ge/python-compute
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases 1 Wiki Activity

various improvemets

Browse Source
This commit is contained in:
ge
2023-12-01 01:39:26 +03:00
parent e00979dbb8
commit dab71df3d0
15 changed files with 185 additions and 114 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
compute/instance/guest_agent.py
View File

@@ -27,7 +27,7 @@ import libvirt_qemu
from compute.exceptions import (
GuestAgentCommandNotSupportedError,
GuestAgentError,
GuestAgentTimeoutExceededError,
GuestAgentTimeoutError,
GuestAgentUnavailableError,
)
@@ -199,7 +199,7 @@ class GuestAgent:
sleep(poll_interval)
now = time()
if now - start_time > self.timeout:
raise GuestAgentTimeoutExceededError(self.timeout)
raise GuestAgentTimeoutError(self.timeout)
log.debug(
'Polling command pid=%s finished, time taken: %s seconds',
pid,

144
compute/instance/instance.py
View File

@@ -322,6 +322,8 @@ class Instance:
:param method: Method used to shutdown instance
"""
if not self.is_running():
return
methods = {
'SOFT': libvirt.VIR_DOMAIN_SHUTDOWN_GUEST_AGENT,
'NORMAL': libvirt.VIR_DOMAIN_SHUTDOWN_DEFAULT,
@@ -498,11 +500,6 @@ class Instance:
msg = f'Cannot set memory for instance={self.name} {memory=}: {e}'
raise InstanceError(msg) from e
def _get_disk_by_target(self, target: str) -> etree.Element:
xml = etree.fromstring(self.dump_xml()) # noqa: S320
child = xml.xpath(f'/domain/devices/disk/target[@dev="{target}"]')
return child[0].getparent() if child else None
def attach_device(
self, device: DeviceConfig, *, live: bool = False
) -> None:
@@ -520,7 +517,7 @@ class Instance:
else:
flags = libvirt.VIR_DOMAIN_AFFECT_CONFIG
if isinstance(device, DiskConfig): # noqa: SIM102
if self._get_disk_by_target(device.target):
if self.get_disk(device.target):
log.warning(
"Volume with target '%s' is already attached",
device.target,
@@ -545,7 +542,7 @@ class Instance:
else:
flags = libvirt.VIR_DOMAIN_AFFECT_CONFIG
if isinstance(device, DiskConfig): # noqa: SIM102
if self._get_disk_by_target(device.target) is None:
if self.get_disk(device.target) is None:
log.warning(
"Volume with target '%s' is already detached",
device.target,
@@ -553,6 +550,27 @@ class Instance:
return
self.domain.detachDeviceFlags(device.to_xml(), flags=flags)
def get_disk(self, name: str) -> DiskConfig | None:
"""
Return :class:`DiskConfig` by disk target name.
Return None if disk with specified target not found.
:param name: Disk name e.g. `vda`, `sda`, etc. This name may
not match the name of the disk inside the guest OS.
"""
xml = etree.fromstring(self.dump_xml())
child = xml.xpath(f'/domain/devices/disk/target[@dev="{name}"]')
if len(child) == 0:
return None
return DiskConfig.from_xml(child[0].getparent())
def list_disks(self) -> list[DiskConfig]:
"""Return list of attached disk devices."""
xml = etree.fromstring(self.dump_xml())
disks = xml.xpath('/domain/devices/disk')
return [DiskConfig.from_xml(disk) for disk in disks]
def detach_disk(self, name: str) -> None:
"""
Detach disk device by target name.
@@ -560,31 +578,17 @@ class Instance:
There is no ``attach_disk()`` method. Use :func:`attach_device`
with :class:`DiskConfig` as argument.
:param name: Disk name e.g. 'vda', 'sda', etc. This name may
:param name: Disk name e.g. `vda`, `sda`, etc. This name may
not match the name of the disk inside the guest OS.
"""
xml = self._get_disk_by_target(name)
if xml is None:
disk = self.get_disk(name)
if disk is None:
log.warning(
"Volume with target '%s' is already detached",
name,
)
return
disk_params = {
'disk_type': xml.get('type'),
'source': xml.find('source').get('file'),
'target': xml.find('target').get('dev'),
'readonly': False if xml.find('readonly') is None else True, # noqa: SIM211
}
for param in disk_params:
if disk_params[param] is None:
msg = (
f"Cannot detach volume with target '{name}': "
f"parameter '{param}' is not defined in libvirt XML "
'config on host.'
)
raise InstanceError(msg)
self.detach_device(DiskConfig(**disk_params), live=True)
self.detach_device(disk, live=True)
def resize_disk(
self, name: str, capacity: int, unit: units.DataUnit
@@ -592,7 +596,8 @@ class Instance:
"""
Resize attached block device.
:param name: Disk device name e.g. `vda`, `sda`, etc.
:param name: Disk name e.g. `vda`, `sda`, etc. This name may
not match the name of the disk inside the guest OS.
:param capacity: New capacity.
:param unit: Capacity unit.
"""
@@ -602,10 +607,6 @@ class Instance:
flags=libvirt.VIR_DOMAIN_BLOCK_RESIZE_BYTES,
)
def get_disks(self) -> list[DiskConfig]:
"""Return list of attached disks."""
raise NotImplementedError
def pause(self) -> None:
"""Pause instance."""
if not self.is_running():
@@ -616,31 +617,75 @@ class Instance:
"""Resume paused instance."""
self.domain.resume()
def get_ssh_keys(self, user: str) -> list[str]:
def list_ssh_keys(self, user: str) -> list[str]:
"""
Return list of SSH keys on guest for specific user.
:param user: Username.
"""
raise NotImplementedError
self.guest_agent.raise_for_commands(['guest-ssh-get-authorized-keys'])
exc = self.guest_agent.guest_exec(
path='/bin/sh',
args=[
'-c',
(
'su -c "'
'if ! [ -f ~/.ssh/authorized_keys ]; then '
'mkdir -p ~/.ssh && touch ~/.ssh/authorized_keys; '
'fi" '
f'{user}'
),
],
capture_output=True,
decode_output=True,
poll=True,
)
log.debug(exc)
try:
return self.domain.authorizedSSHKeysGet(user)
except libvirt.libvirtError as e:
raise InstanceError(e) from e
def set_ssh_keys(self, user: str, ssh_keys: list[str]) -> None:
def set_ssh_keys(
self,
user: str,
keys: list[str],
*,
remove: bool = False,
append: bool = False,
) -> None:
"""
Add SSH keys to guest for specific user.
:param user: Username.
:param ssh_keys: List of public SSH keys.
:param keys: List of authorized SSH keys.
:param append: Append keys to authorized SSH keys instead of
overriding authorized_keys file.
:param remove: Remove authorized keys listed in `keys` parameter.
"""
raise NotImplementedError
def delete_ssh_keys(self, user: str, ssh_keys: list[str]) -> None:
"""
Remove SSH keys from guest for specific user.
:param user: Username.
:param ssh_keys: List of public SSH keys.
"""
raise NotImplementedError
qemu_ga_commands = ['guest-ssh-add-authorized-keys']
if remove and append:
raise InstanceError(
"'append' and 'remove' parameters is mutually exclusive"
)
if not self.is_running():
raise InstanceError(
'Cannot add authorized SSH keys to inactive instance'
)
if append:
flags = libvirt.VIR_DOMAIN_AUTHORIZED_SSH_KEYS_SET_APPEND
elif remove:
flags = libvirt.VIR_DOMAIN_AUTHORIZED_SSH_KEYS_SET_REMOVE
qemu_ga_commands = ['guest-ssh-remove-authorized-keys']
else:
flags = 0
if keys.sort() == self.list_ssh_keys().sort():
return
self.guest_agent.raise_for_commands(qemu_ga_commands)
try:
self.domain.authorizedSSHKeysSet(user, keys, flags=flags)
except libvirt.libvirtError as e:
raise InstanceError(e) from e
def set_user_password(
self, user: str, password: str, *, encrypted: bool = False
@@ -655,10 +700,6 @@ class Instance:
:param encrypted: Set it to True if password is already encrypted.
Right encryption method depends on guest OS.
"""
if not self.guest_agent.is_available():
raise InstanceError(
'Cannot change password: guest agent is unavailable'
)
self.guest_agent.raise_for_commands(['guest-set-user-password'])
flags = libvirt.VIR_DOMAIN_PASSWORD_ENCRYPTED if encrypted else 0
self.domain.setUserPassword(user, password, flags=flags)
@@ -669,7 +710,10 @@ class Instance:
return self.domain.XMLDesc(flags)
def delete(self) -> None:
"""Undefine instance."""
# TODO @ge: delete local disks
"""Delete instance with local disks."""
self.shutdown(method='HARD')
for disk in self.list_disks():
if disk.disk_type == 'file':
volume = self.connection.storageVolLookupByPath(disk.source)
volume.delete()
self.domain.undefine()

12
compute/instance/schemas.py
View File

@@ -19,20 +19,12 @@ import re
from enum import StrEnum
from pathlib import Path
from pydantic import BaseModel, Extra, validator
from pydantic import validator
from compute.common import EntityModel
from compute.utils.units import DataUnit
class EntityModel(BaseModel):
"""Basic entity model."""
class Config:
"""Do not allow extra fields."""
extra = Extra.forbid
class CPUEmulationMode(StrEnum):
"""CPU emulation mode enumerated."""