root / snf-cyclades-app / synnefo / logic / backend.py @ ca4d59e3
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# Copyright 2011 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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from django.conf import settings |
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from django.db import transaction |
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from datetime import datetime |
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from synnefo.db.models import (Backend, VirtualMachine, Network, |
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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 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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@transaction.commit_on_success
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def process_op_status(vm, etime, jobid, opcode, status, logmsg, nics=None, |
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beparams=None):
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"""Process a job progress notification from the backend
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Process an incoming message from the backend (currently Ganeti).
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Job notifications with a terminating status (sucess, error, or canceled),
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also update the operating state of the VM.
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"""
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# See #1492, #1031, #1111 why this line has been removed
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#if (opcode not in [x[0] for x in VirtualMachine.BACKEND_OPCODES] or
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if status not in [x[0] for x in BACKEND_STATUSES]: |
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raise VirtualMachine.InvalidBackendMsgError(opcode, status)
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vm.backendjobid = jobid |
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vm.backendjobstatus = status |
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vm.backendopcode = opcode |
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vm.backendlogmsg = logmsg |
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# Notifications of success change the operating state
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state_for_success = VirtualMachine.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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vm.operstate = state_for_success |
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if status == "success" 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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if beparams:
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assert(opcode == "OP_INSTANCE_SET_PARAMS"), "'beparams' should exist"\ |
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" only for SET_PARAMS"
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# VM Resize
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if status == "success": |
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# VM has been resized. Change the flavor
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_process_resize(vm, beparams) |
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vm.operstate = "STOPPED"
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elif status in ("canceled", "error"): |
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vm.operstate = "STOPPED"
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else:
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vm.operstate = "RESIZE"
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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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# Set the deleted flag explicitly, cater for admin-initiated removals
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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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#
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if status == 'success' or (status == 'error' and |
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vm.operstate == 'ERROR'):
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_process_net_status(vm, etime, nics=[]) |
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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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# Issue and accept commission to Quotaholder
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quotas.issue_and_accept_commission(vm, delete=True)
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# Update backendtime only for jobs that have been successfully completed,
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# since only these jobs update the state of the VM. Else a "race condition"
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# may occur when a successful job (e.g. OP_INSTANCE_REMOVE) completes
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# before an error job and messages arrive in reversed order.
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if status == 'success': |
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vm.backendtime = etime |
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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", None) or old_flavor.cpu |
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minmem, maxmem = beparams.get("minmem"), beparams.get("maxmem") |
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assert(minmem == maxmem), "Different minmem from maxmem" |
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if vcpus is None and maxmem is None: |
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return
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ram = maxmem or old_flavor.ram
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try:
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new_flavor = Flavor.objects.get(cpu=vcpus, ram=ram, |
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disk=old_flavor.disk, |
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disk_template=old_flavor.disk_template) |
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except Flavor.DoesNotExist:
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raise Exception("Can not find flavor for VM") |
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vm.flavor = new_flavor |
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vm.save() |
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@transaction.commit_on_success
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def process_net_status(vm, etime, nics): |
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"""Wrap _process_net_status inside transaction."""
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_process_net_status(vm, etime, nics) |
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def _process_net_status(vm, etime, nics): |
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"""Process a net status notification from the backend
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Process an incoming message from the Ganeti backend,
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detailing the NIC configuration of a VM instance.
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Update the state of the VM in the DB accordingly.
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"""
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ganeti_nics = process_ganeti_nics(nics) |
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if not nics_changed(vm.nics.order_by('index'), ganeti_nics): |
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log.debug("NICs for VM %s have not changed", vm)
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return
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# Get X-Lock on backend before getting X-Lock on network IP pools, to
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# guarantee that no deadlock will occur with Backend allocator.
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Backend.objects.select_for_update().get(id=vm.backend_id) |
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release_instance_nics(vm) |
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for nic in ganeti_nics: |
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ipv4 = nic.get('ipv4', '') |
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net = nic['network']
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if ipv4:
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net.reserve_address(ipv4) |
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nic['dirty'] = False |
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vm.nics.create(**nic) |
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# Dummy save the network, because UI uses changed-since for VMs
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# and Networks in order to show the VM NICs
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net.save() |
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vm.backendtime = etime |
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vm.save() |
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def process_ganeti_nics(ganeti_nics): |
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"""Process NIC dict from ganeti hooks."""
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new_nics = [] |
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for i, new_nic in enumerate(ganeti_nics): |
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network = new_nic.get('network', '') |
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n = str(network)
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pk = utils.id_from_network_name(n) |
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net = Network.objects.get(pk=pk) |
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# Get the new nic info
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mac = new_nic.get('mac', '') |
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ipv4 = new_nic.get('ip', '') |
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if net.subnet6:
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ipv6 = mac2eui64(mac, net.subnet6) |
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else:
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ipv6 = ''
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firewall = new_nic.get('firewall', '') |
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firewall_profile = _reverse_tags.get(firewall, '')
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if not firewall_profile and net.public: |
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firewall_profile = settings.DEFAULT_FIREWALL_PROFILE |
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nic = { |
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'index': i,
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'network': net,
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'mac': mac,
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'ipv4': ipv4,
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'ipv6': ipv6,
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'firewall_profile': firewall_profile,
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'state': 'ACTIVE'} |
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new_nics.append(nic) |
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return new_nics
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def nics_changed(old_nics, new_nics): |
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"""Return True if NICs have changed in any way."""
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if len(old_nics) != len(new_nics): |
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return True |
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fields = ["ipv4", "ipv6", "mac", "firewall_profile", "index", "network"] |
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for old_nic, new_nic in zip(old_nics, new_nics): |
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for field in fields: |
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if getattr(old_nic, field) != new_nic[field]: |
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return True |
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return False |
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def release_instance_nics(vm): |
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for nic in vm.nics.all(): |
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net = nic.network |
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if nic.ipv4:
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net.release_address(nic.ipv4) |
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nic.delete() |
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net.save() |
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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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# 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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if status == 'success' or (status == 'error' and |
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back_network.operstate == 'ERROR'):
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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(back_network.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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# 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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# 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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# 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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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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@transaction.commit_on_success
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def process_network_modify(back_network, etime, jobid, opcode, status, |
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add_reserved_ips, remove_reserved_ips): |
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assert (opcode == "OP_NETWORK_SET_PARAMS") |
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if status not in [x[0] for x in BACKEND_STATUSES]: |
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raise Network.InvalidBackendMsgError(opcode, status)
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back_network.backendjobid = jobid |
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back_network.backendjobstatus = status |
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back_network.opcode = opcode |
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if add_reserved_ips or remove_reserved_ips: |
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net = back_network.network |
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pool = net.get_pool() |
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if add_reserved_ips:
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for ip in add_reserved_ips: |
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pool.reserve(ip, external=True)
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if remove_reserved_ips:
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for ip in remove_reserved_ips: |
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pool.put(ip, external=True)
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pool.save() |
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if status == 'success': |
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back_network.backendtime = etime |
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back_network.save() |
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@transaction.commit_on_success
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def process_create_progress(vm, etime, progress): |
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percentage = int(progress)
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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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# 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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# This assumes that no message of type 'ganeti-create-progress' is going to
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# arrive once OP_INSTANCE_CREATE has succeeded for a Ganeti instance and
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# the instance is STARTED. What if the two messages are processed by two
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# separate dispatcher threads, and the 'ganeti-op-status' message for
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# successful creation gets processed before the 'ganeti-create-progress'
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# message? [vkoukis]
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#
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#if not vm.operstate == 'BUILD':
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# raise VirtualMachine.IllegalState("VM is not in building state")
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vm.buildpercentage = percentage |
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vm.backendtime = etime |
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vm.save() |
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def create_instance_diagnostic(vm, message, source, level="DEBUG", etime=None, |
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details=None):
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"""
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Create virtual machine instance diagnostic entry.
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:param vm: VirtualMachine instance to create diagnostic for.
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:param message: Diagnostic message.
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:param source: Diagnostic source identifier (e.g. image-helper).
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:param level: Diagnostic level (`DEBUG`, `INFO`, `WARNING`, `ERROR`).
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:param etime: The time the message occured (if available).
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:param details: Additional details or debug information.
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"""
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VirtualMachineDiagnostic.objects.create_for_vm(vm, level, source=source, |
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source_date=etime, |
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message=message, |
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details=details) |
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|
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|
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def create_instance(vm, public_nic, flavor, image): |
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"""`image` is a dictionary which should contain the keys:
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'backend_id', 'format' and 'metadata'
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|
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metadata value should be a dictionary.
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"""
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# Handle arguments to CreateInstance() as a dictionary,
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# initialize it based on a deployment-specific value.
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# This enables the administrator to override deployment-specific
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# arguments, such as the disk template to use, name of os provider
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# and hypervisor-specific parameters at will (see Synnefo #785, #835).
|
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#
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kw = vm.backend.get_create_params() |
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kw['mode'] = 'create' |
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kw['name'] = vm.backend_vm_id
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# Defined in settings.GANETI_CREATEINSTANCE_KWARGS
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kw['disk_template'] = flavor.disk_template
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kw['disks'] = [{"size": flavor.disk * 1024}] |
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provider = flavor.disk_provider |
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if provider:
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kw['disks'][0]['provider'] = provider |
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kw['disks'][0]['origin'] = flavor.disk_origin |
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kw['nics'] = [public_nic]
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if vm.backend.use_hotplug():
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kw['hotplug'] = True |
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# Defined in settings.GANETI_CREATEINSTANCE_KWARGS
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# kw['os'] = settings.GANETI_OS_PROVIDER
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kw['ip_check'] = False |
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kw['name_check'] = False |
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|
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# Do not specific a node explicitly, have
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# Ganeti use an iallocator instead
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#kw['pnode'] = rapi.GetNodes()[0]
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kw['dry_run'] = settings.TEST
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kw['beparams'] = {
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'auto_balance': True, |
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'vcpus': flavor.cpu,
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'memory': flavor.ram}
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kw['osparams'] = {
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'config_url': vm.config_url,
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# Store image id and format to Ganeti
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'img_id': image['backend_id'], |
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'img_format': image['format']} |
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|
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# Defined in settings.GANETI_CREATEINSTANCE_KWARGS
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# kw['hvparams'] = dict(serial_console=False)
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log.debug("Creating instance %s", utils.hide_pass(kw))
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with pooled_rapi_client(vm) as client: |
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return client.CreateInstance(**kw)
|
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|
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|
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def delete_instance(vm): |
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with pooled_rapi_client(vm) as client: |
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return client.DeleteInstance(vm.backend_vm_id, dry_run=settings.TEST)
|
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|
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|
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def reboot_instance(vm, reboot_type): |
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assert reboot_type in ('soft', 'hard') |
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with pooled_rapi_client(vm) as client: |
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return client.RebootInstance(vm.backend_vm_id, reboot_type,
|
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dry_run=settings.TEST) |
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|
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|
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def startup_instance(vm): |
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with pooled_rapi_client(vm) as client: |
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return client.StartupInstance(vm.backend_vm_id, dry_run=settings.TEST)
|
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|
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|
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def shutdown_instance(vm): |
487 |
with pooled_rapi_client(vm) as client: |
488 |
return client.ShutdownInstance(vm.backend_vm_id, dry_run=settings.TEST)
|
489 |
|
490 |
|
491 |
def resize_instance(vm, vcpus, memory): |
492 |
beparams = {"vcpus": int(vcpus), |
493 |
"minmem": int(memory), |
494 |
"maxmem": int(memory)} |
495 |
with pooled_rapi_client(vm) as client: |
496 |
return client.ModifyInstance(vm.backend_vm_id, beparams=beparams)
|
497 |
|
498 |
|
499 |
def get_instance_console(vm): |
500 |
# RAPI GetInstanceConsole() returns endpoints to the vnc_bind_address,
|
501 |
# which is a cluster-wide setting, either 0.0.0.0 or 127.0.0.1, and pretty
|
502 |
# useless (see #783).
|
503 |
#
|
504 |
# Until this is fixed on the Ganeti side, construct a console info reply
|
505 |
# directly.
|
506 |
#
|
507 |
# WARNING: This assumes that VNC runs on port network_port on
|
508 |
# the instance's primary node, and is probably
|
509 |
# hypervisor-specific.
|
510 |
#
|
511 |
log.debug("Getting console for vm %s", vm)
|
512 |
|
513 |
console = {} |
514 |
console['kind'] = 'vnc' |
515 |
|
516 |
with pooled_rapi_client(vm) as client: |
517 |
i = client.GetInstance(vm.backend_vm_id) |
518 |
|
519 |
if vm.backend.hypervisor == "kvm" and i['hvparams']['serial_console']: |
520 |
raise Exception("hv parameter serial_console cannot be true") |
521 |
console['host'] = i['pnode'] |
522 |
console['port'] = i['network_port'] |
523 |
|
524 |
return console
|
525 |
|
526 |
|
527 |
def get_instance_info(vm): |
528 |
with pooled_rapi_client(vm) as client: |
529 |
return client.GetInstanceInfo(vm.backend_vm_id)
|
530 |
|
531 |
|
532 |
def create_network(network, backend, connect=True): |
533 |
"""Create a network in a Ganeti backend"""
|
534 |
log.debug("Creating network %s in backend %s", network, backend)
|
535 |
|
536 |
job_id = _create_network(network, backend) |
537 |
|
538 |
if connect:
|
539 |
job_ids = connect_network(network, backend, depends=[job_id]) |
540 |
return job_ids
|
541 |
else:
|
542 |
return [job_id]
|
543 |
|
544 |
|
545 |
def _create_network(network, backend): |
546 |
"""Create a network."""
|
547 |
|
548 |
network_type = network.public and 'public' or 'private' |
549 |
|
550 |
tags = network.backend_tag |
551 |
if network.dhcp:
|
552 |
tags.append('nfdhcpd')
|
553 |
|
554 |
if network.public:
|
555 |
conflicts_check = True
|
556 |
else:
|
557 |
conflicts_check = False
|
558 |
|
559 |
try:
|
560 |
bn = BackendNetwork.objects.get(network=network, backend=backend) |
561 |
mac_prefix = bn.mac_prefix |
562 |
except BackendNetwork.DoesNotExist:
|
563 |
raise Exception("BackendNetwork for network '%s' in backend '%s'" |
564 |
" does not exist" % (network.id, backend.id))
|
565 |
|
566 |
with pooled_rapi_client(backend) as client: |
567 |
return client.CreateNetwork(network_name=network.backend_id,
|
568 |
network=network.subnet, |
569 |
network6=network.subnet6, |
570 |
gateway=network.gateway, |
571 |
gateway6=network.gateway6, |
572 |
network_type=network_type, |
573 |
mac_prefix=mac_prefix, |
574 |
conflicts_check=conflicts_check, |
575 |
tags=tags) |
576 |
|
577 |
|
578 |
def connect_network(network, backend, depends=[], group=None): |
579 |
"""Connect a network to nodegroups."""
|
580 |
log.debug("Connecting network %s to backend %s", network, backend)
|
581 |
|
582 |
if network.public:
|
583 |
conflicts_check = True
|
584 |
else:
|
585 |
conflicts_check = False
|
586 |
|
587 |
depends = [[job, ["success", "error", "canceled"]] for job in depends] |
588 |
with pooled_rapi_client(backend) as client: |
589 |
groups = [group] if group is not None else client.GetGroups() |
590 |
job_ids = [] |
591 |
for group in groups: |
592 |
job_id = client.ConnectNetwork(network.backend_id, group, |
593 |
network.mode, network.link, |
594 |
conflicts_check, |
595 |
depends=depends) |
596 |
job_ids.append(job_id) |
597 |
return job_ids
|
598 |
|
599 |
|
600 |
def delete_network(network, backend, disconnect=True): |
601 |
log.debug("Deleting network %s from backend %s", network, backend)
|
602 |
|
603 |
depends = [] |
604 |
if disconnect:
|
605 |
depends = disconnect_network(network, backend) |
606 |
_delete_network(network, backend, depends=depends) |
607 |
|
608 |
|
609 |
def _delete_network(network, backend, depends=[]): |
610 |
depends = [[job, ["success", "error", "canceled"]] for job in depends] |
611 |
with pooled_rapi_client(backend) as client: |
612 |
return client.DeleteNetwork(network.backend_id, depends)
|
613 |
|
614 |
|
615 |
def disconnect_network(network, backend, group=None): |
616 |
log.debug("Disconnecting network %s to backend %s", network, backend)
|
617 |
|
618 |
with pooled_rapi_client(backend) as client: |
619 |
groups = [group] if group is not None else client.GetGroups() |
620 |
job_ids = [] |
621 |
for group in groups: |
622 |
job_id = client.DisconnectNetwork(network.backend_id, group) |
623 |
job_ids.append(job_id) |
624 |
return job_ids
|
625 |
|
626 |
|
627 |
def connect_to_network(vm, network, address=None): |
628 |
backend = vm.backend |
629 |
network = Network.objects.select_for_update().get(id=network.id) |
630 |
bnet, created = BackendNetwork.objects.get_or_create(backend=backend, |
631 |
network=network) |
632 |
depend_jobs = [] |
633 |
if bnet.operstate != "ACTIVE": |
634 |
depend_jobs = create_network(network, backend, connect=True)
|
635 |
|
636 |
depends = [[job, ["success", "error", "canceled"]] for job in depend_jobs] |
637 |
|
638 |
nic = {'ip': address, 'network': network.backend_id} |
639 |
|
640 |
log.debug("Connecting vm %s to network %s(%s)", vm, network, address)
|
641 |
|
642 |
with pooled_rapi_client(vm) as client: |
643 |
return client.ModifyInstance(vm.backend_vm_id, nics=[('add', nic)], |
644 |
hotplug=vm.backend.use_hotplug(), |
645 |
depends=depends, |
646 |
dry_run=settings.TEST) |
647 |
|
648 |
|
649 |
def disconnect_from_network(vm, nic): |
650 |
op = [('remove', nic.index, {})]
|
651 |
|
652 |
log.debug("Removing nic of VM %s, with index %s", vm, str(nic.index)) |
653 |
|
654 |
with pooled_rapi_client(vm) as client: |
655 |
return client.ModifyInstance(vm.backend_vm_id, nics=op,
|
656 |
hotplug=vm.backend.use_hotplug(), |
657 |
dry_run=settings.TEST) |
658 |
|
659 |
|
660 |
def set_firewall_profile(vm, profile): |
661 |
try:
|
662 |
tag = _firewall_tags[profile] |
663 |
except KeyError: |
664 |
raise ValueError("Unsopported Firewall Profile: %s" % profile) |
665 |
|
666 |
log.debug("Setting tag of VM %s to %s", vm, profile)
|
667 |
|
668 |
with pooled_rapi_client(vm) as client: |
669 |
# Delete all firewall tags
|
670 |
for t in _firewall_tags.values(): |
671 |
client.DeleteInstanceTags(vm.backend_vm_id, [t], |
672 |
dry_run=settings.TEST) |
673 |
|
674 |
client.AddInstanceTags(vm.backend_vm_id, [tag], dry_run=settings.TEST) |
675 |
|
676 |
# XXX NOP ModifyInstance call to force process_net_status to run
|
677 |
# on the dispatcher
|
678 |
os_name = settings.GANETI_CREATEINSTANCE_KWARGS['os']
|
679 |
client.ModifyInstance(vm.backend_vm_id, |
680 |
os_name=os_name) |
681 |
|
682 |
|
683 |
def get_instances(backend, bulk=True): |
684 |
with pooled_rapi_client(backend) as c: |
685 |
return c.GetInstances(bulk=bulk)
|
686 |
|
687 |
|
688 |
def get_nodes(backend, bulk=True): |
689 |
with pooled_rapi_client(backend) as c: |
690 |
return c.GetNodes(bulk=bulk)
|
691 |
|
692 |
|
693 |
def get_jobs(backend): |
694 |
with pooled_rapi_client(backend) as c: |
695 |
return c.GetJobs()
|
696 |
|
697 |
|
698 |
def get_physical_resources(backend): |
699 |
""" Get the physical resources of a backend.
|
700 |
|
701 |
Get the resources of a backend as reported by the backend (not the db).
|
702 |
|
703 |
"""
|
704 |
nodes = get_nodes(backend, bulk=True)
|
705 |
attr = ['mfree', 'mtotal', 'dfree', 'dtotal', 'pinst_cnt', 'ctotal'] |
706 |
res = {} |
707 |
for a in attr: |
708 |
res[a] = 0
|
709 |
for n in nodes: |
710 |
# Filter out drained, offline and not vm_capable nodes since they will
|
711 |
# not take part in the vm allocation process
|
712 |
can_host_vms = n['vm_capable'] and not (n['drained'] or n['offline']) |
713 |
if can_host_vms and n['cnodes']: |
714 |
for a in attr: |
715 |
res[a] += int(n[a])
|
716 |
return res
|
717 |
|
718 |
|
719 |
def update_resources(backend, resources=None): |
720 |
""" Update the state of the backend resources in db.
|
721 |
|
722 |
"""
|
723 |
|
724 |
if not resources: |
725 |
resources = get_physical_resources(backend) |
726 |
|
727 |
backend.mfree = resources['mfree']
|
728 |
backend.mtotal = resources['mtotal']
|
729 |
backend.dfree = resources['dfree']
|
730 |
backend.dtotal = resources['dtotal']
|
731 |
backend.pinst_cnt = resources['pinst_cnt']
|
732 |
backend.ctotal = resources['ctotal']
|
733 |
backend.updated = datetime.now() |
734 |
backend.save() |
735 |
|
736 |
|
737 |
def get_memory_from_instances(backend): |
738 |
""" Get the memory that is used from instances.
|
739 |
|
740 |
Get the used memory of a backend. Note: This is different for
|
741 |
the real memory used, due to kvm's memory de-duplication.
|
742 |
|
743 |
"""
|
744 |
with pooled_rapi_client(backend) as client: |
745 |
instances = client.GetInstances(bulk=True)
|
746 |
mem = 0
|
747 |
for i in instances: |
748 |
mem += i['oper_ram']
|
749 |
return mem
|
750 |
|
751 |
##
|
752 |
## Synchronized operations for reconciliation
|
753 |
##
|
754 |
|
755 |
|
756 |
def create_network_synced(network, backend): |
757 |
result = _create_network_synced(network, backend) |
758 |
if result[0] != 'success': |
759 |
return result
|
760 |
result = connect_network_synced(network, backend) |
761 |
return result
|
762 |
|
763 |
|
764 |
def _create_network_synced(network, backend): |
765 |
with pooled_rapi_client(backend) as client: |
766 |
job = _create_network(network, backend) |
767 |
result = wait_for_job(client, job) |
768 |
return result
|
769 |
|
770 |
|
771 |
def connect_network_synced(network, backend): |
772 |
with pooled_rapi_client(backend) as client: |
773 |
for group in client.GetGroups(): |
774 |
job = client.ConnectNetwork(network.backend_id, group, |
775 |
network.mode, network.link) |
776 |
result = wait_for_job(client, job) |
777 |
if result[0] != 'success': |
778 |
return result
|
779 |
|
780 |
return result
|
781 |
|
782 |
|
783 |
def wait_for_job(client, jobid): |
784 |
result = client.WaitForJobChange(jobid, ['status', 'opresult'], None, None) |
785 |
status = result['job_info'][0] |
786 |
while status not in ['success', 'error', 'cancel']: |
787 |
result = client.WaitForJobChange(jobid, ['status', 'opresult'], |
788 |
[result], None)
|
789 |
status = result['job_info'][0] |
790 |
|
791 |
if status == 'success': |
792 |
return (status, None) |
793 |
else:
|
794 |
error = result['job_info'][1] |
795 |
return (status, error)
|