root / snf-cyclades-app / synnefo / logic / backend.py @ e6fbada1
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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, timedelta |
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from synnefo.db.models import (Backend, VirtualMachine, Network, |
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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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NIC_FIELDS = ["state", "mac", "ipv4", "ipv6", "network", "firewall_profile"] |
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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 vm
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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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if action == "BUILD": |
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# Quotas for new VMs are automatically accepted by the API
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return vm
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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": |
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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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commission_name = ("client: dispatcher, resource: %s, ganeti_job: %s"
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% (vm, job_id)) |
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quotas.handle_resource_commission(vm, action, |
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commission_info=commission_info, |
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commission_name=commission_name, |
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force=True,
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auto_accept=True)
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log.debug("Issued new commission: %s", vm.serial)
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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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job_fields=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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if job_fields is None: |
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job_fields = {} |
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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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beparams = job_fields.get("beparams", None) |
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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
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for nic in vm.nics.all(): |
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# Release the IP
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release_nic_address(nic) |
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# And delete the NIC.
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nic.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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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=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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db_nics = dict([(nic.id, nic) for nic in vm.nics.all()]) |
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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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for nic_name in set(db_nics.keys()) | set(ganeti_nics.keys()): |
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db_nic = db_nics.get(nic_name) |
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ganeti_nic = ganeti_nics.get(nic_name) |
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if ganeti_nic is None: |
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# NIC exists in DB but not in Ganeti. If the NIC is in 'building'
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# state for more than 5 minutes, then we remove the NIC.
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# TODO: This is dangerous as the job may be stack in the queue, and
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# releasing the IP may lead to duplicate IP use.
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if nic.state != "BUILDING" or (nic.state == "BUILDING" and |
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etime > nic.created + timedelta(minutes=5)):
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release_nic_address(nic) |
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nic.delete() |
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else:
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log.warning("Ignoring recent building NIC: %s", nic)
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elif db_nic is None: |
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# NIC exists in Ganeti but not in DB
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if ganeti_nic["ipv4"]: |
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network = ganeti_nic["network"]
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network.reserve_address(ganeti_nic["ipv4"])
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vm.nics.create(**ganeti_nic) |
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elif not nics_are_equal(db_nic, ganeti_nic): |
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# Special case where the IPv4 address has changed, because you
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# need to release the old IPv4 address and reserve the new one
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if db_nic.ipv4 != ganeti_nic["ipv4"]: |
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release_nic_address(db_nic) |
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if ganeti_nic["ipv4"]: |
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ganeti_nic["network"].reserve_address(ganeti_nic["ipv4"]) |
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# Update the NIC in DB with the values from Ganeti NIC
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[setattr(db_nic, f, ganeti_nic[f]) for f in NIC_FIELDS] |
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db_nic.save() |
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# Dummy update the network, to work with 'changed-since'
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db_nic.network.save() |
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vm.backendtime = etime |
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vm.save() |
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def nics_are_equal(db_nic, gnt_nic): |
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for field in NIC_FIELDS: |
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if getattr(db_nic, field) != gnt_nic[field]: |
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return False |
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return True |
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def process_ganeti_nics(ganeti_nics): |
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"""Process NIC dict from ganeti"""
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new_nics = [] |
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for index, gnic in enumerate(ganeti_nics): |
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nic_name = gnic.get("name", None) |
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if nic_name is not None: |
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nic_id = utils.id_from_nic_name(nic_name) |
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else:
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# Put as default value the index. If it is an unknown NIC to
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# synnefo it will be created automaticaly.
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nic_id = "unknown-" + str(index) |
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network_name = gnic.get('network', '') |
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network_id = utils.id_from_network_name(network_name) |
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network = Network.objects.get(id=network_id) |
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# Get the new nic info
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mac = gnic.get('mac')
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ipv4 = gnic.get('ip')
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ipv6 = mac2eui64(mac, network.subnet6)\ |
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if network.subnet6 is not None else None |
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firewall = gnic.get('firewall')
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firewall_profile = _reverse_tags.get(firewall) |
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if not firewall_profile and network.public: |
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firewall_profile = settings.DEFAULT_FIREWALL_PROFILE |
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nic_info = { |
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'index': index,
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'network': network,
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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_id, nic_info)) |
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return dict(new_nics) |
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def release_nic_address(nic): |
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"""Release the IPv4 address of a NIC.
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Check if an instance's NIC has an IPv4 address and release it if it is not
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a Floating IP.
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"""
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if nic.ipv4 and not nic.ip_type == "FLOATING": |
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nic.network.release_address(nic.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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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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job_fields): |
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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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back_network.backendjobid = jobid |
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back_network.backendjobstatus = status |
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back_network.opcode = opcode |
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add_reserved_ips = job_fields.get("add_reserved_ips")
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if add_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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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): |
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|
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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
|
471 |
# the instance is STARTED. What if the two messages are processed by two
|
472 |
# separate dispatcher threads, and the 'ganeti-op-status' message for
|
473 |
# successful creation gets processed before the 'ganeti-create-progress'
|
474 |
# message? [vkoukis]
|
475 |
#
|
476 |
#if not vm.operstate == 'BUILD':
|
477 |
# raise VirtualMachine.IllegalState("VM is not in building state")
|
478 |
|
479 |
vm.buildpercentage = percentage |
480 |
vm.backendtime = etime |
481 |
vm.save() |
482 |
|
483 |
|
484 |
@transaction.commit_on_success
|
485 |
def create_instance_diagnostic(vm, message, source, level="DEBUG", etime=None, |
486 |
details=None):
|
487 |
"""
|
488 |
Create virtual machine instance diagnostic entry.
|
489 |
|
490 |
:param vm: VirtualMachine instance to create diagnostic for.
|
491 |
:param message: Diagnostic message.
|
492 |
:param source: Diagnostic source identifier (e.g. image-helper).
|
493 |
:param level: Diagnostic level (`DEBUG`, `INFO`, `WARNING`, `ERROR`).
|
494 |
:param etime: The time the message occured (if available).
|
495 |
:param details: Additional details or debug information.
|
496 |
"""
|
497 |
VirtualMachineDiagnostic.objects.create_for_vm(vm, level, source=source, |
498 |
source_date=etime, |
499 |
message=message, |
500 |
details=details) |
501 |
|
502 |
|
503 |
def create_instance(vm, nics, flavor, image): |
504 |
"""`image` is a dictionary which should contain the keys:
|
505 |
'backend_id', 'format' and 'metadata'
|
506 |
|
507 |
metadata value should be a dictionary.
|
508 |
"""
|
509 |
|
510 |
# Handle arguments to CreateInstance() as a dictionary,
|
511 |
# initialize it based on a deployment-specific value.
|
512 |
# This enables the administrator to override deployment-specific
|
513 |
# arguments, such as the disk template to use, name of os provider
|
514 |
# and hypervisor-specific parameters at will (see Synnefo #785, #835).
|
515 |
#
|
516 |
kw = vm.backend.get_create_params() |
517 |
kw['mode'] = 'create' |
518 |
kw['name'] = vm.backend_vm_id
|
519 |
# Defined in settings.GANETI_CREATEINSTANCE_KWARGS
|
520 |
|
521 |
kw['disk_template'] = flavor.disk_template
|
522 |
kw['disks'] = [{"size": flavor.disk * 1024}] |
523 |
provider = flavor.disk_provider |
524 |
if provider:
|
525 |
kw['disks'][0]['provider'] = provider |
526 |
kw['disks'][0]['origin'] = flavor.disk_origin |
527 |
|
528 |
kw['nics'] = [{"name": nic.backend_uuid, |
529 |
"network": nic.network.backend_id,
|
530 |
"ip": nic.ipv4}
|
531 |
for nic in nics] |
532 |
backend = vm.backend |
533 |
depend_jobs = [] |
534 |
for nic in nics: |
535 |
network = Network.objects.select_for_update().get(id=nic.network.id) |
536 |
bnet, created = BackendNetwork.objects.get_or_create(backend=backend, |
537 |
network=network) |
538 |
if bnet.operstate != "ACTIVE": |
539 |
if network.public:
|
540 |
msg = "Can not connect instance to network %s. Network is not"\
|
541 |
" ACTIVE in backend %s." % (network, backend)
|
542 |
raise Exception(msg) |
543 |
else:
|
544 |
jobs = create_network(network, backend, connect=True)
|
545 |
if isinstance(jobs, list): |
546 |
depend_jobs.extend(jobs) |
547 |
else:
|
548 |
depend_jobs.append(jobs) |
549 |
kw["depends"] = [[job, ["success", "error", "canceled"]] |
550 |
for job in depend_jobs] |
551 |
|
552 |
# Defined in settings.GANETI_CREATEINSTANCE_KWARGS
|
553 |
# kw['os'] = settings.GANETI_OS_PROVIDER
|
554 |
kw['ip_check'] = False |
555 |
kw['name_check'] = False |
556 |
|
557 |
# Do not specific a node explicitly, have
|
558 |
# Ganeti use an iallocator instead
|
559 |
#kw['pnode'] = rapi.GetNodes()[0]
|
560 |
|
561 |
kw['dry_run'] = settings.TEST
|
562 |
|
563 |
kw['beparams'] = {
|
564 |
'auto_balance': True, |
565 |
'vcpus': flavor.cpu,
|
566 |
'memory': flavor.ram}
|
567 |
|
568 |
kw['osparams'] = {
|
569 |
'config_url': vm.config_url,
|
570 |
# Store image id and format to Ganeti
|
571 |
'img_id': image['backend_id'], |
572 |
'img_format': image['format']} |
573 |
|
574 |
# Use opportunistic locking
|
575 |
kw['opportunistic_locking'] = True |
576 |
|
577 |
# Defined in settings.GANETI_CREATEINSTANCE_KWARGS
|
578 |
# kw['hvparams'] = dict(serial_console=False)
|
579 |
|
580 |
log.debug("Creating instance %s", utils.hide_pass(kw))
|
581 |
with pooled_rapi_client(vm) as client: |
582 |
return client.CreateInstance(**kw)
|
583 |
|
584 |
|
585 |
def delete_instance(vm): |
586 |
with pooled_rapi_client(vm) as client: |
587 |
return client.DeleteInstance(vm.backend_vm_id, dry_run=settings.TEST)
|
588 |
|
589 |
|
590 |
def reboot_instance(vm, reboot_type): |
591 |
assert reboot_type in ('soft', 'hard') |
592 |
kwargs = {"instance": vm.backend_vm_id,
|
593 |
"reboot_type": "hard"} |
594 |
# XXX: Currently shutdown_timeout parameter is not supported from the
|
595 |
# Ganeti RAPI. Until supported, we will fallback for both reboot types
|
596 |
# to the default shutdown timeout of Ganeti (120s). Note that reboot
|
597 |
# type of Ganeti job must be always hard. The 'soft' and 'hard' type
|
598 |
# of OS API is different from the one in Ganeti, and maps to
|
599 |
# 'shutdown_timeout'.
|
600 |
#if reboot_type == "hard":
|
601 |
# kwargs["shutdown_timeout"] = 0
|
602 |
if settings.TEST:
|
603 |
kwargs["dry_run"] = True |
604 |
with pooled_rapi_client(vm) as client: |
605 |
return client.RebootInstance(**kwargs)
|
606 |
|
607 |
|
608 |
def startup_instance(vm): |
609 |
with pooled_rapi_client(vm) as client: |
610 |
return client.StartupInstance(vm.backend_vm_id, dry_run=settings.TEST)
|
611 |
|
612 |
|
613 |
def shutdown_instance(vm): |
614 |
with pooled_rapi_client(vm) as client: |
615 |
return client.ShutdownInstance(vm.backend_vm_id, dry_run=settings.TEST)
|
616 |
|
617 |
|
618 |
def resize_instance(vm, vcpus, memory): |
619 |
beparams = {"vcpus": int(vcpus), |
620 |
"minmem": int(memory), |
621 |
"maxmem": int(memory)} |
622 |
with pooled_rapi_client(vm) as client: |
623 |
return client.ModifyInstance(vm.backend_vm_id, beparams=beparams)
|
624 |
|
625 |
|
626 |
def get_instance_console(vm): |
627 |
# RAPI GetInstanceConsole() returns endpoints to the vnc_bind_address,
|
628 |
# which is a cluster-wide setting, either 0.0.0.0 or 127.0.0.1, and pretty
|
629 |
# useless (see #783).
|
630 |
#
|
631 |
# Until this is fixed on the Ganeti side, construct a console info reply
|
632 |
# directly.
|
633 |
#
|
634 |
# WARNING: This assumes that VNC runs on port network_port on
|
635 |
# the instance's primary node, and is probably
|
636 |
# hypervisor-specific.
|
637 |
#
|
638 |
log.debug("Getting console for vm %s", vm)
|
639 |
|
640 |
console = {} |
641 |
console['kind'] = 'vnc' |
642 |
|
643 |
with pooled_rapi_client(vm) as client: |
644 |
i = client.GetInstance(vm.backend_vm_id) |
645 |
|
646 |
if vm.backend.hypervisor == "kvm" and i['hvparams']['serial_console']: |
647 |
raise Exception("hv parameter serial_console cannot be true") |
648 |
console['host'] = i['pnode'] |
649 |
console['port'] = i['network_port'] |
650 |
|
651 |
return console
|
652 |
|
653 |
|
654 |
def get_instance_info(vm): |
655 |
with pooled_rapi_client(vm) as client: |
656 |
return client.GetInstance(vm.backend_vm_id)
|
657 |
|
658 |
|
659 |
def vm_exists_in_backend(vm): |
660 |
try:
|
661 |
get_instance_info(vm) |
662 |
return True |
663 |
except GanetiApiError as e: |
664 |
if e.code == 404: |
665 |
return False |
666 |
raise e
|
667 |
|
668 |
|
669 |
def get_network_info(backend_network): |
670 |
with pooled_rapi_client(backend_network) as client: |
671 |
return client.GetNetwork(backend_network.network.backend_id)
|
672 |
|
673 |
|
674 |
def network_exists_in_backend(backend_network): |
675 |
try:
|
676 |
get_network_info(backend_network) |
677 |
return True |
678 |
except GanetiApiError as e: |
679 |
if e.code == 404: |
680 |
return False |
681 |
|
682 |
|
683 |
def create_network(network, backend, connect=True): |
684 |
"""Create a network in a Ganeti backend"""
|
685 |
log.debug("Creating network %s in backend %s", network, backend)
|
686 |
|
687 |
job_id = _create_network(network, backend) |
688 |
|
689 |
if connect:
|
690 |
job_ids = connect_network(network, backend, depends=[job_id]) |
691 |
return job_ids
|
692 |
else:
|
693 |
return [job_id]
|
694 |
|
695 |
|
696 |
def _create_network(network, backend): |
697 |
"""Create a network."""
|
698 |
|
699 |
tags = network.backend_tag |
700 |
if network.dhcp:
|
701 |
tags.append('nfdhcpd')
|
702 |
|
703 |
if network.public:
|
704 |
conflicts_check = True
|
705 |
tags.append('public')
|
706 |
else:
|
707 |
conflicts_check = False
|
708 |
tags.append('private')
|
709 |
|
710 |
# Use a dummy network subnet for IPv6 only networks. Currently Ganeti does
|
711 |
# not support IPv6 only networks. To bypass this limitation, we create the
|
712 |
# network with a dummy network subnet, and make Cyclades connect instances
|
713 |
# to such networks, with address=None.
|
714 |
subnet = network.subnet |
715 |
if subnet is None: |
716 |
subnet = "10.0.0.0/24"
|
717 |
|
718 |
try:
|
719 |
bn = BackendNetwork.objects.get(network=network, backend=backend) |
720 |
mac_prefix = bn.mac_prefix |
721 |
except BackendNetwork.DoesNotExist:
|
722 |
raise Exception("BackendNetwork for network '%s' in backend '%s'" |
723 |
" does not exist" % (network.id, backend.id))
|
724 |
|
725 |
with pooled_rapi_client(backend) as client: |
726 |
return client.CreateNetwork(network_name=network.backend_id,
|
727 |
network=subnet, |
728 |
network6=network.subnet6, |
729 |
gateway=network.gateway, |
730 |
gateway6=network.gateway6, |
731 |
mac_prefix=mac_prefix, |
732 |
conflicts_check=conflicts_check, |
733 |
tags=tags) |
734 |
|
735 |
|
736 |
def connect_network(network, backend, depends=[], group=None): |
737 |
"""Connect a network to nodegroups."""
|
738 |
log.debug("Connecting network %s to backend %s", network, backend)
|
739 |
|
740 |
if network.public:
|
741 |
conflicts_check = True
|
742 |
else:
|
743 |
conflicts_check = False
|
744 |
|
745 |
depends = [[job, ["success", "error", "canceled"]] for job in depends] |
746 |
with pooled_rapi_client(backend) as client: |
747 |
groups = [group] if group is not None else client.GetGroups() |
748 |
job_ids = [] |
749 |
for group in groups: |
750 |
job_id = client.ConnectNetwork(network.backend_id, group, |
751 |
network.mode, network.link, |
752 |
conflicts_check, |
753 |
depends=depends) |
754 |
job_ids.append(job_id) |
755 |
return job_ids
|
756 |
|
757 |
|
758 |
def delete_network(network, backend, disconnect=True): |
759 |
log.debug("Deleting network %s from backend %s", network, backend)
|
760 |
|
761 |
depends = [] |
762 |
if disconnect:
|
763 |
depends = disconnect_network(network, backend) |
764 |
_delete_network(network, backend, depends=depends) |
765 |
|
766 |
|
767 |
def _delete_network(network, backend, depends=[]): |
768 |
depends = [[job, ["success", "error", "canceled"]] for job in depends] |
769 |
with pooled_rapi_client(backend) as client: |
770 |
return client.DeleteNetwork(network.backend_id, depends)
|
771 |
|
772 |
|
773 |
def disconnect_network(network, backend, group=None): |
774 |
log.debug("Disconnecting network %s to backend %s", network, backend)
|
775 |
|
776 |
with pooled_rapi_client(backend) as client: |
777 |
groups = [group] if group is not None else client.GetGroups() |
778 |
job_ids = [] |
779 |
for group in groups: |
780 |
job_id = client.DisconnectNetwork(network.backend_id, group) |
781 |
job_ids.append(job_id) |
782 |
return job_ids
|
783 |
|
784 |
|
785 |
def connect_to_network(vm, nic): |
786 |
network = nic.network |
787 |
backend = vm.backend |
788 |
network = Network.objects.select_for_update().get(id=network.id) |
789 |
bnet, created = BackendNetwork.objects.get_or_create(backend=backend, |
790 |
network=network) |
791 |
depend_jobs = [] |
792 |
if bnet.operstate != "ACTIVE": |
793 |
depend_jobs = create_network(network, backend, connect=True)
|
794 |
|
795 |
depends = [[job, ["success", "error", "canceled"]] for job in depend_jobs] |
796 |
|
797 |
nic = {'name': nic.backend_uuid,
|
798 |
'network': network.backend_id,
|
799 |
'ip': nic.ipv4}
|
800 |
|
801 |
log.debug("Adding NIC %s to VM %s", nic, vm)
|
802 |
|
803 |
kwargs = { |
804 |
"instance": vm.backend_vm_id,
|
805 |
"nics": [("add", "-1", nic)], |
806 |
"depends": depends,
|
807 |
} |
808 |
if vm.backend.use_hotplug():
|
809 |
kwargs["hotplug"] = True |
810 |
if settings.TEST:
|
811 |
kwargs["dry_run"] = True |
812 |
|
813 |
with pooled_rapi_client(vm) as client: |
814 |
return client.ModifyInstance(**kwargs)
|
815 |
|
816 |
|
817 |
def disconnect_from_network(vm, nic): |
818 |
log.debug("Removing NIC %s of VM %s", nic, vm)
|
819 |
|
820 |
kwargs = { |
821 |
"instance": vm.backend_vm_id,
|
822 |
"nics": [("remove", nic.index, {})], |
823 |
} |
824 |
if vm.backend.use_hotplug():
|
825 |
kwargs["hotplug"] = True |
826 |
if settings.TEST:
|
827 |
kwargs["dry_run"] = True |
828 |
|
829 |
with pooled_rapi_client(vm) as client: |
830 |
jobID = client.ModifyInstance(**kwargs) |
831 |
# If the NIC has a tag for a firewall profile it must be deleted,
|
832 |
# otherwise it may affect another NIC. XXX: Deleting the tag should
|
833 |
# depend on the removing the NIC, but currently RAPI client does not
|
834 |
# support this, this may result in clearing the firewall profile
|
835 |
# without successfully removing the NIC. This issue will be fixed with
|
836 |
# use of NIC UUIDs.
|
837 |
firewall_profile = nic.firewall_profile |
838 |
if firewall_profile and firewall_profile != "DISABLED": |
839 |
tag = _firewall_tags[firewall_profile] % nic.index |
840 |
client.DeleteInstanceTags(vm.backend_vm_id, [tag], |
841 |
dry_run=settings.TEST) |
842 |
|
843 |
return jobID
|
844 |
|
845 |
|
846 |
def set_firewall_profile(vm, profile, index=0): |
847 |
try:
|
848 |
tag = _firewall_tags[profile] % index |
849 |
except KeyError: |
850 |
raise ValueError("Unsopported Firewall Profile: %s" % profile) |
851 |
|
852 |
log.debug("Setting tag of VM %s, NIC index %d, to %s", vm, index, profile)
|
853 |
|
854 |
with pooled_rapi_client(vm) as client: |
855 |
# Delete previous firewall tags
|
856 |
old_tags = client.GetInstanceTags(vm.backend_vm_id) |
857 |
delete_tags = [(t % index) for t in _firewall_tags.values() |
858 |
if (t % index) in old_tags] |
859 |
if delete_tags:
|
860 |
client.DeleteInstanceTags(vm.backend_vm_id, delete_tags, |
861 |
dry_run=settings.TEST) |
862 |
|
863 |
if profile != "DISABLED": |
864 |
client.AddInstanceTags(vm.backend_vm_id, [tag], |
865 |
dry_run=settings.TEST) |
866 |
|
867 |
# XXX NOP ModifyInstance call to force process_net_status to run
|
868 |
# on the dispatcher
|
869 |
os_name = settings.GANETI_CREATEINSTANCE_KWARGS['os']
|
870 |
client.ModifyInstance(vm.backend_vm_id, |
871 |
os_name=os_name) |
872 |
return None |
873 |
|
874 |
|
875 |
def get_instances(backend, bulk=True): |
876 |
with pooled_rapi_client(backend) as c: |
877 |
return c.GetInstances(bulk=bulk)
|
878 |
|
879 |
|
880 |
def get_nodes(backend, bulk=True): |
881 |
with pooled_rapi_client(backend) as c: |
882 |
return c.GetNodes(bulk=bulk)
|
883 |
|
884 |
|
885 |
def get_jobs(backend, bulk=True): |
886 |
with pooled_rapi_client(backend) as c: |
887 |
return c.GetJobs(bulk=bulk)
|
888 |
|
889 |
|
890 |
def get_physical_resources(backend): |
891 |
""" Get the physical resources of a backend.
|
892 |
|
893 |
Get the resources of a backend as reported by the backend (not the db).
|
894 |
|
895 |
"""
|
896 |
nodes = get_nodes(backend, bulk=True)
|
897 |
attr = ['mfree', 'mtotal', 'dfree', 'dtotal', 'pinst_cnt', 'ctotal'] |
898 |
res = {} |
899 |
for a in attr: |
900 |
res[a] = 0
|
901 |
for n in nodes: |
902 |
# Filter out drained, offline and not vm_capable nodes since they will
|
903 |
# not take part in the vm allocation process
|
904 |
can_host_vms = n['vm_capable'] and not (n['drained'] or n['offline']) |
905 |
if can_host_vms and n['cnodes']: |
906 |
for a in attr: |
907 |
res[a] += int(n[a])
|
908 |
return res
|
909 |
|
910 |
|
911 |
def update_backend_resources(backend, resources=None): |
912 |
""" Update the state of the backend resources in db.
|
913 |
|
914 |
"""
|
915 |
|
916 |
if not resources: |
917 |
resources = get_physical_resources(backend) |
918 |
|
919 |
backend.mfree = resources['mfree']
|
920 |
backend.mtotal = resources['mtotal']
|
921 |
backend.dfree = resources['dfree']
|
922 |
backend.dtotal = resources['dtotal']
|
923 |
backend.pinst_cnt = resources['pinst_cnt']
|
924 |
backend.ctotal = resources['ctotal']
|
925 |
backend.updated = datetime.now() |
926 |
backend.save() |
927 |
|
928 |
|
929 |
def get_memory_from_instances(backend): |
930 |
""" Get the memory that is used from instances.
|
931 |
|
932 |
Get the used memory of a backend. Note: This is different for
|
933 |
the real memory used, due to kvm's memory de-duplication.
|
934 |
|
935 |
"""
|
936 |
with pooled_rapi_client(backend) as client: |
937 |
instances = client.GetInstances(bulk=True)
|
938 |
mem = 0
|
939 |
for i in instances: |
940 |
mem += i['oper_ram']
|
941 |
return mem
|
942 |
|
943 |
|
944 |
def get_available_disk_templates(backend): |
945 |
"""Get the list of available disk templates of a Ganeti backend.
|
946 |
|
947 |
The list contains the disk templates that are enabled in the Ganeti backend
|
948 |
and also included in ipolicy-disk-templates.
|
949 |
|
950 |
"""
|
951 |
with pooled_rapi_client(backend) as c: |
952 |
info = c.GetInfo() |
953 |
ipolicy_disk_templates = info["ipolicy"]["disk-templates"] |
954 |
try:
|
955 |
enabled_disk_templates = info["enabled_disk_templates"]
|
956 |
return [dp for dp in enabled_disk_templates |
957 |
if dp in ipolicy_disk_templates] |
958 |
except KeyError: |
959 |
# Ganeti < 2.8 does not have 'enabled_disk_templates'
|
960 |
return ipolicy_disk_templates
|
961 |
|
962 |
|
963 |
def update_backend_disk_templates(backend): |
964 |
disk_templates = get_available_disk_templates(backend) |
965 |
backend.disk_templates = disk_templates |
966 |
backend.save() |
967 |
|
968 |
|
969 |
##
|
970 |
## Synchronized operations for reconciliation
|
971 |
##
|
972 |
|
973 |
|
974 |
def create_network_synced(network, backend): |
975 |
result = _create_network_synced(network, backend) |
976 |
if result[0] != 'success': |
977 |
return result
|
978 |
result = connect_network_synced(network, backend) |
979 |
return result
|
980 |
|
981 |
|
982 |
def _create_network_synced(network, backend): |
983 |
with pooled_rapi_client(backend) as client: |
984 |
job = _create_network(network, backend) |
985 |
result = wait_for_job(client, job) |
986 |
return result
|
987 |
|
988 |
|
989 |
def connect_network_synced(network, backend): |
990 |
with pooled_rapi_client(backend) as client: |
991 |
for group in client.GetGroups(): |
992 |
job = client.ConnectNetwork(network.backend_id, group, |
993 |
network.mode, network.link) |
994 |
result = wait_for_job(client, job) |
995 |
if result[0] != 'success': |
996 |
return result
|
997 |
|
998 |
return result
|
999 |
|
1000 |
|
1001 |
def wait_for_job(client, jobid): |
1002 |
result = client.WaitForJobChange(jobid, ['status', 'opresult'], None, None) |
1003 |
status = result['job_info'][0] |
1004 |
while status not in ['success', 'error', 'cancel']: |
1005 |
result = client.WaitForJobChange(jobid, ['status', 'opresult'], |
1006 |
[result], None)
|
1007 |
status = result['job_info'][0] |
1008 |
|
1009 |
if status == 'success': |
1010 |
return (status, None) |
1011 |
else:
|
1012 |
error = result['job_info'][1] |
1013 |
return (status, error)
|