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OpenStack Study: fping.py**** CubicPower OpenStack Study ****
# Copyright 2011 Grid Dynamics # Copyright 2011 OpenStack Foundation # All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. import itertools import os from oslo.config import cfg from webob import exc from nova.api.openstack import common from nova.api.openstack import extensions from nova import compute from nova import exception from nova.openstack.common.gettextutils import _ from nova import utils authorize = extensions.extension_authorizer('compute', 'fping') authorize_all_tenants = extensions.extension_authorizer( 'compute', 'fping:all_tenants') fping_opts = [ cfg.StrOpt("fping_path", default="/usr/sbin/fping", help="Full path to fping."), ] CONF = cfg.CONF CONF.register_opts(fping_opts)
**** CubicPower OpenStack Study **** class FpingController(object):
**** CubicPower OpenStack Study **** def __init__(self, network_api=None): self.compute_api = compute.API() self.last_call = {}
**** CubicPower OpenStack Study **** def check_fping(self): if not os.access(CONF.fping_path, os.X_OK): raise exc.HTTPServiceUnavailable( explanation=_("fping utility is not found.")) @staticmethod
**** CubicPower OpenStack Study **** def fping(ips): fping_ret = utils.execute(CONF.fping_path, *ips, check_exit_code=False) if not fping_ret: return set() alive_ips = set() for line in fping_ret[0].split("\n"): ip = line.split(" ", 1)[0] if "alive" in line: alive_ips.add(ip) return alive_ips @staticmethod
**** CubicPower OpenStack Study **** def _get_instance_ips(context, instance): ret = [] for network in common.get_networks_for_instance( context, instance).values(): all_ips = itertools.chain(network["ips"], network["floating_ips"]) ret += [ip["address"] for ip in all_ips] return ret
**** CubicPower OpenStack Study **** def index(self, req): context = req.environ["nova.context"] search_opts = dict(deleted=False) if "all_tenants" in req.GET: authorize_all_tenants(context) else: authorize(context) if context.project_id: search_opts["project_id"] = context.project_id else: search_opts["user_id"] = context.user_id self.check_fping() include = req.GET.get("include", None) if include: include = set(include.split(",")) exclude = set() else: include = None exclude = req.GET.get("exclude", None) if exclude: exclude = set(exclude.split(",")) else: exclude = set() instance_list = self.compute_api.get_all( context, search_opts=search_opts) ip_list = [] instance_ips = {} instance_projects = {} for instance in instance_list: uuid = instance["uuid"] if uuid in exclude or (include is not None and uuid not in include): continue ips = [str(ip) for ip in self._get_instance_ips(context, instance)] instance_ips[uuid] = ips instance_projects[uuid] = instance["project_id"] ip_list += ips alive_ips = self.fping(ip_list) res = [] for instance_uuid, ips in instance_ips.iteritems(): res.append({ "id": instance_uuid, "project_id": instance_projects[instance_uuid], "alive": bool(set(ips) & alive_ips), }) return {"servers": res}
**** CubicPower OpenStack Study **** def show(self, req, id): try: context = req.environ["nova.context"] authorize(context) self.check_fping() instance = self.compute_api.get(context, id) ips = [str(ip) for ip in self._get_instance_ips(context, instance)] alive_ips = self.fping(ips) return { "server": { "id": instance["uuid"], "project_id": instance["project_id"], "alive": bool(set(ips) & alive_ips), } } except exception.NotFound: raise exc.HTTPNotFound()
**** CubicPower OpenStack Study **** class Fping(extensions.ExtensionDescriptor): """Fping Management Extension.""" name = "Fping" alias = "os-fping" namespace = "http://docs.openstack.org/compute/ext/fping/api/v1.1" updated = "2012-07-06T00:00:00+00:00"
**** CubicPower OpenStack Study **** def get_resources(self): res = extensions.ResourceExtension( "os-fping", FpingController()) return [res]
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