128 lines
3.8 KiB
Python
128 lines
3.8 KiB
Python
# TODO
|
|
# 1. Verify that commands successfully did what they are
|
|
# supposed to do by querying state of VM using QMP.
|
|
# 2. Implement Monitoring of VM.
|
|
|
|
|
|
# For QEMU Monitor Protocol Commands Information, See
|
|
# https://qemu.weilnetz.de/doc/qemu-doc.html#pcsys_005fmonitor
|
|
|
|
import json
|
|
import shutil
|
|
import os
|
|
import subprocess
|
|
import argparse
|
|
import qmp
|
|
|
|
from etcd3_wrapper import Etcd3Wrapper
|
|
from decouple import config
|
|
|
|
|
|
def get_vm_start_cmd(owner_dir, vm_uuid, vm=False):
|
|
vm_sock_flags = f"-qmp unix:{owner_dir}/.vm/{vm_uuid}-sock,server,nowait"
|
|
vm_start_command_flags = (
|
|
f"-boot c -net nic -net user -m 256 {vm_sock_flags} -daemonize"
|
|
)
|
|
vm_start_command = f"""qemu-system-x86_64 {owner_dir}/.vm/{vm_uuid}.raw {vm_start_command_flags}"""
|
|
if vm:
|
|
vm_start_command += " -display none"
|
|
return vm_start_command
|
|
|
|
|
|
def get_qemu_mon(sock_file):
|
|
m = qmp.QEMUMonitorProtocol(sock_file)
|
|
try:
|
|
m.connect()
|
|
except FileNotFoundError as _:
|
|
return None
|
|
return m
|
|
|
|
|
|
def main(hostname, is_vm):
|
|
client = Etcd3Wrapper()
|
|
|
|
events = client.watch_prefix("/v1/vm/")
|
|
|
|
# events = client.get_prefix("/v1/vm/")
|
|
for e in events:
|
|
e.value = json.loads(e.value)
|
|
e_hostname = e.value["hostname"]
|
|
e_status = e.value["status"]
|
|
vm_uuid = e.key.split("/")[-1]
|
|
owner_dir = f"/var/www/{e.value['owner']}"
|
|
|
|
# If it is not for me then skip it
|
|
if e_hostname != hostname:
|
|
continue
|
|
print(e_status, e)
|
|
|
|
if e_status == "SCHEDULED_DEPLOY":
|
|
image = client.get(
|
|
f"/v1/image/{e.value['image_uuid']}", value_in_json=True
|
|
)
|
|
if image:
|
|
image_uuid = e.value["image_uuid"]
|
|
print(image)
|
|
print("Creating New VM...")
|
|
|
|
os.makedirs(f"{owner_dir}/.vm", exist_ok=True)
|
|
|
|
if not os.path.isfile(f"{owner_dir}/.vm/{vm_uuid}.raw"):
|
|
shutil.copy(
|
|
f"/var/vm/{image_uuid}.raw",
|
|
f"{owner_dir}/.vm/{vm_uuid}.raw",
|
|
)
|
|
|
|
e.value["status"] = "REQUESTED_START"
|
|
client.put(e.key, json.dumps(e.value))
|
|
|
|
elif e_status == "REQUESTED_SUSPEND":
|
|
m = get_qemu_mon(f"{owner_dir}/.vm/{vm_uuid}-sock")
|
|
|
|
if m:
|
|
print("Suspending")
|
|
m.command("stop")
|
|
m.close()
|
|
e.value["status"] = "SUSPENDED"
|
|
client.put(e.key, json.dumps(e.value))
|
|
else:
|
|
print("VM Not Running")
|
|
|
|
elif e_status == "REQUESTED_RESUME":
|
|
m = get_qemu_mon(f"{owner_dir}/.vm/{vm_uuid}-sock")
|
|
if m:
|
|
print("Resuming")
|
|
|
|
m.command("cont")
|
|
m.close()
|
|
|
|
e.value["status"] = "RESUMED"
|
|
client.put(e.key, json.dumps(e.value))
|
|
else:
|
|
print("VM Not Running")
|
|
|
|
elif e_status == "REQUESTED_START":
|
|
m = get_qemu_mon(f"{owner_dir}/.vm/{vm_uuid}-sock")
|
|
if m:
|
|
m.close()
|
|
print("VM already running")
|
|
e.value["status"] = "RUNNING"
|
|
client.put(e.key, e.value, value_in_json=True)
|
|
else:
|
|
print("Starting VM")
|
|
subprocess.run(
|
|
get_vm_start_cmd(owner_dir, vm_uuid, is_vm).split(" ")
|
|
)
|
|
e.value["status"] = "RUNNING"
|
|
client.put(e.key, e.value, value_in_json=True)
|
|
else:
|
|
continue
|
|
|
|
|
|
argparser = argparse.ArgumentParser()
|
|
argparser.add_argument("hostname", help="Name of this host. e.g /v1/host/1")
|
|
argparser.add_argument("--vm", type=bool, default=False)
|
|
args = argparser.parse_args()
|
|
|
|
main(args.hostname, args.vm)
|