2 # Copyright (C) The Arvados Authors. All rights reserved.
4 # SPDX-License-Identifier: AGPL-3.0
6 from __future__ import absolute_import, print_function
12 ComputeNodeSetupActor, ComputeNodeMonitorActor
13 from . import ComputeNodeShutdownActor as ShutdownActorBase
14 from . import ComputeNodeUpdateActor as UpdateActorBase
15 from .. import RetryMixin
17 class SlurmMixin(object):
18 SLURM_END_STATES = frozenset(['down\n', 'down*\n',
19 'drain\n', 'drain*\n',
21 SLURM_DRAIN_STATES = frozenset(['drain\n', 'drng\n'])
23 def _set_node_state(self, nodename, state, *args):
24 cmd = ['scontrol', 'update', 'NodeName=' + nodename,
27 subprocess.check_output(cmd)
29 def _get_slurm_state(self, nodename):
30 return subprocess.check_output(['sinfo', '--noheader', '-o', '%t', '-n', nodename])
33 class ComputeNodeShutdownActor(SlurmMixin, ShutdownActorBase):
35 arv_node = self._arvados_node()
38 return super(ComputeNodeShutdownActor, self).on_start()
41 self._nodename = arv_node['hostname']
42 self._logger.info("Draining SLURM node %s", self._nodename)
43 self._later.issue_slurm_drain()
45 @RetryMixin._retry((subprocess.CalledProcessError, OSError))
46 def cancel_shutdown(self, reason, try_resume=True):
48 if try_resume and self._get_slurm_state(self._nodename) in self.SLURM_DRAIN_STATES:
49 # Resume from "drng" or "drain"
50 self._set_node_state(self._nodename, 'RESUME')
52 # Node is in a state such as 'idle' or 'alloc' so don't
53 # try to resume it because that will just raise an error.
55 return super(ComputeNodeShutdownActor, self).cancel_shutdown(reason)
57 @RetryMixin._retry((subprocess.CalledProcessError, OSError))
58 def issue_slurm_drain(self):
59 if self.cancel_reason is not None:
62 self._set_node_state(self._nodename, 'DRAIN', 'Reason=Node Manager shutdown')
63 self._logger.info("Waiting for SLURM node %s to drain", self._nodename)
64 self._later.await_slurm_drain()
66 self._later.shutdown_node()
68 @RetryMixin._retry((subprocess.CalledProcessError, OSError))
69 def await_slurm_drain(self):
70 if self.cancel_reason is not None:
72 output = self._get_slurm_state(self._nodename)
73 if output in ("drng\n", "alloc\n", "drng*\n", "alloc*\n"):
74 self._timer.schedule(time.time() + 10,
75 self._later.await_slurm_drain)
76 elif output in ("idle\n"):
77 # Not in "drng" but idle, don't shut down
78 self.cancel_shutdown("slurm state is %s" % output.strip(), try_resume=False)
81 self._later.shutdown_node()
83 def _destroy_node(self):
85 self._set_node_state(self._nodename, 'DOWN', 'Reason=Node Manager shutdown')
86 super(ComputeNodeShutdownActor, self)._destroy_node()
89 class ComputeNodeUpdateActor(UpdateActorBase):
90 def sync_node(self, cloud_node, arvados_node):
91 if arvados_node.get("hostname"):
93 subprocess.check_output(['scontrol', 'update', 'NodeName=' + arvados_node["hostname"], 'Weight=%i' % int(cloud_node.size.price * 1000)])
95 self._logger.error("Unable to set slurm node weight.", exc_info=True)
96 return super(ComputeNodeUpdateActor, self).sync_node(cloud_node, arvados_node)