root / snf-cyclades-app / synnefo / logic / backend.py @ 1fdd8d69
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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, IPAddress, IPAddressLog) |
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from synnefo.logic import utils, ips |
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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 import rapi |
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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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# Timeout in seconds for building NICs. After this period the NICs considered
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# stale and removed from DB.
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BUILDING_NIC_TIMEOUT = timedelta(seconds=180)
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SIMPLE_NIC_FIELDS = ["state", "mac", "network", "firewall_profile", "index"] |
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COMPLEX_NIC_FIELDS = ["ipv4_address", "ipv6_address"] |
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NIC_FIELDS = SIMPLE_NIC_FIELDS + COMPLEX_NIC_FIELDS |
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UNKNOWN_NIC_PREFIX = "unknown-"
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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 rapi.JOB_STATUS_FINALIZED: |
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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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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 == rapi.JOB_STATUS_SUCCESS:
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quotas.accept_serial(serial) |
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elif job_status in [rapi.JOB_STATUS_ERROR, rapi.JOB_STATUS_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 == rapi.JOB_STATUS_SUCCESS:
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commission_info = quotas.get_commission_info(resource=vm, |
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action=action, |
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action_fields=job_fields) |
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if commission_info is not None: |
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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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log.debug("Expected job was %s. Processing job %s.",
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vm.task_job_id, job_id) |
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reason = ("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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action_fields=job_fields, |
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commission_name=reason, |
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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 not in rapi.JOB_STATUS_FINALIZED: |
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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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new_operstate = None
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state_for_success = VirtualMachine.OPER_STATE_FROM_OPCODE.get(opcode) |
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if status == rapi.JOB_STATUS_SUCCESS:
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# If job succeeds, change operating state if needed
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if state_for_success is not None: |
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new_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 rapi.JOB_STATUS_FINALIZED 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 (rapi.JOB_STATUS_CANCELED, |
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rapi.JOB_STATUS_ERROR): |
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new_operstate = "ERROR"
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vm.backendtime = etime |
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# Update state of associated NICs
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vm.nics.all().update(state="ERROR")
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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 == rapi.JOB_STATUS_SUCCESS or |
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(status == rapi.JOB_STATUS_ERROR and 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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remove_nic_ips(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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new_operstate = state_for_success |
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vm.backendtime = etime |
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status = rapi.JOB_STATUS_SUCCESS |
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if status in rapi.JOB_STATUS_FINALIZED: |
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# Job is finalized: Handle quotas/commissioning
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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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if new_operstate is not None: |
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vm.operstate = new_operstate |
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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("Cannot 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)
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for nic in vm.nics.prefetch_related("ips__subnet")]) |
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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 db_nic.state != "BUILD" or\ |
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(db_nic.state == "BUILD" and |
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etime > db_nic.created + BUILDING_NIC_TIMEOUT): |
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remove_nic_ips(db_nic) |
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db_nic.delete() |
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else:
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log.warning("Ignoring recent building NIC: %s", db_nic)
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elif db_nic is None: |
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msg = ("NIC/%s of VM %s does not exist in DB! Cannot automatically"
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" fix this issue!" % (nic_name, vm))
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log.error(msg) |
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continue
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elif not nics_are_equal(db_nic, ganeti_nic): |
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for f in SIMPLE_NIC_FIELDS: |
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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])
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db_nic.save() |
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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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ipv4_address = ganeti_nic["ipv4_address"]
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if db_nic.ipv4_address != ipv4_address:
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change_address_of_port(db_nic, vm.userid, |
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old_address=db_nic.ipv4_address, |
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new_address=ipv4_address, |
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version=4)
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ipv6_address = ganeti_nic["ipv6_address"]
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if db_nic.ipv6_address != ipv6_address:
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change_address_of_port(db_nic, vm.userid, |
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old_address=db_nic.ipv6_address, |
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new_address=ipv6_address, |
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version=6)
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vm.backendtime = etime |
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vm.save() |
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def change_address_of_port(port, userid, old_address, new_address, version): |
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"""Change."""
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if old_address is not None: |
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msg = ("IPv%s Address of server '%s' changed from '%s' to '%s'"
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% (version, port.machine_id, old_address, new_address)) |
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log.critical(msg) |
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# Remove the old IP address
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remove_nic_ips(port, version=version) |
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if version == 4: |
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ipaddress = ips.allocate_ip(port.network, userid, address=new_address) |
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ipaddress.nic = port |
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ipaddress.save() |
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elif version == 6: |
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subnet6 = port.network.subnet6 |
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ipaddress = IPAddress.objects.create(userid=userid, |
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network=port.network, |
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subnet=subnet6, |
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nic=port, |
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address=new_address) |
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else:
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raise ValueError("Unknown version: %s" % version) |
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# New address log
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ip_log = IPAddressLog.objects.create(server_id=port.machine_id, |
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network_id=port.network_id, |
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address=new_address, |
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active=True)
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log.info("Created IP log entry '%s' for address '%s' to server '%s'",
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ip_log.id, new_address, port.machine_id) |
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return ipaddress
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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_NIC_PREFIX + 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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subnet6 = network.subnet6 |
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ipv6 = mac2eui64(mac, subnet6.cidr) if subnet6 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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|
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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_address': ipv4,
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'ipv6_address': 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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|
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|
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def remove_nic_ips(nic, version=None): |
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"""Remove IP addresses associated with a NetworkInterface.
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Remove all IP addresses that are associated with the NetworkInterface
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object, by returning them to the pool and deleting the IPAddress object. If
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the IP is a floating IP, then it is just disassociated from the NIC.
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If version is specified, then only IP addressses of that version will be
|
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removed.
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|
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"""
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for ip in nic.ips.all(): |
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if version and ip.ipversion != version: |
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continue
|
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|
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# Update the DB table holding the logging of all IP addresses
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terminate_active_ipaddress_log(nic, ip) |
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|
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if ip.floating_ip:
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ip.nic = None
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ip.save() |
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else:
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# Release the IPv4 address
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ip.release_address() |
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ip.delete() |
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|
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|
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def terminate_active_ipaddress_log(nic, ip): |
408 |
"""Update DB logging entry for this IP address."""
|
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if not ip.network.public or nic.machine is None: |
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return
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try:
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ip_log, created = \ |
413 |
IPAddressLog.objects.get_or_create(server_id=nic.machine_id, |
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network_id=ip.network_id, |
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address=ip.address, |
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active=True)
|
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except IPAddressLog.MultipleObjectsReturned:
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logmsg = ("Multiple active log entries for IP %s, Network %s,"
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"Server %s. Cannot proceed!"
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% (ip.address, ip.network, nic.machine)) |
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log.error(logmsg) |
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raise
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|
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if created:
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logmsg = ("No log entry for IP %s, Network %s, Server %s. Created new"
|
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" but with wrong creation timestamp."
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% (ip.address, ip.network, nic.machine)) |
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log.error(logmsg) |
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ip_log.released_at = datetime.now() |
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ip_log.active = False
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ip_log.save() |
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|
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|
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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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|
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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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|
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# Note: Network is already locked!
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network = back_network.network |
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|
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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 == rapi.JOB_STATUS_SUCCESS and state_for_success is not None: |
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back_network.operstate = state_for_success |
451 |
|
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if (status in (rapi.JOB_STATUS_CANCELED, rapi.JOB_STATUS_ERROR) |
453 |
and opcode == 'OP_NETWORK_ADD'): |
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back_network.operstate = 'ERROR'
|
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back_network.backendtime = etime |
456 |
|
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if opcode == 'OP_NETWORK_REMOVE': |
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network_is_deleted = (status == rapi.JOB_STATUS_SUCCESS) |
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if network_is_deleted or (status == rapi.JOB_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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|
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if status == rapi.JOB_STATUS_SUCCESS:
|
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back_network.backendtime = etime |
467 |
back_network.save() |
468 |
# Also you must update the state of the Network!!
|
469 |
update_network_state(network) |
470 |
|
471 |
|
472 |
def update_network_state(network): |
473 |
"""Update the state of a Network based on BackendNetwork states.
|
474 |
|
475 |
Update the state of a Network based on the operstate of the networks in the
|
476 |
backends that network exists.
|
477 |
|
478 |
The state of the network is:
|
479 |
* ACTIVE: If it is 'ACTIVE' in at least one backend.
|
480 |
* DELETED: If it is is 'DELETED' in all backends that have been created.
|
481 |
|
482 |
This function also releases the resources (MAC prefix or Bridge) and the
|
483 |
quotas for the network.
|
484 |
|
485 |
"""
|
486 |
if network.deleted:
|
487 |
# Network has already been deleted. Just assert that state is also
|
488 |
# DELETED
|
489 |
if not network.state == "DELETED": |
490 |
network.state = "DELETED"
|
491 |
network.save() |
492 |
return
|
493 |
|
494 |
backend_states = [s.operstate for s in network.backend_networks.all()] |
495 |
if not backend_states and network.action != "DESTROY": |
496 |
if network.state != "ACTIVE": |
497 |
network.state = "ACTIVE"
|
498 |
network.save() |
499 |
return
|
500 |
|
501 |
# Network is deleted when all BackendNetworks go to "DELETED" operstate
|
502 |
deleted = reduce(lambda x, y: x == y and "DELETED", backend_states, |
503 |
"DELETED")
|
504 |
|
505 |
# Release the resources on the deletion of the Network
|
506 |
if deleted:
|
507 |
if network.ips.filter(deleted=False, floating_ip=True).exists(): |
508 |
msg = "Cannot delete network %s! Floating IPs still in use!"
|
509 |
log.error(msg % network) |
510 |
raise Exception(msg % network) |
511 |
log.info("Network %r deleted. Releasing link %r mac_prefix %r",
|
512 |
network.id, network.mac_prefix, network.link) |
513 |
network.deleted = True
|
514 |
network.state = "DELETED"
|
515 |
if network.mac_prefix:
|
516 |
if network.FLAVORS[network.flavor]["mac_prefix"] == "pool": |
517 |
release_resource(res_type="mac_prefix",
|
518 |
value=network.mac_prefix) |
519 |
if network.link:
|
520 |
if network.FLAVORS[network.flavor]["link"] == "pool": |
521 |
release_resource(res_type="bridge", value=network.link)
|
522 |
|
523 |
# Set all subnets as deleted
|
524 |
network.subnets.update(deleted=True)
|
525 |
# And delete the IP pools
|
526 |
for subnet in network.subnets.all(): |
527 |
if subnet.ipversion == 4: |
528 |
subnet.ip_pools.all().delete() |
529 |
# And all the backend networks since there are useless
|
530 |
network.backend_networks.all().delete() |
531 |
|
532 |
# Issue commission
|
533 |
if network.userid:
|
534 |
quotas.issue_and_accept_commission(network, action="DESTROY")
|
535 |
# the above has already saved the object and committed;
|
536 |
# a second save would override others' changes, since the
|
537 |
# object is now unlocked
|
538 |
return
|
539 |
elif not network.public: |
540 |
log.warning("Network %s does not have an owner!", network.id)
|
541 |
network.save() |
542 |
|
543 |
|
544 |
@transaction.commit_on_success
|
545 |
def process_network_modify(back_network, etime, jobid, opcode, status, |
546 |
job_fields): |
547 |
assert (opcode == "OP_NETWORK_SET_PARAMS") |
548 |
if status not in [x[0] for x in BACKEND_STATUSES]: |
549 |
raise Network.InvalidBackendMsgError(opcode, status)
|
550 |
|
551 |
back_network.backendjobid = jobid |
552 |
back_network.backendjobstatus = status |
553 |
back_network.opcode = opcode |
554 |
|
555 |
add_reserved_ips = job_fields.get("add_reserved_ips")
|
556 |
if add_reserved_ips:
|
557 |
network = back_network.network |
558 |
for ip in add_reserved_ips: |
559 |
network.reserve_address(ip, external=True)
|
560 |
|
561 |
if status == rapi.JOB_STATUS_SUCCESS:
|
562 |
back_network.backendtime = etime |
563 |
back_network.save() |
564 |
|
565 |
|
566 |
@transaction.commit_on_success
|
567 |
def process_create_progress(vm, etime, progress): |
568 |
|
569 |
percentage = int(progress)
|
570 |
|
571 |
# The percentage may exceed 100%, due to the way
|
572 |
# snf-image:copy-progress tracks bytes read by image handling processes
|
573 |
percentage = 100 if percentage > 100 else percentage |
574 |
if percentage < 0: |
575 |
raise ValueError("Percentage cannot be negative") |
576 |
|
577 |
# FIXME: log a warning here, see #1033
|
578 |
# if last_update > percentage:
|
579 |
# raise ValueError("Build percentage should increase monotonically " \
|
580 |
# "(old = %d, new = %d)" % (last_update, percentage))
|
581 |
|
582 |
# This assumes that no message of type 'ganeti-create-progress' is going to
|
583 |
# arrive once OP_INSTANCE_CREATE has succeeded for a Ganeti instance and
|
584 |
# the instance is STARTED. What if the two messages are processed by two
|
585 |
# separate dispatcher threads, and the 'ganeti-op-status' message for
|
586 |
# successful creation gets processed before the 'ganeti-create-progress'
|
587 |
# message? [vkoukis]
|
588 |
#
|
589 |
#if not vm.operstate == 'BUILD':
|
590 |
# raise VirtualMachine.IllegalState("VM is not in building state")
|
591 |
|
592 |
vm.buildpercentage = percentage |
593 |
vm.backendtime = etime |
594 |
vm.save() |
595 |
|
596 |
|
597 |
@transaction.commit_on_success
|
598 |
def create_instance_diagnostic(vm, message, source, level="DEBUG", etime=None, |
599 |
details=None):
|
600 |
"""
|
601 |
Create virtual machine instance diagnostic entry.
|
602 |
|
603 |
:param vm: VirtualMachine instance to create diagnostic for.
|
604 |
:param message: Diagnostic message.
|
605 |
:param source: Diagnostic source identifier (e.g. image-helper).
|
606 |
:param level: Diagnostic level (`DEBUG`, `INFO`, `WARNING`, `ERROR`).
|
607 |
:param etime: The time the message occured (if available).
|
608 |
:param details: Additional details or debug information.
|
609 |
"""
|
610 |
VirtualMachineDiagnostic.objects.create_for_vm(vm, level, source=source, |
611 |
source_date=etime, |
612 |
message=message, |
613 |
details=details) |
614 |
|
615 |
|
616 |
def create_instance(vm, nics, flavor, image): |
617 |
"""`image` is a dictionary which should contain the keys:
|
618 |
'backend_id', 'format' and 'metadata'
|
619 |
|
620 |
metadata value should be a dictionary.
|
621 |
"""
|
622 |
|
623 |
# Handle arguments to CreateInstance() as a dictionary,
|
624 |
# initialize it based on a deployment-specific value.
|
625 |
# This enables the administrator to override deployment-specific
|
626 |
# arguments, such as the disk template to use, name of os provider
|
627 |
# and hypervisor-specific parameters at will (see Synnefo #785, #835).
|
628 |
#
|
629 |
kw = vm.backend.get_create_params() |
630 |
kw['mode'] = 'create' |
631 |
kw['name'] = vm.backend_vm_id
|
632 |
# Defined in settings.GANETI_CREATEINSTANCE_KWARGS
|
633 |
|
634 |
kw['disk_template'] = flavor.disk_template
|
635 |
kw['disks'] = [{"size": flavor.disk * 1024}] |
636 |
provider = flavor.disk_provider |
637 |
if provider:
|
638 |
kw['disks'][0]['provider'] = provider |
639 |
kw['disks'][0]['origin'] = flavor.disk_origin |
640 |
|
641 |
kw['nics'] = [{"name": nic.backend_uuid, |
642 |
"network": nic.network.backend_id,
|
643 |
"ip": nic.ipv4_address}
|
644 |
for nic in nics] |
645 |
|
646 |
backend = vm.backend |
647 |
depend_jobs = [] |
648 |
for nic in nics: |
649 |
bnet, job_ids = ensure_network_is_active(backend, nic.network_id) |
650 |
depend_jobs.extend(job_ids) |
651 |
|
652 |
kw["depends"] = create_job_dependencies(depend_jobs)
|
653 |
|
654 |
# Defined in settings.GANETI_CREATEINSTANCE_KWARGS
|
655 |
# kw['os'] = settings.GANETI_OS_PROVIDER
|
656 |
kw['ip_check'] = False |
657 |
kw['name_check'] = False |
658 |
|
659 |
# Do not specific a node explicitly, have
|
660 |
# Ganeti use an iallocator instead
|
661 |
#kw['pnode'] = rapi.GetNodes()[0]
|
662 |
|
663 |
kw['dry_run'] = settings.TEST
|
664 |
|
665 |
kw['beparams'] = {
|
666 |
'auto_balance': True, |
667 |
'vcpus': flavor.cpu,
|
668 |
'memory': flavor.ram}
|
669 |
|
670 |
kw['osparams'] = {
|
671 |
'config_url': vm.config_url,
|
672 |
# Store image id and format to Ganeti
|
673 |
'img_id': image['backend_id'], |
674 |
'img_format': image['format']} |
675 |
|
676 |
# Use opportunistic locking
|
677 |
kw['opportunistic_locking'] = settings.GANETI_USE_OPPORTUNISTIC_LOCKING
|
678 |
|
679 |
# Defined in settings.GANETI_CREATEINSTANCE_KWARGS
|
680 |
# kw['hvparams'] = dict(serial_console=False)
|
681 |
|
682 |
log.debug("Creating instance %s", utils.hide_pass(kw))
|
683 |
with pooled_rapi_client(vm) as client: |
684 |
return client.CreateInstance(**kw)
|
685 |
|
686 |
|
687 |
def delete_instance(vm): |
688 |
with pooled_rapi_client(vm) as client: |
689 |
return client.DeleteInstance(vm.backend_vm_id, dry_run=settings.TEST)
|
690 |
|
691 |
|
692 |
def reboot_instance(vm, reboot_type): |
693 |
assert reboot_type in ('soft', 'hard') |
694 |
kwargs = {"instance": vm.backend_vm_id,
|
695 |
"reboot_type": "hard"} |
696 |
# XXX: Currently shutdown_timeout parameter is not supported from the
|
697 |
# Ganeti RAPI. Until supported, we will fallback for both reboot types
|
698 |
# to the default shutdown timeout of Ganeti (120s). Note that reboot
|
699 |
# type of Ganeti job must be always hard. The 'soft' and 'hard' type
|
700 |
# of OS API is different from the one in Ganeti, and maps to
|
701 |
# 'shutdown_timeout'.
|
702 |
#if reboot_type == "hard":
|
703 |
# kwargs["shutdown_timeout"] = 0
|
704 |
if settings.TEST:
|
705 |
kwargs["dry_run"] = True |
706 |
with pooled_rapi_client(vm) as client: |
707 |
return client.RebootInstance(**kwargs)
|
708 |
|
709 |
|
710 |
def startup_instance(vm): |
711 |
with pooled_rapi_client(vm) as client: |
712 |
return client.StartupInstance(vm.backend_vm_id, dry_run=settings.TEST)
|
713 |
|
714 |
|
715 |
def shutdown_instance(vm): |
716 |
with pooled_rapi_client(vm) as client: |
717 |
return client.ShutdownInstance(vm.backend_vm_id, dry_run=settings.TEST)
|
718 |
|
719 |
|
720 |
def resize_instance(vm, vcpus, memory): |
721 |
beparams = {"vcpus": int(vcpus), |
722 |
"minmem": int(memory), |
723 |
"maxmem": int(memory)} |
724 |
with pooled_rapi_client(vm) as client: |
725 |
return client.ModifyInstance(vm.backend_vm_id, beparams=beparams)
|
726 |
|
727 |
|
728 |
def get_instance_console(vm): |
729 |
# RAPI GetInstanceConsole() returns endpoints to the vnc_bind_address,
|
730 |
# which is a cluster-wide setting, either 0.0.0.0 or 127.0.0.1, and pretty
|
731 |
# useless (see #783).
|
732 |
#
|
733 |
# Until this is fixed on the Ganeti side, construct a console info reply
|
734 |
# directly.
|
735 |
#
|
736 |
# WARNING: This assumes that VNC runs on port network_port on
|
737 |
# the instance's primary node, and is probably
|
738 |
# hypervisor-specific.
|
739 |
#
|
740 |
log.debug("Getting console for vm %s", vm)
|
741 |
|
742 |
console = {} |
743 |
console['kind'] = 'vnc' |
744 |
|
745 |
with pooled_rapi_client(vm) as client: |
746 |
i = client.GetInstance(vm.backend_vm_id) |
747 |
|
748 |
if vm.backend.hypervisor == "kvm" and i['hvparams']['serial_console']: |
749 |
raise Exception("hv parameter serial_console cannot be true") |
750 |
console['host'] = i['pnode'] |
751 |
console['port'] = i['network_port'] |
752 |
|
753 |
return console
|
754 |
|
755 |
|
756 |
def get_instance_info(vm): |
757 |
with pooled_rapi_client(vm) as client: |
758 |
return client.GetInstance(vm.backend_vm_id)
|
759 |
|
760 |
|
761 |
def vm_exists_in_backend(vm): |
762 |
try:
|
763 |
get_instance_info(vm) |
764 |
return True |
765 |
except rapi.GanetiApiError as e: |
766 |
if e.code == 404: |
767 |
return False |
768 |
raise e
|
769 |
|
770 |
|
771 |
def get_network_info(backend_network): |
772 |
with pooled_rapi_client(backend_network) as client: |
773 |
return client.GetNetwork(backend_network.network.backend_id)
|
774 |
|
775 |
|
776 |
def network_exists_in_backend(backend_network): |
777 |
try:
|
778 |
get_network_info(backend_network) |
779 |
return True |
780 |
except rapi.GanetiApiError as e: |
781 |
if e.code == 404: |
782 |
return False |
783 |
|
784 |
|
785 |
def job_is_still_running(vm): |
786 |
with pooled_rapi_client(vm) as c: |
787 |
try:
|
788 |
job_info = c.GetJobStatus(vm.backendjobid) |
789 |
return not (job_info["status"] in rapi.JOB_STATUS_FINALIZED) |
790 |
except rapi.GanetiApiError:
|
791 |
return False |
792 |
|
793 |
|
794 |
def ensure_network_is_active(backend, network_id): |
795 |
"""Ensure that a network is active in the specified backend
|
796 |
|
797 |
Check that a network exists and is active in the specified backend. If not
|
798 |
(re-)create the network. Return the corresponding BackendNetwork object
|
799 |
and the IDs of the Ganeti job to create the network.
|
800 |
|
801 |
"""
|
802 |
network = Network.objects.select_for_update().get(id=network_id) |
803 |
bnet, created = BackendNetwork.objects.get_or_create(backend=backend, |
804 |
network=network) |
805 |
job_ids = [] |
806 |
if bnet.operstate != "ACTIVE": |
807 |
job_ids = create_network(network, backend, connect=True)
|
808 |
|
809 |
return bnet, job_ids
|
810 |
|
811 |
|
812 |
def create_network(network, backend, connect=True): |
813 |
"""Create a network in a Ganeti backend"""
|
814 |
log.debug("Creating network %s in backend %s", network, backend)
|
815 |
|
816 |
job_id = _create_network(network, backend) |
817 |
|
818 |
if connect:
|
819 |
job_ids = connect_network(network, backend, depends=[job_id]) |
820 |
return job_ids
|
821 |
else:
|
822 |
return [job_id]
|
823 |
|
824 |
|
825 |
def _create_network(network, backend): |
826 |
"""Create a network."""
|
827 |
|
828 |
tags = network.backend_tag |
829 |
subnet = None
|
830 |
subnet6 = None
|
831 |
gateway = None
|
832 |
gateway6 = None
|
833 |
for _subnet in network.subnets.all(): |
834 |
if _subnet.dhcp and not "nfdhcpd" in tags: |
835 |
tags.append("nfdhcpd")
|
836 |
if _subnet.ipversion == 4: |
837 |
subnet = _subnet.cidr |
838 |
gateway = _subnet.gateway |
839 |
elif _subnet.ipversion == 6: |
840 |
subnet6 = _subnet.cidr |
841 |
gateway6 = _subnet.gateway |
842 |
|
843 |
if network.public:
|
844 |
conflicts_check = True
|
845 |
tags.append('public')
|
846 |
else:
|
847 |
conflicts_check = False
|
848 |
tags.append('private')
|
849 |
|
850 |
# Use a dummy network subnet for IPv6 only networks. Currently Ganeti does
|
851 |
# not support IPv6 only networks. To bypass this limitation, we create the
|
852 |
# network with a dummy network subnet, and make Cyclades connect instances
|
853 |
# to such networks, with address=None.
|
854 |
if subnet is None: |
855 |
subnet = "10.0.0.0/29"
|
856 |
|
857 |
try:
|
858 |
bn = BackendNetwork.objects.get(network=network, backend=backend) |
859 |
mac_prefix = bn.mac_prefix |
860 |
except BackendNetwork.DoesNotExist:
|
861 |
raise Exception("BackendNetwork for network '%s' in backend '%s'" |
862 |
" does not exist" % (network.id, backend.id))
|
863 |
|
864 |
with pooled_rapi_client(backend) as client: |
865 |
return client.CreateNetwork(network_name=network.backend_id,
|
866 |
network=subnet, |
867 |
network6=subnet6, |
868 |
gateway=gateway, |
869 |
gateway6=gateway6, |
870 |
mac_prefix=mac_prefix, |
871 |
conflicts_check=conflicts_check, |
872 |
tags=tags) |
873 |
|
874 |
|
875 |
def connect_network(network, backend, depends=[], group=None): |
876 |
"""Connect a network to nodegroups."""
|
877 |
log.debug("Connecting network %s to backend %s", network, backend)
|
878 |
|
879 |
if network.public:
|
880 |
conflicts_check = True
|
881 |
else:
|
882 |
conflicts_check = False
|
883 |
|
884 |
depends = create_job_dependencies(depends) |
885 |
with pooled_rapi_client(backend) as client: |
886 |
groups = [group] if group is not None else client.GetGroups() |
887 |
job_ids = [] |
888 |
for group in groups: |
889 |
job_id = client.ConnectNetwork(network.backend_id, group, |
890 |
network.mode, network.link, |
891 |
conflicts_check, |
892 |
depends=depends) |
893 |
job_ids.append(job_id) |
894 |
return job_ids
|
895 |
|
896 |
|
897 |
def delete_network(network, backend, disconnect=True): |
898 |
log.debug("Deleting network %s from backend %s", network, backend)
|
899 |
|
900 |
depends = [] |
901 |
if disconnect:
|
902 |
depends = disconnect_network(network, backend) |
903 |
_delete_network(network, backend, depends=depends) |
904 |
|
905 |
|
906 |
def _delete_network(network, backend, depends=[]): |
907 |
depends = create_job_dependencies(depends) |
908 |
with pooled_rapi_client(backend) as client: |
909 |
return client.DeleteNetwork(network.backend_id, depends)
|
910 |
|
911 |
|
912 |
def disconnect_network(network, backend, group=None): |
913 |
log.debug("Disconnecting network %s to backend %s", network, backend)
|
914 |
|
915 |
with pooled_rapi_client(backend) as client: |
916 |
groups = [group] if group is not None else client.GetGroups() |
917 |
job_ids = [] |
918 |
for group in groups: |
919 |
job_id = client.DisconnectNetwork(network.backend_id, group) |
920 |
job_ids.append(job_id) |
921 |
return job_ids
|
922 |
|
923 |
|
924 |
def connect_to_network(vm, nic): |
925 |
network = nic.network |
926 |
backend = vm.backend |
927 |
bnet, depend_jobs = ensure_network_is_active(backend, network.id) |
928 |
|
929 |
depends = create_job_dependencies(depend_jobs) |
930 |
|
931 |
nic = {'name': nic.backend_uuid,
|
932 |
'network': network.backend_id,
|
933 |
'ip': nic.ipv4_address}
|
934 |
|
935 |
log.debug("Adding NIC %s to VM %s", nic, vm)
|
936 |
|
937 |
kwargs = { |
938 |
"instance": vm.backend_vm_id,
|
939 |
"nics": [("add", "-1", nic)], |
940 |
"depends": depends,
|
941 |
} |
942 |
if vm.backend.use_hotplug():
|
943 |
kwargs["hotplug"] = True |
944 |
if settings.TEST:
|
945 |
kwargs["dry_run"] = True |
946 |
|
947 |
with pooled_rapi_client(vm) as client: |
948 |
return client.ModifyInstance(**kwargs)
|
949 |
|
950 |
|
951 |
def disconnect_from_network(vm, nic): |
952 |
log.debug("Removing NIC %s of VM %s", nic, vm)
|
953 |
|
954 |
kwargs = { |
955 |
"instance": vm.backend_vm_id,
|
956 |
"nics": [("remove", nic.backend_uuid, {})], |
957 |
} |
958 |
if vm.backend.use_hotplug():
|
959 |
kwargs["hotplug"] = True |
960 |
if settings.TEST:
|
961 |
kwargs["dry_run"] = True |
962 |
|
963 |
with pooled_rapi_client(vm) as client: |
964 |
jobID = client.ModifyInstance(**kwargs) |
965 |
firewall_profile = nic.firewall_profile |
966 |
if firewall_profile and firewall_profile != "DISABLED": |
967 |
tag = _firewall_tags[firewall_profile] % nic.backend_uuid |
968 |
client.DeleteInstanceTags(vm.backend_vm_id, [tag], |
969 |
dry_run=settings.TEST) |
970 |
|
971 |
return jobID
|
972 |
|
973 |
|
974 |
def set_firewall_profile(vm, profile, nic): |
975 |
uuid = nic.backend_uuid |
976 |
try:
|
977 |
tag = _firewall_tags[profile] % uuid |
978 |
except KeyError: |
979 |
raise ValueError("Unsopported Firewall Profile: %s" % profile) |
980 |
|
981 |
log.debug("Setting tag of VM %s, NIC %s, to %s", vm, nic, profile)
|
982 |
|
983 |
with pooled_rapi_client(vm) as client: |
984 |
# Delete previous firewall tags
|
985 |
old_tags = client.GetInstanceTags(vm.backend_vm_id) |
986 |
delete_tags = [(t % uuid) for t in _firewall_tags.values() |
987 |
if (t % uuid) in old_tags] |
988 |
if delete_tags:
|
989 |
client.DeleteInstanceTags(vm.backend_vm_id, delete_tags, |
990 |
dry_run=settings.TEST) |
991 |
|
992 |
if profile != "DISABLED": |
993 |
client.AddInstanceTags(vm.backend_vm_id, [tag], |
994 |
dry_run=settings.TEST) |
995 |
|
996 |
# XXX NOP ModifyInstance call to force process_net_status to run
|
997 |
# on the dispatcher
|
998 |
os_name = settings.GANETI_CREATEINSTANCE_KWARGS['os']
|
999 |
client.ModifyInstance(vm.backend_vm_id, |
1000 |
os_name=os_name) |
1001 |
return None |
1002 |
|
1003 |
|
1004 |
def get_instances(backend, bulk=True): |
1005 |
with pooled_rapi_client(backend) as c: |
1006 |
return c.GetInstances(bulk=bulk)
|
1007 |
|
1008 |
|
1009 |
def get_nodes(backend, bulk=True): |
1010 |
with pooled_rapi_client(backend) as c: |
1011 |
return c.GetNodes(bulk=bulk)
|
1012 |
|
1013 |
|
1014 |
def get_jobs(backend, bulk=True): |
1015 |
with pooled_rapi_client(backend) as c: |
1016 |
return c.GetJobs(bulk=bulk)
|
1017 |
|
1018 |
|
1019 |
def get_physical_resources(backend): |
1020 |
""" Get the physical resources of a backend.
|
1021 |
|
1022 |
Get the resources of a backend as reported by the backend (not the db).
|
1023 |
|
1024 |
"""
|
1025 |
nodes = get_nodes(backend, bulk=True)
|
1026 |
attr = ['mfree', 'mtotal', 'dfree', 'dtotal', 'pinst_cnt', 'ctotal'] |
1027 |
res = {} |
1028 |
for a in attr: |
1029 |
res[a] = 0
|
1030 |
for n in nodes: |
1031 |
# Filter out drained, offline and not vm_capable nodes since they will
|
1032 |
# not take part in the vm allocation process
|
1033 |
can_host_vms = n['vm_capable'] and not (n['drained'] or n['offline']) |
1034 |
if can_host_vms and n['cnodes']: |
1035 |
for a in attr: |
1036 |
res[a] += int(n[a] or 0) |
1037 |
return res
|
1038 |
|
1039 |
|
1040 |
def update_backend_resources(backend, resources=None): |
1041 |
""" Update the state of the backend resources in db.
|
1042 |
|
1043 |
"""
|
1044 |
|
1045 |
if not resources: |
1046 |
resources = get_physical_resources(backend) |
1047 |
|
1048 |
backend.mfree = resources['mfree']
|
1049 |
backend.mtotal = resources['mtotal']
|
1050 |
backend.dfree = resources['dfree']
|
1051 |
backend.dtotal = resources['dtotal']
|
1052 |
backend.pinst_cnt = resources['pinst_cnt']
|
1053 |
backend.ctotal = resources['ctotal']
|
1054 |
backend.updated = datetime.now() |
1055 |
backend.save() |
1056 |
|
1057 |
|
1058 |
def get_memory_from_instances(backend): |
1059 |
""" Get the memory that is used from instances.
|
1060 |
|
1061 |
Get the used memory of a backend. Note: This is different for
|
1062 |
the real memory used, due to kvm's memory de-duplication.
|
1063 |
|
1064 |
"""
|
1065 |
with pooled_rapi_client(backend) as client: |
1066 |
instances = client.GetInstances(bulk=True)
|
1067 |
mem = 0
|
1068 |
for i in instances: |
1069 |
mem += i['oper_ram']
|
1070 |
return mem
|
1071 |
|
1072 |
|
1073 |
def get_available_disk_templates(backend): |
1074 |
"""Get the list of available disk templates of a Ganeti backend.
|
1075 |
|
1076 |
The list contains the disk templates that are enabled in the Ganeti backend
|
1077 |
and also included in ipolicy-disk-templates.
|
1078 |
|
1079 |
"""
|
1080 |
with pooled_rapi_client(backend) as c: |
1081 |
info = c.GetInfo() |
1082 |
ipolicy_disk_templates = info["ipolicy"]["disk-templates"] |
1083 |
try:
|
1084 |
enabled_disk_templates = info["enabled_disk_templates"]
|
1085 |
return [dp for dp in enabled_disk_templates |
1086 |
if dp in ipolicy_disk_templates] |
1087 |
except KeyError: |
1088 |
# Ganeti < 2.8 does not have 'enabled_disk_templates'
|
1089 |
return ipolicy_disk_templates
|
1090 |
|
1091 |
|
1092 |
def update_backend_disk_templates(backend): |
1093 |
disk_templates = get_available_disk_templates(backend) |
1094 |
backend.disk_templates = disk_templates |
1095 |
backend.save() |
1096 |
|
1097 |
|
1098 |
##
|
1099 |
## Synchronized operations for reconciliation
|
1100 |
##
|
1101 |
|
1102 |
|
1103 |
def create_network_synced(network, backend): |
1104 |
result = _create_network_synced(network, backend) |
1105 |
if result[0] != rapi.JOB_STATUS_SUCCESS: |
1106 |
return result
|
1107 |
result = connect_network_synced(network, backend) |
1108 |
return result
|
1109 |
|
1110 |
|
1111 |
def _create_network_synced(network, backend): |
1112 |
with pooled_rapi_client(backend) as client: |
1113 |
job = _create_network(network, backend) |
1114 |
result = wait_for_job(client, job) |
1115 |
return result
|
1116 |
|
1117 |
|
1118 |
def connect_network_synced(network, backend): |
1119 |
with pooled_rapi_client(backend) as client: |
1120 |
for group in client.GetGroups(): |
1121 |
job = client.ConnectNetwork(network.backend_id, group, |
1122 |
network.mode, network.link) |
1123 |
result = wait_for_job(client, job) |
1124 |
if result[0] != rapi.JOB_STATUS_SUCCESS: |
1125 |
return result
|
1126 |
|
1127 |
return result
|
1128 |
|
1129 |
|
1130 |
def wait_for_job(client, jobid): |
1131 |
result = client.WaitForJobChange(jobid, ['status', 'opresult'], None, None) |
1132 |
status = result['job_info'][0] |
1133 |
while status not in rapi.JOB_STATUS_FINALIZED: |
1134 |
result = client.WaitForJobChange(jobid, ['status', 'opresult'], |
1135 |
[result], None)
|
1136 |
status = result['job_info'][0] |
1137 |
|
1138 |
if status == rapi.JOB_STATUS_SUCCESS:
|
1139 |
return (status, None) |
1140 |
else:
|
1141 |
error = result['job_info'][1] |
1142 |
return (status, error)
|
1143 |
|
1144 |
|
1145 |
def create_job_dependencies(job_ids=[], job_states=None): |
1146 |
"""Transform a list of job IDs to Ganeti 'depends' attribute."""
|
1147 |
if job_states is None: |
1148 |
job_states = list(rapi.JOB_STATUS_FINALIZED)
|
1149 |
assert(type(job_states) == list) |
1150 |
return [[job_id, job_states] for job_id in job_ids] |