root / snf-cyclades-app / synnefo / logic / backend.py @ 562bf712
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# Copyright 2011-2013 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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from django.conf import settings |
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from django.db import transaction |
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from datetime import datetime |
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from synnefo.db.models import (Backend, VirtualMachine, Network, |
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FloatingIP, |
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BackendNetwork, BACKEND_STATUSES, |
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pooled_rapi_client, VirtualMachineDiagnostic, |
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Flavor) |
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from synnefo.logic import utils |
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from synnefo import quotas |
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from synnefo.api.util import release_resource |
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from synnefo.util.mac2eui64 import mac2eui64 |
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from synnefo.logic.rapi import GanetiApiError |
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from logging import getLogger |
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log = getLogger(__name__) |
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_firewall_tags = { |
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'ENABLED': settings.GANETI_FIREWALL_ENABLED_TAG,
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'DISABLED': settings.GANETI_FIREWALL_DISABLED_TAG,
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'PROTECTED': settings.GANETI_FIREWALL_PROTECTED_TAG}
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_reverse_tags = dict((v.split(':')[3], k) for k, v in _firewall_tags.items()) |
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def handle_vm_quotas(vm, job_id, job_opcode, job_status, job_fields): |
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"""Handle quotas for updated VirtualMachine.
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Update quotas for the updated VirtualMachine based on the job that run on
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the Ganeti backend. If a commission has been already issued for this job,
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then this commission is just accepted or rejected based on the job status.
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Otherwise, a new commission for the given change is issued, that is also in
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force and auto-accept mode. In this case, previous commissions are
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rejected, since they reflect a previous state of the VM.
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"""
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if job_status not in ["success", "error", "canceled"]: |
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return
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# Check successful completion of a job will trigger any quotable change in
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# the VM state.
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action = utils.get_action_from_opcode(job_opcode, job_fields) |
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commission_info = quotas.get_commission_info(vm, action=action, |
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action_fields=job_fields) |
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if vm.task_job_id == job_id and vm.serial is not None: |
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# Commission for this change has already been issued. So just
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# accept/reject it. Special case is OP_INSTANCE_CREATE, which even
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# if fails, must be accepted, as the user must manually remove the
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# failed server
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serial = vm.serial |
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if job_status == "success" or job_opcode == "OP_INSTANCE_CREATE": |
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quotas.accept_serial(serial) |
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elif job_status in ["error", "canceled"]: |
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log.debug("Job %s failed. Rejecting related serial %s", job_id,
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serial) |
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quotas.reject_serial(serial) |
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vm.serial = None
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elif job_status == "success" and commission_info is not None: |
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log.debug("Expected job was %s. Processing job %s. Commission for"
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" this job: %s", vm.task_job_id, job_id, commission_info)
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# Commission for this change has not been issued, or the issued
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# commission was unaware of the current change. Reject all previous
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# commissions and create a new one in forced mode!
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previous_serial = vm.serial |
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if previous_serial and not previous_serial.resolved: |
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quotas.resolve_vm_commission(previous_serial) |
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commission_name = ("client: dispatcher, resource: %s, ganeti_job: %s"
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% (vm, job_id)) |
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serial = quotas.issue_commission(user=vm.userid, |
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source=quotas.DEFAULT_SOURCE, |
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provisions=commission_info, |
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name=commission_name, |
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force=True,
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auto_accept=True)
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# Clear VM's serial. Expected job may arrive later. However correlated
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# serial must not be accepted, since it reflects a previous VM state
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vm.serial = None
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return vm
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@transaction.commit_on_success
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def process_op_status(vm, etime, jobid, opcode, status, logmsg, nics=None, |
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beparams=None):
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"""Process a job progress notification from the backend
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Process an incoming message from the backend (currently Ganeti).
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Job notifications with a terminating status (sucess, error, or canceled),
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also update the operating state of the VM.
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"""
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# See #1492, #1031, #1111 why this line has been removed
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#if (opcode not in [x[0] for x in VirtualMachine.BACKEND_OPCODES] or
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if status not in [x[0] for x in BACKEND_STATUSES]: |
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raise VirtualMachine.InvalidBackendMsgError(opcode, status)
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vm.backendjobid = jobid |
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vm.backendjobstatus = status |
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vm.backendopcode = opcode |
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vm.backendlogmsg = logmsg |
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if status in ["queued", "waiting", "running"]: |
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vm.save() |
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return
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state_for_success = VirtualMachine.OPER_STATE_FROM_OPCODE.get(opcode) |
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# Notifications of success change the operating state
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if status == "success": |
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if state_for_success is not None: |
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vm.operstate = state_for_success |
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if beparams:
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# Change the flavor of the VM
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_process_resize(vm, beparams) |
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# Update backendtime only for jobs that have been successfully
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# completed, since only these jobs update the state of the VM. Else a
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# "race condition" may occur when a successful job (e.g.
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# OP_INSTANCE_REMOVE) completes before an error job and messages arrive
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# in reversed order.
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vm.backendtime = etime |
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if status in ["success", "error", "canceled"] and nics is not None: |
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# Update the NICs of the VM
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_process_net_status(vm, etime, nics) |
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# Special case: if OP_INSTANCE_CREATE fails --> ERROR
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if opcode == 'OP_INSTANCE_CREATE' and status in ('canceled', 'error'): |
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vm.operstate = 'ERROR'
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vm.backendtime = etime |
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elif opcode == 'OP_INSTANCE_REMOVE': |
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# Special case: OP_INSTANCE_REMOVE fails for machines in ERROR,
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# when no instance exists at the Ganeti backend.
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# See ticket #799 for all the details.
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if status == 'success' or (status == 'error' and |
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not vm_exists_in_backend(vm)):
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# VM has been deleted. Release the instance IPs
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release_instance_ips(vm, []) |
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# And delete the releated NICs (must be performed after release!)
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vm.nics.all().delete() |
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vm.deleted = True
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vm.operstate = state_for_success |
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vm.backendtime = etime |
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status = "success"
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if status in ["success", "error", "canceled"]: |
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# Job is finalized: Handle quotas/commissioning
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job_fields = {"nics": nics, "beparams": beparams} |
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vm = handle_vm_quotas(vm, job_id=jobid, job_opcode=opcode, |
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job_status=status, job_fields=job_fields) |
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# and clear task fields
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if vm.task_job_id == jobid:
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vm.task = None
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vm.task_job_id = None
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vm.save() |
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def _process_resize(vm, beparams): |
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"""Change flavor of a VirtualMachine based on new beparams."""
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old_flavor = vm.flavor |
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vcpus = beparams.get("vcpus", old_flavor.cpu)
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ram = beparams.get("maxmem", old_flavor.ram)
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if vcpus == old_flavor.cpu and ram == old_flavor.ram: |
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return
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try:
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new_flavor = Flavor.objects.get(cpu=vcpus, ram=ram, |
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disk=old_flavor.disk, |
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disk_template=old_flavor.disk_template) |
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except Flavor.DoesNotExist:
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raise Exception("Can not find flavor for VM") |
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vm.flavor = new_flavor |
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vm.save() |
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@transaction.commit_on_success
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def process_net_status(vm, etime, nics): |
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"""Wrap _process_net_status inside transaction."""
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_process_net_status(vm, etime, nics) |
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def _process_net_status(vm, etime, nics): |
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"""Process a net status notification from the backend
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Process an incoming message from the Ganeti backend,
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detailing the NIC configuration of a VM instance.
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Update the state of the VM in the DB accordingly.
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"""
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ganeti_nics = process_ganeti_nics(nics) |
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if not nics_changed(vm.nics.order_by('index'), ganeti_nics): |
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log.debug("NICs for VM %s have not changed", vm)
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return
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# Get X-Lock on backend before getting X-Lock on network IP pools, to
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# guarantee that no deadlock will occur with Backend allocator.
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Backend.objects.select_for_update().get(id=vm.backend_id) |
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# NICs have changed. Release the instance IPs
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release_instance_ips(vm, ganeti_nics) |
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# And delete the releated NICs (must be performed after release!)
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vm.nics.all().delete() |
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for nic in ganeti_nics: |
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ipv4 = nic["ipv4"]
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net = nic['network']
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if ipv4:
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net.reserve_address(ipv4) |
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nic['dirty'] = False |
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vm.nics.create(**nic) |
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# Dummy save the network, because UI uses changed-since for VMs
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# and Networks in order to show the VM NICs
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net.save() |
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vm.backendtime = etime |
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vm.save() |
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def process_ganeti_nics(ganeti_nics): |
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"""Process NIC dict from ganeti hooks."""
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new_nics = [] |
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for i, new_nic in enumerate(ganeti_nics): |
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network = new_nic.get('network', '') |
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n = str(network)
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pk = utils.id_from_network_name(n) |
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net = Network.objects.get(pk=pk) |
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# Get the new nic info
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mac = new_nic.get('mac')
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ipv4 = new_nic.get('ip')
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ipv6 = mac2eui64(mac, net.subnet6) if net.subnet6 is not None else None |
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firewall = new_nic.get('firewall')
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firewall_profile = _reverse_tags.get(firewall) |
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if not firewall_profile and net.public: |
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firewall_profile = settings.DEFAULT_FIREWALL_PROFILE |
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nic = { |
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'index': i,
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'network': net,
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'mac': mac,
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'ipv4': ipv4,
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'ipv6': ipv6,
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'firewall_profile': firewall_profile,
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'state': 'ACTIVE'} |
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new_nics.append(nic) |
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return new_nics
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def nics_changed(old_nics, new_nics): |
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"""Return True if NICs have changed in any way."""
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if len(old_nics) != len(new_nics): |
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return True |
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fields = ["ipv4", "ipv6", "mac", "firewall_profile", "index", "network"] |
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for old_nic, new_nic in zip(old_nics, new_nics): |
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for field in fields: |
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if getattr(old_nic, field) != new_nic[field]: |
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return True |
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return False |
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def release_instance_ips(vm, ganeti_nics): |
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old_addresses = set(vm.nics.values_list("network", "ipv4")) |
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new_addresses = set(map(lambda nic: (nic["network"].id, nic["ipv4"]), |
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ganeti_nics)) |
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to_release = old_addresses - new_addresses |
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for (network_id, ipv4) in to_release: |
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if ipv4:
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# Get X-Lock before searching floating IP, to exclusively search
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# and release floating IP. Otherwise you may release a floating IP
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# that has been just reserved.
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net = Network.objects.select_for_update().get(id=network_id) |
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if net.floating_ip_pool:
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try:
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floating_ip = net.floating_ips.select_for_update()\ |
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.get(ipv4=ipv4, machine=vm, |
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deleted=False)
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floating_ip.machine = None
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floating_ip.save() |
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except FloatingIP.DoesNotExist:
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net.release_address(ipv4) |
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else:
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net.release_address(ipv4) |
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@transaction.commit_on_success
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def process_network_status(back_network, etime, jobid, opcode, status, logmsg): |
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if status not in [x[0] for x in BACKEND_STATUSES]: |
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raise Network.InvalidBackendMsgError(opcode, status)
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back_network.backendjobid = jobid |
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back_network.backendjobstatus = status |
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back_network.backendopcode = opcode |
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back_network.backendlogmsg = logmsg |
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network = back_network.network |
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# Notifications of success change the operating state
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state_for_success = BackendNetwork.OPER_STATE_FROM_OPCODE.get(opcode, None)
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if status == 'success' and state_for_success is not None: |
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back_network.operstate = state_for_success |
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if status in ('canceled', 'error') and opcode == 'OP_NETWORK_ADD': |
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back_network.operstate = 'ERROR'
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back_network.backendtime = etime |
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if opcode == 'OP_NETWORK_REMOVE': |
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network_is_deleted = (status == "success")
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if network_is_deleted or (status == "error" and not |
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network_exists_in_backend(back_network)): |
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back_network.operstate = state_for_success |
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back_network.deleted = True
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back_network.backendtime = etime |
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if status == 'success': |
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back_network.backendtime = etime |
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back_network.save() |
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# Also you must update the state of the Network!!
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update_network_state(network) |
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def update_network_state(network): |
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"""Update the state of a Network based on BackendNetwork states.
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Update the state of a Network based on the operstate of the networks in the
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backends that network exists.
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The state of the network is:
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* ACTIVE: If it is 'ACTIVE' in at least one backend.
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* DELETED: If it is is 'DELETED' in all backends that have been created.
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This function also releases the resources (MAC prefix or Bridge) and the
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quotas for the network.
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"""
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if network.deleted:
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# Network has already been deleted. Just assert that state is also
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# DELETED
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if not network.state == "DELETED": |
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network.state = "DELETED"
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network.save() |
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return
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|
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backend_states = [s.operstate for s in network.backend_networks.all()] |
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if not backend_states and network.action != "DESTROY": |
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if network.state != "ACTIVE": |
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network.state = "ACTIVE"
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network.save() |
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return
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|
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# Network is deleted when all BackendNetworks go to "DELETED" operstate
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deleted = reduce(lambda x, y: x == y and "DELETED", backend_states, |
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"DELETED")
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|
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# Release the resources on the deletion of the Network
|
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if deleted:
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log.info("Network %r deleted. Releasing link %r mac_prefix %r",
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network.id, network.mac_prefix, network.link) |
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network.deleted = True
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network.state = "DELETED"
|
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if network.mac_prefix:
|
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if network.FLAVORS[network.flavor]["mac_prefix"] == "pool": |
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release_resource(res_type="mac_prefix",
|
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value=network.mac_prefix) |
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if network.link:
|
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if network.FLAVORS[network.flavor]["link"] == "pool": |
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release_resource(res_type="bridge", value=network.link)
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|
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# Issue commission
|
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if network.userid:
|
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quotas.issue_and_accept_commission(network, delete=True)
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# the above has already saved the object and committed;
|
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# a second save would override others' changes, since the
|
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# object is now unlocked
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return
|
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elif not network.public: |
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log.warning("Network %s does not have an owner!", network.id)
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network.save() |
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|
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@transaction.commit_on_success
|
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def process_network_modify(back_network, etime, jobid, opcode, status, |
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add_reserved_ips, remove_reserved_ips): |
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assert (opcode == "OP_NETWORK_SET_PARAMS") |
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if status not in [x[0] for x in BACKEND_STATUSES]: |
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raise Network.InvalidBackendMsgError(opcode, status)
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|
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back_network.backendjobid = jobid |
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back_network.backendjobstatus = status |
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back_network.opcode = opcode |
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|
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if add_reserved_ips or remove_reserved_ips: |
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net = back_network.network |
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pool = net.get_pool() |
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if add_reserved_ips:
|
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for ip in add_reserved_ips: |
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pool.reserve(ip, external=True)
|
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if remove_reserved_ips:
|
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for ip in remove_reserved_ips: |
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pool.put(ip, external=True)
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pool.save() |
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|
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if status == 'success': |
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back_network.backendtime = etime |
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back_network.save() |
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|
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|
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@transaction.commit_on_success
|
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def process_create_progress(vm, etime, progress): |
448 |
|
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percentage = int(progress)
|
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|
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# The percentage may exceed 100%, due to the way
|
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# snf-image:copy-progress tracks bytes read by image handling processes
|
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percentage = 100 if percentage > 100 else percentage |
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if percentage < 0: |
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raise ValueError("Percentage cannot be negative") |
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|
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# FIXME: log a warning here, see #1033
|
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# if last_update > percentage:
|
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# raise ValueError("Build percentage should increase monotonically " \
|
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# "(old = %d, new = %d)" % (last_update, percentage))
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|
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# This assumes that no message of type 'ganeti-create-progress' is going to
|
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# arrive once OP_INSTANCE_CREATE has succeeded for a Ganeti instance and
|
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# the instance is STARTED. What if the two messages are processed by two
|
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# separate dispatcher threads, and the 'ganeti-op-status' message for
|
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# successful creation gets processed before the 'ganeti-create-progress'
|
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# message? [vkoukis]
|
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#
|
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#if not vm.operstate == 'BUILD':
|
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# raise VirtualMachine.IllegalState("VM is not in building state")
|
471 |
|
472 |
vm.buildpercentage = percentage |
473 |
vm.backendtime = etime |
474 |
vm.save() |
475 |
|
476 |
|
477 |
@transaction.commit_on_success
|
478 |
def create_instance_diagnostic(vm, message, source, level="DEBUG", etime=None, |
479 |
details=None):
|
480 |
"""
|
481 |
Create virtual machine instance diagnostic entry.
|
482 |
|
483 |
:param vm: VirtualMachine instance to create diagnostic for.
|
484 |
:param message: Diagnostic message.
|
485 |
:param source: Diagnostic source identifier (e.g. image-helper).
|
486 |
:param level: Diagnostic level (`DEBUG`, `INFO`, `WARNING`, `ERROR`).
|
487 |
:param etime: The time the message occured (if available).
|
488 |
:param details: Additional details or debug information.
|
489 |
"""
|
490 |
VirtualMachineDiagnostic.objects.create_for_vm(vm, level, source=source, |
491 |
source_date=etime, |
492 |
message=message, |
493 |
details=details) |
494 |
|
495 |
|
496 |
def create_instance(vm, nics, flavor, image): |
497 |
"""`image` is a dictionary which should contain the keys:
|
498 |
'backend_id', 'format' and 'metadata'
|
499 |
|
500 |
metadata value should be a dictionary.
|
501 |
"""
|
502 |
|
503 |
# Handle arguments to CreateInstance() as a dictionary,
|
504 |
# initialize it based on a deployment-specific value.
|
505 |
# This enables the administrator to override deployment-specific
|
506 |
# arguments, such as the disk template to use, name of os provider
|
507 |
# and hypervisor-specific parameters at will (see Synnefo #785, #835).
|
508 |
#
|
509 |
kw = vm.backend.get_create_params() |
510 |
kw['mode'] = 'create' |
511 |
kw['name'] = vm.backend_vm_id
|
512 |
# Defined in settings.GANETI_CREATEINSTANCE_KWARGS
|
513 |
|
514 |
kw['disk_template'] = flavor.disk_template
|
515 |
kw['disks'] = [{"size": flavor.disk * 1024}] |
516 |
provider = flavor.disk_provider |
517 |
if provider:
|
518 |
kw['disks'][0]['provider'] = provider |
519 |
kw['disks'][0]['origin'] = flavor.disk_origin |
520 |
|
521 |
kw['nics'] = [{"network": nic.network.backend_id, "ip": nic.ipv4} |
522 |
for nic in nics] |
523 |
backend = vm.backend |
524 |
depend_jobs = [] |
525 |
for nic in nics: |
526 |
network = Network.objects.select_for_update().get(id=nic.network.id) |
527 |
bnet, created = BackendNetwork.objects.get_or_create(backend=backend, |
528 |
network=network) |
529 |
if bnet.operstate != "ACTIVE": |
530 |
if network.public:
|
531 |
msg = "Can not connect instance to network %s. Network is not"\
|
532 |
" ACTIVE in backend %s." % (network, backend)
|
533 |
raise Exception(msg) |
534 |
else:
|
535 |
jobs = create_network(network, backend, connect=True)
|
536 |
if isinstance(jobs, list): |
537 |
depend_jobs.extend(jobs) |
538 |
else:
|
539 |
depend_jobs.append(jobs) |
540 |
kw["depends"] = [[job, ["success", "error", "canceled"]] |
541 |
for job in depend_jobs] |
542 |
|
543 |
if vm.backend.use_hotplug():
|
544 |
kw['hotplug'] = True |
545 |
# Defined in settings.GANETI_CREATEINSTANCE_KWARGS
|
546 |
# kw['os'] = settings.GANETI_OS_PROVIDER
|
547 |
kw['ip_check'] = False |
548 |
kw['name_check'] = False |
549 |
|
550 |
# Do not specific a node explicitly, have
|
551 |
# Ganeti use an iallocator instead
|
552 |
#kw['pnode'] = rapi.GetNodes()[0]
|
553 |
|
554 |
kw['dry_run'] = settings.TEST
|
555 |
|
556 |
kw['beparams'] = {
|
557 |
'auto_balance': True, |
558 |
'vcpus': flavor.cpu,
|
559 |
'memory': flavor.ram}
|
560 |
|
561 |
kw['osparams'] = {
|
562 |
'config_url': vm.config_url,
|
563 |
# Store image id and format to Ganeti
|
564 |
'img_id': image['backend_id'], |
565 |
'img_format': image['format']} |
566 |
|
567 |
# Defined in settings.GANETI_CREATEINSTANCE_KWARGS
|
568 |
# kw['hvparams'] = dict(serial_console=False)
|
569 |
|
570 |
log.debug("Creating instance %s", utils.hide_pass(kw))
|
571 |
with pooled_rapi_client(vm) as client: |
572 |
return client.CreateInstance(**kw)
|
573 |
|
574 |
|
575 |
def delete_instance(vm): |
576 |
with pooled_rapi_client(vm) as client: |
577 |
return client.DeleteInstance(vm.backend_vm_id, dry_run=settings.TEST)
|
578 |
|
579 |
|
580 |
def reboot_instance(vm, reboot_type): |
581 |
assert reboot_type in ('soft', 'hard') |
582 |
kwargs = {"instance": vm.backend_vm_id,
|
583 |
"reboot_type": "hard"} |
584 |
# XXX: Currently shutdown_timeout parameter is not supported from the
|
585 |
# Ganeti RAPI. Until supported, we will fallback for both reboot types
|
586 |
# to the default shutdown timeout of Ganeti (120s). Note that reboot
|
587 |
# type of Ganeti job must be always hard. The 'soft' and 'hard' type
|
588 |
# of OS API is different from the one in Ganeti, and maps to
|
589 |
# 'shutdown_timeout'.
|
590 |
#if reboot_type == "hard":
|
591 |
# kwargs["shutdown_timeout"] = 0
|
592 |
if settings.TEST:
|
593 |
kwargs["dry_run"] = True |
594 |
with pooled_rapi_client(vm) as client: |
595 |
return client.RebootInstance(**kwargs)
|
596 |
|
597 |
|
598 |
def startup_instance(vm): |
599 |
with pooled_rapi_client(vm) as client: |
600 |
return client.StartupInstance(vm.backend_vm_id, dry_run=settings.TEST)
|
601 |
|
602 |
|
603 |
def shutdown_instance(vm): |
604 |
with pooled_rapi_client(vm) as client: |
605 |
return client.ShutdownInstance(vm.backend_vm_id, dry_run=settings.TEST)
|
606 |
|
607 |
|
608 |
def resize_instance(vm, vcpus, memory): |
609 |
beparams = {"vcpus": int(vcpus), |
610 |
"minmem": int(memory), |
611 |
"maxmem": int(memory)} |
612 |
with pooled_rapi_client(vm) as client: |
613 |
return client.ModifyInstance(vm.backend_vm_id, beparams=beparams)
|
614 |
|
615 |
|
616 |
def get_instance_console(vm): |
617 |
# RAPI GetInstanceConsole() returns endpoints to the vnc_bind_address,
|
618 |
# which is a cluster-wide setting, either 0.0.0.0 or 127.0.0.1, and pretty
|
619 |
# useless (see #783).
|
620 |
#
|
621 |
# Until this is fixed on the Ganeti side, construct a console info reply
|
622 |
# directly.
|
623 |
#
|
624 |
# WARNING: This assumes that VNC runs on port network_port on
|
625 |
# the instance's primary node, and is probably
|
626 |
# hypervisor-specific.
|
627 |
#
|
628 |
log.debug("Getting console for vm %s", vm)
|
629 |
|
630 |
console = {} |
631 |
console['kind'] = 'vnc' |
632 |
|
633 |
with pooled_rapi_client(vm) as client: |
634 |
i = client.GetInstance(vm.backend_vm_id) |
635 |
|
636 |
if vm.backend.hypervisor == "kvm" and i['hvparams']['serial_console']: |
637 |
raise Exception("hv parameter serial_console cannot be true") |
638 |
console['host'] = i['pnode'] |
639 |
console['port'] = i['network_port'] |
640 |
|
641 |
return console
|
642 |
|
643 |
|
644 |
def get_instance_info(vm): |
645 |
with pooled_rapi_client(vm) as client: |
646 |
return client.GetInstance(vm.backend_vm_id)
|
647 |
|
648 |
|
649 |
def vm_exists_in_backend(vm): |
650 |
try:
|
651 |
get_instance_info(vm) |
652 |
return True |
653 |
except GanetiApiError as e: |
654 |
if e.code == 404: |
655 |
return False |
656 |
raise e
|
657 |
|
658 |
|
659 |
def get_network_info(backend_network): |
660 |
with pooled_rapi_client(backend_network) as client: |
661 |
return client.GetNetwork(backend_network.network.backend_id)
|
662 |
|
663 |
|
664 |
def network_exists_in_backend(backend_network): |
665 |
try:
|
666 |
get_network_info(backend_network) |
667 |
return True |
668 |
except GanetiApiError as e: |
669 |
if e.code == 404: |
670 |
return False |
671 |
|
672 |
|
673 |
def create_network(network, backend, connect=True): |
674 |
"""Create a network in a Ganeti backend"""
|
675 |
log.debug("Creating network %s in backend %s", network, backend)
|
676 |
|
677 |
job_id = _create_network(network, backend) |
678 |
|
679 |
if connect:
|
680 |
job_ids = connect_network(network, backend, depends=[job_id]) |
681 |
return job_ids
|
682 |
else:
|
683 |
return [job_id]
|
684 |
|
685 |
|
686 |
def _create_network(network, backend): |
687 |
"""Create a network."""
|
688 |
|
689 |
network_type = network.public and 'public' or 'private' |
690 |
|
691 |
tags = network.backend_tag |
692 |
if network.dhcp:
|
693 |
tags.append('nfdhcpd')
|
694 |
|
695 |
if network.public:
|
696 |
conflicts_check = True
|
697 |
else:
|
698 |
conflicts_check = False
|
699 |
|
700 |
# Use a dummy network subnet for IPv6 only networks. Currently Ganeti does
|
701 |
# not support IPv6 only networks. To bypass this limitation, we create the
|
702 |
# network with a dummy network subnet, and make Cyclades connect instances
|
703 |
# to such networks, with address=None.
|
704 |
subnet = network.subnet |
705 |
if subnet is None: |
706 |
subnet = "10.0.0.0/24"
|
707 |
|
708 |
try:
|
709 |
bn = BackendNetwork.objects.get(network=network, backend=backend) |
710 |
mac_prefix = bn.mac_prefix |
711 |
except BackendNetwork.DoesNotExist:
|
712 |
raise Exception("BackendNetwork for network '%s' in backend '%s'" |
713 |
" does not exist" % (network.id, backend.id))
|
714 |
|
715 |
with pooled_rapi_client(backend) as client: |
716 |
return client.CreateNetwork(network_name=network.backend_id,
|
717 |
network=subnet, |
718 |
network6=network.subnet6, |
719 |
gateway=network.gateway, |
720 |
gateway6=network.gateway6, |
721 |
network_type=network_type, |
722 |
mac_prefix=mac_prefix, |
723 |
conflicts_check=conflicts_check, |
724 |
tags=tags) |
725 |
|
726 |
|
727 |
def connect_network(network, backend, depends=[], group=None): |
728 |
"""Connect a network to nodegroups."""
|
729 |
log.debug("Connecting network %s to backend %s", network, backend)
|
730 |
|
731 |
if network.public:
|
732 |
conflicts_check = True
|
733 |
else:
|
734 |
conflicts_check = False
|
735 |
|
736 |
depends = [[job, ["success", "error", "canceled"]] for job in depends] |
737 |
with pooled_rapi_client(backend) as client: |
738 |
groups = [group] if group is not None else client.GetGroups() |
739 |
job_ids = [] |
740 |
for group in groups: |
741 |
job_id = client.ConnectNetwork(network.backend_id, group, |
742 |
network.mode, network.link, |
743 |
conflicts_check, |
744 |
depends=depends) |
745 |
job_ids.append(job_id) |
746 |
return job_ids
|
747 |
|
748 |
|
749 |
def delete_network(network, backend, disconnect=True): |
750 |
log.debug("Deleting network %s from backend %s", network, backend)
|
751 |
|
752 |
depends = [] |
753 |
if disconnect:
|
754 |
depends = disconnect_network(network, backend) |
755 |
_delete_network(network, backend, depends=depends) |
756 |
|
757 |
|
758 |
def _delete_network(network, backend, depends=[]): |
759 |
depends = [[job, ["success", "error", "canceled"]] for job in depends] |
760 |
with pooled_rapi_client(backend) as client: |
761 |
return client.DeleteNetwork(network.backend_id, depends)
|
762 |
|
763 |
|
764 |
def disconnect_network(network, backend, group=None): |
765 |
log.debug("Disconnecting network %s to backend %s", network, backend)
|
766 |
|
767 |
with pooled_rapi_client(backend) as client: |
768 |
groups = [group] if group is not None else client.GetGroups() |
769 |
job_ids = [] |
770 |
for group in groups: |
771 |
job_id = client.DisconnectNetwork(network.backend_id, group) |
772 |
job_ids.append(job_id) |
773 |
return job_ids
|
774 |
|
775 |
|
776 |
def connect_to_network(vm, nic): |
777 |
network = nic.network |
778 |
backend = vm.backend |
779 |
network = Network.objects.select_for_update().get(id=network.id) |
780 |
bnet, created = BackendNetwork.objects.get_or_create(backend=backend, |
781 |
network=network) |
782 |
depend_jobs = [] |
783 |
if bnet.operstate != "ACTIVE": |
784 |
depend_jobs = create_network(network, backend, connect=True)
|
785 |
|
786 |
depends = [[job, ["success", "error", "canceled"]] for job in depend_jobs] |
787 |
|
788 |
nic = {'ip': nic.ipv4, 'network': network.backend_id} |
789 |
|
790 |
log.debug("Connecting NIC %s to VM %s", nic, vm)
|
791 |
|
792 |
kwargs = { |
793 |
"instance": vm.backend_vm_id,
|
794 |
"nics": [("add", nic)], |
795 |
"depends": depends,
|
796 |
} |
797 |
if vm.backend.use_hotplug():
|
798 |
kwargs["hotplug"] = True |
799 |
if settings.TEST:
|
800 |
kwargs["dry_run"] = True |
801 |
|
802 |
with pooled_rapi_client(vm) as client: |
803 |
return client.ModifyInstance(**kwargs)
|
804 |
|
805 |
|
806 |
def disconnect_from_network(vm, nic): |
807 |
log.debug("Removing nic of VM %s, with index %s", vm, str(nic.index)) |
808 |
|
809 |
kwargs = { |
810 |
"instance": vm.backend_vm_id,
|
811 |
"nics": [("remove", nic.index, {})], |
812 |
} |
813 |
if vm.backend.use_hotplug():
|
814 |
kwargs["hotplug"] = True |
815 |
if settings.TEST:
|
816 |
kwargs["dry_run"] = True |
817 |
|
818 |
with pooled_rapi_client(vm) as client: |
819 |
jobID = client.ModifyInstance(**kwargs) |
820 |
# If the NIC has a tag for a firewall profile it must be deleted,
|
821 |
# otherwise it may affect another NIC. XXX: Deleting the tag should
|
822 |
# depend on the removing the NIC, but currently RAPI client does not
|
823 |
# support this, this may result in clearing the firewall profile
|
824 |
# without successfully removing the NIC. This issue will be fixed with
|
825 |
# use of NIC UUIDs.
|
826 |
firewall_profile = nic.firewall_profile |
827 |
if firewall_profile and firewall_profile != "DISABLED": |
828 |
tag = _firewall_tags[firewall_profile] % nic.index |
829 |
client.DeleteInstanceTags(vm.backend_vm_id, [tag], |
830 |
dry_run=settings.TEST) |
831 |
|
832 |
return jobID
|
833 |
|
834 |
|
835 |
def set_firewall_profile(vm, profile, index=0): |
836 |
try:
|
837 |
tag = _firewall_tags[profile] % index |
838 |
except KeyError: |
839 |
raise ValueError("Unsopported Firewall Profile: %s" % profile) |
840 |
|
841 |
log.debug("Setting tag of VM %s, NIC index %d, to %s", vm, index, profile)
|
842 |
|
843 |
with pooled_rapi_client(vm) as client: |
844 |
# Delete previous firewall tags
|
845 |
old_tags = client.GetInstanceTags(vm.backend_vm_id) |
846 |
delete_tags = [(t % index) for t in _firewall_tags.values() |
847 |
if (t % index) in old_tags] |
848 |
if delete_tags:
|
849 |
client.DeleteInstanceTags(vm.backend_vm_id, delete_tags, |
850 |
dry_run=settings.TEST) |
851 |
|
852 |
if profile != "DISABLED": |
853 |
client.AddInstanceTags(vm.backend_vm_id, [tag], |
854 |
dry_run=settings.TEST) |
855 |
|
856 |
# XXX NOP ModifyInstance call to force process_net_status to run
|
857 |
# on the dispatcher
|
858 |
os_name = settings.GANETI_CREATEINSTANCE_KWARGS['os']
|
859 |
client.ModifyInstance(vm.backend_vm_id, |
860 |
os_name=os_name) |
861 |
return None |
862 |
|
863 |
|
864 |
def get_instances(backend, bulk=True): |
865 |
with pooled_rapi_client(backend) as c: |
866 |
return c.GetInstances(bulk=bulk)
|
867 |
|
868 |
|
869 |
def get_nodes(backend, bulk=True): |
870 |
with pooled_rapi_client(backend) as c: |
871 |
return c.GetNodes(bulk=bulk)
|
872 |
|
873 |
|
874 |
def get_jobs(backend, bulk=True): |
875 |
with pooled_rapi_client(backend) as c: |
876 |
return c.GetJobs(bulk=bulk)
|
877 |
|
878 |
|
879 |
def get_physical_resources(backend): |
880 |
""" Get the physical resources of a backend.
|
881 |
|
882 |
Get the resources of a backend as reported by the backend (not the db).
|
883 |
|
884 |
"""
|
885 |
nodes = get_nodes(backend, bulk=True)
|
886 |
attr = ['mfree', 'mtotal', 'dfree', 'dtotal', 'pinst_cnt', 'ctotal'] |
887 |
res = {} |
888 |
for a in attr: |
889 |
res[a] = 0
|
890 |
for n in nodes: |
891 |
# Filter out drained, offline and not vm_capable nodes since they will
|
892 |
# not take part in the vm allocation process
|
893 |
can_host_vms = n['vm_capable'] and not (n['drained'] or n['offline']) |
894 |
if can_host_vms and n['cnodes']: |
895 |
for a in attr: |
896 |
res[a] += int(n[a])
|
897 |
return res
|
898 |
|
899 |
|
900 |
def update_resources(backend, resources=None): |
901 |
""" Update the state of the backend resources in db.
|
902 |
|
903 |
"""
|
904 |
|
905 |
if not resources: |
906 |
resources = get_physical_resources(backend) |
907 |
|
908 |
backend.mfree = resources['mfree']
|
909 |
backend.mtotal = resources['mtotal']
|
910 |
backend.dfree = resources['dfree']
|
911 |
backend.dtotal = resources['dtotal']
|
912 |
backend.pinst_cnt = resources['pinst_cnt']
|
913 |
backend.ctotal = resources['ctotal']
|
914 |
backend.updated = datetime.now() |
915 |
backend.save() |
916 |
|
917 |
|
918 |
def get_memory_from_instances(backend): |
919 |
""" Get the memory that is used from instances.
|
920 |
|
921 |
Get the used memory of a backend. Note: This is different for
|
922 |
the real memory used, due to kvm's memory de-duplication.
|
923 |
|
924 |
"""
|
925 |
with pooled_rapi_client(backend) as client: |
926 |
instances = client.GetInstances(bulk=True)
|
927 |
mem = 0
|
928 |
for i in instances: |
929 |
mem += i['oper_ram']
|
930 |
return mem
|
931 |
|
932 |
##
|
933 |
## Synchronized operations for reconciliation
|
934 |
##
|
935 |
|
936 |
|
937 |
def create_network_synced(network, backend): |
938 |
result = _create_network_synced(network, backend) |
939 |
if result[0] != 'success': |
940 |
return result
|
941 |
result = connect_network_synced(network, backend) |
942 |
return result
|
943 |
|
944 |
|
945 |
def _create_network_synced(network, backend): |
946 |
with pooled_rapi_client(backend) as client: |
947 |
job = _create_network(network, backend) |
948 |
result = wait_for_job(client, job) |
949 |
return result
|
950 |
|
951 |
|
952 |
def connect_network_synced(network, backend): |
953 |
with pooled_rapi_client(backend) as client: |
954 |
for group in client.GetGroups(): |
955 |
job = client.ConnectNetwork(network.backend_id, group, |
956 |
network.mode, network.link) |
957 |
result = wait_for_job(client, job) |
958 |
if result[0] != 'success': |
959 |
return result
|
960 |
|
961 |
return result
|
962 |
|
963 |
|
964 |
def wait_for_job(client, jobid): |
965 |
result = client.WaitForJobChange(jobid, ['status', 'opresult'], None, None) |
966 |
status = result['job_info'][0] |
967 |
while status not in ['success', 'error', 'cancel']: |
968 |
result = client.WaitForJobChange(jobid, ['status', 'opresult'], |
969 |
[result], None)
|
970 |
status = result['job_info'][0] |
971 |
|
972 |
if status == 'success': |
973 |
return (status, None) |
974 |
else:
|
975 |
error = result['job_info'][1] |
976 |
return (status, error)
|