root / logic / callbacks.py @ f2bdb9ab
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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 without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and documentation are
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# those of the authors and should not be interpreted as representing official
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# policies, either expressed or implied, of GRNET S.A.
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# Callback functions used by the dispatcher to process incoming notifications
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# from AMQP queues.
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import socket |
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import traceback |
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import json |
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import sys |
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from synnefo.db.models import VirtualMachine |
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from synnefo.logic import utils, backend, email_send, log |
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_logger = log.get_logger("synnefo.dispatcher")
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def update_db(message): |
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"""Process the status of a VM based on a ganeti status message"""
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_logger.debug("Processing ganeti-op-status msg: %s", message.body)
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try:
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msg = _parse_json(message.body) |
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if msg["type"] != "ganeti-op-status": |
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_logger.error("Message is of unknown type %s.", msg["type"]) |
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return
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if msg["operation"] == "OP_INSTANCE_QUERY_DATA": |
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return status_job_finished(message)
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vmid = utils.id_from_instance_name(msg["instance"])
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vm = VirtualMachine.objects.get(id=vmid) |
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backend.process_op_status(vm, msg["jobId"], msg["operation"], |
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msg["status"], msg["logmsg"]) |
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_logger.debug("Done processing ganeti-op-status msg for vm %s.",
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msg["instance"])
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message.channel.basic_ack(message.delivery_tag) |
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except KeyError: |
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_logger.error("Malformed incoming JSON, missing attributes: %s",
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message.body) |
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except VirtualMachine.InvalidBackendIdError:
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_logger.debug("Ignoring msg for unknown instance %s.",
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msg["instance"])
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except VirtualMachine.DoesNotExist:
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_logger.error("VM for instance %s with id %d not found in DB.",
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msg["instance"], vmid)
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except Exception as e: |
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_logger.exception("Unexpected error")
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def update_net(message): |
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"""Process a network status update notification from Ganeti"""
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_logger.debug("Processing ganeti-net-status msg: %s", message.body)
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try:
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msg = _parse_json(message.body) |
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if msg["type"] != "ganeti-net-status": |
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_logger.error("Message is of unknown type %s", msg["type"]) |
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return
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vmid = utils.id_from_instance_name(msg["instance"])
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vm = VirtualMachine.objects.get(id=vmid) |
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backend.process_net_status(vm, msg["nics"])
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_logger.debug("Done processing ganeti-net-status msg for vm %s.",
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msg["instance"])
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message.channel.basic_ack(message.delivery_tag) |
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except KeyError: |
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_logger.error("Malformed incoming JSON, missing attributes: %s",
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message.body) |
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except VirtualMachine.InvalidBackendIdError:
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_logger.debug("Ignoring msg for unknown instance %s.",
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msg["instance"])
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except VirtualMachine.DoesNotExist:
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_logger.error("VM for instance %s with id %d not found in DB.",
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msg["instance"], vmid)
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except Exception as e: |
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_logger.exception("Unexpected error")
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def send_email(message): |
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"""Process an email submission request"""
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try:
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msg = json.loads(message.body) |
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sent = email_send.send(sender=msg['frm'], recipient = msg['to'], |
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body=msg['body'], subject=msg['subject']) |
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if not sent: |
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_logger.warn("Failed to send email to %s", msg['to']) |
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else:
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message.channel.basic_ack(message.delivery_tag) |
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except KeyError: |
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_logger.error("Malformed incoming JSON, missing attributes: %s",
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message.body) |
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except socket.error as e: |
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_logger.error("Cannot connect to SMTP server:%s\n", e)
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except Exception as e: |
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_logger.exception("Unexpected error")
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raise
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def update_credits(message): |
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_logger.debug("Request to update credits")
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message.channel.basic_ack(message.delivery_tag) |
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def trigger_status_update(message): |
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"""
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Triggers a status update job for a specific VM id.
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"""
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_logger.debug("Request to trigger status update: %s", message.body)
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try:
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msg = _parse_json(message.body) |
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if msg["type"] != "reconcile": |
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_logger.error("Message is of unknown type %s", msg["type"]) |
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return
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if msg["vmid"] == "": |
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_logger.error("Reconciliate message does not specify a VM id")
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return
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vm = VirtualMachine.objects.get(id=msg["vmid"])
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backend.request_status_update(vm) |
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message.channel.basic_ack(message.delivery_tag) |
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except KeyError as k: |
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_logger.error("Malformed incoming JSON, missing attributes: %s", k)
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except Exception as e: |
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_logger.exception("Unexpected error")
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def status_job_finished (message): |
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"""
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Updates VM status based on a previously sent status update request
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"""
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try:
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msg = _parse_json(message.body) |
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if msg["operation"] != 'OP_INSTANCE_QUERY_DATA': |
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_logger.error("Message is of unknown type %s", msg["operation"]) |
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return
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if msg["status"] != "success": |
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_logger.warn("Ignoring non-success status update from job %d on VM %s",
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msg['jobId'], msg['instance']) |
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message.channel.basic_ack(message.delivery_tag) |
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return
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status = backend.get_job_status(msg['jobId'])
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_logger.debug("Node status job result: %s" % status)
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if status['summary'][0] != u'INSTANCE_QUERY_DATA': |
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_logger.error("Status update is of unknown type %s", status['summary']) |
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return
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conf_state = status['opresult'][0][msg['instance']]['config_state'] |
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run_state = status['opresult'][0][msg['instance']]['run_state'] |
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# XXX: The following assumes names like snf-12
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instid = msg['instance'].split('-')[1] |
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vm = VirtualMachine.objects.get(id = instid) |
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if run_state == "up": |
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opcode = "OP_INSTANCE_REBOOT"
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else:
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opcode = "OP_INSTANCE_SHUTDOWN"
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backend.process_op_status(vm=vm, jobid=msg['jobId'],opcode=opcode,
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status="success",
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logmsg="Reconciliation: simulated event")
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message.channel.basic_ack(message.delivery_tag) |
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except KeyError as k: |
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_logger.error("Malformed incoming JSON, missing attributes: %s", k)
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except Exception as e: |
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_logger.exception("Unexpected error")
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def dummy_proc(message): |
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try:
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msg = _logger.debug(message.body) |
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_logger.debug("Msg (exchange:%s) ", msg)
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message.channel.basic_ack(message.delivery_tag) |
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except Exception as e: |
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_logger.error("Could not receive message %s" % e.message)
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pass
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def _parse_json(data): |
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try:
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return json.loads(data)
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except Exception as e: |
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_logger.error("Could not parse JSON file: %s", e)
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raise
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