/usr/lib/python2.7/dist-packages/koji/daemon.py is in koji-common 1.10.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (c) 2010-2014 Red Hat, Inc.
#
# Koji is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation;
# version 2.1 of the License.
#
# This software is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this software; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
# Authors:
# Mike McLean <mikem@redhat.com>
# Mike Bonnet <mikeb@redhat.com>
import koji
import koji.tasks
from koji.tasks import safe_rmtree
from koji.util import md5_constructor, adler32_constructor, parseStatus
import os
import signal
import logging
import urlparse
from fnmatch import fnmatch
import base64
import time
import sys
import traceback
import errno
import xmlrpclib
def incremental_upload(session, fname, fd, path, retries=5, logger=None):
if not fd:
return
if logger is None:
logger = logging.getLogger('koji.daemon')
if session.opts.get('use_fast_upload'):
fast_incremental_upload(session, fname, fd, path, retries, logger)
return
while True:
offset = fd.tell()
contents = fd.read(65536)
size = len(contents)
if size == 0:
break
data = base64.encodestring(contents)
digest = md5_constructor(contents).hexdigest()
del contents
tries = 0
while True:
if session.uploadFile(path, fname, koji.encode_int(size), digest, koji.encode_int(offset), data):
break
if tries <= retries:
tries += 1
time.sleep(10)
continue
else:
logger.error("Error uploading file %s to %s at offset %d" % (fname, path, offset))
break
def fast_incremental_upload(session, fname, fd, path, retries, logger):
"""Like incremental_upload, but use the fast upload mechanism"""
while True:
offset = fd.tell()
contents = fd.read(65536)
if not contents:
break
hexdigest = adler32_constructor(contents).hexdigest()
tries = 0
while True:
result = session.rawUpload(contents, offset, path, fname, overwrite=True)
if result['hexdigest'] == hexdigest:
break
if tries <= retries:
tries += 1
time.sleep(10)
continue
else:
logger.error("Error uploading file %s to %s at offset %d" % (fname, path, offset))
break
def log_output(session, path, args, outfile, uploadpath, cwd=None, logerror=0, append=0, chroot=None, env=None):
"""Run command with output redirected. If chroot is not None, chroot to the directory specified
before running the command."""
pid = os.fork()
fd = None
if not pid:
session._forget()
try:
if chroot:
os.chroot(chroot)
if cwd:
os.chdir(cwd)
flags = os.O_CREAT | os.O_WRONLY
if append:
flags |= os.O_APPEND
fd = os.open(outfile, flags, 0666)
os.dup2(fd, 1)
if logerror:
os.dup2(fd, 2)
# echo the command we're running into the logfile
os.write(fd, '$ %s\n' % ' '.join(args))
environ = os.environ.copy()
if env:
environ.update(env)
os.execvpe(path, args, environ)
except:
msg = ''.join(traceback.format_exception(*sys.exc_info()))
if fd:
try:
os.write(fd, msg)
os.close(fd)
except:
pass
print msg
os._exit(1)
else:
if chroot:
outfile = os.path.normpath(chroot + outfile)
outfd = None
remotename = os.path.basename(outfile)
while True:
status = os.waitpid(pid, os.WNOHANG)
time.sleep(1)
if not outfd:
try:
outfd = file(outfile, 'r')
except IOError:
# will happen if the forked process has not created the logfile yet
continue
except:
print 'Error reading log file: %s' % outfile
print ''.join(traceback.format_exception(*sys.exc_info()))
incremental_upload(session, remotename, outfd, uploadpath)
if status[0] != 0:
if outfd:
outfd.close()
return status[1]
## BEGIN kojikamid dup
class SCM(object):
"SCM abstraction class"
types = { 'CVS': ('cvs://',),
'CVS+SSH': ('cvs+ssh://',),
'GIT': ('git://', 'git+http://', 'git+https://', 'git+rsync://'),
'GIT+SSH': ('git+ssh://',),
'SVN': ('svn://', 'svn+http://', 'svn+https://'),
'SVN+SSH': ('svn+ssh://',) }
def is_scm_url(url):
"""
Return True if the url appears to be a valid, accessible source location, False otherwise
"""
for schemes in SCM.types.values():
for scheme in schemes:
if url.startswith(scheme):
return True
else:
return False
is_scm_url = staticmethod(is_scm_url)
def __init__(self, url):
"""
Initialize the SCM object using the specified url.
The expected url format is:
scheme://[user@]host/path/to/repo?path/to/module#revision_or_tag_identifier
The initialized SCM object will have the following attributes:
- url (the unmodified url)
- scheme
- user (may be null)
- host
- repository
- module
- revision
- use_common (defaults to True, may be set by assert_allowed())
- source_cmd (defaults to ['make', 'sources'], may be set by assert_allowed())
- scmtype
The exact format of each attribute is SCM-specific, but the structure of the url
must conform to the template above, or an error will be raised.
"""
self.logger = logging.getLogger('koji.build.SCM')
if not SCM.is_scm_url(url):
raise koji.GenericError, 'Invalid SCM URL: %s' % url
self.url = url
scheme, user, host, path, query, fragment = self._parse_url()
self.scheme = scheme
self.user = user
self.host = host
self.repository = path
self.module = query
self.revision = fragment
self.use_common = True
self.source_cmd = ['make', 'sources']
for scmtype, schemes in SCM.types.items():
if self.scheme in schemes:
self.scmtype = scmtype
break
else:
# should never happen
raise koji.GenericError, 'Invalid SCM URL: %s' % url
def _parse_url(self):
"""
Parse the SCM url into usable components.
Return the following tuple:
(scheme, user, host, path, query, fragment)
user may be None, everything else will have a value
"""
# get the url's scheme
scheme = self.url.split('://')[0] + '://'
# replace the scheme with http:// so that the urlparse works in all cases
dummyurl = self.url.replace(scheme, 'http://', 1)
dummyscheme, netloc, path, params, query, fragment = urlparse.urlparse(dummyurl)
user = None
userhost = netloc.split('@')
if len(userhost) == 2:
user = userhost[0]
if not user:
# Don't return an empty string
user = None
elif ':' in user:
raise koji.GenericError, 'username:password format not supported: %s' % user
netloc = userhost[1]
elif len(userhost) > 2:
raise koji.GenericError, 'Invalid username@hostname specified: %s' % netloc
# ensure that path and query do not end in /
if path.endswith('/'):
path = path[:-1]
if query.endswith('/'):
query = query[:-1]
# check for validity: params should be empty, query may be empty, everything else should be populated
if params :
raise koji.GenericError, 'Unable to parse SCM URL: %s . Params element %s should be empty.' % (self.url, params)
if not scheme :
raise koji.GenericError, 'Unable to parse SCM URL: %s . Could not find the scheme element.' % self.url
if not netloc :
raise koji.GenericError, 'Unable to parse SCM URL: %s . Could not find the netloc element.' % self.url
if not path :
raise koji.GenericError, 'Unable to parse SCM URL: %s . Could not find the path element.' % self.url
if not fragment :
raise koji.GenericError, 'Unable to parse SCM URL: %s . Could not find the fragment element.' % self.url
# return parsed values
return (scheme, user, netloc, path, query, fragment)
def assert_allowed(self, allowed):
"""
Verify that the host and repository of this SCM is in the provided list of
allowed repositories.
allowed is a space-separated list of host:repository[:use_common[:source_cmd]] tuples. Incorrectly-formatted
tuples will be ignored.
If use_common is not present, kojid will attempt to checkout a common/ directory from the
repository. If use_common is set to no, off, false, or 0, it will not attempt to checkout a common/
directory.
source_cmd is a shell command (args separated with commas instead of spaces) to run before building the srpm.
It is generally used to retrieve source files from a remote location. If no source_cmd is specified,
"make sources" is run by default.
"""
for allowed_scm in allowed.split():
scm_tuple = allowed_scm.split(':')
if len(scm_tuple) >= 2:
if fnmatch(self.host, scm_tuple[0]) and fnmatch(self.repository, scm_tuple[1]):
# SCM host:repository is in the allowed list
# check if we specify a value for use_common
if len(scm_tuple) >= 3:
if scm_tuple[2].lower() in ('no', 'off', 'false', '0'):
self.use_common = False
# check if we specify a custom source_cmd
if len(scm_tuple) >= 4:
if scm_tuple[3]:
self.source_cmd = scm_tuple[3].split(',')
else:
# there was nothing after the trailing :, so they don't want to run a source_cmd at all
self.source_cmd = None
break
else:
self.logger.warn('Ignoring incorrectly formatted SCM host:repository: %s' % allowed_scm)
else:
raise koji.BuildError, '%s:%s is not in the list of allowed SCMs' % (self.host, self.repository)
def checkout(self, scmdir, session=None, uploadpath=None, logfile=None):
"""
Checkout the module from SCM. Accepts the following parameters:
- scmdir: the working directory
- session: a ClientSession object
- uploadpath: the path on the server the logfile should be uploaded to
- logfile: the file used for logging command output
session, uploadpath, and logfile are not used when run within kojikamid,
but are otherwise required.
Returns the directory that the module was checked-out into (a subdirectory of scmdir)
"""
# TODO: sanity check arguments
sourcedir = '%s/%s' % (scmdir, self.module)
update_checkout_cmd = None
update_checkout_dir = None
env = None
def _run(cmd, chdir=None, fatal=False, log=True, _count=[0]):
if globals().get('KOJIKAMID'):
#we've been inserted into kojikamid, use its run()
return run(cmd, chdir=chdir, fatal=fatal, log=log)
else:
append = (_count[0] > 0)
_count[0] += 1
if log_output(session, cmd[0], cmd, logfile, uploadpath,
cwd=chdir, logerror=1, append=append, env=env):
raise koji.BuildError, 'Error running %s command "%s", see %s for details' % \
(self.scmtype, ' '.join(cmd), os.path.basename(logfile))
if self.scmtype == 'CVS':
pserver = ':pserver:%s@%s:%s' % ((self.user or 'anonymous'), self.host, self.repository)
module_checkout_cmd = ['cvs', '-d', pserver, 'checkout', '-r', self.revision, self.module]
common_checkout_cmd = ['cvs', '-d', pserver, 'checkout', 'common']
elif self.scmtype == 'CVS+SSH':
if not self.user:
raise koji.BuildError, 'No user specified for repository access scheme: %s' % self.scheme
cvsserver = ':ext:%s@%s:%s' % (self.user, self.host, self.repository)
module_checkout_cmd = ['cvs', '-d', cvsserver, 'checkout', '-r', self.revision, self.module]
common_checkout_cmd = ['cvs', '-d', cvsserver, 'checkout', 'common']
env = {'CVS_RSH': 'ssh'}
elif self.scmtype == 'GIT':
scheme = self.scheme
if '+' in scheme:
scheme = scheme.split('+')[1]
gitrepo = '%s%s%s' % (scheme, self.host, self.repository)
commonrepo = os.path.dirname(gitrepo) + '/common'
checkout_path = os.path.basename(self.repository)
if self.repository.endswith('/.git'):
# If we're referring to the .git subdirectory of the main module,
# assume we need to do the same for the common module
checkout_path = os.path.basename(self.repository[:-5])
commonrepo = os.path.dirname(gitrepo[:-5]) + '/common/.git'
elif self.repository.endswith('.git'):
# If we're referring to a bare repository for the main module,
# assume we need to do the same for the common module
checkout_path = os.path.basename(self.repository[:-4])
commonrepo = os.path.dirname(gitrepo[:-4]) + '/common.git'
sourcedir = '%s/%s' % (scmdir, checkout_path)
module_checkout_cmd = ['git', 'clone', '-n', gitrepo, sourcedir]
common_checkout_cmd = ['git', 'clone', commonrepo, 'common']
update_checkout_cmd = ['git', 'reset', '--hard', self.revision]
update_checkout_dir = sourcedir
# self.module may be empty, in which case the specfile should be in the top-level directory
if self.module:
# Treat the module as a directory inside the git repository
sourcedir = '%s/%s' % (sourcedir, self.module)
elif self.scmtype == 'GIT+SSH':
if not self.user:
raise koji.BuildError, 'No user specified for repository access scheme: %s' % self.scheme
gitrepo = 'git+ssh://%s@%s%s' % (self.user, self.host, self.repository)
commonrepo = os.path.dirname(gitrepo) + '/common'
checkout_path = os.path.basename(self.repository)
if self.repository.endswith('/.git'):
# If we're referring to the .git subdirectory of the main module,
# assume we need to do the same for the common module
checkout_path = os.path.basename(self.repository[:-5])
commonrepo = os.path.dirname(gitrepo[:-5]) + '/common/.git'
elif self.repository.endswith('.git'):
# If we're referring to a bare repository for the main module,
# assume we need to do the same for the common module
checkout_path = os.path.basename(self.repository[:-4])
commonrepo = os.path.dirname(gitrepo[:-4]) + '/common.git'
sourcedir = '%s/%s' % (scmdir, checkout_path)
module_checkout_cmd = ['git', 'clone', '-n', gitrepo, sourcedir]
common_checkout_cmd = ['git', 'clone', commonrepo, 'common']
update_checkout_cmd = ['git', 'reset', '--hard', self.revision]
update_checkout_dir = sourcedir
# self.module may be empty, in which case the specfile should be in the top-level directory
if self.module:
# Treat the module as a directory inside the git repository
sourcedir = '%s/%s' % (sourcedir, self.module)
elif self.scmtype == 'SVN':
scheme = self.scheme
if '+' in scheme:
scheme = scheme.split('+')[1]
svnserver = '%s%s%s' % (scheme, self.host, self.repository)
module_checkout_cmd = ['svn', 'checkout', '-r', self.revision, '%s/%s' % (svnserver, self.module), self.module]
common_checkout_cmd = ['svn', 'checkout', '%s/common' % svnserver]
elif self.scmtype == 'SVN+SSH':
if not self.user:
raise koji.BuildError, 'No user specified for repository access scheme: %s' % self.scheme
svnserver = 'svn+ssh://%s@%s%s' % (self.user, self.host, self.repository)
module_checkout_cmd = ['svn', 'checkout', '-r', self.revision, '%s/%s' % (svnserver, self.module), self.module]
common_checkout_cmd = ['svn', 'checkout', '%s/common' % svnserver]
else:
raise koji.BuildError, 'Unknown SCM type: %s' % self.scmtype
# perform checkouts
_run(module_checkout_cmd, chdir=scmdir, fatal=True)
if update_checkout_cmd:
# Currently only required for GIT checkouts
# Run the command in the directory the source was checked out into
if self.scmtype.startswith('GIT') and globals().get('KOJIKAMID'):
_run(['git', 'config', 'core.autocrlf', 'true'], chdir=update_checkout_dir, fatal=True)
_run(['git', 'config', 'core.safecrlf', 'true'], chdir=update_checkout_dir, fatal=True)
_run(update_checkout_cmd, chdir=update_checkout_dir, fatal=True)
if self.use_common and not globals().get('KOJIKAMID'):
_run(common_checkout_cmd, chdir=scmdir, fatal=True)
if not os.path.exists('%s/../common' % sourcedir):
# find the relative distance from sourcedir/../common to scmdir/common
destdir = os.path.split(sourcedir)[0]
path_comps = destdir[len(scmdir) + 1:]
rel_path = '../' * len(path_comps.split('/'))
os.symlink(rel_path + 'common', '%s/../common' % sourcedir)
return sourcedir
## END kojikamid dup
class TaskManager(object):
def __init__(self, options, session):
self.options = options
self.session = session
self.tasks = {}
self.pids = {}
self.subsessions = {}
self.handlers = {}
self.status = ''
self.restart_pending = False
self.ready = False
self.hostdata = {}
self.task_load = 0.0
self.host_id = self.session.host.getID()
self.start_time = self.session.getSessionInfo()['start_time']
self.logger = logging.getLogger("koji.TaskManager")
def findHandlers(self, vars):
"""Find and index task handlers"""
for v in vars.values():
if type(v) == type(koji.tasks.BaseTaskHandler) and issubclass(v,koji.tasks.BaseTaskHandler):
for method in v.Methods:
self.handlers[method] = v
def scanPlugin(self, plugin):
"""Find task handlers in a plugin"""
self.findHandlers(vars(plugin))
def shutdown(self):
"""Attempt to shut down cleanly"""
for task_id in self.pids.keys():
self.cleanupTask(task_id)
self.session.host.freeTasks(self.tasks.keys())
self.session.host.updateHost(task_load=0.0,ready=False)
def updateBuildroots(self, nolocal=False):
"""Handle buildroot cleanup/maintenance
- examine current buildroots on system
- compare with db
- clean up as needed
- /var/lib/mock
- /etc/mock/koji
If nolocal is True, do not try to scan local buildroots.
"""
#query buildroots in db that are not expired
states = [ koji.BR_STATES[x] for x in ('INIT','WAITING','BUILDING') ]
db_br = self.session.listBuildroots(hostID=self.host_id,state=tuple(states))
# index by id
db_br = dict([(row['id'],row) for row in db_br])
st_expired = koji.BR_STATES['EXPIRED']
for id, br in db_br.items():
task_id = br['task_id']
if task_id is None:
# not associated with a task
# this makes no sense now, but may in the future
self.logger.warn("Expiring taskless buildroot: %(id)i/%(tag_name)s/%(arch)s" % br)
self.session.host.setBuildRootState(id,st_expired)
elif not self.tasks.has_key(task_id):
#task not running - expire the buildroot
#TODO - consider recycling hooks here (with strong sanity checks)
self.logger.info("Expiring buildroot: %(id)i/%(tag_name)s/%(arch)s" % br)
self.logger.debug("Buildroot task: %r, Current tasks: %r" % (task_id,self.tasks.keys()))
self.session.host.setBuildRootState(id,st_expired)
continue
if nolocal:
return
local_br = self._scanLocalBuildroots()
# get info on local_only buildroots (most likely expired)
local_only = [id for id in local_br.iterkeys() if not db_br.has_key(id)]
if local_only:
missed_br = self.session.listBuildroots(buildrootID=tuple(local_only))
#get all the task info in one call
tasks = []
for br in missed_br:
task_id = br['task_id']
if task_id:
tasks.append(task_id)
#index
missed_br = dict([(row['id'],row) for row in missed_br])
tasks = dict([(row['id'],row) for row in self.session.getTaskInfo(tasks)])
for id in local_only:
# Cleaning options
# - wait til later
# - "soft" clean (leaving empty root/ dir)
# - full removal
data = local_br[id]
br = missed_br.get(id)
if not br:
self.logger.warn("%(name)s: not in db" % data)
continue
desc = "%(id)i/%(tag_name)s/%(arch)s" % br
if not br['retire_ts']:
self.logger.warn("%s: no retire timestamp" % desc)
continue
age = time.time() - br['retire_ts']
self.logger.debug("Expired/stray buildroot: %s" % desc)
if br and br['task_id']:
task = tasks.get(br['task_id'])
if not task:
self.logger.warn("%s: invalid task %s" % (desc, br['task_id']))
continue
if (task['state'] == koji.TASK_STATES['FAILED'] and age < self.options.failed_buildroot_lifetime):
#XXX - this could be smarter
# keep buildroots for failed tasks around for a little while
self.logger.debug("Keeping failed buildroot: %s" % desc)
continue
topdir = data['dir']
rootdir = None
if topdir:
rootdir = "%s/root" % topdir
try:
st = os.lstat(rootdir)
except OSError, e:
if e.errno == errno.ENOENT:
rootdir = None
else:
self.logger.warn("%s: %s" % (desc, e))
continue
else:
age = min(age, time.time() - st.st_mtime)
#note: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=192153)
#If rpmlib is installing in this chroot, removing it entirely
#can lead to a world of hurt.
#We remove the rootdir contents but leave the rootdir unless it
#is really old
if age > 3600*24:
#dir untouched for a day
self.logger.info("Removing buildroot: %s" % desc)
if topdir and safe_rmtree(topdir, unmount=True, strict=False) != 0:
continue
#also remove the config
try:
os.unlink(data['cfg'])
except OSError, e:
self.logger.warn("%s: can't remove config: %s" % (desc, e))
elif age > 120:
if rootdir:
try:
flist = os.listdir(rootdir)
except OSError, e:
self.logger.warn("%s: can't list rootdir: %s" % (desc, e))
continue
if flist:
self.logger.info("%s: clearing rootdir" % desc)
for fn in flist:
safe_rmtree("%s/%s" % (rootdir,fn), unmount=True, strict=False)
resultdir = "%s/result" % topdir
if os.path.isdir(resultdir):
self.logger.info("%s: clearing resultdir" % desc)
safe_rmtree(resultdir, unmount=True, strict=False)
else:
self.logger.debug("Recent buildroot: %s: %i seconds" % (desc,age))
self.logger.debug("Local buildroots: %d" % len(local_br))
self.logger.debug("Active buildroots: %d" % len(db_br))
self.logger.debug("Expired/stray buildroots: %d" % len(local_only))
def _scanLocalBuildroots(self):
#XXX
configdir = '/etc/mock/koji'
buildroots = {}
for f in os.listdir(configdir):
if not f.endswith('.cfg'):
continue
fn = "%s/%s" % (configdir,f)
if not os.path.isfile(fn):
continue
fo = file(fn,'r')
id = None
name = None
for n in xrange(10):
# data should be in first few lines
line = fo.readline()
if line.startswith('# Koji buildroot id:'):
try:
id = int(line.split(':')[1])
except (ValueError, IndexError):
continue
if line.startswith('# Koji buildroot name:'):
try:
name = line.split(':')[1].strip()
except (ValueError, IndexError):
continue
if id is None or name is None:
continue
# see if there's a dir for the buildroot
vardir = os.path.join(self.options.mockdir, name)
buildroots[id] = {}
buildroots[id]['name'] = name
buildroots[id]['cfg'] = fn
buildroots[id]['dir'] = None
if os.path.isdir(vardir):
buildroots[id]['dir'] = vardir
return buildroots
def updateTasks(self):
"""Read and process task statuses from server
The processing we do is:
1) clean up after tasks that are not longer active:
* kill off processes
* retire buildroots
* remove buildroots
- with some possible exceptions
2) wake waiting tasks if appropriate
"""
tasks = {}
stale = []
task_load = 0.0
if self.pids:
self.logger.info("pids: %r" % self.pids)
for task in self.session.host.getHostTasks():
self.logger.info("open task: %r" % task)
# the tasks returned are those that are open and locked
# by this host.
id = task['id']
if not self.pids.has_key(id):
#We don't have a process for this
#Expected to happen after a restart, otherwise this is an error
stale.append(id)
continue
tasks[id] = task
if task.get('alert',False):
#wake up the process
self.logger.info("Waking up task: %r" % task)
os.kill(self.pids[id],signal.SIGUSR2)
if not task['waiting']:
task_load += task['weight']
self.logger.debug("Task Load: %s" % task_load)
self.task_load = task_load
self.tasks = tasks
self.logger.debug("Current tasks: %r" % self.tasks)
if len(stale) > 0:
#A stale task is one which is opened to us, but we know nothing
#about). This will happen after a daemon restart, for example.
self.logger.info("freeing stale tasks: %r" % stale)
self.session.host.freeTasks(stale)
for id, pid in self.pids.items():
if self._waitTask(id, pid):
# the subprocess handles most everything, we just need to clear things out
if self.cleanupTask(id, wait=False):
del self.pids[id]
if self.tasks.has_key(id):
del self.tasks[id]
for id, pid in self.pids.items():
if not tasks.has_key(id):
# expected to happen when:
# - we are in the narrow gap between the time the task
# records its result and the time the process actually
# exits.
# - task is canceled
# - task is forcibly reassigned/unassigned
tinfo = self.session.getTaskInfo(id)
if tinfo is None:
raise koji.GenericError, "Invalid task %r (pid %r)" % (id,pid)
elif tinfo['state'] == koji.TASK_STATES['CANCELED']:
self.logger.info("Killing canceled task %r (pid %r)" % (id,pid))
if self.cleanupTask(id):
del self.pids[id]
elif tinfo['host_id'] != self.host_id:
self.logger.info("Killing reassigned task %r (pid %r)" % (id,pid))
if self.cleanupTask(id):
del self.pids[id]
else:
self.logger.info("Lingering task %r (pid %r)" % (id,pid))
def getNextTask(self):
self.ready = self.readyForTask()
self.session.host.updateHost(self.task_load,self.ready)
if not self.ready:
self.logger.info("Not ready for task")
return False
hosts, tasks = self.session.host.getLoadData()
self.logger.debug("Load Data:")
self.logger.debug(" hosts: %r" % hosts)
self.logger.debug(" tasks: %r" % tasks)
#now we organize this data into channel-arch bins
bin_hosts = {} #hosts indexed by bin
bins = {} #bins for this host
our_avail = None
for host in hosts:
host['bins'] = []
if host['id'] == self.host_id:
#note: task_load reported by server might differ from what we
#sent due to precision variation
our_avail = host['capacity'] - host['task_load']
for chan in host['channels']:
for arch in host['arches'].split() + ['noarch']:
bin = "%s:%s" % (chan,arch)
bin_hosts.setdefault(bin,[]).append(host)
if host['id'] == self.host_id:
bins[bin] = 1
self.logger.debug("bins: %r" % bins)
if our_avail is None:
self.logger.info("Server did not report this host. Are we disabled?")
return False
elif not bins:
self.logger.info("No bins for this host. Missing channel/arch config?")
return False
#sort available capacities for each of our bins
avail = {}
for bin in bins.iterkeys():
avail[bin] = [host['capacity'] - host['task_load'] for host in bin_hosts[bin]]
avail[bin].sort()
avail[bin].reverse()
for task in tasks:
# note: tasks are in priority order
self.logger.debug("task: %r" % task)
if task['method'] not in self.handlers:
self.logger.warn("Skipping task %(id)i, no handler for method %(method)s", task)
continue
if self.tasks.has_key(task['id']):
# we were running this task, but it apparently has been
# freed or reassigned. We can't do anything with it until
# updateTasks notices this and cleans up.
self.logger.debug("Task %(id)s freed or reassigned", task)
continue
if task['state'] == koji.TASK_STATES['ASSIGNED']:
self.logger.debug("task is assigned")
if self.host_id == task['host_id']:
#assigned to us, we can take it regardless
if self.takeTask(task):
return True
elif task['state'] == koji.TASK_STATES['FREE']:
bin = "%(channel_id)s:%(arch)s" % task
self.logger.debug("task is free, bin=%r" % bin)
if not bins.has_key(bin):
continue
#see where our available capacity is compared to other hosts for this bin
#(note: the hosts in this bin are exactly those that could
#accept this task)
bin_avail = avail.get(bin, [0])
self.logger.debug("available capacities for bin: %r" % bin_avail)
median = bin_avail[(len(bin_avail)-1)/2]
self.logger.debug("ours: %.2f, median: %.2f" % (our_avail, median))
if not self.checkRelAvail(bin_avail, our_avail):
#decline for now and give the upper half a chance
return False
#otherwise, we attempt to open the task
if self.takeTask(task):
return True
else:
#should not happen
raise Exception, "Invalid task state reported by server"
return False
def checkRelAvail(self, bin_avail, avail):
"""
Check our available capacity against the capacity of other hosts in this bin.
Return True if we should take a task, False otherwise.
"""
median = bin_avail[(len(bin_avail)-1)/2]
self.logger.debug("ours: %.2f, median: %.2f" % (avail, median))
if avail >= median:
return True
else:
self.logger.debug("Skipping - available capacity in lower half")
return False
def _waitTask(self, task_id, pid=None):
"""Wait (nohang) on the task, return true if finished"""
if pid is None:
pid = self.pids.get(task_id)
if not pid:
raise koji.GenericError, "No pid for task %i" % task_id
prefix = "Task %i (pid %i)" % (task_id, pid)
try:
(childpid, status) = os.waitpid(pid, os.WNOHANG)
except OSError, e:
#check errno
if e.errno != errno.ECHILD:
#should not happen
raise
#otherwise assume the process is gone
self.logger.info("%s: %s" % (prefix, e))
return True
if childpid != 0:
self.logger.info(parseStatus(status, prefix))
return True
return False
def _doKill(self, task_id, pid, cmd, sig, timeout, pause):
"""
Kill the process with the given process ID.
Return True if the process is successfully killed in
the given timeout, False otherwise.
"""
self.logger.info('Checking "%s" (pid %i, taskID %i)...' % (cmd, pid, task_id))
execname = cmd.split()[0]
signaled = False
t = 0.0
while True:
status = self._getStat(pid)
if status and status[1] == cmd and status[2] != 'Z':
self.logger.info('%s (pid %i, taskID %i) is running' % (execname, pid, task_id))
else:
if signaled:
self.logger.info('%s (pid %i, taskID %i) was killed by signal %i' % (execname, pid, task_id, sig))
else:
self.logger.info('%s (pid %i, taskID %i) exited' % (execname, pid, task_id))
return True
if t >= timeout:
self.logger.warn('Failed to kill %s (pid %i, taskID %i) with signal %i' %
(execname, pid, task_id, sig))
return False
try:
os.kill(pid, sig)
except OSError, e:
# process probably went away, we'll find out on the next iteration
self.logger.info('Error sending signal %i to %s (pid %i, taskID %i): %s' %
(sig, execname, pid, task_id, e))
else:
signaled = True
self.logger.info('Sent signal %i to %s (pid %i, taskID %i)' %
(sig, execname, pid, task_id))
time.sleep(pause)
t += pause
def _getStat(self, pid):
"""
Get the stat info for the given pid.
Return a list of all the fields in /proc/<pid>/stat.
The second entry will contain the full command-line instead of
just the command name.
If the process does not exist, return None.
"""
try:
proc_path = '/proc/%i/stat' % pid
if not os.path.isfile(proc_path):
return None
proc_file = file(proc_path)
procstats = [not field.isdigit() and field or int(field) for field in proc_file.read().split()]
proc_file.close()
cmd_path = '/proc/%i/cmdline' % pid
if not os.path.isfile(cmd_path):
return None
cmd_file = file(cmd_path)
procstats[1] = cmd_file.read().replace('\0', ' ').strip()
cmd_file.close()
if not procstats[1]:
return None
return procstats
except IOError, e:
# process may have already gone away
return None
def _childPIDs(self, pid):
"""Recursively get the children of the process with the given ID.
Return a list containing the process IDs of the children
in breadth-first order, without duplicates."""
statsByPPID = {}
pidcmd = None
for procdir in os.listdir('/proc'):
if not procdir.isdigit():
continue
procid = int(procdir)
procstats = self._getStat(procid)
if not procstats:
continue
statsByPPID.setdefault(procstats[3], []).append(procstats)
if procid == pid:
pidcmd = procstats[1]
pids = []
if pidcmd:
# only append the pid if it still exists
pids.append((pid, pidcmd))
parents = [pid]
while parents:
for ppid in parents[:]:
for procstats in statsByPPID.get(ppid, []):
# get the /proc entries with ppid as their parent, and append their pid to the list,
# then recheck for their children
# pid is the 0th field, ppid is the 3rd field
pids.append((procstats[0], procstats[1]))
parents.append(procstats[0])
parents.remove(ppid)
return pids
def _killChildren(self, task_id, children, sig=signal.SIGTERM, timeout=2.0, pause=1.0):
"""
Kill child processes of the given task, as specified in the children list,
by sending sig.
Retry every pause seconds, within timeout.
Remove successfully killed processes from the "children" list.
"""
for childpid, cmd in children[::-1]:
# iterate in reverse order so processes whose children are killed might have
# a chance to cleanup before they're killed
if self._doKill(task_id, childpid, cmd, sig, timeout, pause):
children.remove((childpid, cmd))
def cleanupTask(self, task_id, wait=True):
"""Clean up after task
- kill children
- expire session
Return True if all children were successfully killed, False otherwise.
"""
pid = self.pids.get(task_id)
if not pid:
raise koji.GenericError, "No pid for task %i" % task_id
children = self._childPIDs(pid)
if children:
# send SIGINT once to let mock mock try to clean up
self._killChildren(task_id, children, sig=signal.SIGINT, pause=3.0)
if children:
self._killChildren(task_id, children)
if children:
self._killChildren(task_id, children, sig=signal.SIGKILL, timeout=3.0)
#expire the task's subsession
session_id = self.subsessions.get(task_id)
if session_id:
self.logger.info("Expiring subsession %i (task %i)" % (session_id, task_id))
try:
self.session.logoutChild(session_id)
del self.subsessions[task_id]
except:
#not much we can do about it
pass
if wait:
return self._waitTask(task_id, pid)
else:
# task has already been waited on, and we've cleaned
# up as much as we can
return True
def checkSpace(self):
"""See if we have enough space to accept another job"""
br_path = self.options.mockdir
if not os.path.exists(br_path):
self.logger.error("No such directory: %s" % br_path)
raise IOError, "No such directory: %s" % br_path
fs_stat = os.statvfs(br_path)
available = fs_stat.f_bavail * fs_stat.f_bsize
availableMB = available / 1024 / 1024
self.logger.debug("disk space available in '%s': %i MB", br_path, availableMB)
if availableMB < self.options.minspace:
self.status = "Insufficient disk space: %i MB, %i MB required" % (availableMB, self.options.minspace)
self.logger.warn(self.status)
return False
return True
def readyForTask(self):
"""Determine if the system is ready to accept a new task.
This function measures the system load and tries to determine
if there is room to accept a new task."""
# key resources to track:
# disk_space
# df -P path
# df -iP path ?
# memory (meminfo/vmstat)
# vmstat fields 3-6 (also 7-8 for swap)
# http://www.redhat.com/advice/tips/meminfo.html
# cpu cycles (vmstat?)
# vmstat fields 13-16 (and others?)
# others?:
# io (iostat/vmstat)
# network (netstat?)
if self.restart_pending:
if self.tasks:
return False
else:
raise koji.tasks.ServerRestart
self.hostdata = self.session.host.getHost()
self.logger.debug('hostdata: %r' % self.hostdata)
if not self.hostdata['enabled']:
self.status = "Host is disabled"
self.logger.info(self.status)
return False
if self.task_load > self.hostdata['capacity']:
self.status = "Over capacity"
self.logger.info("Task load (%.2f) exceeds capacity (%.2f)" % (self.task_load, self.hostdata['capacity']))
return False
if len(self.tasks) >= self.options.maxjobs:
# This serves as a backup to the capacity check and prevents
# a tremendous number of low weight jobs from piling up
self.status = "Full queue"
self.logger.info(self.status)
return False
if not self.checkSpace():
# checkSpace() does its own logging
return False
loadavgs = os.getloadavg()
# this likely treats HT processors the same as real ones
# but that's fine, it's a conservative test
maxload = 4.0 * os.sysconf('SC_NPROCESSORS_ONLN')
if loadavgs[0] > maxload:
self.status = "Load average %.2f > %.2f" % (loadavgs[0], maxload)
self.logger.info(self.status)
return False
#XXX - add more checks
return True
def takeTask(self,task):
"""Attempt to open the specified task
Returns True if successful, False otherwise
"""
self.logger.info("Attempting to take task %s" % task['id'])
method = task['method']
if self.handlers.has_key(method):
handlerClass = self.handlers[method]
else:
raise koji.GenericError, "No handler found for method '%s'" % method
task_info = self.session.getTaskInfo(task['id'], request=True)
if task_info.get('request') is None:
self.logger.warn("Task '%s' has no request" % task['id'])
return False
params = task_info['request']
handler = handlerClass(task_info['id'], method, params, self.session, self.options)
if hasattr(handler, 'checkHost'):
try:
valid_host = handler.checkHost(self.hostdata)
except (SystemExit,KeyboardInterrupt):
raise
except:
valid_host = False
self.logger.warn('Error during host check')
self.logger.warn(''.join(traceback.format_exception(*sys.exc_info())))
if not valid_host:
self.logger.info('Skipping task %s (%s) due to host check', task['id'], task['method'])
return False
data = self.session.host.openTask(task['id'])
if data is None:
self.logger.warn("Could not open")
return False
task_id = data['id']
request = data['request']
self.tasks[task_id] = data
# set weight
try:
self.session.host.setTaskWeight(task_id, handler.weight())
except koji.ActionNotAllowed:
info2 = self.session.getTaskInfo(task['id'])
if info2['host_id'] != self.host_id:
self.logger.warn("Task %i was reassigned", task_id)
return False
state = koji.TASK_STATES[info2['state']]
if state != 'OPEN':
self.logger.warn("Task %i changed is %s", task_id, state)
return False
#otherwise...
raise
if handler.Foreground:
self.logger.info("running task in foreground")
handler.setManager(self)
self.runTask(handler)
else:
pid, session_id = self.forkTask(handler)
self.pids[task_id] = pid
self.subsessions[task_id] = session_id
return True
def forkTask(self,handler):
#get the subsession before we fork
newhub = self.session.subsession()
session_id = newhub.sinfo['session-id']
pid = os.fork()
if pid:
newhub._forget()
return pid, session_id
#in no circumstance should we return after the fork
#nor should any exceptions propagate past here
try:
self.session._forget()
#set process group
os.setpgrp()
#use the subsession
self.session = newhub
handler.session = self.session
#set a do-nothing handler for sigusr2
signal.signal(signal.SIGUSR2,lambda *args: None)
self.runTask(handler)
finally:
#diediedie
try:
self.session.logout()
finally:
os._exit(0)
def runTask(self,handler):
try:
response = (handler.run(),)
# note that we wrap response in a singleton tuple
response = xmlrpclib.dumps(response, methodresponse=1, allow_none=1)
self.logger.info("RESPONSE: %r" % response)
self.session.host.closeTask(handler.id, response)
return
except xmlrpclib.Fault, fault:
response = xmlrpclib.dumps(fault)
tb = ''.join(traceback.format_exception(*sys.exc_info())).replace(r"\n", "\n")
self.logger.warn("FAULT:\n%s" % tb)
except (SystemExit,koji.tasks.ServerExit,KeyboardInterrupt):
#we do not trap these
raise
except koji.tasks.ServerRestart:
#freeing this task will allow the pending restart to take effect
self.session.host.freeTasks([handler.id])
return
except:
tb = ''.join(traceback.format_exception(*sys.exc_info()))
self.logger.warn("TRACEBACK: %s" % tb)
# report exception back to server
e_class, e = sys.exc_info()[:2]
faultCode = getattr(e_class,'faultCode',1)
if issubclass(e_class, koji.GenericError):
#just pass it through
tb = str(e)
response = xmlrpclib.dumps(xmlrpclib.Fault(faultCode, tb))
# if we get here, then we're handling an exception, so fail the task
self.session.host.failTask(handler.id, response)
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