From 3444ae45d2b2819993cd972ffe6a572b61fce621 Mon Sep 17 00:00:00 2001 From: peusterm Date: Wed, 16 Mar 2016 20:46:41 +0100 Subject: [PATCH] WORKS! First dummy GK version that is ablte to deploy the example service package on the emulator. Some checks are missing and no chain setup done until now. --- src/emuvim/api/sonata/dummygatekeeper.py | 46 +++++++++++++++++++----- src/emuvim/dcemulator/node.py | 12 ++++--- 2 files changed, 44 insertions(+), 14 deletions(-) diff --git a/src/emuvim/api/sonata/dummygatekeeper.py b/src/emuvim/api/sonata/dummygatekeeper.py index c3694e5..68031e4 100644 --- a/src/emuvim/api/sonata/dummygatekeeper.py +++ b/src/emuvim/api/sonata/dummygatekeeper.py @@ -29,6 +29,7 @@ class Gatekeeper(object): def __init__(self): self.services = dict() self.dcs = dict() + self.vnf_counter = 0 # used to generate short names for VNFs (Mininet limitation) LOG.info("Create SONATA dummy gatekeeper.") def register_service_package(self, service_uuid, service): @@ -41,6 +42,10 @@ class Gatekeeper(object): # lets perform all steps needed to onboard the service service.onboard() + def get_next_vnf_name(self): + self.vnf_counter += 1 + return "sonvnf%d" % self.vnf_counter + class Service(object): """ @@ -82,18 +87,39 @@ class Service(object): LOG.info("On-boarded service: %r" % self.manifest.get("package_name")) def start_service(self): - # TODO implement method - # each service instance gets a new uuid to identify it + """ + This methods creates and starts a new service instance. + It computes placements, iterates over all VNFDs, and starts + each VNFD as a Docker container in the data center selected + by the placement algorithm. + :return: + """ + LOG.info("Starting service %r" % self.uuid) + # 1. each service instance gets a new uuid to identify it instance_uuid = str(uuid.uuid4()) - # compute placement of this service instance (adds DC names to VNFDs) + # build a instances dict (a bit like a NSR :)) + self.instances[instance_uuid] = dict() + self.instances[instance_uuid]["vnf_instances"] = list() + # 2. compute placement of this service instance (adds DC names to VNFDs) self._calculate_placement(FirstDcPlacement) - # 1. parse descriptors and get name of each docker container + # iterate over all vnfds that we have to start for vnfd in self.vnfds.itervalues(): + # iterate over all deployment units within each VNFDs for u in vnfd.get("virtual_deployment_units"): + # 3. get the name of the docker image to start and the assigned DC docker_name = u.get("vm_image") - # 2. do the corresponding dc.startCompute(name="foobar") calls - print "start %r" % docker_name - # 3. store references to the compute objects in self.instantiations + target_dc = vnfd.get("dc") + # 4. perform some checks to ensure we can start the container + assert(docker_name is not None) + assert(target_dc is not None) + if not self._check_docker_image_exists(docker_name): + raise Exception("Docker image %r not found. Abort." % docker_name) + # 5. do the dc.startCompute(name="foobar") call to run the container + # TODO consider flavors, and other annotations + vnfi = target_dc.startCompute(GK.get_next_vnf_name(), image=docker_name, flavor_name="small") + # 6. store references to the compute objects in self.instances + self.instances[instance_uuid]["vnf_instances"].append(vnfi) + LOG.info("Service started. Instance id: %r" % instance_uuid) return instance_uuid def _unpack_service_package(self): @@ -172,6 +198,10 @@ class Service(object): # TODO implement pass + def _check_docker_image_exists(self, image_name): + # TODO implement + return True + def _calculate_placement(self, algorithm): """ Do placement by adding the a field "dc" to @@ -258,9 +288,7 @@ class Instantiations(fr.Resource): json_data = request.get_json(force=True) service_uuid = list(GK.services.iterkeys())[0] #json_data.get("service_uuid") # TODO only for quick testing if service_uuid in GK.services: - LOG.info("Starting service %r" % service_uuid) service_instance_uuid = GK.services.get(service_uuid).start_service() - LOG.info("Service started. Instance id: %r" % service_instance_uuid) return {"service_instance_uuid": service_instance_uuid} return "Service not found", 404 diff --git a/src/emuvim/dcemulator/node.py b/src/emuvim/dcemulator/node.py index d9971c8..9ccdb7f 100755 --- a/src/emuvim/dcemulator/node.py +++ b/src/emuvim/dcemulator/node.py @@ -6,6 +6,9 @@ from mininet.node import Docker from mininet.link import Link import logging +LOG = logging.getLogger("dcemulator") +LOG.setLevel(logging.DEBUG) + DCDPID_BASE = 1000 # start of switch dpid's used for data center switches @@ -21,10 +24,9 @@ class EmulatorCompute(Docker): def __init__( self, name, dimage, **kwargs): - logging.debug("Create EmulatorCompute instance: %s" % name) self.datacenter = kwargs.get("datacenter") # pointer to current DC self.flavor_name = kwargs.get("flavor_name") - + LOG.debug("Starting compute instance %r in data center %r" % (name, str(self.datacenter))) # call original Docker.__init__ Docker.__init__(self, name, dimage, **kwargs) @@ -103,7 +105,7 @@ class Datacenter(object): """ self.switch = self.net.addSwitch( "%s.s1" % self.name, dpid=hex(self._get_next_dc_dpid())[2:]) - logging.debug("created data center switch: %s" % str(self.switch)) + LOG.debug("created data center switch: %s" % str(self.switch)) def start(self): pass @@ -138,7 +140,7 @@ class Datacenter(object): if self._resource_model is not None: # TODO pass resource limits to new container (cf. Dockernet API) Issue #47 (cpu_limit, mem_limit, disk_limit) = alloc = self._resource_model.allocate(name, flavor_name) - logging.info("Allocation result: %r" % str(alloc)) + LOG.debug("Allocation result: %r" % str(alloc)) # create the container d = self.net.addDocker( "%s" % (name), @@ -194,5 +196,5 @@ class Datacenter(object): raise Exception("There is already an resource model assigned to this DC.") self._resource_model = rm self.net.rm_registrar.register(self, rm) - logging.info("Assigned RM: %r to DC: %r" % (rm, self)) + LOG.info("Assigned RM: %r to DC: %r" % (rm, self)) -- 2.25.1