('utf8')
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attribs = json.loads(attribs)
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if not isinstance(attribs, dict):
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continue
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storage = attribs.get('deployment.storage', None)
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if isinstance(storage, str) and storage.strip():
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return storage.strip()
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except Exception:
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continue
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return None
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def filter_deployment_storage(disks, storagespec, slotinfo=None):
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if not storagespec:
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return disks
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spec = storagespec.strip()
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if spec.lower() != 'm2':
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# A device name with or without /dev/, or a persistent link such as
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# /dev/disk/by-path/..., resolved to its kernel name
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if spec.startswith('/dev/'):
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spec = os.path.realpath(spec)
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devname = os.path.basename(spec).lower()
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for disk in disks:
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if disk.name.lower() == devname:
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return [disk]
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raise Exception("No disks match deployment.storage specification: {0}".format(storagespec))
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for disk in list(disks):
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if disk.is_m2:
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continue
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if disk.model.lower() in PRIORITY_MODELS:
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continue
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if slotinfo is None:
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slotinfo = get_m2_slot_info()
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if not getattr(disk, 'busaddr', None):
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for kernname in getattr(disk, 'kernnames', []):
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if kernname in slotinfo:
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break
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else:
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disks.remove(disk)
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continue
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if disk.busaddr not in slotinfo:
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disks.remove(disk)
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if not disks:
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raise Exception("No disks match deployment.storage specification: {0}".format(storagespec))
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return disks
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def attach_member_disks(disks):
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for disk in disks:
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num_vroc_members = len(getattr(disk, 'vrocmembers', []))
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for vrocmember in getattr(disk, 'vrocmembers', []):
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for memberdisk in disks:
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if memberdisk.name == vrocmember:
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memberdisk.in_vroc = True
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if memberdisk.is_m2:
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disk.is_m2 = True
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else:
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if num_vroc_members == 2 and 'nvme' in vrocmember:
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# This is not assured, but is likely
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# Unfortunately, some VMD configurations blow past any way to detect form factor
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# as DMI table may not include
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disk.is_m2 = True
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def main():
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disks = []
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slotinfo = get_m2_slot_info()
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for disk in sorted(os.listdir('/sys/class/block')):
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try:
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disk = DiskInfo(disk, slotinfo=slotinfo)
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disks.append(disk)
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except SilentException:
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pass
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except Exception as e:
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print("Skipping {0}: {1}".format(disk, str(e)))
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attach_member_disks(disks)
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disks = filter_deployment_storage(disks, get_deployment_storage(), slotinfo=slotinfo)
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nd = [x.name for x in sorted(disks, key=lambda x: [x.priority, x.size])]
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if nd:
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open('/tmp/installdisk', 'w').write(nd[0])
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else:
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raise Exception("No suitable install disk found")
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if __name__ == '__main__':
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main()
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