305 lines
10 KiB
Python
Executable File
305 lines
10 KiB
Python
Executable File
# QEMU Manual
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# https://qemu.weilnetz.de/doc/qemu-doc.html
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# For QEMU Monitor Protocol Commands Information, See
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# https://qemu.weilnetz.de/doc/qemu-doc.html#pcsys_005fmonitor
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import os
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import subprocess as sp
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import ipaddress
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from string import Template
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from os.path import join as join_path
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from uncloud.common.request import RequestEntry, RequestType
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from uncloud.common.vm import VMStatus, declare_stopped
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from uncloud.common.network import create_dev, delete_network_interface
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from uncloud.common.schemas import VMSchema, NetworkSchema
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from uncloud.host import logger
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from uncloud.shared import shared
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from uncloud.common.settings import settings
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from uncloud.vmm import VMM
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from marshmallow import ValidationError
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class VM:
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def __init__(self, vm_entry):
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self.schema = VMSchema()
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self.vmm = VMM()
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self.key = vm_entry.key
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try:
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self.vm = self.schema.loads(vm_entry.value)
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except ValidationError:
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logger.exception(
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"Couldn't validate VM Entry", vm_entry.value
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)
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self.vm = None
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else:
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self.uuid = vm_entry.key.split("/")[-1]
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self.host_key = self.vm["hostname"]
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logger.debug('VM Hostname {}'.format(self.host_key))
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def get_qemu_args(self):
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command = (
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"-drive file={file},format=raw,if=virtio"
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" -device virtio-rng-pci"
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" -m {memory} -smp cores={cores},threads={threads}"
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" -name {owner}_{name}"
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).format(
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owner=self.vm["owner"],
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name=self.vm["name"],
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memory=int(self.vm["specs"]["ram"].to_MB()),
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cores=self.vm["specs"]["cpu"],
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threads=1,
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file=shared.storage_handler.qemu_path_string(self.uuid),
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)
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return command.split(" ")
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def start(self, destination_host_key=None):
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migration = False
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if destination_host_key:
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migration = True
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self.create()
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try:
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network_args = self.create_network_dev()
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except Exception as err:
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declare_stopped(self.vm)
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self.vm["log"].append("Cannot Setup Network Properly")
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logger.error("Cannot Setup Network Properly for vm %s", self.uuid, exc_info=err)
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else:
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self.vmm.start(
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uuid=self.uuid,
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migration=migration,
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*self.get_qemu_args(),
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*network_args
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)
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status = self.vmm.get_status(self.uuid)
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logger.debug('VM {} status is {}'.format(self.uuid, status))
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if status == "running":
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self.vm["status"] = VMStatus.running
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self.vm["vnc_socket"] = self.vmm.get_vnc(self.uuid)
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elif status == "inmigrate":
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r = RequestEntry.from_scratch(
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type=RequestType.TransferVM, # Transfer VM
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hostname=self.host_key, # Which VM should get this request. It is source host
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uuid=self.uuid, # uuid of VM
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destination_sock_path=join_path(
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self.vmm.socket_dir, self.uuid
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),
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destination_host_key=destination_host_key, # Where source host transfer VM
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request_prefix=settings["etcd"]["request_prefix"],
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)
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shared.request_pool.put(r)
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else:
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self.stop()
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declare_stopped(self.vm)
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logger.debug('VM {} has hostname {}'.format(self.uuid, self.vm['hostname']))
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self.sync()
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def stop(self):
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self.vmm.stop(self.uuid)
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self.delete_network_dev()
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declare_stopped(self.vm)
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self.sync()
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def migrate(self, destination_host, destination_sock_path):
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self.vmm.transfer(
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src_uuid=self.uuid,
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destination_sock_path=destination_sock_path,
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host=destination_host,
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)
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def create_network_dev(self):
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command = ""
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for network_mac_and_tap in self.vm["network"]:
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network_name, mac, tap = network_mac_and_tap
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_key = os.path.join(
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settings["etcd"]["network_prefix"],
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self.vm["owner"],
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network_name,
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)
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network = shared.etcd_client.get(_key, value_in_json=True)
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network_schema = NetworkSchema()
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try:
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network = network_schema.load(network.value)
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except ValidationError:
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continue
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if network["type"] == "vxlan":
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tap = create_vxlan_br_tap(
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_id=network["id"],
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_dev=settings["network"]["vxlan_phy_dev"],
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tap_id=tap,
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ip=network["ipv6"],
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)
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all_networks = shared.etcd_client.get_prefix(
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settings["etcd"]["network_prefix"],
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value_in_json=True,
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)
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if ipaddress.ip_network(network["ipv6"]).is_global:
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update_radvd_conf(all_networks)
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command += (
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"-netdev tap,id=vmnet{net_id},ifname={tap},script=no,downscript=no"
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" -device virtio-net-pci,netdev=vmnet{net_id},mac={mac}".format(
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tap=tap, net_id=network["id"], mac=mac
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)
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)
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if command:
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command = command.split(' ')
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return command
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def delete_network_dev(self):
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try:
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for network in self.vm["network"]:
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network_name = network[0]
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_ = network[1] # tap_mac
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tap_id = network[2]
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delete_network_interface("tap{}".format(tap_id))
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owners_vms = shared.vm_pool.by_owner(self.vm["owner"])
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owners_running_vms = shared.vm_pool.by_status(
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VMStatus.running, _vms=owners_vms
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)
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networks = map(
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lambda n: n[0],
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map(lambda vm: vm.network, owners_running_vms),
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)
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networks_in_use_by_user_vms = [vm[0] for vm in networks]
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if network_name not in networks_in_use_by_user_vms:
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network_entry = resolve_network(
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network[0], self.vm["owner"]
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)
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if network_entry:
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network_type = network_entry.value["type"]
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network_id = network_entry.value["id"]
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if network_type == "vxlan":
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delete_network_interface(
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"br{}".format(network_id)
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)
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delete_network_interface(
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"vxlan{}".format(network_id)
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)
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except Exception:
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logger.exception("Exception in network interface deletion")
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def create(self):
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if shared.storage_handler.is_vm_image_exists(self.uuid):
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# File Already exists. No Problem Continue
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logger.debug("Image for vm %s exists", self.uuid)
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else:
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if shared.storage_handler.make_vm_image(
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src=self.vm["image_uuid"], dest=self.uuid
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):
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if not shared.storage_handler.resize_vm_image(
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path=self.uuid,
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size=int(self.vm["specs"]["os-ssd"].to_MB()),
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):
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self.vm["status"] = VMStatus.error
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else:
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logger.info("New VM Created")
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def sync(self):
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shared.etcd_client.put(
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self.key, self.schema.dump(self.vm), value_in_json=True
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)
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def delete(self):
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self.stop()
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if shared.storage_handler.is_vm_image_exists(self.uuid):
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r_status = shared.storage_handler.delete_vm_image(self.uuid)
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if r_status:
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shared.etcd_client.client.delete(self.key)
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else:
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shared.etcd_client.client.delete(self.key)
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def resolve_network(network_name, network_owner):
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network = shared.etcd_client.get(
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join_path(
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settings["etcd"]["network_prefix"],
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network_owner,
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network_name,
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),
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value_in_json=True,
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)
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return network
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def create_vxlan_br_tap(_id, _dev, tap_id, ip=None):
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network_script_base = os.path.join(
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os.path.dirname(os.path.dirname(__file__)), "network"
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)
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vxlan = create_dev(
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script=os.path.join(network_script_base, "create-vxlan.sh"),
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_id=_id,
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dev=_dev,
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)
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if vxlan:
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bridge = create_dev(
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script=os.path.join(
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network_script_base, "create-bridge.sh"
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),
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_id=_id,
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dev=vxlan,
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ip=ip,
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)
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if bridge:
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tap = create_dev(
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script=os.path.join(
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network_script_base, "create-tap.sh"
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),
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_id=str(tap_id),
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dev=bridge,
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)
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if tap:
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return tap
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def update_radvd_conf(all_networks):
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network_script_base = os.path.join(
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os.path.dirname(os.path.dirname(__file__)), "network"
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)
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networks = {
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net.value["ipv6"]: net.value["id"]
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for net in all_networks
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if net.value.get("ipv6")
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and ipaddress.ip_network(net.value.get("ipv6")).is_global
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}
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radvd_template = open(
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os.path.join(network_script_base, "radvd-template.conf"), "r"
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).read()
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radvd_template = Template(radvd_template)
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content = [
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radvd_template.safe_substitute(
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bridge="br{}".format(networks[net]), prefix=net
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)
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for net in networks
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if networks.get(net)
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]
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with open("/etc/radvd.conf", "w") as radvd_conf:
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radvd_conf.writelines(content)
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try:
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sp.check_output(["systemctl", "restart", "radvd"])
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except sp.CalledProcessError:
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try:
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sp.check_output(["service", "radvd", "restart"])
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except sp.CalledProcessError as err:
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raise err.__class__(
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"Cannot start/restart radvd service", err.cmd
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) from err
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