mirror of
git://sourceware.org/git/lvm2.git
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699ccc05ca
We were not adding background tasks to flight recorder. Add the meta data to the flight recorder when we start the command and update the meta data when the command is finished. Locking was added to meta data to prevent concurrent update and returning string representation as these can happen in two different threads.
755 lines
18 KiB
Python
755 lines
18 KiB
Python
# Copyright (C) 2015-2016 Red Hat, Inc. All rights reserved.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions
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# of the GNU General Public License v.2.
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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, see <http://www.gnu.org/licenses/>.
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from subprocess import Popen, PIPE
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import time
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import threading
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from itertools import chain
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import collections
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import traceback
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import os
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from lvmdbusd import cfg
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from lvmdbusd.utils import pv_dest_ranges, log_debug, log_error, add_no_notify
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from lvmdbusd.lvm_shell_proxy import LVMShellProxy
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try:
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import simplejson as json
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except ImportError:
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import json
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SEP = '{|}'
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total_time = 0.0
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total_count = 0
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# We need to prevent different threads from using the same lvm shell
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# at the same time.
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cmd_lock = threading.RLock()
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class LvmExecutionMeta(object):
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def __init__(self, start, ended, cmd, ec, stdout_txt, stderr_txt):
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self.lock = threading.RLock()
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self.start = start
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self.ended = ended
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self.cmd = cmd
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self.ec = ec
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self.stdout_txt = stdout_txt
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self.stderr_txt = stderr_txt
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def __str__(self):
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with self.lock:
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return "EC= %d for %s\n" \
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"STARTED: %f, ENDED: %f\n" \
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"STDOUT=%s\n" \
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"STDERR=%s\n" % \
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(self.ec, str(self.cmd), self.start, self.ended, self.stdout_txt,
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self.stderr_txt)
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class LvmFlightRecorder(object):
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def __init__(self, size=16):
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self.queue = collections.deque(maxlen=size)
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def add(self, lvm_exec_meta):
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self.queue.append(lvm_exec_meta)
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def dump(self):
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with cmd_lock:
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if len(self.queue):
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log_error("LVM dbus flight recorder START")
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for c in self.queue:
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log_error(str(c))
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log_error("LVM dbus flight recorder END")
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cfg.blackbox = LvmFlightRecorder()
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def _debug_c(cmd, exit_code, out):
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log_error('CMD= %s' % ' '.join(cmd))
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log_error(("EC= %d" % exit_code))
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log_error(("STDOUT=\n %s\n" % out[0]))
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log_error(("STDERR=\n %s\n" % out[1]))
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def call_lvm(command, debug=False):
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"""
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Call an executable and return a tuple of exitcode, stdout, stderr
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:param command: Command to execute
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:param debug: Dump debug to stdout
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"""
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# print 'STACK:'
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# for line in traceback.format_stack():
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# print line.strip()
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# Prepend the full lvm executable so that we can run different versions
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# in different locations on the same box
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command.insert(0, cfg.LVM_CMD)
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command = add_no_notify(command)
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process = Popen(command, stdout=PIPE, stderr=PIPE, close_fds=True,
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env=os.environ)
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out = process.communicate()
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stdout_text = bytes(out[0]).decode("utf-8")
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stderr_text = bytes(out[1]).decode("utf-8")
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if debug or process.returncode != 0:
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_debug_c(command, process.returncode, (stdout_text, stderr_text))
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return process.returncode, stdout_text, stderr_text
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# The actual method which gets called to invoke the lvm command, can vary
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# from forking a new process to using lvm shell
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_t_call = call_lvm
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def _shell_cfg():
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global _t_call
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# noinspection PyBroadException
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try:
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lvm_shell = LVMShellProxy()
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_t_call = lvm_shell.call_lvm
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cfg.SHELL_IN_USE = lvm_shell
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return True
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except Exception:
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_t_call = call_lvm
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cfg.SHELL_IN_USE = None
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log_error(traceback.format_exc())
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log_error("Unable to utilize lvm shell, dropping back to fork & exec")
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return False
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def set_execution(shell):
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global _t_call
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with cmd_lock:
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# If the user requested lvm shell and we are currently setup that
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# way, just return
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if cfg.SHELL_IN_USE and shell:
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return True
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else:
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if not shell and cfg.SHELL_IN_USE:
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cfg.SHELL_IN_USE.exit_shell()
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cfg.SHELL_IN_USE = None
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_t_call = call_lvm
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if shell:
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if cfg.args.use_json:
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return _shell_cfg()
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else:
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return False
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return True
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def time_wrapper(command, debug=False):
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global total_time
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global total_count
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with cmd_lock:
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start = time.time()
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results = _t_call(command, debug)
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ended = time.time()
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total_time += (ended - start)
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total_count += 1
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cfg.blackbox.add(LvmExecutionMeta(start, ended, command, *results))
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return results
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call = time_wrapper
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# Default cmd
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# Place default arguments for every command here.
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def _dc(cmd, args):
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c = [cmd, '--noheading', '--separator', '%s' % SEP, '--nosuffix',
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'--unbuffered', '--units', 'b']
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c.extend(args)
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return c
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def parse(out):
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rc = []
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for line in out.split('\n'):
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# This line includes separators, so process them
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if SEP in line:
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elem = line.split(SEP)
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cleaned_elem = []
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for e in elem:
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e = e.strip()
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cleaned_elem.append(e)
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if len(cleaned_elem) > 1:
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rc.append(cleaned_elem)
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else:
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t = line.strip()
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if len(t) > 0:
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rc.append(t)
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return rc
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def parse_column_names(out, column_names):
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lines = parse(out)
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rc = []
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for i in range(0, len(lines)):
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d = dict(list(zip(column_names, lines[i])))
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rc.append(d)
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return rc
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def options_to_cli_args(options):
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rc = []
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for k, v in list(dict(options).items()):
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if k.startswith("-"):
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rc.append(k)
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else:
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rc.append("--%s" % k)
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if v != "":
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rc.append(str(v))
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return rc
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def pv_remove(device, remove_options):
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cmd = ['pvremove']
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cmd.extend(options_to_cli_args(remove_options))
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cmd.append(device)
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return call(cmd)
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def _qt(tag_name):
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return '@%s' % tag_name
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def _tag(operation, what, add, rm, tag_options):
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cmd = [operation]
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cmd.extend(options_to_cli_args(tag_options))
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if isinstance(what, list):
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cmd.extend(what)
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else:
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cmd.append(what)
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if add:
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cmd.extend(list(chain.from_iterable(
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('--addtag', _qt(x)) for x in add)))
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if rm:
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cmd.extend(list(chain.from_iterable(
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('--deltag', _qt(x)) for x in rm)))
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return call(cmd, False)
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def pv_tag(pv_devices, add, rm, tag_options):
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return _tag('pvchange', pv_devices, add, rm, tag_options)
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def vg_tag(vg_name, add, rm, tag_options):
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return _tag('vgchange', vg_name, add, rm, tag_options)
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def lv_tag(lv_name, add, rm, tag_options):
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return _tag('lvchange', lv_name, add, rm, tag_options)
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def vg_rename(vg, new_name, rename_options):
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cmd = ['vgrename']
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cmd.extend(options_to_cli_args(rename_options))
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cmd.extend([vg, new_name])
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return call(cmd)
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def vg_remove(vg_name, remove_options):
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cmd = ['vgremove']
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cmd.extend(options_to_cli_args(remove_options))
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cmd.extend(['-f', vg_name])
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return call(cmd)
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def vg_lv_create(vg_name, create_options, name, size_bytes, pv_dests):
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cmd = ['lvcreate']
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cmd.extend(options_to_cli_args(create_options))
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cmd.extend(['--size', str(size_bytes) + 'B'])
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cmd.extend(['--name', name, vg_name, '--yes'])
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pv_dest_ranges(cmd, pv_dests)
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return call(cmd)
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def vg_lv_snapshot(vg_name, snapshot_options, name, size_bytes):
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cmd = ['lvcreate']
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cmd.extend(options_to_cli_args(snapshot_options))
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cmd.extend(["-s"])
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if size_bytes != 0:
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cmd.extend(['--size', str(size_bytes) + 'B'])
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cmd.extend(['--name', name, vg_name])
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return call(cmd)
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def _vg_lv_create_common_cmd(create_options, size_bytes, thin_pool):
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cmd = ['lvcreate']
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cmd.extend(options_to_cli_args(create_options))
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if not thin_pool:
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cmd.extend(['--size', str(size_bytes) + 'B'])
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else:
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cmd.extend(['--thin', '--size', str(size_bytes) + 'B'])
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cmd.extend(['--yes'])
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return cmd
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def vg_lv_create_linear(vg_name, create_options, name, size_bytes, thin_pool):
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cmd = _vg_lv_create_common_cmd(create_options, size_bytes, thin_pool)
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cmd.extend(['--name', name, vg_name])
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return call(cmd)
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def vg_lv_create_striped(vg_name, create_options, name, size_bytes,
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num_stripes, stripe_size_kb, thin_pool):
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cmd = _vg_lv_create_common_cmd(create_options, size_bytes, thin_pool)
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cmd.extend(['--stripes', str(num_stripes)])
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if stripe_size_kb != 0:
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cmd.extend(['--stripesize', str(stripe_size_kb)])
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cmd.extend(['--name', name, vg_name])
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return call(cmd)
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def _vg_lv_create_raid(vg_name, create_options, name, raid_type, size_bytes,
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num_stripes, stripe_size_kb):
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cmd = ['lvcreate']
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cmd.extend(options_to_cli_args(create_options))
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cmd.extend(['--type', raid_type])
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cmd.extend(['--size', str(size_bytes) + 'B'])
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if num_stripes != 0:
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cmd.extend(['--stripes', str(num_stripes)])
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if stripe_size_kb != 0:
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cmd.extend(['--stripesize', str(stripe_size_kb)])
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cmd.extend(['--name', name, vg_name, '--yes'])
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return call(cmd)
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def vg_lv_create_raid(vg_name, create_options, name, raid_type, size_bytes,
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num_stripes, stripe_size_kb):
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cmd = ['lvcreate']
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cmd.extend(options_to_cli_args(create_options))
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return _vg_lv_create_raid(vg_name, create_options, name, raid_type,
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size_bytes, num_stripes, stripe_size_kb)
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def vg_lv_create_mirror(
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vg_name, create_options, name, size_bytes, num_copies):
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cmd = ['lvcreate']
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cmd.extend(options_to_cli_args(create_options))
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cmd.extend(['--type', 'mirror'])
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cmd.extend(['--mirrors', str(num_copies)])
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cmd.extend(['--size', str(size_bytes) + 'B'])
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cmd.extend(['--name', name, vg_name, '--yes'])
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return call(cmd)
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def vg_create_cache_pool(md_full_name, data_full_name, create_options):
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cmd = ['lvconvert']
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cmd.extend(options_to_cli_args(create_options))
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cmd.extend(['--type', 'cache-pool', '--force', '-y',
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'--poolmetadata', md_full_name, data_full_name])
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return call(cmd)
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def vg_create_thin_pool(md_full_name, data_full_name, create_options):
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cmd = ['lvconvert']
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cmd.extend(options_to_cli_args(create_options))
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cmd.extend(['--type', 'thin-pool', '--force', '-y',
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'--poolmetadata', md_full_name, data_full_name])
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return call(cmd)
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def lv_remove(lv_path, remove_options):
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cmd = ['lvremove']
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cmd.extend(options_to_cli_args(remove_options))
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cmd.extend(['-f', lv_path])
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return call(cmd)
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def lv_rename(lv_path, new_name, rename_options):
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cmd = ['lvrename']
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cmd.extend(options_to_cli_args(rename_options))
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cmd.extend([lv_path, new_name])
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return call(cmd)
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def lv_resize(lv_full_name, size_change, pv_dests,
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resize_options):
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cmd = ['lvresize', '--force']
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cmd.extend(options_to_cli_args(resize_options))
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if size_change < 0:
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cmd.append("-L-%dB" % (-size_change))
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else:
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cmd.append("-L+%dB" % (size_change))
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cmd.append(lv_full_name)
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pv_dest_ranges(cmd, pv_dests)
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return call(cmd)
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def lv_lv_create(lv_full_name, create_options, name, size_bytes):
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cmd = ['lvcreate']
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cmd.extend(options_to_cli_args(create_options))
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cmd.extend(['--virtualsize', str(size_bytes) + 'B', '-T'])
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cmd.extend(['--name', name, lv_full_name, '--yes'])
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return call(cmd)
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def lv_cache_lv(cache_pool_full_name, lv_full_name, cache_options):
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# lvconvert --type cache --cachepool VG/CachePoolLV VG/OriginLV
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cmd = ['lvconvert']
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cmd.extend(options_to_cli_args(cache_options))
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cmd.extend(['-y', '--type', 'cache', '--cachepool',
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cache_pool_full_name, lv_full_name])
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return call(cmd)
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def lv_detach_cache(lv_full_name, detach_options, destroy_cache):
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cmd = ['lvconvert']
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if destroy_cache:
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option = '--uncache'
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else:
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# Currently fairly dangerous
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# see: https://bugzilla.redhat.com/show_bug.cgi?id=1248972
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option = '--splitcache'
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cmd.extend(options_to_cli_args(detach_options))
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# needed to prevent interactive questions
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cmd.extend(["--yes", "--force"])
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cmd.extend([option, lv_full_name])
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return call(cmd)
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def supports_json():
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cmd = ['help']
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rc, out, err = call(cmd)
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if rc == 0:
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if cfg.SHELL_IN_USE:
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return True
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else:
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if 'fullreport' in err:
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return True
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return False
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def lvm_full_report_json():
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pv_columns = ['pv_name', 'pv_uuid', 'pv_fmt', 'pv_size', 'pv_free',
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'pv_used', 'dev_size', 'pv_mda_size', 'pv_mda_free',
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'pv_ba_start', 'pv_ba_size', 'pe_start', 'pv_pe_count',
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'pv_pe_alloc_count', 'pv_attr', 'pv_tags', 'vg_name',
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'vg_uuid', 'pv_missing']
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pv_seg_columns = ['pvseg_start', 'pvseg_size', 'segtype',
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'pv_uuid', 'lv_uuid', 'pv_name']
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vg_columns = ['vg_name', 'vg_uuid', 'vg_fmt', 'vg_size', 'vg_free',
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'vg_sysid', 'vg_extent_size', 'vg_extent_count',
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'vg_free_count', 'vg_profile', 'max_lv', 'max_pv',
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'pv_count', 'lv_count', 'snap_count', 'vg_seqno',
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'vg_mda_count', 'vg_mda_free', 'vg_mda_size',
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'vg_mda_used_count', 'vg_attr', 'vg_tags']
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lv_columns = ['lv_uuid', 'lv_name', 'lv_path', 'lv_size',
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'vg_name', 'pool_lv_uuid', 'pool_lv', 'origin_uuid',
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'origin', 'data_percent',
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'lv_attr', 'lv_tags', 'vg_uuid', 'lv_active', 'data_lv',
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'metadata_lv', 'lv_parent', 'lv_role', 'lv_layout',
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'snap_percent', 'metadata_percent', 'copy_percent',
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'sync_percent', 'lv_metadata_size', 'move_pv', 'move_pv_uuid']
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lv_seg_columns = ['seg_pe_ranges', 'segtype', 'lv_uuid']
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cmd = _dc('fullreport', [
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'-a', # Need hidden too
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'--configreport', 'pv', '-o', ','.join(pv_columns),
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'--configreport', 'vg', '-o', ','.join(vg_columns),
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'--configreport', 'lv', '-o', ','.join(lv_columns),
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'--configreport', 'seg', '-o', ','.join(lv_seg_columns),
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'--configreport', 'pvseg', '-o', ','.join(pv_seg_columns),
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'--reportformat', 'json'
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])
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rc, out, err = call(cmd)
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if rc == 0:
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# With the current implementation, if we are using the shell then we
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# are using JSON and JSON is returned back to us as it was parsed to
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# figure out if we completed OK or not
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if cfg.SHELL_IN_USE:
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assert(type(out) == dict)
|
|
return out
|
|
else:
|
|
return json.loads(out)
|
|
return None
|
|
|
|
|
|
def pv_retrieve_with_segs(device=None):
|
|
d = []
|
|
err = ""
|
|
out = ""
|
|
rc = 0
|
|
|
|
columns = ['pv_name', 'pv_uuid', 'pv_fmt', 'pv_size', 'pv_free',
|
|
'pv_used', 'dev_size', 'pv_mda_size', 'pv_mda_free',
|
|
'pv_ba_start', 'pv_ba_size', 'pe_start', 'pv_pe_count',
|
|
'pv_pe_alloc_count', 'pv_attr', 'pv_tags', 'vg_name',
|
|
'vg_uuid', 'pvseg_start', 'pvseg_size', 'segtype', 'pv_missing']
|
|
|
|
# Lvm has some issues where it returns failure when querying pvs when other
|
|
# operations are in process, see:
|
|
# https://bugzilla.redhat.com/show_bug.cgi?id=1274085
|
|
for i in range(0, 10):
|
|
cmd = _dc('pvs', ['-o', ','.join(columns)])
|
|
|
|
if device:
|
|
cmd.extend(device)
|
|
|
|
rc, out, err = call(cmd)
|
|
|
|
if rc == 0:
|
|
d = parse_column_names(out, columns)
|
|
break
|
|
else:
|
|
time.sleep(0.2)
|
|
log_debug("LVM Bug workaround, retrying pvs command...")
|
|
|
|
if rc != 0:
|
|
msg = "We were unable to get pvs to return without error after " \
|
|
"trying 10 times, RC=%d, STDERR=(%s), STDOUT=(%s)" % \
|
|
(rc, err, out)
|
|
log_error(msg)
|
|
raise RuntimeError(msg)
|
|
|
|
return d
|
|
|
|
|
|
def pv_resize(device, size_bytes, create_options):
|
|
cmd = ['pvresize']
|
|
|
|
cmd.extend(options_to_cli_args(create_options))
|
|
|
|
if size_bytes != 0:
|
|
cmd.extend(['--yes', '--setphysicalvolumesize', str(size_bytes) + 'B'])
|
|
|
|
cmd.extend([device])
|
|
return call(cmd)
|
|
|
|
|
|
def pv_create(create_options, devices):
|
|
cmd = ['pvcreate', '-ff']
|
|
cmd.extend(options_to_cli_args(create_options))
|
|
cmd.extend(devices)
|
|
return call(cmd)
|
|
|
|
|
|
def pv_allocatable(device, yes, allocation_options):
|
|
yn = 'n'
|
|
|
|
if yes:
|
|
yn = 'y'
|
|
|
|
cmd = ['pvchange']
|
|
cmd.extend(options_to_cli_args(allocation_options))
|
|
cmd.extend(['-x', yn, device])
|
|
return call(cmd)
|
|
|
|
|
|
def pv_scan(activate, cache, device_paths, major_minors, scan_options):
|
|
cmd = ['pvscan']
|
|
cmd.extend(options_to_cli_args(scan_options))
|
|
|
|
if activate:
|
|
cmd.extend(['--activate', "ay"])
|
|
|
|
if cache:
|
|
cmd.append('--cache')
|
|
|
|
if len(device_paths) > 0:
|
|
for d in device_paths:
|
|
cmd.append(d)
|
|
|
|
if len(major_minors) > 0:
|
|
for mm in major_minors:
|
|
cmd.append("%s:%s" % (mm))
|
|
|
|
return call(cmd)
|
|
|
|
|
|
def vg_create(create_options, pv_devices, name):
|
|
cmd = ['vgcreate']
|
|
cmd.extend(options_to_cli_args(create_options))
|
|
cmd.append(name)
|
|
cmd.extend(pv_devices)
|
|
return call(cmd)
|
|
|
|
|
|
def vg_change(change_options, name):
|
|
cmd = ['vgchange']
|
|
cmd.extend(options_to_cli_args(change_options))
|
|
cmd.append(name)
|
|
return call(cmd)
|
|
|
|
|
|
def vg_reduce(vg_name, missing, pv_devices, reduce_options):
|
|
cmd = ['vgreduce']
|
|
cmd.extend(options_to_cli_args(reduce_options))
|
|
|
|
if missing:
|
|
cmd.append('--removemissing')
|
|
elif len(pv_devices) == 0:
|
|
cmd.append('--all')
|
|
|
|
cmd.append(vg_name)
|
|
cmd.extend(pv_devices)
|
|
return call(cmd)
|
|
|
|
|
|
def vg_extend(vg_name, extend_devices, extend_options):
|
|
cmd = ['vgextend']
|
|
cmd.extend(options_to_cli_args(extend_options))
|
|
cmd.append(vg_name)
|
|
cmd.extend(extend_devices)
|
|
return call(cmd)
|
|
|
|
|
|
def _vg_value_set(name, arguments, options):
|
|
cmd = ['vgchange']
|
|
cmd.extend(options_to_cli_args(options))
|
|
cmd.append(name)
|
|
cmd.extend(arguments)
|
|
return call(cmd)
|
|
|
|
|
|
def vg_allocation_policy(vg_name, policy, policy_options):
|
|
return _vg_value_set(vg_name, ['--alloc', policy], policy_options)
|
|
|
|
|
|
def vg_max_pv(vg_name, number, max_options):
|
|
return _vg_value_set(vg_name, ['--maxphysicalvolumes', str(number)],
|
|
max_options)
|
|
|
|
|
|
def vg_max_lv(vg_name, number, max_options):
|
|
return _vg_value_set(vg_name, ['-l', str(number)], max_options)
|
|
|
|
|
|
def vg_uuid_gen(vg_name, ignore, options):
|
|
assert ignore is None
|
|
return _vg_value_set(vg_name, ['--uuid'], options)
|
|
|
|
|
|
def activate_deactivate(op, name, activate, control_flags, options):
|
|
cmd = [op]
|
|
cmd.extend(options_to_cli_args(options))
|
|
|
|
op = '-a'
|
|
|
|
if control_flags:
|
|
# Autoactivation
|
|
if (1 << 0) & control_flags:
|
|
op += 'a'
|
|
# Exclusive locking (Cluster)
|
|
if (1 << 1) & control_flags:
|
|
op += 'e'
|
|
|
|
# Local node activation
|
|
if (1 << 2) & control_flags:
|
|
op += 'l'
|
|
|
|
# Activation modes
|
|
if (1 << 3) & control_flags:
|
|
cmd.extend(['--activationmode', 'complete'])
|
|
elif (1 << 4) & control_flags:
|
|
cmd.extend(['--activationmode', 'partial'])
|
|
|
|
# Ignore activation skip
|
|
if (1 << 5) & control_flags:
|
|
cmd.append('--ignoreactivationskip')
|
|
|
|
if activate:
|
|
op += 'y'
|
|
else:
|
|
op += 'n'
|
|
|
|
cmd.append(op)
|
|
cmd.append(name)
|
|
return call(cmd)
|
|
|
|
|
|
def vg_retrieve(vg_specific):
|
|
if vg_specific:
|
|
assert isinstance(vg_specific, list)
|
|
|
|
columns = ['vg_name', 'vg_uuid', 'vg_fmt', 'vg_size', 'vg_free',
|
|
'vg_sysid', 'vg_extent_size', 'vg_extent_count',
|
|
'vg_free_count', 'vg_profile', 'max_lv', 'max_pv',
|
|
'pv_count', 'lv_count', 'snap_count', 'vg_seqno',
|
|
'vg_mda_count', 'vg_mda_free', 'vg_mda_size',
|
|
'vg_mda_used_count', 'vg_attr', 'vg_tags']
|
|
|
|
cmd = _dc('vgs', ['-o', ','.join(columns)])
|
|
|
|
if vg_specific:
|
|
cmd.extend(vg_specific)
|
|
|
|
d = []
|
|
rc, out, err = call(cmd)
|
|
if rc == 0:
|
|
d = parse_column_names(out, columns)
|
|
|
|
return d
|
|
|
|
|
|
def lv_retrieve_with_segments():
|
|
columns = ['lv_uuid', 'lv_name', 'lv_path', 'lv_size',
|
|
'vg_name', 'pool_lv_uuid', 'pool_lv', 'origin_uuid',
|
|
'origin', 'data_percent',
|
|
'lv_attr', 'lv_tags', 'vg_uuid', 'lv_active', 'data_lv',
|
|
'metadata_lv', 'seg_pe_ranges', 'segtype', 'lv_parent',
|
|
'lv_role', 'lv_layout',
|
|
'snap_percent', 'metadata_percent', 'copy_percent',
|
|
'sync_percent', 'lv_metadata_size', 'move_pv', 'move_pv_uuid']
|
|
|
|
cmd = _dc('lvs', ['-a', '-o', ','.join(columns)])
|
|
rc, out, err = call(cmd)
|
|
|
|
d = []
|
|
|
|
if rc == 0:
|
|
d = parse_column_names(out, columns)
|
|
|
|
return d
|
|
|
|
|
|
if __name__ == '__main__':
|
|
pv_data = pv_retrieve_with_segs()
|
|
|
|
for p in pv_data:
|
|
print(str(p))
|