76 lines
2.6 KiB
Python
76 lines
2.6 KiB
Python
# Copyright 2015 Cisco Systems, Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import log as logging
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LOG = logging.getLogger(__name__)
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class KBVMMappingAlgoNotSup(Exception):
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pass
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class KBVMPlacementAlgoNotSup(Exception):
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pass
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class KBScheduler(object):
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"""
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1. VM Placements
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2. Mapping client VMs to target servers
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"""
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@staticmethod
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def setup_vm_placement(role, vm_list, topology, avail_zone, algorithm):
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if not topology:
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# Will use nova-scheduler to pick up the hypervisors
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return
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if not avail_zone:
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# Default availability zone in NOVA
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avail_zone = "nova"
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if role == "Server":
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host_list = topology.servers_rack
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else:
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host_list = topology.clients_rack
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host_count = len(host_list)
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if algorithm == "Round-robin":
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host_idx = 0
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for ins in vm_list:
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ins.boot_info['avail_zone'] = "%s:%s" % (avail_zone, host_list[host_idx])
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host_idx = (host_idx + 1) % host_count
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else:
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LOG.error("Unsupported algorithm!")
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raise KBVMPlacementAlgoNotSup()
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@staticmethod
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def setup_vm_mappings(client_list, server_list, algorithm):
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# VM Mapping framework/algorithm to mapping clients to servers.
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# e.g. 1:1 mapping, 1:n mapping, n:1 mapping, etc.
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# Here we only support N*1:1, i.e. 1 client VM maps to 1 server VM, total of N pairs.
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if algorithm == "1:1":
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for idx, ins in enumerate(client_list):
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ins.target_url = "http://%s/index.html" %\
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(server_list[idx].fip_ip or server_list[idx].fixed_ip)
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ins.user_data['target_url'] = ins.target_url
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elif algorithm == "1:n":
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# Right now only for multicast
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for idx, ins in enumerate(client_list):
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ins.target_url = server_list[0].fip_ip or server_list[0].fixed_ip
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ins.user_data['target_url'] = ins.target_url
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else:
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LOG.error("Unsupported algorithm!")
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raise KBVMMappingAlgoNotSup()
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