/
vnc_pod.py
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/
vnc_pod.py
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#
# Copyright (c) 2016 Juniper Networks, Inc. All rights reserved.
#
"""
VNC pod management for kubernetes
"""
from vnc_api.vnc_api import *
from config_db import *
from kube_manager.common.kube_config_db import NamespaceKM
class VncPod(object):
def __init__(self, vnc_lib=None, label_cache=None, service_mgr=None,
svc_fip_pool = None):
self._vnc_lib = vnc_lib
self._label_cache = label_cache
self._service_mgr = service_mgr
self._service_fip_pool = svc_fip_pool
def _get_network(self, pod_id, pod_namespace):
"""
Get network corresponding to this namesapce.
"""
vn_fq_name = None
if self._is_pod_network_isolated(pod_namespace) == True:
ns = self._get_namespace(pod_namespace)
if ns:
vn_fq_name = ns.get_network_fq_name()
# If no network was found on the namesapce, default to the cluster
# pod network.
if not vn_fq_name:
vn_fq_name = ['default-domain', 'default', 'cluster-network']
vn_obj = self._vnc_lib.virtual_network_read(fq_name=vn_fq_name)
return vn_obj
def _get_namespace(self, pod_namespace):
return NamespaceKM.find_by_name_or_uuid(pod_namespace)
def _is_pod_network_isolated(self, pod_namespace):
return self._get_namespace(pod_namespace).is_isolated()
def _create_iip(self, pod_name, vn_obj, vmi_obj):
iip_obj = InstanceIp(name=pod_name)
iip_obj.add_virtual_network(vn_obj)
iip_obj.add_virtual_machine_interface(vmi_obj)
try:
self._vnc_lib.instance_ip_create(iip_obj)
except RefsExistError:
self._vnc_lib.instance_ip_update(iip_obj)
InstanceIpKM.locate(iip_obj.uuid)
return iip_obj
def _create_cluster_service_fip(self, pod_name, vmi_obj):
"""
Isolated Pods in the cluster will be allocated a floating ip
from the cluster service network, so that the pods can talk
to cluster services.
"""
if not self._service_fip_pool:
return
# Construct parent ref.
fip_pool_obj = FloatingIpPool()
fip_pool_obj.uuid = self._service_fip_pool.uuid
fip_pool_obj.fq_name = self._service_fip_pool.fq_name
fip_pool_obj.name = self._service_fip_pool.name
# Create Floating-Ip object.
fip_obj = FloatingIp(name="cluster-svc-fip-%s"% (pod_name),
parent_obj=fip_pool_obj,
floating_ip_traffic_direction='egress')
fip_obj.set_virtual_machine_interface(vmi_obj)
try:
fip_uuid = self._vnc_lib.floating_ip_create(fip_obj)
except RefsExistError:
fip_uuid = self._vnc_lib.floating_ip_update(fip_obj)
# Cached service floating ip.
FloatingIpKM.locate(fip_uuid)
return
def _create_vmi(self, pod_name, pod_namespace, vm_obj, vn_obj):
proj_fq_name = ['default-domain', pod_namespace]
proj_obj = self._vnc_lib.project_read(fq_name=proj_fq_name)
vmi_obj = VirtualMachineInterface(name=pod_name, parent_obj=proj_obj)
vmi_obj.set_virtual_network(vn_obj)
vmi_obj.set_virtual_machine(vm_obj)
try:
self._vnc_lib.virtual_machine_interface_create(vmi_obj)
except RefsExistError:
self._vnc_lib.virtual_machine_interface_update(vmi_obj)
VirtualMachineInterfaceKM.locate(vmi_obj.uuid)
return vmi_obj
def associate_pod_to_services(self, labels, pod_id):
for label in labels.items():
key = self._label_cache._get_key(label)
self._label_cache._locate_label(key,
self._label_cache.pod_label_cache, label, pod_id)
service_ids = self._label_cache.service_selector_cache.get(key, [])
for service_id in service_ids:
self._service_mgr.add_pod_to_service(service_id, pod_id)
def disassociate_pod_from_services(self, pod_id, labels):
for label in labels.items():
key = self._label_cache._get_key(label)
service_ids = self._label_cache.service_selector_cache.get(key, [])
for service_id in service_ids:
self._service_mgr.remove_pod_from_service(service_id, pod_id)
self._label_cache._remove_label(key,
self._label_cache.pod_label_cache, label, pod_id)
def _create_vm(self, pod_id, pod_name, labels):
vm_obj = VirtualMachine(name=pod_name)
vm_obj.uuid = pod_id
try:
self._vnc_lib.virtual_machine_create(vm_obj)
except RefsExistError:
vm_obj = self._vnc_lib.virtual_machine_read(id=pod_id)
vm = VirtualMachineKM.locate(vm_obj.uuid)
vm.pod_labels = labels
return vm_obj
def _link_vm_to_node(self, vm_obj, pod_node):
vrouter_fq_name = ['default-global-system-config', pod_node]
try:
vrouter_obj = self._vnc_lib.virtual_router_read(fq_name=vrouter_fq_name)
except Exception as e:
return
self._vnc_lib.ref_update('virtual-router', vrouter_obj.uuid,
'virtual-machine', vm_obj.uuid, None, 'ADD')
vm = VirtualMachineKM.get(vm_obj.uuid)
if vm:
vm.virtual_router = vrouter_obj.uuid
def vnc_pod_add(self, pod_id, pod_name, pod_namespace, pod_node, labels):
vn_obj = self._get_network(pod_id, pod_namespace)
vm_obj = self._create_vm(pod_id, pod_name, labels)
vmi_obj = self._create_vmi(pod_name, pod_namespace, vm_obj, vn_obj)
self._create_iip(pod_name, vn_obj, vmi_obj)
if self._is_pod_network_isolated(pod_namespace):
self._create_cluster_service_fip(pod_name, vmi_obj)
self._link_vm_to_node(vm_obj, pod_node)
self.associate_pod_to_services(labels, pod_id)
def vnc_port_delete(self, vmi_id):
vmi = VirtualMachineInterfaceKM.get(vmi_id)
if not vmi:
return
for iip_id in list(vmi.instance_ips):
try:
self._vnc_lib.instance_ip_delete(id=iip_id)
except NoIdError:
pass
# Cleanup floating ip's on this interface.
for fip_id in list(vmi.floating_ips):
try:
self._vnc_lib.floating_ip_delete(id=fip_id)
except NoIdError:
pass
try:
self._vnc_lib.virtual_machine_interface_delete(id=vmi_id)
except NoIdError:
pass
def vnc_pod_delete(self, pod_id, pod_name, labels):
vm = VirtualMachineKM.get(pod_id)
if not vm:
return
if vm.virtual_router:
self._vnc_lib.ref_update('virtual-router', vm.virtual_router,
'virtual-machine', vm.uuid, None, 'DELETE')
self.disassociate_pod_from_services(pod_id, labels)
for vmi_id in list(vm.virtual_machine_interfaces):
self.vnc_port_delete(vmi_id)
try:
self._vnc_lib.virtual_machine_delete(id=pod_id)
except NoIdError:
pass
def process(self, event):
pod_id = event['object']['metadata'].get('uid')
pod_name = event['object']['metadata'].get('name')
pod_namespace = event['object']['metadata'].get('namespace')
labels = event['object']['metadata'].get('labels', {})
if event['type'] == 'ADDED' or event['type'] == 'MODIFIED':
pod_node = event['object']['spec'].get('nodeName')
host_network = event['object']['spec'].get('hostNetwork')
if host_network:
return
self.vnc_pod_add(pod_id, pod_name, pod_namespace,
pod_node, labels)
elif event['type'] == 'DELETED':
self.vnc_pod_delete(pod_id, pod_name, labels)