def start(self):
"""
Start multiple workerpools, possibly on remote servers via ssh,
assuming there is an active streamer.
"""
starting = []
for host, cores in self.host_cores:
if general.socket_ready((host, self.ctrl_port)):
print('%s:%s already running' % (host, self.ctrl_port))
continue
ctrl_url = 'tcp://0.0.0.0:%s' % self.ctrl_port
if host == '127.0.0.1': # localhost
args = [sys.executable]
else:
args = [
'ssh', '-f', '-T', f'{self.remote_user}@{host}',
self.remote_python
]
args += [
'-m', 'openquake.baselib.workerpool', ctrl_url, '-n', cores
]
if host != '127.0.0.1':
print('%s: if it hangs, check the ssh keys' % ' '.join(args))
self.popens.append(subprocess.Popen(args))
starting.append(host)
return 'starting %s' % starting
def set_concurrent_tasks_default(calc):
"""
Set the default for concurrent_tasks based on the available
worker pools .
"""
num_workers = 0
w = config.zworkers
if w.host_cores:
host_cores = [hc.split() for hc in w.host_cores.split(',')]
else:
host_cores = []
for host, _cores in host_cores:
url = 'tcp://%s:%s' % (host, w.ctrl_port)
with z.Socket(url, z.zmq.REQ, 'connect') as sock:
if not general.socket_ready(url):
logging.warning('%s is not running', host)
continue
num_workers += sock.send('get_num_workers')
if num_workers == 0:
num_workers = os.cpu_count()
logging.warning(
'Missing host_cores, no idea about how many cores '
'are available, using %d', num_workers)
parallel.CT = num_workers * 2
OqParam.concurrent_tasks.default = num_workers * 2
logging.warning('Using %d zmq workers', num_workers)
def start(self, streamer=False):
"""
Start multiple workerpools, possibly on remote servers via ssh,
and possibly a streamer, depending on the `streamercls`.
:param streamer:
if True, starts a streamer with multiprocessing.Process
"""
if streamer and not general.socket_ready(self.task_in_url): # started
self.streamer = multiprocessing.Process(
target=_streamer,
args=(self.master_host, self.task_in_port, self.task_out_port))
self.streamer.start()
starting = []
for host, cores in self.host_cores:
if self.status(host)[0][1] == 'running':
print('%s:%s already running' % (host, self.ctrl_port))
continue
ctrl_url = 'tcp://%s:%s' % (host, self.ctrl_port)
if host == '127.0.0.1': # localhost
args = [sys.executable]
else:
args = ['ssh', host, self.remote_python]
args += ['-m', 'openquake.baselib.workerpool',
ctrl_url, self.task_out_url, cores]
starting.append(' '.join(args))
po = subprocess.Popen(args)
self.pids.append(po.pid)
return 'starting %s' % starting
def start(self, streamer=False):
"""
Start multiple workerpools, possibly on remote servers via ssh,
and possibly a streamer, depending on the `streamercls`.
:param streamer:
if True, starts a streamer with multiprocessing.Process
"""
if streamer and not general.socket_ready(self.task_in_url): # started
self.streamer = multiprocessing.Process(target=_streamer,
args=(self.master_host,
self.task_in_port,
self.task_out_port))
self.streamer.start()
starting = []
for host, cores in self.host_cores:
if self.status(host)[0][1] == 'running':
print('%s:%s already running' % (host, self.ctrl_port))
continue
ctrl_url = 'tcp://%s:%s' % (host, self.ctrl_port)
if host == '127.0.0.1': # localhost
args = [sys.executable]
else:
args = ['ssh', host, self.remote_python]
args += [
'-m', 'openquake.baselib.workerpool', ctrl_url,
self.task_out_url, cores
]
starting.append(' '.join(args))
po = subprocess.Popen(args)
self.pids.append(po.pid)
return 'starting %s' % starting
def setUpClass(cls):
cls.z = config.zworkers.copy()
host_cores = '127.0.0.1 4'
hostport = '127.0.0.1', int(cls.z['ctrl_port']) + 1
if not socket_ready(hostport):
raise unittest.SkipTest('The task streamer is off')
cls.master = WorkerMaster('127.0.0.1', cls.z['ctrl_port'], host_cores)
cls.master.start()
def get_status(address=None):
"""
Check if the DbServer is up.
:param address: pair (hostname, port)
:returns: 'running' or 'not-running'
"""
address = address or (config.dbserver.host, DBSERVER_PORT)
return 'running' if socket_ready(address) else 'not-running'
def get_status(address=None):
"""
Check if the DbServer is up.
:param address: pair (hostname, port)
:returns: 'running' or 'not-running'
"""
address = address or (config.dbserver.host, DBSERVER_PORT)
return 'running' if socket_ready(address) else 'not-running'
def status(self, host=None):
"""
:returns: a list of pairs (hostname, 'running'|'not-running')
"""
if host is None:
host_cores = self.host_cores
else:
host_cores = [hc for hc in self.host_cores if hc[0] == host]
lst = []
for host, _ in host_cores:
ready = general.socket_ready((host, self.ctrl_port))
lst.append((host, 'running' if ready else 'not-running'))
return lst
def status(self, host=None):
"""
:returns: a list of pairs (hostname, 'running'|'not-running')
"""
if host is None:
host_cores = self.host_cores
else:
host_cores = [hc for hc in self.host_cores if hc[0] == host]
lst = []
for host, _ in host_cores:
ready = general.socket_ready((host, self.ctrl_port))
lst.append((host, 'running' if ready else 'not-running'))
return lst
def check_status(**kw):
"""
:returns: a non-empty error string if the streamer or worker pools are down
"""
c = config.zworkers.copy()
c.update(kw)
hostport = config.dbserver.listen, int(c['ctrl_port']) + 1
errors = []
if not general.socket_ready(hostport):
errors.append('The task streamer on %s:%s is down' % hostport)
for host, status in WorkerMaster(**c).status():
if status != 'running':
errors.append('The workerpool on %s is down' % host)
return '\n'.join(errors)
def status(self):
"""
:returns: a list [(host, running, total), ...]
"""
executing = []
for host, _cores in self.host_cores:
if not general.socket_ready((host, self.ctrl_port)):
continue
ctrl_url = 'tcp://%s:%s' % (host, self.ctrl_port)
with z.Socket(ctrl_url, z.zmq.REQ, 'connect') as sock:
running = len(sock.send('get_executing').split())
total = sock.send('get_num_workers')
executing.append((host, running, total))
return executing
def set_concurrent_tasks_default(job_id):
"""
Set the default for concurrent_tasks based on the available
worker pools .
"""
num_workers = 0
w = config.zworkers
for host, _cores in [hc.split() for hc in w.host_cores.split(',')]:
url = 'tcp://%s:%s' % (host, w.ctrl_port)
with z.Socket(url, z.zmq.REQ, 'connect') as sock:
if not general.socket_ready(url):
logs.LOG.warn('%s is not running', host)
continue
num_workers += sock.send('get_num_workers')
OqParam.concurrent_tasks.default = num_workers * 2
logs.LOG.warn('Using %d zmq workers', num_workers)
def kill(self):
"""
Send a "kill" command to all worker pools
"""
killed = []
for host, _ in self.host_cores:
if not general.socket_ready((host, self.ctrl_port)):
continue
ctrl_url = 'tcp://%s:%s' % (host, self.ctrl_port)
with z.Socket(ctrl_url, z.zmq.REQ, 'connect') as sock:
sock.send('kill')
killed.append(host)
for popen in self.popens:
popen.kill()
self.popens = []
return 'killed %s' % killed
def set_concurrent_tasks_default(job_id):
"""
Set the default for concurrent_tasks based on the available
worker pools .
"""
num_workers = 0
w = config.zworkers
for host, _cores in [hc.split() for hc in w.host_cores.split(',')]:
url = 'tcp://%s:%s' % (host, w.ctrl_port)
with z.Socket(url, z.zmq.REQ, 'connect') as sock:
if not general.socket_ready(url):
logs.LOG.warn('%s is not running', host)
continue
num_workers += sock.send('get_num_workers')
OqParam.concurrent_tasks.default = num_workers * 3
logs.LOG.warn('Using %d zmq workers', num_workers)
def stop(self):
"""
Send a "stop" command to all worker pools
"""
stopped = []
for host, _ in self.host_cores:
if not general.socket_ready((host, self.ctrl_port)):
continue
ctrl_url = 'tcp://%s:%s' % (host, self.ctrl_port)
with z.Socket(ctrl_url, z.zmq.REQ, 'connect') as sock:
sock.send('stop')
stopped.append(host)
for popen in self.popens:
popen.terminate()
# since we are not consuming any output from the spawned process
# we must call wait() after terminate() to have Popen()
# fully deallocate the process file descriptors, otherwise
# zombies will arise
popen.wait()
self.popens = []
return 'stopped %s' % stopped
