mirror of
https://github.com/retspen/webvirtcloud
synced 2026-11-08 11:16:47 +00:00
f1f52aac42
Networks, Interfaces, Storages, Storage, Volume, MigrateInstance and CreateInstance were unmanaged models with no table, there only so that ModelSerializers and the new VM ModelForm could take their fields. They made content types and migrations, and their DO_NOTHING foreign keys added reverse accessors that meant nothing (Compute.host, Compute.target_host, Instance.source_host). The serializers are plain Serializers and NewVMForm a Form, field for field as the models gave them (types, lengths, required, defaults, the minimum of 1 for vCPUs, memory and disk size; the form's labels are still derived from the field names). Compared field by field before and after, the API schema changes only where the models were wrong: - no int64 bounds on the listing fields; - the interface fields lose the titles that named the wrong column (type was "Status", state "Device", mac "Forward"); - a pool's volumes is a list of objects (it was described as an integer) and a volume's allocation an integer (it was untyped). One migration per app deletes the models; none touches a table.
436 lines
15 KiB
Python
436 lines
15 KiB
Python
from computes.models import Compute
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from django.db import models
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from django.utils.functional import cached_property
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from django.utils.translation import gettext_lazy as _
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from libvirt import (
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VIR_DOMAIN_SNAPSHOT_LIST_EXTERNAL,
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VIR_DOMAIN_SNAPSHOT_LIST_INTERNAL,
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libvirtError,
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)
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from operations import claims
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from operations.models import Claim
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from vrtManager.instance import PERSISTENT_XML, wvmInstance
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class Flavor(models.Model):
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label = models.CharField(_("label"), max_length=12, unique=True)
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memory = models.IntegerField(_("memory"))
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vcpu = models.IntegerField(_("vcpu"))
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disk = models.IntegerField(_("disk"))
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def __str__(self):
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return self.label
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class InstanceManager(models.Manager):
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def get_queryset(self):
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return super().get_queryset().select_related("compute")
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class Instance(models.Model):
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compute = models.ForeignKey(Compute, on_delete=models.CASCADE)
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name = models.CharField(_("name"), max_length=120, db_index=True)
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uuid = models.CharField(_("uuid"), max_length=36, db_index=True)
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is_template = models.BooleanField(_("is template"), default=False)
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created = models.DateTimeField(_("created"), auto_now_add=True)
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drbd = models.CharField(_("drbd"), max_length=24, default="None")
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objects = InstanceManager()
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class Meta:
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constraints = [
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models.UniqueConstraint(fields=["compute", "uuid"], name="unique_compute_uuid")
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]
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def __str__(self):
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return f"{self.compute}/{self.name}"
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@cached_property
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def proxy(self):
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return wvmInstance(
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self.compute.hostname,
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self.compute.login,
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self.compute.password,
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self.compute.type,
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self.name,
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uuid=self.uuid,
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)
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@cached_property
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def media(self) -> list[dict]:
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return self.proxy.get_media_devices()
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@cached_property
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def media_iso(self) -> list[str]:
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return sorted(self.proxy.get_iso_media())
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@cached_property
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def disks(self) -> list[dict]:
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return self.proxy.get_disk_devices()
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@cached_property
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def info(self) -> list | None:
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"""virDomainGetInfo, read once: state, max memory KiB, memory KiB, vCPUs, CPU time.
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None if the VM cannot be read (host down, VM gone): lists show it as unknown."""
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try:
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return self.proxy.instance.info()
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except libvirtError:
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return None
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@cached_property
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def status(self) -> int:
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return self.proxy.get_status()
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@cached_property
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def autostart(self) -> int:
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return self.proxy.get_autostart()
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@cached_property
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def bootmenu(self) -> bool:
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return self.proxy.get_bootmenu()
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@cached_property
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def boot_order(self) -> dict:
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return self.proxy.get_bootorder()
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@cached_property
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def arch(self) -> str:
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return self.proxy.get_arch()
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@cached_property
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def machine(self) -> str:
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return self.proxy.get_machine_type()
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@cached_property
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def firmware(self) -> dict:
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return self.proxy.get_loader()
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@cached_property
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def nvram(self) -> str | None:
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return self.proxy.get_nvram()
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@cached_property
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def vcpu(self) -> int:
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return self.proxy.get_vcpu()
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@cached_property
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def vcpu_range(self):
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"""The vCPU counts the Resize tab offers, the VM's own maximum among them."""
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return self.proxy.get_max_cpus(at_least=self.config_vcpu)
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@cached_property
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def cur_vcpu(self):
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return self.proxy.get_cur_vcpu()
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@cached_property
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def vcpus(self):
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return self.proxy.get_vcpus()
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@cached_property
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def vcpu_cells(self) -> list[dict]:
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"""One cell per vCPU up to the maximum, as the Resize tab draws them:
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its id, whether it is on, and whether it can be turned off and on
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(a VM with hot-pluggable vCPUs lists them; vCPU 0 never is)."""
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if self.vcpus:
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return [{"id": id, "on": v["enabled"] == "yes", "fixed": v["hotpluggable"] != "yes"}
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for id, v in self.vcpus.items()]
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return [{"id": str(i), "on": i < self.cur_vcpu, "fixed": True} for i in range(self.vcpu)]
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@cached_property
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def get_uuid(self):
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return self.proxy.get_uuid()
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@cached_property
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def memory(self) -> int:
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return self.proxy.get_memory()
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@cached_property
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def cur_memory(self):
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return self.proxy.get_cur_memory()
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@cached_property
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def title(self) -> str:
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return self.proxy.get_title()
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@cached_property
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def description(self) -> str:
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return self.proxy.get_description()
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@cached_property
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def networks(self) -> list[dict]:
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return self.proxy.get_net_devices()
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@cached_property
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def config_networks(self) -> list[dict]:
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"""NICs of the persistent definition, which the edit and clone forms
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change; target is the running VM's device name, if any."""
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live_targets = {net["mac"]: net.get("target", "") for net in self.networks}
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networks = self.proxy.get_net_devices(config=True)
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for net in networks:
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net["target"] = live_targets.get(net["mac"], "")
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return networks
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@cached_property
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def pcie_slots(self) -> tuple[int, int] | None:
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"""(PCIe slots, free ones) the VM has now; None: not a PCIe machine."""
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return self.proxy.get_pcie_slots()
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@cached_property
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def config_pcie_slots(self) -> tuple[int, int] | None:
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"""The same at its next start, which added slots wait for while it runs."""
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return self.proxy.get_pcie_slots(config=True)
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@cached_property
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def config_disks(self) -> list[dict]:
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"""Disks of the persistent definition, which the disk list, its edit
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form and a clone use: on a running VM a pending change shows, and an
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edit does not post the live value back over it."""
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return self.proxy.get_disk_devices(config=True)
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@cached_property
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def config_vcpu(self) -> int:
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"""vCPUs of the persistent definition, which the CPU form changes."""
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return self.proxy.get_vcpu(config=True)
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@cached_property
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def config_cur_vcpu(self) -> int:
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return self.proxy.get_cur_vcpu(config=True)
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@cached_property
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def config_memory(self) -> int:
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"""Memory (MiB) of the persistent definition, which a clone starts from."""
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return self.proxy.get_memory(config=True)
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@cached_property
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def config_title(self) -> str:
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"""Title and description of the persistent definition, which the
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options form changes."""
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return self.proxy.get_title(config=True)
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@cached_property
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def config_description(self) -> str:
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return self.proxy.get_description(config=True)
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@cached_property
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def config_media(self) -> list[dict]:
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"""CD-ROMs, boot menu and boot order of the persistent definition,
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which the boot order editor changes."""
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return self.proxy.get_media_devices(config=True)
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@cached_property
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def config_bootmenu(self) -> bool:
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return self.proxy.get_bootmenu(config=True)
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@cached_property
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def config_boot_order(self) -> dict:
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return self.proxy.get_bootorder(config=True)
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@cached_property
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def config_boot_devices(self) -> list[dict]:
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"""The disks, CD-ROM drives and NICs the boot order editor lists, those
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in the boot order first in their position; value is as posted, as in
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"disk:vda"."""
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order = [f"{d['dev']}:{d['target']}" for position, d in sorted(self.config_boot_order.items())]
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devices = (
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[{"value": f"disk:{d['dev']}", "name": d["dev"], "kind": _("Disk"), "source": d["image"], "icon": "device-hdd"}
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for d in self.config_disks]
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+ [{"value": f"cdrom:{d['dev']}", "name": d["dev"], "kind": _("CD-ROM"), "source": d["image"], "icon": "disc"}
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for d in self.config_media]
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+ [{"value": f"network:{n['mac']}", "name": n["mac"], "kind": _("NIC"), "source": n["nic"], "icon": "ethernet"}
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for n in self.config_networks]
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)
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for device in devices:
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device["checked"] = device["value"] in order
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return sorted(devices, key=lambda d: order.index(d["value"]) if d["checked"] else len(order))
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@cached_property
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def config_boot_types(self) -> str:
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"""The device types the VM boots by, in turn ("disk, cdrom"), when its
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order names types rather than devices; "" otherwise."""
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if any(d["checked"] for d in self.config_boot_devices):
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return ""
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return ", ".join(b["target"] for position, b in sorted(self.config_boot_order.items()))
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@cached_property
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def config_video_model(self) -> str | None:
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"""Video model and console settings of the persistent definition,
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which their forms change."""
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return self.proxy.get_video_model(config=True)
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@cached_property
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def config_console_type(self) -> str | None:
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return self.proxy.get_console_type(config=True)
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@cached_property
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def config_console_listener_address(self) -> str:
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return self.proxy.get_console_listener_addr(config=True)
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@cached_property
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def config_console_passwd(self):
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return self.proxy.get_console_passwd(config=True)
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@cached_property
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def config_console_keymap(self) -> str:
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return self.proxy.get_console_keymap(config=True)
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@cached_property
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def telnet_port(self):
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return self.proxy.get_telnet_port()
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@cached_property
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def console_type(self) -> str | None:
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return self.proxy.get_console_type()
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@cached_property
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def console_port(self) -> str | None:
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return self.proxy.get_console_port()
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@cached_property
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def console_keymap(self) -> str:
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return self.proxy.get_console_keymap()
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@cached_property
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def console_listener_address(self) -> str:
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return self.proxy.get_console_listener_addr()
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@cached_property
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def guest_agent(self):
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return False if self.proxy.get_guest_agent() is None else True
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@cached_property
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def config_guest_agent(self) -> bool:
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"""Whether the next start has the agent channel; the agent form shows it."""
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return self.proxy.get_guest_agent(config=True) is not None
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@cached_property
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def config_vcpu_hotplug(self) -> bool:
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"""Whether the next start has hotpluggable vCPUs; the hot plug form shows it."""
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return any(vcpu["hotpluggable"] == "yes" for vcpu in self.proxy.get_vcpus(config=True).values())
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@cached_property
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def config_rng(self) -> str | None:
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return self.proxy.get_rng()
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@cached_property
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def config_tpm(self) -> str | None:
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return self.proxy.get_tpm()
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@cached_property
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def config_on_crash(self) -> str:
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return self.proxy.get_on_crash()
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@cached_property
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def guest_agent_ready(self) -> bool:
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return self.proxy.is_agent_ready()
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@cached_property
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def video_model(self) -> str | None:
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return self.proxy.get_video_model()
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@cached_property
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def video_models(self):
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return self.proxy.get_video_models(self.arch, self.machine)
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def _snapshots(self, flag):
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external = flag == VIR_DOMAIN_SNAPSHOT_LIST_EXTERNAL
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return sorted(({**snap, "external": external} for snap in self.proxy.get_snapshot(flag)),
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reverse=True, key=lambda k: k["date"])
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@cached_property
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def snapshots(self) -> list[dict]:
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"""Both kinds, the newest first; "external" tells them apart."""
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return sorted(self.internal_snapshots + self.external_snapshots, reverse=True, key=lambda k: k["date"])
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@cached_property
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def newer_than_current_snapshot(self) -> bool:
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"""Snapshots newer than the one reverted to: an external snapshot waits until they are deleted."""
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return any(snap["current"] and snap["children"] for snap in self.external_snapshots)
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@cached_property
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def internal_snapshots(self) -> list[dict]:
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return self._snapshots(VIR_DOMAIN_SNAPSHOT_LIST_INTERNAL)
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@cached_property
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def external_snapshots(self) -> list[dict]:
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return self._snapshots(VIR_DOMAIN_SNAPSHOT_LIST_EXTERNAL)
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@cached_property
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def snapshot_jobs(self) -> list[dict]:
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# only for the page; create, revert and delete query the jobs again and refuse if that fails
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try:
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return self.proxy.get_snapshot_jobs()
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except libvirtError:
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return []
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@cached_property
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def held_by_job(self) -> bool:
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# a queued job has no libvirt block job yet; a job's claim still holds the VM
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return Claim.objects.filter(resource=claims.instance_key(self.uuid), operation__isnull=False).exists()
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@cached_property
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def inst_xml(self):
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# the definition for the next start, which is the current one while the VM is off
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return self.proxy._XMLDesc(PERSISTENT_XML)
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@cached_property
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def has_managed_save_image(self):
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return self.proxy.get_managed_save_image()
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@cached_property
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def console_passwd(self):
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return self.proxy.get_console_passwd()
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@cached_property
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def cache_modes(self):
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return sorted(self.proxy.get_cache_modes().items())
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@cached_property
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def io_modes(self):
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return sorted(self.proxy.get_io_modes().items())
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@cached_property
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def discard_modes(self):
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return sorted(self.proxy.get_discard_modes().items())
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@cached_property
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def detect_zeroes_modes(self):
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return sorted(self.proxy.get_detect_zeroes_modes().items())
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@cached_property
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def formats(self):
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return self.proxy.get_image_formats()
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class InstanceTombstone(models.Model):
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"""Ownership of a VM that disappeared from its compute.
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Kept for INSTANCE_OWNERSHIP_RETENTION_DAYS so that the owners come back
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when the same UUID shows up again, on this or another compute.
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"""
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uuid = models.CharField(max_length=36, db_index=True)
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name = models.CharField(max_length=120)
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host = models.CharField(max_length=64, blank=True) # the compute's name: the compute may be deleted
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is_template = models.BooleanField(default=False)
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owners = models.JSONField(default=list) # [{"user": id, "is_change": .., "is_delete": .., "is_vnc": ..}]
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removed = models.DateTimeField(auto_now_add=True)
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def __str__(self):
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return "%s (%s)" % (self.name, self.uuid)
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class PermissionSet(models.Model):
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"""
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Dummy model for holding set of permissions we need to be automatically added by Django
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"""
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class Meta:
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default_permissions = ()
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permissions = [
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("clone_instances", "Can clone instances"),
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("passwordless_console", _("Can access console without password")),
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("view_instances", "Can view instances"),
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("snapshot_instances", "Can snapshot instances"),
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]
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managed = False
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