openstack/net-virt/src/main/java/org/opendaylight/ovsdb/openstack/netvirt/LBaaSPoolMemberHandler.java

   1 /*
   2  * Copyright (C) 2014 SDN Hub, LLC.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Authors : Srini Seetharaman
   9  */
  10
  11 package org.opendaylight.ovsdb.openstack.netvirt;
  12
  13 import org.opendaylight.controller.networkconfig.neutron.INeutronLoadBalancerCRUD;
  14 import org.opendaylight.controller.networkconfig.neutron.INeutronLoadBalancerPoolCRUD;
  15 import org.opendaylight.controller.networkconfig.neutron.INeutronLoadBalancerPoolMemberAware;
  16 import org.opendaylight.controller.networkconfig.neutron.INeutronPortCRUD;
  17 import org.opendaylight.controller.networkconfig.neutron.NeutronLoadBalancer;
  18 import org.opendaylight.controller.networkconfig.neutron.NeutronLoadBalancerPool;
  19 import org.opendaylight.controller.networkconfig.neutron.NeutronLoadBalancerPoolMember;
  20 import org.opendaylight.controller.sal.core.Node;
  21 import org.opendaylight.controller.switchmanager.ISwitchManager;
  22 import org.opendaylight.ovsdb.openstack.netvirt.api.Action;
  23 import org.opendaylight.ovsdb.openstack.netvirt.api.LoadBalancerConfiguration;
  24 import org.opendaylight.ovsdb.openstack.netvirt.api.LoadBalancerProvider;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 import com.google.common.base.Preconditions;
  29
  30 import java.net.HttpURLConnection;
  31 import java.util.List;
  32
  33 /**
  34  * Handle requests for OpenStack Neutron v2.0 LBaaS API calls for
  35  * /v2.0/pools/{pool_id}/members
  36  */
  37
  38 public class LBaaSPoolMemberHandler extends AbstractHandler
  39         implements INeutronLoadBalancerPoolMemberAware {
  40
  41     private static final Logger logger = LoggerFactory.getLogger(LBaaSPoolMemberHandler.class);
  42
  43     // The implementation for each of these services is resolved by the OSGi Service Manager
  44     private volatile INeutronLoadBalancerPoolCRUD neutronLBPoolCache;
  45     private volatile INeutronLoadBalancerCRUD neutronLBCache;
  46     private volatile INeutronPortCRUD neutronPortsCache;
  47     private volatile LoadBalancerProvider loadBalancerProvider;
  48     private volatile ISwitchManager switchManager;
  49
  50     @Override
  51     public int canCreateNeutronLoadBalancerPoolMember(NeutronLoadBalancerPoolMember neutronLBPoolMember) {
  52         LoadBalancerConfiguration lbConfig = extractLBConfiguration(neutronLBPoolMember);
  53         if (lbConfig == null)
  54             return HttpURLConnection.HTTP_BAD_REQUEST;
  55         else if (!lbConfig.isValid())
  56             return HttpURLConnection.HTTP_NOT_ACCEPTABLE;
  57         else
  58             return HttpURLConnection.HTTP_OK;
  59     }
  60
  61     /**
  62      * Assuming that the pool information is fully populated before this call is made,
  63      * we go with creating the LoadBalancerConfiguration object for this call with
  64      * all information that is necessary to insert flow_mods
  65      */
  66     @Override
  67     public void neutronLoadBalancerPoolMemberCreated(NeutronLoadBalancerPoolMember neutronLBPoolMember) {
  68         logger.debug("Neutron LB Pool Member Creation : {}", neutronLBPoolMember.toString());
  69         enqueueEvent(new NorthboundEvent(neutronLBPoolMember, Action.ADD));
  70     }
  71
  72     private void doNeutronLoadBalancerPoolMemberCreate(NeutronLoadBalancerPoolMember neutronLBPoolMember) {
  73         Preconditions.checkNotNull(loadBalancerProvider);
  74         LoadBalancerConfiguration lbConfig = extractLBConfiguration(neutronLBPoolMember);
  75         if (lbConfig == null) {
  76             logger.trace("Neutron LB configuration invalid for member {} ", neutronLBPoolMember.getPoolMemberAddress());
  77         }
  78         else if (!lbConfig.isValid()) {
  79             logger.trace("Neutron LB pool configuration invalid for {} ", lbConfig.getName());
  80         } else {
  81             for (Node node: this.switchManager.getNodes())
  82                 loadBalancerProvider.programLoadBalancerPoolMemberRules(node, lbConfig,
  83                         lbConfig.getMembers().get(neutronLBPoolMember.getPoolMemberID()), Action.ADD);
  84         }
  85     }
  86
  87     @Override
  88     public int canUpdateNeutronLoadBalancerPoolMember(NeutronLoadBalancerPoolMember delta, NeutronLoadBalancerPoolMember original) {
  89         return HttpURLConnection.HTTP_OK;
  90     }
  91
  92     @Override
  93     public void neutronLoadBalancerPoolMemberUpdated(NeutronLoadBalancerPoolMember neutronLBPoolMember) {
  94         enqueueEvent(new NorthboundEvent(neutronLBPoolMember, Action.UPDATE));
  95         return;
  96     }
  97
  98     @Override
  99     public int canDeleteNeutronLoadBalancerPoolMember(NeutronLoadBalancerPoolMember neutronLBPoolMember) {
 100         LoadBalancerConfiguration lbConfig = extractLBConfiguration(neutronLBPoolMember);
 101         if (lbConfig == null)
 102             return HttpURLConnection.HTTP_BAD_REQUEST;
 103         else if (!lbConfig.isValid())
 104             return HttpURLConnection.HTTP_NOT_ACCEPTABLE;
 105         else
 106             return HttpURLConnection.HTTP_OK;
 107     }
 108
 109     @Override
 110     public void neutronLoadBalancerPoolMemberDeleted(NeutronLoadBalancerPoolMember neutronLBPoolMember) {
 111         logger.debug("Neutron LB Pool Member Deletion : {}", neutronLBPoolMember.toString());
 112
 113         /* As of now, deleting a member involves recomputing member indices.
 114          * This is best done through a complete update of the load balancer instance.
 115          */
 116         for (NeutronLoadBalancer neutronLB: neutronLBCache.getAllNeutronLoadBalancers()) {
 117             String loadBalancerSubnetID = neutronLB.getLoadBalancerVipSubnetID();
 118             if (neutronLBPoolMember.getPoolMemberSubnetID().equals(loadBalancerSubnetID)) {
 119                 enqueueEvent(new NorthboundEvent(neutronLB, Action.UPDATE));
 120                 break;
 121             }
 122         }
 123     }
 124
 125     /**
 126      * Process the event.
 127      *
 128      * @param abstractEvent the {@link org.opendaylight.ovsdb.openstack.netvirt.AbstractEvent} event to be handled.
 129      * @see org.opendaylight.ovsdb.openstack.netvirt.api.EventDispatcher
 130      */
 131     @Override
 132     public void processEvent(AbstractEvent abstractEvent) {
 133         if (!(abstractEvent instanceof NorthboundEvent)) {
 134             logger.error("Unable to process abstract event " + abstractEvent);
 135             return;
 136         }
 137         NorthboundEvent ev = (NorthboundEvent) abstractEvent;
 138         switch (ev.getAction()) {
 139             case ADD:
 140                 doNeutronLoadBalancerPoolMemberCreate(ev.getLoadBalancerPoolMember());
 141             case DELETE:
 142                 logger.warn("Load balancer pool member delete event should not have been triggered");
 143             case UPDATE:
 144                 /**
 145                  * Typical upgrade involves changing weights. Since weights are not
 146                  * supported yet, updates are not supported either.
 147                  */
 148                 logger.warn("Load balancer pool member update is not supported");
 149                 break;
 150             default:
 151                 logger.warn("Unable to process event action " + ev.getAction());
 152                 break;
 153         }
 154     }
 155
 156     /**
 157      * Useful utility for extracting the loadbalancer instance
 158      * configuration from the neutron LB cache based on member info
 159      */
 160     public LoadBalancerConfiguration extractLBConfiguration(NeutronLoadBalancerPoolMember neutronLBPoolMember) {
 161         String memberIP = neutronLBPoolMember.getPoolMemberAddress();
 162         String memberMAC = NeutronCacheUtils.getMacAddress(neutronPortsCache, memberIP);
 163         if (memberMAC == null)
 164             return null;
 165
 166         String memberID = neutronLBPoolMember.getPoolMemberID();
 167         Integer memberPort = neutronLBPoolMember.getPoolMemberProtoPort();
 168         String memberProtocol = null;
 169         boolean found = false;
 170
 171         for (NeutronLoadBalancerPool neutronLBPool: neutronLBPoolCache.getAllNeutronLoadBalancerPools()) {
 172             List<? extends NeutronLoadBalancerPoolMember> members =
 173                     (List<? extends NeutronLoadBalancerPoolMember>)neutronLBPool.getLoadBalancerPoolMembers();
 174             for (NeutronLoadBalancerPoolMember member: members) {
 175                 //TODO: Allow member to be present in more than 1 pool
 176                 if (member.getPoolMemberID().equals(neutronLBPoolMember.getPoolMemberID())) {
 177                     found = true;
 178                     memberProtocol = neutronLBPool.getLoadBalancerPoolProtocol();
 179                     if (!(memberProtocol.equalsIgnoreCase(LoadBalancerConfiguration.PROTOCOL_HTTP) ||
 180                             memberProtocol.equalsIgnoreCase(LoadBalancerConfiguration.PROTOCOL_HTTPS)))
 181                         memberProtocol = null;
 182                     break;
 183                 }
 184             }
 185             if (found)
 186                 break;
 187         }
 188         if (memberProtocol == null)
 189             return null;
 190
 191         String loadBalancerSubnetID, loadBalancerVip, loadBalancerName;
 192         for (NeutronLoadBalancer neutronLB: neutronLBCache.getAllNeutronLoadBalancers()) {
 193             loadBalancerSubnetID = neutronLB.getLoadBalancerVipSubnetID();
 194             if (neutronLBPoolMember.getPoolMemberSubnetID().equals(loadBalancerSubnetID)) {
 195                 loadBalancerName = neutronLB.getLoadBalancerName();
 196                 loadBalancerVip = neutronLB.getLoadBalancerVipAddress();
 197                 LoadBalancerConfiguration lbConfig = new LoadBalancerConfiguration(loadBalancerName, loadBalancerVip);
 198                 lbConfig.addMember(memberID, memberIP, memberMAC, memberProtocol, memberPort);
 199                 return lbConfig;
 200             }
 201         }
 202         return null;
 203     }
 204 }