class SlurmdbdCharm(CharmBase):
"""Slurmdbd Charm."""
_stored = StoredState()
def __init__(self, *args):
"""Set the default class attributes."""
super().__init__(*args)
self._stored.set_default(
db_info=dict(),
slurmdbd_config=dict(),
munge_key_available=False,
slurm_installed=False,
)
self._db = MySQLClient(self, "db")
self._nrpe = Nrpe(self, "nrpe-external-master")
self._slurm_manager = SlurmManager(self, "slurmdbd")
self._slurmdbd = Slurmdbd(self, "slurmdbd")
self._slurmdbd_peer = SlurmdbdPeer(self, "slurmdbd-peer")
event_handler_bindings = {
self.on.install: self._on_install,
self.on.config_changed: self._write_config_and_restart_slurmdbd,
self._db.on.database_available: self._write_config_and_restart_slurmdbd,
self._slurmdbd_peer.on.slurmdbd_peer_available: self._write_config_and_restart_slurmdbd,
self._slurmdbd.on.slurmdbd_available: self._write_config_and_restart_slurmdbd,
self._slurmdbd.on.slurmdbd_unavailable: self._on_slurm_configurator_unavailable,
self._slurmdbd.on.munge_key_available: self._on_munge_key_available,
}
for event, handler in event_handler_bindings.items():
self.framework.observe(event, handler)
def _on_install(self, event):
self._slurm_manager.install(self.config["snapstore-channel"])
self._stored.slurm_installed = True
self.unit.status = ActiveStatus("slurm snap successfully installed")
def _on_upgrade(self, event):
"""Handle upgrade charm event."""
self._slurm_manager.upgrade()
def _on_munge_key_available(self, event):
if not self._stored.slurm_installed:
event.defer()
return
munge_key = self._slurmdbd.get_munge_key()
self._slurm_manager.configure_munge_key(munge_key)
self._slurm_manager.restart_munged()
self._stored.munge_key_available = True
def _on_slurm_configurator_unavailable(self, event):
self._stored.munge_key_available = False
self._check_status()
def _check_status(self) -> bool:
"""Check that we have the things we need."""
db_info = self._stored.db_info
munge_key_available = self._stored.munge_key_available
slurm_installed = self._stored.slurm_installed
slurmdbd_info = self._slurmdbd_peer.get_slurmdbd_info()
deps = [
slurmdbd_info,
db_info,
slurm_installed,
munge_key_available,
]
if not all(deps):
if not db_info:
self.unit.status = BlockedStatus(
"Need relation to MySQL."
)
elif not munge_key_available:
self.unit.status = BlockedStatus(
"Need relation to slurm-configurator."
)
return False
return True
def _write_config_and_restart_slurmdbd(self, event):
"""Check for prereqs before writing config/restart of slurmdbd."""
# Ensure all pre-conditions are met with _check_status(), if not
# defer the event.
if not self._check_status():
event.defer()
return
db_info = self._stored.db_info
slurmdbd_info = self._slurmdbd_peer.get_slurmdbd_info()
slurmdbd_stored_config = dict(self._stored.slurmdbd_config)
slurmdbd_config = {
**self.config,
**slurmdbd_info,
**db_info,
}
if slurmdbd_config != slurmdbd_stored_config:
self._stored.slurmdbd_config = slurmdbd_config
self._slurm_manager.render_slurm_configs(slurmdbd_config)
self._slurm_manager.restart_slurm_component()
# Only the leader can set relation data on the application.
# Enforce that no one other then the leader trys to set
# application relation data.
if self.model.unit.is_leader():
self._slurmdbd.set_slurmdbd_info_on_app_relation_data(
slurmdbd_config,
)
self.unit.status = ActiveStatus("slurmdbd available")
def get_port(self):
"""Return the port from slurm-ops-manager."""
return self._slurm_manager.port
def get_hostname(self):
"""Return the hostname from slurm-ops-manager."""
return self._slurm_manager.hostname
def set_db_info(self, db_info):
"""Set the db_info in the stored state."""
self._stored.db_info = db_info
class SlurmdbdCharm(CharmBase):
"""Slurmdbd Charm."""
_stored = StoredState()
def __init__(self, *args):
"""Set the default class attributes."""
super().__init__(*args)
self._stored.set_default(munge_key=str())
self._stored.set_default(db_info=dict())
self._stored.set_default(slurm_installed=False)
self._nrpe = Nrpe(self, "nrpe-external-master")
self._slurm_manager = SlurmManager(self, "slurmdbd")
self._slurmdbd = Slurmdbd(self, "slurmdbd")
self._slurmdbd_peer = SlurmdbdPeer(self, "slurmdbd-peer")
self._db = MySQLClient(self, "db")
event_handler_bindings = {
self.on.install: self._on_install,
self.on.config_changed: self._write_config_and_restart_slurmdbd,
self._db.on.database_available:
self._write_config_and_restart_slurmdbd,
self._slurmdbd_peer.on.slurmdbd_peer_available:
self._write_config_and_restart_slurmdbd,
self._slurmdbd.on.slurmdbd_available:
self._write_config_and_restart_slurmdbd,
self._slurmdbd.on.slurmdbd_unavailable:
self._on_slurmdbd_unavailable,
}
for event, handler in event_handler_bindings.items():
self.framework.observe(event, handler)
def _on_install(self, event):
self._slurm_manager.install()
self._stored.slurm_installed = True
self.unit.status = ActiveStatus("Slurm Installed")
def _on_upgrade(self, event):
"""Handle upgrade charm event."""
self._slurm_manager.upgrade()
def _on_leader_elected(self, event):
self._slurmdbd_peer._on_relation_changed(event)
def _on_slurmdbd_unavailable(self, event):
self._check_status()
def _check_status(self) -> bool:
"""Check that we have the things we need."""
db_info = self._stored.db_info
munge_key = self._stored.munge_key
slurm_installed = self._stored.slurm_installed
slurmdbd_info = self._slurmdbd_peer.get_slurmdbd_info()
deps = [
slurmdbd_info,
db_info,
slurm_installed,
munge_key,
]
if not all(deps):
if not db_info:
self.unit.status = BlockedStatus("Need relation to MySQL.")
elif not munge_key:
self.unit.status = BlockedStatus(
"Need relation to slurm-configurator.")
return False
return True
def _write_config_and_restart_slurmdbd(self, event):
"""Check for prereqs before writing config/restart of slurmdbd."""
if not self._check_status():
event.defer()
return
db_info = self._stored.db_info
slurmdbd_info = self._slurmdbd_peer.get_slurmdbd_info()
slurmdbd_config = {
'munge_key': self._stored.munge_key,
**self.model.config,
**slurmdbd_info,
**db_info,
}
if self.model.unit.is_leader():
self._slurmdbd.set_slurmdbd_info_on_app_relation_data(
slurmdbd_info)
self._slurm_manager.render_config_and_restart(slurmdbd_config)
self.unit.status = ActiveStatus("Slurmdbd Available")
def get_port(self):
"""Return the port from slurm-ops-manager."""
return self._slurm_manager.port
def get_hostname(self):
"""Return the hostname from slurm-ops-manager."""
return self._slurm_manager.hostname
def get_slurm_component(self):
"""Return the slurm component."""
return self._slurm_manager.slurm_component
def set_munge_key(self, munge_key):
"""Set the munge key in the stored state."""
self._stored.munge_key = munge_key
def set_db_info(self, db_info):
"""Set the db_info in the stored state."""
self._stored.db_info = db_info
class SlurmdbdCharm(CharmBase):
"""Slurmdbd Charm."""
_stored = StoredState()
on = SlurmdbdCharmEvents()
def __init__(self, *args):
"""Set the default class attributes."""
super().__init__(*args)
self._stored.set_default(db_info=dict(),
jwt_available=False,
munge_available=False,
slurm_installed=False,
cluster_name=str())
self._db = MySQLClient(self, "db")
# self._nrpe = Nrpe(self, "nrpe-external-master")
self._slurm_manager = SlurmManager(self, "slurmdbd")
self._slurmdbd = Slurmdbd(self, "slurmdbd")
self._slurmdbd_peer = SlurmdbdPeer(self, "slurmdbd-peer")
self._fluentbit = FluentbitClient(self, "fluentbit")
event_handler_bindings = {
self.on.install:
self._on_install,
self.on.upgrade_charm:
self._on_upgrade,
self.on.update_status:
self._on_update_status,
self.on.config_changed:
self._write_config_and_restart_slurmdbd,
self.on.jwt_available:
self._on_jwt_available,
self.on.munge_available:
self._on_munge_available,
self.on.write_config:
self._write_config_and_restart_slurmdbd,
self._db.on.database_available:
self._write_config_and_restart_slurmdbd,
self._db.on.database_unavailable:
self._on_db_unavailable,
self._slurmdbd_peer.on.slurmdbd_peer_available:
self._write_config_and_restart_slurmdbd,
self._slurmdbd.on.slurmctld_available:
self._on_slurmctld_available,
self._slurmdbd.on.slurmctld_unavailable:
self._on_slurmctld_unavailable,
# fluentbit
self.on["fluentbit"].relation_created:
self._on_fluentbit_relation_created,
}
for event, handler in event_handler_bindings.items():
self.framework.observe(event, handler)
def _on_install(self, event):
"""Perform installation operations for slurmdbd."""
self.unit.set_workload_version(Path("version").read_text().strip())
self.unit.status = WaitingStatus("Installing slurmdbd")
custom_repo = self.config.get("custom-slurm-repo")
successful_installation = self._slurm_manager.install(custom_repo)
if successful_installation:
self._stored.slurm_installed = True
self.unit.status = ActiveStatus("slurmdbd successfully installed")
else:
self.unit.status = BlockedStatus("Error installing slurmdbd")
event.defer()
return
self._check_status()
def _on_fluentbit_relation_created(self, event):
"""Set up Fluentbit log forwarding."""
self._configure_fluentbit()
def _configure_fluentbit(self):
logger.debug("## Configuring fluentbit")
cfg = list()
cfg.extend(self._slurm_manager.fluentbit_config_nhc)
cfg.extend(self._slurm_manager.fluentbit_config_slurm)
self._fluentbit.configure(cfg)
def _on_upgrade(self, event):
"""Perform upgrade operations."""
self.unit.set_workload_version(Path("version").read_text().strip())
def _on_update_status(self, event):
"""Handle update status."""
self._check_status()
def _on_jwt_available(self, event):
"""Retrieve and configure the jwt_rsa key."""
# jwt rsa lives in slurm spool dir, it is created when slurm is installed
if not self._stored.slurm_installed:
event.defer()
return
jwt_rsa = self._slurmdbd.get_jwt_rsa()
self._slurm_manager.configure_jwt_rsa(jwt_rsa)
self._stored.jwt_available = True
def _on_munge_available(self, event):
"""Retrieve munge key and start munged."""
# munge is installed together with slurm
if not self._stored.slurm_installed:
event.defer()
return
munge_key = self._slurmdbd.get_munge_key()
self._slurm_manager.configure_munge_key(munge_key)
if self._slurm_manager.restart_munged():
logger.debug("## Munge restarted succesfully")
self._stored.munge_available = True
else:
logger.error("## Unable to restart munge")
self.unit.status = BlockedStatus("Error restarting munge")
event.defer()
def _on_db_unavailable(self, event):
self._stored.db_info = dict()
# TODO tell slurmctld that slurmdbd left?
self._check_status()
def _on_slurmctld_available(self, event):
self.on.jwt_available.emit()
self.on.munge_available.emit()
self.on.write_config.emit()
if self._fluentbit._relation is not None:
self._configure_fluentbit()
def _on_slurmctld_unavailable(self, event):
"""Reset state and charm status when slurmctld broken."""
self._stored.jwt_available = False
self._stored.munge_available = False
self._check_status()
def _is_leader(self):
return self.model.unit.is_leader()
def _write_config_and_restart_slurmdbd(self, event):
"""Check for prereqs before writing config/restart of slurmdbd."""
# Ensure all pre-conditions are met with _check_status(), if not
# defer the event.
if not self._check_status():
event.defer()
return
db_info = self._stored.db_info
slurmdbd_info = self._slurmdbd_peer.get_slurmdbd_info()
# settings from the config.yaml
config = {"slurmdbd_debug": self.config.get("slurmdbd-debug")}
slurmdbd_config = {
**config,
**slurmdbd_info,
**db_info,
}
self._slurm_manager.slurm_systemctl("stop")
self._slurm_manager.render_slurm_configs(slurmdbd_config)
# At this point, we must guarantee that slurmdbd is correctly
# initialized. Its startup might take a while, so we have to wait
# for it.
self._check_slurmdbd()
# Only the leader can set relation data on the application.
# Enforce that no one other then the leader trys to set
# application relation data.
if self.model.unit.is_leader():
self._slurmdbd.set_slurmdbd_info_on_app_relation_data(
slurmdbd_config, )
self._check_status()
def _check_slurmdbd(self, max_attemps=3) -> None:
"""Ensure slurmdbd is up and running."""
logger.debug("## Checking if slurmdbd is active")
for i in range(max_attemps):
if self._slurm_manager.slurm_is_active():
logger.debug("## Slurmdbd running")
break
else:
logger.warning("## Slurmdbd not running, trying to start it")
self.unit.status = WaitingStatus("Starting slurmdbd")
self._slurm_manager.restart_slurm_component()
sleep(1 + i)
if self._slurm_manager.slurm_is_active():
self._check_status()
else:
self.unit.status = BlockedStatus("Cannot start slurmdbd")
def _check_status(self) -> bool:
"""Check that we have the things we need."""
if self._slurm_manager.needs_reboot:
self.unit.status = BlockedStatus("Machine needs reboot")
return False
slurm_installed = self._stored.slurm_installed
if not slurm_installed:
self.unit.status = BlockedStatus("Error installing slurm")
return False
# we must be sure to initialize the charms correctly. Slurmdbd must
# first connect to the db to be able to connect to slurmctld correctly
slurmctld_available = (self._stored.jwt_available
and self._stored.munge_available)
statuses = {
"MySQL": {
"available": self._stored.db_info != dict(),
"joined": self._db.is_joined
},
"slurcmtld": {
"available": slurmctld_available,
"joined": self._slurmdbd.is_joined
}
}
relations_needed = list()
waiting_on = list()
for component in statuses.keys():
if not statuses[component]["joined"]:
relations_needed.append(component)
if not statuses[component]["available"]:
waiting_on.append(component)
if len(relations_needed):
msg = f"Need relations: {','.join(relations_needed)}"
self.unit.status = BlockedStatus(msg)
return False
if len(waiting_on):
msg = f"Wating on: {','.join(waiting_on)}"
self.unit.status = WaitingStatus(msg)
return False
slurmdbd_info = self._slurmdbd_peer.get_slurmdbd_info()
if not slurmdbd_info:
self.unit.status = WaitingStatus("slurmdbd starting")
return False
if not self._slurm_manager.check_munged():
self.unit.status = WaitingStatus("munged starting")
return False
self.unit.status = ActiveStatus("slurmdbd available")
return True
def get_port(self):
"""Return the port from slurm-ops-manager."""
return self._slurm_manager.port
def get_hostname(self):
"""Return the hostname from slurm-ops-manager."""
return self._slurm_manager.hostname
def set_db_info(self, db_info):
"""Set the db_info in the stored state."""
self._stored.db_info = db_info
@property
def cluster_name(self) -> str:
"""Return the cluster-name."""
return self._stored.cluster_name
@cluster_name.setter
def cluster_name(self, name: str):
"""Set the cluster-name."""
self._stored.cluster_name = name
class SlurmdbdCharm(CharmBase):
"""Slurmdbd Charm."""
_stored = StoredState()
def __init__(self, *args):
"""Set the default class attributes."""
super().__init__(*args)
self._stored.set_default(munge_key=str())
self._stored.set_default(db_info=dict())
self._stored.set_default(slurm_installed=False)
self._nrpe = Nrpe(self, "nrpe-external-master")
self._slurm_manager = SlurmManager(self, "slurmdbd")
self._slurmdbd = Slurmdbd(self, "slurmdbd")
self._slurmdbd_peer = SlurmdbdPeer(self, "slurmdbd-peer")
self._db = MySQLClient(self, "db")
event_handler_bindings = {
self.on.install: self._on_install,
self.on.config_changed: self._write_config_and_restart_slurmdbd,
self._db.on.database_available:
self._write_config_and_restart_slurmdbd,
self._slurmdbd_peer.on.slurmdbd_peer_available:
self._write_config_and_restart_slurmdbd,
self._slurmdbd.on.slurmdbd_available:
self._write_config_and_restart_slurmdbd,
self._slurmdbd.on.slurmdbd_unavailable:
self._on_slurmdbd_unavailable,
}
for event, handler in event_handler_bindings.items():
self.framework.observe(event, handler)
def _on_install(self, event):
self._slurm_manager.install()
self._stored.slurm_installed = True
self.unit.status = ActiveStatus("Slurm Installed")
def _on_upgrade(self, event):
"""Handle upgrade charm event."""
self._slurm_manager.upgrade()
def _on_leader_elected(self, event):
self._slurmdbd_peer._on_relation_changed(event)
def _on_slurmdbd_unavailable(self, event):
self._check_status()
def _check_status(self) -> bool:
"""Check that we have the things we need."""
db_info = self._stored.db_info
munge_key = self._stored.munge_key
slurm_installed = self._stored.slurm_installed
slurmdbd_info = self._slurmdbd_peer.get_slurmdbd_info()
deps = [
slurmdbd_info,
db_info,
slurm_installed,
munge_key,
]
if not all(deps):
if not db_info:
self.unit.status = BlockedStatus("Need relation to MySQL.")
elif not munge_key:
self.unit.status = BlockedStatus(
"Need relation to slurm-configurator.")
return False
return True
def _write_config_and_restart_slurmdbd(self, event):
"""Check for prereqs before writing config/restart of slurmdbd."""
# Ensure all pre-conditions are met with _check_statu(), if not
# defer the event.
if not self._check_status():
event.defer()
return
db_info = self._stored.db_info
slurmdbd_info = self._slurmdbd_peer.get_slurmdbd_info()
slurmdbd_config = {
'munge_key': self._stored.munge_key,
**self.model.config,
**slurmdbd_info,
**db_info,
}
self._slurm_manager.render_config_and_restart(slurmdbd_config)
logger.debug("rendering config and restarting")
# Only the leader can set relation data on the application.
# Enforce that no one other then the leader trys to set
# application relation data.
if self.model.unit.is_leader():
self._slurmdbd.set_slurmdbd_info_on_app_relation_data({
# Juju, and subsequently the operator framework do not
# emit relation-changed events if data hasn't actually
# changed on the other side of the relation. Even if we set
# the data multiple times, it doesn't mean anything unless
# the data being set is different then what already exists
# in the relation data.
#
# We use 'slurmdbd_info_id' to ensure the slurmdbd_info
# is unique each time it is set on the application relation
# data. This is needed so that that related applications
# (namely slurm-configurator) will observe a
# relation-changed event.
#
# This event (_write_config_and_restart_slurmdbd) may be
# invoked multiple times once _check_status() returns True
# (aka pre-conditions are met that account for the deffered
# invocations.)
# This means that the same slurmdbd_info data may be set on
# application data multiple times and slurmdbd may be
# reconfigured and restarted while slurmctld and the rest
# of the stack are trying to come up and create the clustr.
#
# We need slurm-configurator to emit the relation-changed
# event for the slurmdbd relation every time data is set,
# not just when data has changed.
# slurm-configurator need to re-emit its chain
# of observed events to ensure all services end up getting
# reconfigured *and* restarted *after* slurmdbd, for each
# time that slurmdbd gets reconfigured and restarted.
#
# For this reason, 'slurmdbd_info_id' only
# matters in the context of making sure the application
# relation data actually changes so that relation-changed
# event is observed on the other side.
'slurmdbd_info_id':
str(uuid.uuid4()),
**slurmdbd_info
})
self.unit.status = ActiveStatus("Slurmdbd Available")
def get_port(self):
"""Return the port from slurm-ops-manager."""
return self._slurm_manager.port
def get_hostname(self):
"""Return the hostname from slurm-ops-manager."""
return self._slurm_manager.hostname
def get_slurm_component(self):
"""Return the slurm component."""
return self._slurm_manager.slurm_component
def set_munge_key(self, munge_key):
"""Set the munge key in the stored state."""
self._stored.munge_key = munge_key
def set_db_info(self, db_info):
"""Set the db_info in the stored state."""
self._stored.db_info = db_info