def start_rebalance(self, pool_fid: Fid):
LOG.debug('Initiating rebalance for pool %s', pool_fid)
result: int = self._ffi.start_rebalance(self._ha_ctx, pool_fid.to_c())
if result:
raise RepairRebalanceException(
'Failed to send SPIEL request "sns_rebalance_start",' +
'please check Motr logs for more details.')
LOG.debug('Rebalancing started for pool %s', pool_fid)
def get_rebalance_status(self, pool_fid: Fid) -> List[ReprebStatus]:
LOG.debug('Fetching rebalance status for pool %s', pool_fid)
status: List[ReprebStatus] = self._ffi.rebalance_status(
self._ha_ctx, pool_fid.to_c())
if status is None:
raise RepairRebalanceException('rebalance status unavailable')
LOG.debug('rebalance status for pool %s: %s', pool_fid, status)
return status
def resume_repair(self, pool_fid: Fid):
LOG.debug('Resuming repair for pool %s', pool_fid)
result: int = self._ffi.resume_repair(self._ha_ctx, pool_fid.to_c())
if result:
raise RepairRebalanceException(
'Failed to send SPIEL request "sns_repair_resume",'
'please check Motr logs for more details.')
LOG.debug('Repairing resumed for pool %s', pool_fid)
def stop_repair(self, pool_fid: Fid):
LOG.debug('Stopping repair for pool %s', pool_fid)
result: int = self._ffi.stop_repair(self._ha_ctx, pool_fid.to_c())
if result:
raise RepairRebalanceException(
'Failed to send SPIEL request "sns_repair_stop", please' +
' check Motr logs for more details.')
LOG.debug('Repairing stoped for pool %s', pool_fid)
def start(self, rpc_endpoint: str, process: Fid, ha_service: Fid,
profile: Profile):
LOG.debug('Starting m0_halon_interface')
self._process_fid = process
self._profile = profile
@repeat_if_fails()
def _get_rm_fid() -> Fid:
return self.consul_util.get_rm_fid()
rm_fid = _get_rm_fid()
result = self._ffi.start(self._ha_ctx, make_c_str(rpc_endpoint),
process.to_c(), ha_service.to_c(),
rm_fid.to_c())
if result:
LOG.error(
'Cannot start Motr API. m0_halon_interface::start'
' returned non-zero code (%s)', result)
raise RuntimeError('Cannot start m0_halon_interface.'
'Please check Motr logs for more details.')
def send_entrypoint_request_reply(self, message: EntrypointRequest):
reply_context = message.reply_context
req_id = message.req_id
remote_rpc_endpoint = message.remote_rpc_endpoint
process_fid = message.process_fid
e_rc = EAGAIN
LOG.debug('Processing entrypoint request from remote endpoint'
" '{}', process fid {}".format(remote_rpc_endpoint,
str(process_fid)))
sess = principal_rm = confds = None
try:
util = self.consul_util
# When stopping, there's a possibility that hax may receive
# an entrypoint request from motr land. In order to unblock
# motr land, reply with entrypoint request with no confds
# and RM endpoints as the processes might have already
# stopped.
rc_quorum = 0
rm_fid = Fid(0, 0)
if self.is_stopping:
confds = []
else:
sess = util.get_leader_session()
principal_rm = util.get_session_node(sess)
confds = util.get_confd_list()
# Hax may receive entrypoint requests multiple times during its
# lifetime. Hax starts motr rconfc to invoke spiel commands. Motr
# rconfc establishes connection with principal RM, in case of
# principal RM failure, rconfc invalidates its confc and again
# requests entrypoint in a hope that there will be another confd
# and principal RM elected so that rconfc can resume its
# functionality. During shutdown, when each motr process stops,
# including confds, hax broadcasts M0_NC_FAILED event for every
# STOPPED or FAILED motr process. Motr rconfc on receiving the
# failed events for confds, goes re-requests entrypoint information
# and this goes on in a loop. In order to break this loop, the
# the entrypoint reply must only report alive confds and rm
# endpoints. While doing this we need to handle the bootstrapping
# case, so we wait until bootstrapping is done that is all the
# motr services are up, we check the confd status and exclude
# corresponding confd from the entrypoint reply.
# EOS-25726: It seems that the confds were reported as started
# and they failed later. This could be due to a Motr issue
# EOS-25695.
# In such a case, when processes start out of order, a wrong
# quorum value is reported that leads to further issues in Motr
# process startup. Thus commenting this for now. Need to verify
# if this affects hax shutdown.
# active_confds = []
# if self.spiel_ready:
# for confd in confds:
# if not util.is_confd_failed(confd.fid):
# active_confds.append(confd)
# confds = active_confds
if confds:
rm_fid = util.get_rm_fid()
rc_quorum = int(len(confds) / 2 + 1)
rm_eps = None
for svc in confds:
if svc.node == principal_rm:
rm_eps = svc.address
break
if confds and (not self.is_stopping) and (not rm_eps):
if util.m0ds_stopping():
e_rc = 0
raise RuntimeError('No RM node found in Consul')
except Exception:
LOG.exception('Failed to get the data from Consul.'
' Replying with EAGAIN error code, with a 1'
' second delay.')
# If replied EAGAIN, motr immediately sends a subsequent entrypoint
# request and it is observed that several entrypoint requests are
# received by hare in a second. This floods Hare, as an
# intermediate solution, Hare dropped the requests in case of an
# error preparing the same. But, motr does not send any subsequent
# entrypoint requests as expected after a timeout. As per the
# discussion, it is agreed upon to have a temporary fix in Hare.
# https://jts.seagate.com/browse/EOS-27068 motr ticket is created
# to track the same.
sleep(1)
self._ffi.entrypoint_reply(reply_context, req_id.to_c(), e_rc, 0,
make_array(FidStruct, []),
make_array(c.c_char_p, []), 0,
Fid(0, 0).to_c(), None)
LOG.debug('Reply sent')
return
confd_fids = [x.fid.to_c() for x in confds]
confd_eps = [make_c_str(x.address) for x in confds]
LOG.debug('Passing the entrypoint reply to hax.c layer')
self._ffi.entrypoint_reply(reply_context, req_id.to_c(), 0,
len(confds),
make_array(FidStruct, confd_fids),
make_array(c.c_char_p,
confd_eps), rc_quorum,
rm_fid.to_c(), make_c_str(rm_eps))
LOG.debug('Entrypoint request has been replied to')
def send_entrypoint_request_reply(self, message: EntrypointRequest):
reply_context = message.reply_context
req_id = message.req_id
remote_rpc_endpoint = message.remote_rpc_endpoint
process_fid = message.process_fid
e_rc = EAGAIN
LOG.debug('Processing entrypoint request from remote endpoint'
" '{}', process fid {}".format(remote_rpc_endpoint,
str(process_fid)))
sess = principal_rm = confds = None
try:
util = self.consul_util
# When stopping, there's a possibility that hax may receive
# an entrypoint request from motr land. In order to unblock
# motr land, reply with entrypoint request with no confds
# and RM endpoints as the processes might have already
# stopped.
rc_quorum = 0
rm_fid = Fid(0, 0)
if self.is_stopping:
confds = []
else:
sess = util.get_leader_session_no_wait()
principal_rm = util.get_session_node(sess)
confds = util.get_confd_list()
# Hax may receive entrypoint requests multiple times during its
# lifetime. Hax starts motr rconfc to invoke spiel commands. Motr
# rconfc establishes connection with principal RM, in case of
# principal RM failure, rconfc invalidates its confc and again
# requests entrypoint in a hope that there will be another confd
# and principal RM elected so that rconfc can resume its
# functionality. During shutdown, when each motr process stops,
# including confds, hax broadcasts M0_NC_FAILED event for every
# STOPPED or FAILED motr process. Motr rconfc on receiving the
# failed events for confds, goes re-requests entrypoint information
# and this goes on in a loop. In order to break this loop, the
# the entrypoint reply must only report alive confds and rm
# endpoints. While doing this we need to handle the bootstrapping
# case, so we wait until bootstrapping is done that is all the
# motr services are up, we check the confd status and exclude
# corresponding confd from the entrypoint reply.
active_confds = []
if self.spiel_ready:
for confd in confds:
if not util.is_confd_failed(confd.fid):
active_confds.append(confd)
confds = active_confds
if confds:
rm_fid = util.get_rm_fid()
rc_quorum = int(len(confds) / 2 + 1)
rm_eps = None
for svc in confds:
if svc.node == principal_rm:
rm_eps = svc.address
break
if confds and (not self.is_stopping) and (not rm_eps):
if util.m0ds_stopping():
e_rc = 0
raise RuntimeError('No RM node found in Consul')
except Exception:
LOG.exception('Failed to get the data from Consul.'
' Replying with EAGAIN error code.')
self._ffi.entrypoint_reply(reply_context, req_id.to_c(), e_rc, 0,
make_array(FidStruct, []),
make_array(c.c_char_p, []), 0,
Fid(0, 0).to_c(), None)
LOG.debug('Reply sent')
return
confd_fids = [x.fid.to_c() for x in confds]
confd_eps = [make_c_str(x.address) for x in confds]
LOG.debug('Passing the entrypoint reply to hax.c layer')
self._ffi.entrypoint_reply(reply_context, req_id.to_c(), 0,
len(confds),
make_array(FidStruct, confd_fids),
make_array(c.c_char_p,
confd_eps), rc_quorum,
rm_fid.to_c(), make_c_str(rm_eps))
LOG.debug('Entrypoint request has been replied to')