131 lines
4.0 KiB
Python
131 lines
4.0 KiB
Python
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import os
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import json
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import signal
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import logging
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import argparse
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from time import sleep
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from concurrent.futures import ThreadPoolExecutor
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from zhypervisor.logging import setup_logging
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from zhypervisor.machine import MachineSpec
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from pprint import pprint
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class ZHypervisorDaemon(object):
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def __init__(self, config):
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self.config = config
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self.datastores = {}
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self.machines = {}
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self.running = True
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self.init_datastores()
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self.state = ZConfig(self.datastores["default"])
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signal.signal(signal.SIGINT, self.signal_handler) # ctrl-c
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signal.signal(signal.SIGTERM, self.signal_handler) # sigterm
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def init_datastores(self):
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for name, info in self.config["datastores"].items():
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self.datastores[name] = ZDataStore(name, info["path"], info.get("init", False))
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def init_machines(self):
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for machine_info in self.state.get_machines():
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machine_id = machine_info["id"]
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self.add_machine(machine_id, machine_info["type"], machine_info["spec"])
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def add_machine(self, machine_id, machine_type, machine_spec):
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machine = MachineSpec(self, machine_id, machine_type, machine_spec)
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self.machines[machine_id] = machine
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if machine.options.get("autostart", False):
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machine.start()
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def signal_handler(self, signum, frame):
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logging.critical("Got signal {}".format(signum))
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self.stop()
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def run(self):
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# launch machines
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self.init_machines()
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# start API
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# TODO
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# Wait?
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while self.running:
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sleep(1)
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def stop(self):
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self.running = False
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with ThreadPoolExecutor(10) as pool:
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for machine_id, machine in self.machines.items():
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pool.submit(machine.stop)
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class ZDataStore(object):
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def __init__(self, name, root_path, init_ok=False):
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self.name = name
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self.root_path = root_path
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os.makedirs(self.root_path, exist_ok=True)
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try:
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metainfo_path = self.get_filepath(".datastore.json")
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assert os.path.exists(metainfo_path), "Datastore missing or not initialized! " \
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"File not found: {}".format(metainfo_path)
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except:
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if init_ok:
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with open(metainfo_path, "w") as f:
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json.dump({}, f)
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else:
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raise
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logging.info("Initialized datastore %s at %s", name, self.root_path)
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def get_filepath(self, *paths):
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return os.path.join(self.root_path, *paths)
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class ZConfig(object):
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def __init__(self, datastore):
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self.datastore = datastore
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self.machine_data_dir = self.datastore.get_filepath("machines")
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for d in [self.machine_data_dir]:
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os.makedirs(d, exist_ok=True)
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def get_machines(self):
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machines = []
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logging.info("Looking for machines in {}".format(self.machine_data_dir))
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for mach_name in os.listdir(self.machine_data_dir):
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with open(os.path.join(self.machine_data_dir, mach_name), "r") as f:
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machines.append(json.load(f))
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return machines
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def main():
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setup_logging()
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parser = argparse.ArgumentParser()
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parser.add_argument("-c", "--config", default="/etc/zd.json", help="Config file path")
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args = parser.parse_args()
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if not os.path.exists(args.config):
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logging.warning("Config does not exist, attempting to write default config")
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with open(args.config, "w") as f:
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json.dump({"nodename": "examplenode",
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"access": [("root", "toor", 0)],
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"state": "/opt/datastore/state/",
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"datastores": {
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"default": {
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"path": "/opt/datastore/machines/"
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}
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}}, f, indent=4)
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return
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with open(args.config) as f:
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config = json.load(f)
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z = ZHypervisorDaemon(config)
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z.run()
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