mirror of
https://github.com/retspen/webvirtcloud
synced 2026-11-08 11:16:47 +00:00
4556e70e47
The instance lists read each VM from libvirt while rendering. When that failed, the libvirt error replaced the whole page with the error page: one VM removed out of band, or a host that is down, took the index or a compute's instances page with it. To avoid that, both index views left out every VM of a host that was not connected, so users saw their VMs disappear. - Instance.info is None when the VM cannot be read. The row then shows the name and owners from the database, the state "Unknown", and no title, vCPU, memory or actions. - Both index views list the VMs of a host that is down. The grouped view marks the host "Not Connected" and leaves out its CPU and memory. - A compute's instances page shows the connection error, and no longer says the hypervisor has no instances when it cannot be reached. Checked against the test hosts with an unreachable compute added: both index views list its VM as unknown next to the real VMs. The first load takes 5.5 s (one bounded connection attempt), the next ones 0.1 s. The new tests fail on the previous code (VMs left out, error pages).
339 lines
10 KiB
Python
339 lines
10 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 VIR_DOMAIN_XML_SECURE, libvirtError
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from vrtManager.instance import wvmInstance
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from webvirtcloud.settings import QEMU_CONSOLE_LISTENER_ADDRESSES
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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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return self.proxy.get_max_cpus()
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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 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 config_disks(self) -> list[dict]:
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"""Disks of the persistent definition, which a clone copies."""
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return self.proxy.get_disk_devices(config=True)
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@cached_property
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def qos(self):
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return self.proxy.get_all_qos()
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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 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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@cached_property
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def snapshots(self) -> list[dict]:
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return sorted(self.proxy.get_snapshot(), reverse=True, key=lambda k: k["date"])
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@cached_property
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def external_snapshots(self):
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return sorted(self.proxy.get_external_snapshots(), reverse=True, key=lambda k: k["date"])
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@cached_property
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def inst_xml(self):
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return self.proxy._XMLDesc(VIR_DOMAIN_XML_SECURE)
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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 MigrateInstance(models.Model):
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instance = models.ForeignKey(
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Instance, related_name="source_host", on_delete=models.DO_NOTHING
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)
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target_compute = models.ForeignKey(
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Compute, related_name="target_host", on_delete=models.DO_NOTHING
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)
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live = models.BooleanField(_("Live"))
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xml_del = models.BooleanField(_("Undefine XML"), default=True)
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offline = models.BooleanField(_("Offline"))
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autoconverge = models.BooleanField(_("Auto Converge"), default=True)
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compress = models.BooleanField(_("Compress"), default=False)
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postcopy = models.BooleanField(_("Post Copy"), default=False)
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unsafe = models.BooleanField(_("Unsafe"), default=False)
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class Meta:
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managed = False
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class CreateInstance(models.Model):
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compute = models.ForeignKey(
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Compute, related_name="host", on_delete=models.DO_NOTHING
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)
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name = models.CharField(
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max_length=64,
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error_messages={"required": _("No Virtual Machine name has been entered")},
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)
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firmware = models.CharField(max_length=64)
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vcpu = models.IntegerField(
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error_messages={"required": _("No VCPU has been entered")}
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)
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vcpu_mode = models.CharField(max_length=20, blank=True)
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disk = models.IntegerField(blank=True)
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memory = models.IntegerField(
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error_messages={"required": _("No RAM size has been entered")}
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)
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networks = models.CharField(
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max_length=256,
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error_messages={"required": _("No Network pool has been choosen")},
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)
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nwfilter = models.CharField(max_length=256, blank=True)
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net_model = models.CharField(max_length=256, blank=True)
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storage = models.CharField(max_length=256, blank=True)
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template = models.CharField(max_length=256, blank=True)
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images = models.CharField(max_length=256, blank=True)
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cache_mode = models.CharField(
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max_length=16, error_messages={"required": _("Please select HDD cache mode")}
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)
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hdd_size = models.IntegerField(blank=True)
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meta_prealloc = models.BooleanField(default=False, blank=True)
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virtio = models.BooleanField(default=True)
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qemu_ga = models.BooleanField(default=False)
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mac = models.CharField(max_length=17, blank=True)
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console_pass = models.CharField(max_length=64, blank=True)
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add_cdrom = models.CharField(max_length=16)
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add_input = models.CharField(max_length=16)
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video = models.CharField(
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max_length=16, error_messages={"required": _("Please select a video driver")}
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)
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listener_addr = models.CharField(
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max_length=20, choices=QEMU_CONSOLE_LISTENER_ADDRESSES
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)
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class Meta:
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managed = False
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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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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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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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