root / snf-cyclades-app / synnefo / logic / reconciliation.py @ 1ad47ca5
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#
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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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#
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"""Business logic for reconciliation
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Reconcile the contents of the DB with the actual state of the
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Ganeti backend.
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Let D be the set of VMs in the DB, G the set of VMs in Ganeti.
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RULES:
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R1. Stale servers in DB:
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For any v in D but not in G:
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Set deleted=True.
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R2. Orphan instances in Ganet:
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For any v in G with deleted=True in D:
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Issue OP_INSTANCE_DESTROY.
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R3. Unsynced operstate:
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For any v whose operating state differs between G and V:
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Set the operating state in D based on the state in G.
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In the code, D, G are Python dicts mapping instance ids to operating state.
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For D, the operating state is chosen from VirtualMachine.OPER_STATES.
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For G, the operating state is True if the machine is up, False otherwise.
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"""
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import logging |
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import sys |
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import itertools |
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from django.core.management import setup_environ |
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try:
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from synnefo import settings |
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except ImportError: |
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raise Exception("Cannot import settings, make sure PYTHONPATH contains " |
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"the parent directory of the Synnefo Django project.")
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setup_environ(settings) |
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from datetime import datetime, timedelta |
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from synnefo.db.models import (VirtualMachine, pooled_rapi_client) |
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from synnefo.logic.rapi import GanetiApiError |
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from synnefo.logic.backend import get_ganeti_instances, get_backends |
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from synnefo.logic import utils |
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log = logging.getLogger() |
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def stale_servers_in_db(D, G): |
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idD = set(D.keys())
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idG = set(G.keys())
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stale = set()
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for i in idD - idG: |
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if D[i] == 'BUILD': |
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vm = VirtualMachine.objects.get(id=i) |
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# Check time to avoid many rapi calls
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if datetime.now() > vm.backendtime + timedelta(seconds=5): |
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with pooled_rapi_client(vm) as c: |
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try:
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job_status = c.GetJobStatus(vm.backendjobid)['status']
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if job_status in ('queued', 'waiting', 'running'): |
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# Server is still building in Ganeti
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continue
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else:
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c.GetInstance(utils.id_to_instance_name(i)) |
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# Server has just been created in Ganeti
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continue
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except GanetiApiError:
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stale.add(i) |
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else:
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stale.add(i) |
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return stale
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def orphan_instances_in_ganeti(D, G): |
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idD = set(D.keys())
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idG = set(G.keys())
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return idG - idD
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def unsynced_operstate(D, G): |
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unsynced = set()
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idD = set(D.keys())
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idG = set(G.keys())
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for i in idD & idG: |
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if (G[i] and D[i] != 'STARTED' or |
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not G[i] and D[i] not in ('BUILD', 'ERROR', 'STOPPED')): |
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unsynced.add((i, D[i], G[i])) |
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if not G[i] and D[i] == 'BUILD': |
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vm = VirtualMachine.objects.get(id=i) |
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# Check time to avoid many rapi calls
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if datetime.now() > vm.backendtime + timedelta(seconds=5): |
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with pooled_rapi_client(vm) as c: |
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try:
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job_info = c.GetJobStatus(job_id=vm.backendjobid) |
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if job_info['status'] == 'success': |
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unsynced.add((i, D[i], G[i])) |
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except GanetiApiError:
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pass
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return unsynced
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def instances_with_build_errors(D, G): |
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failed = set()
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idD = set(D.keys())
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idG = set(G.keys())
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for i in idD & idG: |
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if not G[i] and D[i] == 'BUILD': |
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vm = VirtualMachine.objects.get(id=i) |
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if not vm.backendjobid: # VM has not been enqueued in the backend |
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if datetime.now() > vm.created + timedelta(seconds=120): |
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# If a job has not been enqueued after 2 minutues, then
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# it must be a stale entry..
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failed.add(i) |
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elif datetime.now() > vm.backendtime + timedelta(seconds=30): |
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# Check time to avoid many rapi calls
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with pooled_rapi_client(vm) as c: |
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try:
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job_info = c.GetJobStatus(job_id=vm.backendjobid) |
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if job_info['status'] == 'error': |
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failed.add(i) |
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except GanetiApiError:
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failed.add(i) |
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return failed
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def get_servers_from_db(backend=None): |
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backends = get_backends(backend) |
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vms = VirtualMachine.objects.filter(deleted=False, backend__in=backends)
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return dict(map(lambda x: (x.id, x.operstate), vms)) |
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def get_instances_from_ganeti(backend=None): |
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ganeti_instances = get_ganeti_instances(backend=backend, bulk=True)
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snf_instances = {} |
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snf_nics = {} |
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prefix = settings.BACKEND_PREFIX_ID |
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for i in ganeti_instances: |
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if i['name'].startswith(prefix): |
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try:
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id = utils.id_from_instance_name(i['name'])
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except Exception: |
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log.error("Ignoring instance with malformed name %s",
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i['name'])
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continue
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if id in snf_instances: |
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log.error("Ignoring instance with duplicate Synnefo id %s",
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i['name'])
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continue
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snf_instances[id] = i['oper_state'] |
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snf_nics[id] = get_nics_from_instance(i)
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return snf_instances, snf_nics
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#
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# Nics
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#
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def get_nics_from_ganeti(backend=None): |
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"""Get network interfaces for each ganeti instance.
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"""
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instances = get_ganeti_instances(backend=backend, bulk=True)
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prefix = settings.BACKEND_PREFIX_ID |
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snf_instances_nics = {} |
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for i in instances: |
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if i['name'].startswith(prefix): |
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try:
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id = utils.id_from_instance_name(i['name'])
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except Exception: |
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log.error("Ignoring instance with malformed name %s",
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i['name'])
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continue
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if id in snf_instances_nics: |
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log.error("Ignoring instance with duplicate Synnefo id %s",
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i['name'])
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continue
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snf_instances_nics[id] = get_nics_from_instance(i)
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return snf_instances_nics
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def get_nics_from_instance(i): |
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ips = zip(itertools.repeat('ipv4'), i['nic.ips']) |
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macs = zip(itertools.repeat('mac'), i['nic.macs']) |
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networks = zip(itertools.repeat('network'), i['nic.networks']) |
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# modes = zip(itertools.repeat('mode'), i['nic.modes'])
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# links = zip(itertools.repeat('link'), i['nic.links'])
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# nics = zip(ips,macs,modes,networks,links)
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nics = zip(ips, macs, networks)
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nics = map(lambda x: dict(x), nics) |
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nics = dict(enumerate(nics)) |
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return nics
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def get_nics_from_db(backend=None): |
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"""Get network interfaces for each vm in DB.
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"""
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backends = get_backends(backend) |
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instances = VirtualMachine.objects.filter(deleted=False,
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backend__in=backends) |
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instances_nics = {} |
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for instance in instances: |
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nics = {} |
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for n in instance.nics.all(): |
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ipv4 = n.ipv4 |
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nic = {'mac': n.mac,
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'network': n.network.backend_id,
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'ipv4': ipv4 if ipv4 != '' else None |
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} |
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nics[n.index] = nic |
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instances_nics[instance.id] = nics |
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return instances_nics
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def unsynced_nics(DBNics, GNics): |
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"""Find unsynced network interfaces between DB and Ganeti.
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@ rtype: dict; {instance_id: ganeti_nics}
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@ return Dictionary containing the instances ids that have unsynced network
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interfaces between DB and Ganeti and the network interfaces in Ganeti.
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"""
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idD = set(DBNics.keys())
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idG = set(GNics.keys())
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unsynced = {} |
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for i in idD & idG: |
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nicsD = DBNics[i] |
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nicsG = GNics[i] |
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if len(nicsD) != len(nicsG): |
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unsynced[i] = (nicsD, nicsG) |
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continue
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for index in nicsG.keys(): |
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nicD = nicsD[index] |
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nicG = nicsG[index] |
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if (nicD['ipv4'] != nicG['ipv4'] or |
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nicD['mac'] != nicG['mac'] or |
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nicD['network'] != nicG['network']): |
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unsynced[i] = (nicsD, nicsG) |
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break
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return unsynced
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#
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# Networks
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#
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def get_networks_from_ganeti(backend): |
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prefix = settings.BACKEND_PREFIX_ID + 'net-'
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networks = {} |
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with pooled_rapi_client(backend) as c: |
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for net in c.GetNetworks(bulk=True): |
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if net['name'].startswith(prefix): |
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id = utils.id_from_network_name(net['name'])
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networks[id] = net
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return networks
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def hanging_networks(backend, GNets): |
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"""Get networks that are not connected to all Nodegroups.
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"""
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def get_network_groups(group_list): |
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groups = set()
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for g in group_list: |
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g_name = g.split('(')[0] |
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groups.add(g_name) |
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return groups
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with pooled_rapi_client(backend) as c: |
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groups = set(c.GetGroups())
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hanging = {} |
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for id, info in GNets.items(): |
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group_list = get_network_groups(info['group_list'])
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if group_list != groups:
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hanging[id] = groups - group_list
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return hanging
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# Only for testing this module individually
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def main(): |
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print get_instances_from_ganeti()
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if __name__ == "__main__": |
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sys.exit(main()) |