78 lines
3.1 KiB
Python
78 lines
3.1 KiB
Python
#
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# Copyright (c) 2020-2023 Wind River Systems, Inc.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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import time
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from dcmanager.common import consts
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from dcmanager.common.exceptions import StrategyStoppedException
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from dcmanager.orchestrator.states.base import BaseState
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# Max time: 10 minutes = 60 queries x 10 seconds
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DEFAULT_MAX_QUERIES = 60
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DEFAULT_SLEEP_DURATION = 10
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class LockHostState(BaseState):
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"""Orchestration state for locking a host"""
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def __init__(self, next_state, region_name, hostname):
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super(LockHostState, self).__init__(
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next_state=next_state, region_name=region_name)
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self.target_hostname = hostname
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# max time to wait (in seconds) is: sleep_duration * max_queries
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self.sleep_duration = DEFAULT_SLEEP_DURATION
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self.max_queries = DEFAULT_MAX_QUERIES
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def perform_state_action(self, strategy_step):
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"""Locks a host on the subcloud
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Returns the next state in the state machine on success.
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Any exceptions raised by this method set the strategy to FAILED.
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"""
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# Create a sysinv client on the subcloud
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sysinv_client = self.get_sysinv_client(strategy_step.subcloud.region_name)
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host = sysinv_client.get_host(self.target_hostname)
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# if the host is already in the desired state, no need for action
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if host.administrative == consts.ADMIN_LOCKED:
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msg = "Host: %s already: %s." % (self.target_hostname,
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host.administrative)
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self.info_log(strategy_step, msg)
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return self.next_state
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# Invoke the action
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# ihost_action is 'lock' and task is set to 'Locking'
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response = sysinv_client.lock_host(host.id)
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if (response.ihost_action != 'lock' or response.task != 'Locking'):
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raise Exception("Unable to lock host %s" % self.target_hostname)
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# this action is asynchronous, query until it completes or times out
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counter = 0
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while True:
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# If event handler stop has been triggered, fail the state
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if self.stopped():
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raise StrategyStoppedException()
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# query the administrative state to see if it is the new state.
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host = self.get_sysinv_client(
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strategy_step.subcloud.region_name).get_host(self.target_hostname)
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if host.administrative == consts.ADMIN_LOCKED:
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msg = "Host: %s is now: %s" % (self.target_hostname,
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host.administrative)
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self.info_log(strategy_step, msg)
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break
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counter += 1
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if counter >= self.max_queries:
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raise Exception("Timeout waiting for lock to complete. "
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"Please check sysinv.log on the subcloud "
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"for details.")
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time.sleep(self.sleep_duration)
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# If we are here, the loop broke out cleanly and the action succeeded
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# When we return from this method without throwing an exception, the
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# state machine can proceed to the next state
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return self.next_state
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