92 lines
3.4 KiB
Python
Executable File
92 lines
3.4 KiB
Python
Executable File
import argparse
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import multiprocessing as mp
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import time
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from ucloud.common.request import RequestEntry, RequestType
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from ucloud.shared import shared
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from ucloud.settings import settings
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from ucloud.common.vm import VMStatus
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from ucloud.vmm import VMM
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from os.path import join as join_path
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from . import virtualmachine, logger
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def update_heartbeat(hostname):
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"""Update Last HeartBeat Time for :param hostname: in etcd"""
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host_pool = shared.host_pool
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this_host = next(filter(lambda h: h.hostname == hostname, host_pool.hosts), None)
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while True:
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this_host.update_heartbeat()
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host_pool.put(this_host)
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time.sleep(10)
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def maintenance():
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vmm = VMM()
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running_vms = vmm.discover()
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for vm_uuid in running_vms:
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if vmm.is_running(vm_uuid) and vmm.get_status(vm_uuid) == 'running':
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vm = shared.vm_pool.get(join_path(settings['etcd']['vm_prefix'], vm_uuid))
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vm.status = VMStatus.running
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shared.vm_pool.put(vm)
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def main(hostname):
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host_pool = shared.host_pool
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host = next(filter(lambda h: h.hostname == hostname, host_pool.hosts), None)
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assert host is not None, "No such host with name = {}".format(hostname)
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try:
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heartbeat_updating_process = mp.Process(target=update_heartbeat, args=(hostname,))
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heartbeat_updating_process.start()
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except Exception as e:
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raise Exception('ucloud-host heartbeat updating mechanism is not working') from e
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for events_iterator in [
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shared.etcd_client.get_prefix(settings['etcd']['request_prefix'], value_in_json=True),
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shared.etcd_client.watch_prefix(settings['etcd']['request_prefix'], timeout=10, value_in_json=True),
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]:
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for request_event in events_iterator:
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request_event = RequestEntry(request_event)
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if request_event.type == "TIMEOUT":
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maintenance()
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if request_event.hostname == host.key:
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logger.debug("VM Request: %s", request_event)
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shared.request_pool.client.client.delete(request_event.key)
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vm_entry = shared.etcd_client.get(join_path(settings['etcd']['vm_prefix'], request_event.uuid))
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if vm_entry:
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vm = virtualmachine.VM(vm_entry)
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if request_event.type == RequestType.StartVM:
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vm.start()
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elif request_event.type == RequestType.StopVM:
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vm.stop()
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elif request_event.type == RequestType.DeleteVM:
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vm.delete()
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elif request_event.type == RequestType.InitVMMigration:
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vm.start(destination_host_key=host.key)
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elif request_event.type == RequestType.TransferVM:
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host = host_pool.get(request_event.destination_host_key)
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if host:
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vm.migrate(destination=host.hostname)
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else:
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logger.error('Host %s not found!', request_event.destination_host_key)
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else:
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logger.info("VM Entry missing")
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if __name__ == "__main__":
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argparser = argparse.ArgumentParser()
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argparser.add_argument("hostname", help="Name of this host. e.g uncloud1.ungleich.ch")
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args = argparser.parse_args()
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mp.set_start_method('spawn')
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main(args.hostname)
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