root / snf-cyclades-app / synnefo / logic / servers.py @ 2432c417
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# Copyright 2011, 2012, 2013 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and documentation are
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# those of the authors and should not be interpreted as representing official
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# policies, either expressed or implied, of GRNET S.A.
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import logging |
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from socket import getfqdn |
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from django import dispatch |
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from django.db import transaction |
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from django.utils import simplejson as json |
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from snf_django.lib.api import faults |
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from django.conf import settings |
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from synnefo.api import util |
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from synnefo.logic import backend, ips, utils |
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from synnefo.logic.backend_allocator import BackendAllocator |
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from synnefo.db.models import (NetworkInterface, VirtualMachine, |
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VirtualMachineMetadata, IPAddressLog, Network) |
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from vncauthproxy.client import request_forwarding as request_vnc_forwarding |
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from synnefo.logic import rapi |
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from synnefo.volume.volumes import _create_volume |
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from synnefo.volume.util import get_volume |
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from synnefo.logic import commands |
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log = logging.getLogger(__name__) |
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# server creation signal
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server_created = dispatch.Signal(providing_args=["created_vm_params"])
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@transaction.commit_on_success
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def create(userid, name, password, flavor, image_id, metadata={}, |
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personality=[], networks=None, volumes=None, |
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use_backend=None):
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# Get image information
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# TODO: Image is not mandatory if disks are specified
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image = util.get_image_dict(image_id, userid) |
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# Check that image fits into the disk
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if int(image["size"]) > (flavor.disk << 30): |
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msg = ("Flavor's disk size '%s' is smaller than the image's"
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"size '%s'" % (flavor.disk << 30, image["size"])) |
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raise faults.BadRequest(msg)
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if use_backend is None: |
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# Allocate server to a Ganeti backend
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use_backend = allocate_new_server(userid, flavor) |
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utils.check_name_length(name, VirtualMachine.VIRTUAL_MACHINE_NAME_LENGTH, |
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"Server name is too long")
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# Create the ports for the server
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ports = create_instance_ports(userid, networks) |
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# We must save the VM instance now, so that it gets a valid
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# vm.backend_vm_id.
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vm = VirtualMachine.objects.create(name=name, |
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backend=use_backend, |
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userid=userid, |
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imageid=image["id"],
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flavor=flavor, |
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operstate="BUILD")
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log.info("Created entry in DB for VM '%s'", vm)
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# Associate the ports with the server
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for index, port in enumerate(ports): |
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associate_port_with_machine(port, vm) |
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port.index = index |
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port.save() |
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# If no volumes are specified, we automatically create a volume with the
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# size of the flavor and filled with the specified image.
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if not volumes: |
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volumes = [{"source_type": "image", |
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"source_uuid": image["id"], |
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"size": flavor.disk,
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"delete_on_termination": True}] |
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assert(len(volumes) > 0), "Cannot create server without volumes" |
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if volumes[0]["source_type"] == "blank": |
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raise faults.BadRequest("Root volume cannot be blank") |
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server_volumes = [] |
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for index, vol_info in enumerate(volumes): |
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if vol_info["source_type"] == "volume": |
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uuid = vol_info["source_uuid"]
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v = get_volume(userid, uuid, for_update=True,
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exception=faults.BadRequest) |
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if v.status != "AVAILABLE": |
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raise faults.BadRequest("Cannot use volume while it is in %s" |
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" status" % v.status)
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v.delete_on_termination = vol_info["delete_on_termination"]
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v.index = index |
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v.save() |
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else:
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v = _create_volume(server=vm, user_id=userid, |
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index=index, **vol_info) |
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server_volumes.append(v) |
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for key, val in metadata.items(): |
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VirtualMachineMetadata.objects.create( |
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meta_key=key, |
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meta_value=val, |
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vm=vm) |
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# Create the server in Ganeti.
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vm = create_server(vm, ports, server_volumes, flavor, image, personality, |
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password) |
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return vm
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@transaction.commit_on_success
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def allocate_new_server(userid, flavor): |
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"""Allocate a new server to a Ganeti backend.
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Allocation is performed based on the owner of the server and the specified
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flavor. Also, backends that do not have a public IPv4 address are excluded
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from server allocation.
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This function runs inside a transaction, because after allocating the
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instance a commit must be performed in order to release all locks.
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"""
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backend_allocator = BackendAllocator() |
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use_backend = backend_allocator.allocate(userid, flavor) |
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if use_backend is None: |
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log.error("No available backend for VM with flavor %s", flavor)
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raise faults.ServiceUnavailable("No available backends") |
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return use_backend
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@commands.server_command("BUILD") |
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def create_server(vm, nics, volumes, flavor, image, personality, password): |
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# dispatch server created signal needed to trigger the 'vmapi', which
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# enriches the vm object with the 'config_url' attribute which must be
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# passed to the Ganeti job.
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# If the root volume has a provider, then inform snf-image to not fill
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# the volume with data
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image_id = image["backend_id"]
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root_volume = volumes[0]
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if root_volume.provider is not None: |
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image_id = "null"
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server_created.send(sender=vm, created_vm_params={ |
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'img_id': image_id,
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'img_passwd': password,
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'img_format': str(image['format']), |
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'img_personality': json.dumps(personality),
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'img_properties': json.dumps(image['metadata']), |
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}) |
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# send job to Ganeti
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try:
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jobID = backend.create_instance(vm, nics, volumes, flavor, image) |
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except:
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log.exception("Failed create instance '%s'", vm)
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jobID = None
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vm.operstate = "ERROR"
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vm.backendlogmsg = "Failed to send job to Ganeti."
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vm.save() |
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vm.nics.all().update(state="ERROR")
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# At this point the job is enqueued in the Ganeti backend
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vm.backendopcode = "OP_INSTANCE_CREATE"
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vm.backendjobid = jobID |
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vm.save() |
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log.info("User %s created VM %s, NICs %s, Backend %s, JobID %s",
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vm.userid, vm, nics, vm.backend, str(jobID))
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return jobID
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@commands.server_command("DESTROY") |
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def destroy(vm, shutdown_timeout=None): |
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# XXX: Workaround for race where OP_INSTANCE_REMOVE starts executing on
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# Ganeti before OP_INSTANCE_CREATE. This will be fixed when
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# OP_INSTANCE_REMOVE supports the 'depends' request attribute.
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if (vm.backendopcode == "OP_INSTANCE_CREATE" and |
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vm.backendjobstatus not in rapi.JOB_STATUS_FINALIZED and |
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backend.job_is_still_running(vm) and
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not backend.vm_exists_in_backend(vm)):
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raise faults.BuildInProgress("Server is being build") |
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log.info("Deleting VM %s", vm)
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return backend.delete_instance(vm, shutdown_timeout=shutdown_timeout)
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@commands.server_command("START") |
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def start(vm): |
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log.info("Starting VM %s", vm)
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return backend.startup_instance(vm)
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@commands.server_command("STOP") |
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def stop(vm, shutdown_timeout=None): |
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log.info("Stopping VM %s", vm)
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return backend.shutdown_instance(vm, shutdown_timeout=shutdown_timeout)
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@commands.server_command("REBOOT") |
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def reboot(vm, reboot_type, shutdown_timeout=None): |
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if reboot_type not in ("SOFT", "HARD"): |
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raise faults.BadRequest("Malformed request. Invalid reboot" |
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" type %s" % reboot_type)
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log.info("Rebooting VM %s. Type %s", vm, reboot_type)
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return backend.reboot_instance(vm, reboot_type.lower(),
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shutdown_timeout=shutdown_timeout) |
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def resize(vm, flavor): |
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action_fields = {"beparams": {"vcpus": flavor.cpu, |
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"maxmem": flavor.ram}}
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comm = commands.server_command("RESIZE", action_fields=action_fields)
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return comm(_resize)(vm, flavor)
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def _resize(vm, flavor): |
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old_flavor = vm.flavor |
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# User requested the same flavor
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if old_flavor.id == flavor.id:
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raise faults.BadRequest("Server '%s' flavor is already '%s'." |
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% (vm, flavor)) |
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# Check that resize can be performed
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if old_flavor.disk != flavor.disk:
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raise faults.BadRequest("Cannot resize instance disk.") |
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if old_flavor.disk_template != flavor.disk_template:
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raise faults.BadRequest("Cannot change instance disk template.") |
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log.info("Resizing VM from flavor '%s' to '%s", old_flavor, flavor)
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return backend.resize_instance(vm, vcpus=flavor.cpu, memory=flavor.ram)
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@commands.server_command("SET_FIREWALL_PROFILE") |
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def set_firewall_profile(vm, profile, nic): |
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log.info("Setting VM %s, NIC %s, firewall %s", vm, nic, profile)
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if profile not in [x[0] for x in NetworkInterface.FIREWALL_PROFILES]: |
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raise faults.BadRequest("Unsupported firewall profile") |
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backend.set_firewall_profile(vm, profile=profile, nic=nic) |
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return None |
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@commands.server_command("CONNECT") |
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def connect(vm, network, port=None): |
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if port is None: |
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port = _create_port(vm.userid, network) |
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associate_port_with_machine(port, vm) |
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log.info("Creating NIC %s with IPv4 Address %s", port, port.ipv4_address)
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return backend.connect_to_network(vm, port)
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@commands.server_command("DISCONNECT") |
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def disconnect(vm, nic): |
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log.info("Removing NIC %s from VM %s", nic, vm)
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return backend.disconnect_from_network(vm, nic)
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def console(vm, console_type): |
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"""Arrange for an OOB console of the specified type
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This method arranges for an OOB console of the specified type.
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Only consoles of type "vnc" are supported for now.
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It uses a running instance of vncauthproxy to setup proper
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VNC forwarding with a random password, then returns the necessary
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VNC connection info to the caller.
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"""
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log.info("Get console VM %s, type %s", vm, console_type)
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# Use RAPI to get VNC console information for this instance
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if vm.operstate != "STARTED": |
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raise faults.BadRequest('Server not in ACTIVE state.') |
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if settings.TEST:
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console_data = {'kind': 'vnc', 'host': 'ganeti_node', 'port': 1000} |
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else:
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console_data = backend.get_instance_console(vm) |
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if console_data['kind'] != 'vnc': |
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message = 'got console of kind %s, not "vnc"' % console_data['kind'] |
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raise faults.ServiceUnavailable(message)
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# Let vncauthproxy decide on the source port.
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# The alternative: static allocation, e.g.
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# sport = console_data['port'] - 1000
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sport = 0
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daddr = console_data['host']
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dport = console_data['port']
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password = util.random_password() |
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if settings.TEST:
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fwd = {'source_port': 1234, 'status': 'OK'} |
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else:
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vnc_extra_opts = settings.CYCLADES_VNCAUTHPROXY_OPTS |
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fwd = request_vnc_forwarding(sport, daddr, dport, password, |
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**vnc_extra_opts) |
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if fwd['status'] != "OK": |
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raise faults.ServiceUnavailable('vncauthproxy returned error status') |
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# Verify that the VNC server settings haven't changed
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if not settings.TEST: |
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if console_data != backend.get_instance_console(vm):
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raise faults.ServiceUnavailable('VNC Server settings changed.') |
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console = { |
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'type': 'vnc', |
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'host': getfqdn(),
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'port': fwd['source_port'], |
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'password': password}
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return console
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def rename(server, new_name): |
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"""Rename a VirtualMachine."""
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old_name = server.name |
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server.name = new_name |
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server.save() |
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log.info("Renamed server '%s' from '%s' to '%s'", server, old_name,
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new_name) |
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return server
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@transaction.commit_on_success
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def create_port(*args, **kwargs): |
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vm = kwargs.get("machine", None) |
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if vm is None and len(args) >= 3: |
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vm = args[2]
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if vm is not None: |
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if vm.nics.count() == settings.GANETI_MAX_NICS_PER_INSTANCE:
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raise faults.BadRequest("Maximum ports per server limit reached") |
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return _create_port(*args, **kwargs)
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def _create_port(userid, network, machine=None, use_ipaddress=None, |
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address=None, name="", security_groups=None, |
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device_owner=None):
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"""Create a new port on the specified network.
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Create a new Port(NetworkInterface model) on the specified Network. If
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'machine' is specified, the machine will be connected to the network using
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this port. If 'use_ipaddress' argument is specified, the port will be
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assigned this IPAddress. Otherwise, an IPv4 address from the IPv4 subnet
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will be allocated.
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"""
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if network.state != "ACTIVE": |
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raise faults.Conflict("Cannot create port while network '%s' is in" |
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" '%s' status" % (network.id, network.state))
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elif network.action == "DESTROY": |
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msg = "Cannot create port. Network %s is being deleted."
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raise faults.Conflict(msg % network.id)
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elif network.drained:
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raise faults.Conflict("Cannot create port while network %s is in" |
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" 'SNF:DRAINED' status" % network.id)
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utils.check_name_length(name, NetworkInterface.NETWORK_IFACE_NAME_LENGTH, |
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"Port name is too long")
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ipaddress = None
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if use_ipaddress is not None: |
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# Use an existing IPAddress object.
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ipaddress = use_ipaddress |
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if ipaddress and (ipaddress.network_id != network.id): |
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msg = "IP Address %s does not belong to network %s"
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raise faults.Conflict(msg % (ipaddress.address, network.id))
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else:
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# If network has IPv4 subnets, try to allocate the address that the
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# the user specified or a random one.
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if network.subnets.filter(ipversion=4).exists(): |
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ipaddress = ips.allocate_ip(network, userid=userid, |
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address=address) |
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elif address is not None: |
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raise faults.BadRequest("Address %s is not a valid IP for the" |
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" defined network subnets" % address)
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if ipaddress is not None and ipaddress.nic is not None: |
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raise faults.Conflict("IP address '%s' is already in use" % |
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ipaddress.address) |
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port = NetworkInterface.objects.create(network=network, |
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state="DOWN",
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userid=userid, |
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device_owner=None,
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name=name) |
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# add the security groups if any
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if security_groups:
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port.security_groups.add(*security_groups) |
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if ipaddress is not None: |
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# Associate IPAddress with the Port
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ipaddress.nic = port |
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ipaddress.save() |
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if machine is not None: |
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# Connect port to the instance.
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machine = connect(machine, network, port) |
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jobID = machine.task_job_id |
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log.info("Created Port %s with IP %s. Ganeti Job: %s",
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port, ipaddress, jobID) |
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else:
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log.info("Created Port %s with IP %s not attached to any instance",
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port, ipaddress) |
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return port
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def associate_port_with_machine(port, machine): |
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"""Associate a Port with a VirtualMachine.
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Associate the port with the VirtualMachine and add an entry to the
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IPAddressLog if the port has a public IPv4 address from a public network.
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"""
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if port.machine is not None: |
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raise faults.Conflict("Port %s is already in use." % port.id) |
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if port.network.public:
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ipv4_address = port.ipv4_address |
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if ipv4_address is not None: |
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ip_log = IPAddressLog.objects.create(server_id=machine.id, |
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network_id=port.network_id, |
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address=ipv4_address, |
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active=True)
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log.debug("Created IP log entry %s", ip_log)
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port.machine = machine |
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port.state = "BUILD"
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port.device_owner = "vm"
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port.save() |
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return port
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@transaction.commit_on_success
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def delete_port(port): |
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"""Delete a port by removing the NIC card from the instance.
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|
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Send a Job to remove the NIC card from the instance. The port
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will be deleted and the associated IPv4 addressess will be released
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when the job completes successfully.
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|
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"""
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|
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vm = port.machine |
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if vm is not None and not vm.deleted: |
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vm = disconnect(port.machine, port) |
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log.info("Removing port %s, Job: %s", port, vm.task_job_id)
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else:
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backend.remove_nic_ips(port) |
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port.delete() |
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log.info("Removed port %s", port)
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return port
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|
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|
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def create_instance_ports(user_id, networks=None): |
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# First connect the instance to the networks defined by the admin
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forced_ports = create_ports_for_setting(user_id, category="admin")
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if networks is None: |
491 |
# If the user did not asked for any networks, connect instance to
|
492 |
# default networks as defined by the admin
|
493 |
ports = create_ports_for_setting(user_id, category="default")
|
494 |
else:
|
495 |
# Else just connect to the networks that the user defined
|
496 |
ports = create_ports_for_request(user_id, networks) |
497 |
total_ports = forced_ports + ports |
498 |
if len(total_ports) > settings.GANETI_MAX_NICS_PER_INSTANCE: |
499 |
raise faults.BadRequest("Maximum ports per server limit reached") |
500 |
return total_ports
|
501 |
|
502 |
|
503 |
def create_ports_for_setting(user_id, category): |
504 |
if category == "admin": |
505 |
network_setting = settings.CYCLADES_FORCED_SERVER_NETWORKS |
506 |
exception = faults.ServiceUnavailable |
507 |
elif category == "default": |
508 |
network_setting = settings.CYCLADES_DEFAULT_SERVER_NETWORKS |
509 |
exception = faults.Conflict |
510 |
else:
|
511 |
raise ValueError("Unknown category: %s" % category) |
512 |
|
513 |
ports = [] |
514 |
for network_ids in network_setting: |
515 |
# Treat even simple network IDs as group of networks with one network
|
516 |
if type(network_ids) not in (list, tuple): |
517 |
network_ids = [network_ids] |
518 |
|
519 |
error_msgs = [] |
520 |
for network_id in network_ids: |
521 |
success = False
|
522 |
try:
|
523 |
ports.append(_port_from_setting(user_id, network_id, category)) |
524 |
# Port successfully created in one of the networks. Skip the
|
525 |
# the rest.
|
526 |
success = True
|
527 |
break
|
528 |
except faults.Conflict as e: |
529 |
if len(network_ids) == 1: |
530 |
raise exception(e.message)
|
531 |
else:
|
532 |
error_msgs.append(e.message) |
533 |
|
534 |
if not success: |
535 |
if category == "admin": |
536 |
log.error("Cannot connect server to forced networks '%s': %s",
|
537 |
network_ids, error_msgs) |
538 |
raise exception("Cannot connect server to forced server" |
539 |
" networks.")
|
540 |
else:
|
541 |
log.debug("Cannot connect server to default networks '%s': %s",
|
542 |
network_ids, error_msgs) |
543 |
raise exception("Cannot connect server to default server" |
544 |
" networks.")
|
545 |
|
546 |
return ports
|
547 |
|
548 |
|
549 |
def _port_from_setting(user_id, network_id, category): |
550 |
# TODO: Fix this..you need only IPv4 and only IPv6 network
|
551 |
if network_id == "SNF:ANY_PUBLIC_IPV4": |
552 |
return create_public_ipv4_port(user_id, category=category)
|
553 |
elif network_id == "SNF:ANY_PUBLIC_IPV6": |
554 |
return create_public_ipv6_port(user_id, category=category)
|
555 |
elif network_id == "SNF:ANY_PUBLIC": |
556 |
try:
|
557 |
return create_public_ipv4_port(user_id, category=category)
|
558 |
except faults.Conflict as e1: |
559 |
try:
|
560 |
return create_public_ipv6_port(user_id, category=category)
|
561 |
except faults.Conflict as e2: |
562 |
log.error("Failed to connect server to a public IPv4 or IPv6"
|
563 |
" network. IPv4: %s, IPv6: %s", e1, e2)
|
564 |
msg = ("Cannot connect server to a public IPv4 or IPv6"
|
565 |
" network.")
|
566 |
raise faults.Conflict(msg)
|
567 |
else: # Case of network ID |
568 |
if category in ["user", "default"]: |
569 |
return _port_for_request(user_id, {"uuid": network_id}) |
570 |
elif category == "admin": |
571 |
network = util.get_network(network_id, user_id, non_deleted=True)
|
572 |
return _create_port(user_id, network)
|
573 |
else:
|
574 |
raise ValueError("Unknown category: %s" % category) |
575 |
|
576 |
|
577 |
def create_public_ipv4_port(user_id, network=None, address=None, |
578 |
category="user"):
|
579 |
"""Create a port in a public IPv4 network.
|
580 |
|
581 |
Create a port in a public IPv4 network (that may also have an IPv6
|
582 |
subnet). If the category is 'user' or 'default' this will try to use
|
583 |
one of the users floating IPs. If the category is 'admin' will
|
584 |
create a port to the public network (without floating IPs or quotas).
|
585 |
|
586 |
"""
|
587 |
if category in ["user", "default"]: |
588 |
if address is None: |
589 |
ipaddress = ips.get_free_floating_ip(user_id, network) |
590 |
else:
|
591 |
ipaddress = util.get_floating_ip_by_address(user_id, address, |
592 |
for_update=True)
|
593 |
elif category == "admin": |
594 |
if network is None: |
595 |
ipaddress = ips.allocate_public_ip(user_id) |
596 |
else:
|
597 |
ipaddress = ips.allocate_ip(network, user_id) |
598 |
else:
|
599 |
raise ValueError("Unknown category: %s" % category) |
600 |
if network is None: |
601 |
network = ipaddress.network |
602 |
return _create_port(user_id, network, use_ipaddress=ipaddress)
|
603 |
|
604 |
|
605 |
def create_public_ipv6_port(user_id, category=None): |
606 |
"""Create a port in a public IPv6 only network."""
|
607 |
networks = Network.objects.filter(public=True, deleted=False, |
608 |
drained=False, subnets__ipversion=6)\ |
609 |
.exclude(subnets__ipversion=4)
|
610 |
if networks:
|
611 |
return _create_port(user_id, networks[0]) |
612 |
else:
|
613 |
msg = "No available IPv6 only network!"
|
614 |
log.error(msg) |
615 |
raise faults.Conflict(msg)
|
616 |
|
617 |
|
618 |
def create_ports_for_request(user_id, networks): |
619 |
"""Create the server ports requested by the user.
|
620 |
|
621 |
Create the ports for the new servers as requested in the 'networks'
|
622 |
attribute. The networks attribute contains either a list of network IDs
|
623 |
('uuid') or a list of ports IDs ('port'). In case of network IDs, the user
|
624 |
can also specify an IPv4 address ('fixed_ip'). In order to connect to a
|
625 |
public network, the 'fixed_ip' attribute must contain the IPv4 address of a
|
626 |
floating IP. If the network is public but the 'fixed_ip' attribute is not
|
627 |
specified, the system will automatically reserve one of the users floating
|
628 |
IPs.
|
629 |
|
630 |
"""
|
631 |
if not isinstance(networks, list): |
632 |
raise faults.BadRequest("Malformed request. Invalid 'networks' field") |
633 |
return [_port_for_request(user_id, network) for network in networks] |
634 |
|
635 |
|
636 |
def _port_for_request(user_id, network_dict): |
637 |
if not isinstance(network_dict, dict): |
638 |
raise faults.BadRequest("Malformed request. Invalid 'networks' field") |
639 |
port_id = network_dict.get("port")
|
640 |
network_id = network_dict.get("uuid")
|
641 |
if port_id is not None: |
642 |
return util.get_port(port_id, user_id, for_update=True) |
643 |
elif network_id is not None: |
644 |
address = network_dict.get("fixed_ip")
|
645 |
network = util.get_network(network_id, user_id, non_deleted=True)
|
646 |
if network.public:
|
647 |
if network.subnet4 is not None: |
648 |
if not "fixed_ip" in network_dict: |
649 |
return create_public_ipv4_port(user_id, network)
|
650 |
elif address is None: |
651 |
msg = "Cannot connect to public network"
|
652 |
raise faults.BadRequest(msg % network.id)
|
653 |
else:
|
654 |
return create_public_ipv4_port(user_id, network, address)
|
655 |
else:
|
656 |
raise faults.Forbidden("Cannot connect to IPv6 only public" |
657 |
" network %" % network.id)
|
658 |
else:
|
659 |
return _create_port(user_id, network, address=address)
|
660 |
else:
|
661 |
raise faults.BadRequest("Network 'uuid' or 'port' attribute" |
662 |
" is required.")
|