Jonathan Hart | d82f20d | 2013-02-21 18:04:24 -0800 | [diff] [blame] | 1 | package net.onrc.onos.registry.controller; |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 2 | |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 3 | import java.io.IOException; |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 4 | import java.util.ArrayList; |
| 5 | import java.util.Collection; |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 6 | import java.util.Collections; |
Jonathan Hart | 599c6b3 | 2013-03-24 22:42:02 -0700 | [diff] [blame] | 7 | import java.util.Comparator; |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 8 | import java.util.HashMap; |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 9 | import java.util.List; |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 10 | import java.util.Map; |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 11 | import java.util.concurrent.ConcurrentHashMap; |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 12 | |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 13 | import net.floodlightcontroller.core.module.FloodlightModuleContext; |
| 14 | import net.floodlightcontroller.core.module.FloodlightModuleException; |
| 15 | import net.floodlightcontroller.core.module.IFloodlightModule; |
| 16 | import net.floodlightcontroller.core.module.IFloodlightService; |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 17 | import net.floodlightcontroller.restserver.IRestApiService; |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 18 | |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 19 | import org.openflow.util.HexString; |
| 20 | import org.slf4j.Logger; |
| 21 | import org.slf4j.LoggerFactory; |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 22 | |
Jonathan Hart | d10008d | 2013-02-23 17:04:08 -0800 | [diff] [blame] | 23 | import com.google.common.base.Charsets; |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 24 | import com.netflix.curator.RetryPolicy; |
| 25 | import com.netflix.curator.framework.CuratorFramework; |
| 26 | import com.netflix.curator.framework.CuratorFrameworkFactory; |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 27 | import com.netflix.curator.framework.recipes.cache.ChildData; |
| 28 | import com.netflix.curator.framework.recipes.cache.PathChildrenCache; |
| 29 | import com.netflix.curator.framework.recipes.cache.PathChildrenCache.StartMode; |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 30 | import com.netflix.curator.framework.recipes.cache.PathChildrenCacheEvent; |
| 31 | import com.netflix.curator.framework.recipes.cache.PathChildrenCacheListener; |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 32 | import com.netflix.curator.framework.recipes.leader.LeaderLatch; |
Jonathan Hart | 0de0949 | 2013-03-13 14:37:21 -0700 | [diff] [blame] | 33 | import com.netflix.curator.framework.recipes.leader.LeaderLatchEvent; |
| 34 | import com.netflix.curator.framework.recipes.leader.LeaderLatchListener; |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 35 | import com.netflix.curator.retry.ExponentialBackoffRetry; |
Jonathan Hart | 71c0ffc | 2013-03-24 15:58:42 -0700 | [diff] [blame] | 36 | import com.netflix.curator.x.discovery.ServiceCache; |
| 37 | import com.netflix.curator.x.discovery.ServiceDiscovery; |
| 38 | import com.netflix.curator.x.discovery.ServiceDiscoveryBuilder; |
| 39 | import com.netflix.curator.x.discovery.ServiceInstance; |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 40 | |
Jonathan Hart | 7bf6217 | 2013-02-28 13:17:18 -0800 | [diff] [blame] | 41 | /** |
| 42 | * A registry service that uses Zookeeper. All data is stored in Zookeeper, |
| 43 | * so this can be used as a global registry in a multi-node ONOS cluster. |
| 44 | * @author jono |
| 45 | * |
| 46 | */ |
Jonathan Hart | bd76697 | 2013-02-22 15:13:03 -0800 | [diff] [blame] | 47 | public class ZookeeperRegistry implements IFloodlightModule, IControllerRegistryService { |
Jonathan Hart | c6eee9e | 2013-02-18 14:58:27 -0800 | [diff] [blame] | 48 | |
Jonathan Hart | bd76697 | 2013-02-22 15:13:03 -0800 | [diff] [blame] | 49 | protected static Logger log = LoggerFactory.getLogger(ZookeeperRegistry.class); |
| 50 | protected String controllerId = null; |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 51 | |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 52 | protected IRestApiService restApi; |
| 53 | |
Jonathan Hart | 7bf6217 | 2013-02-28 13:17:18 -0800 | [diff] [blame] | 54 | //This is the default, it's overwritten by the connectionString configuration parameter |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 55 | protected String connectionString = "localhost:2181"; |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 56 | |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 57 | private final String namespace = "onos"; |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 58 | private final String switchLatchesPath = "/switches"; |
Jonathan Hart | 71c0ffc | 2013-03-24 15:58:42 -0700 | [diff] [blame] | 59 | |
| 60 | private final String SERVICES_PATH = "/"; //i.e. the root of our namespace |
| 61 | private final String CONTROLLER_SERVICE_NAME = "controllers"; |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 62 | |
| 63 | protected CuratorFramework client; |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 64 | |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 65 | protected PathChildrenCache switchCache; |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 66 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 67 | protected ConcurrentHashMap<String, SwitchLeadershipData> switches; |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 68 | protected Map<String, PathChildrenCache> switchPathCaches; |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 69 | |
Jonathan Hart | 97801ac | 2013-02-26 14:29:16 -0800 | [diff] [blame] | 70 | //Zookeeper performance-related configuration |
Jonathan Hart | 0b3eee4 | 2013-03-16 18:20:04 -0700 | [diff] [blame] | 71 | protected static final int sessionTimeout = 5000; |
| 72 | protected static final int connectionTimeout = 7000; |
Jonathan Hart | 57080fb | 2013-02-21 10:55:46 -0800 | [diff] [blame] | 73 | |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 74 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 75 | protected class SwitchLeaderListener implements LeaderLatchListener{ |
Jonathan Hart | 0de0949 | 2013-03-13 14:37:21 -0700 | [diff] [blame] | 76 | String dpid; |
| 77 | LeaderLatch latch; |
| 78 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 79 | public SwitchLeaderListener(String dpid, LeaderLatch latch){ |
Jonathan Hart | 0de0949 | 2013-03-13 14:37:21 -0700 | [diff] [blame] | 80 | this.dpid = dpid; |
| 81 | this.latch = latch; |
| 82 | } |
| 83 | |
| 84 | @Override |
| 85 | public void leaderLatchEvent(CuratorFramework arg0, |
| 86 | LeaderLatchEvent arg1) { |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 87 | log.debug("Leadership changed for {}, now {}", |
Jonathan Hart | 0de0949 | 2013-03-13 14:37:21 -0700 | [diff] [blame] | 88 | dpid, latch.hasLeadership()); |
| 89 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 90 | //Check that the leadership request is still active - the client |
| 91 | //may have since released the request or even begun another request |
| 92 | //(this is why we use == to check the object instance is the same) |
| 93 | SwitchLeadershipData swData = switches.get(dpid); |
| 94 | if (swData != null && swData.getLatch() == latch){ |
| 95 | swData.getCallback().controlChanged( |
| 96 | HexString.toLong(dpid), latch.hasLeadership()); |
| 97 | } |
| 98 | else { |
Jonathan Hart | 4baf3be | 2013-03-21 18:26:13 -0700 | [diff] [blame] | 99 | log.debug("Latch for {} has changed: old latch {} - new latch {}", |
| 100 | new Object[]{dpid, latch, swData.getLatch()}); |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 101 | } |
Jonathan Hart | 0de0949 | 2013-03-13 14:37:21 -0700 | [diff] [blame] | 102 | } |
| 103 | } |
| 104 | |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 105 | |
Jonathan Hart | 7bf6217 | 2013-02-28 13:17:18 -0800 | [diff] [blame] | 106 | /** |
| 107 | * Listens for changes to the switch znodes in Zookeeper. This maintains |
| 108 | * the second level of PathChildrenCaches that hold the controllers |
| 109 | * contending for each switch - there's one for each switch. |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 110 | */ |
| 111 | PathChildrenCacheListener switchPathCacheListener = new PathChildrenCacheListener() { |
| 112 | @Override |
| 113 | public void childEvent(CuratorFramework client, |
| 114 | PathChildrenCacheEvent event) throws Exception { |
Jonathan Hart | cbb4b95 | 2013-03-18 16:15:18 -0700 | [diff] [blame] | 115 | //log.debug("Root switch path cache got {} event", event.getType()); |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 116 | |
| 117 | String strSwitch = null; |
| 118 | if (event.getData() != null){ |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 119 | String[] splitted = event.getData().getPath().split("/"); |
| 120 | strSwitch = splitted[splitted.length - 1]; |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | switch (event.getType()){ |
| 124 | case CHILD_ADDED: |
| 125 | case CHILD_UPDATED: |
| 126 | //Check we have a PathChildrenCache for this child, add one if not |
Jonathan Hart | 4baf3be | 2013-03-21 18:26:13 -0700 | [diff] [blame] | 127 | synchronized (switchPathCaches){ |
| 128 | if (switchPathCaches.get(strSwitch) == null){ |
| 129 | PathChildrenCache pc = new PathChildrenCache(client, |
| 130 | event.getData().getPath(), true); |
| 131 | pc.start(StartMode.NORMAL); |
| 132 | switchPathCaches.put(strSwitch, pc); |
| 133 | } |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 134 | } |
| 135 | break; |
| 136 | case CHILD_REMOVED: |
| 137 | //Remove our PathChildrenCache for this child |
Jonathan Hart | 4baf3be | 2013-03-21 18:26:13 -0700 | [diff] [blame] | 138 | PathChildrenCache pc = null; |
| 139 | synchronized(switchPathCaches){ |
| 140 | pc = switchPathCaches.remove(strSwitch); |
| 141 | } |
| 142 | if (pc != null){ |
| 143 | pc.close(); |
| 144 | } |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 145 | break; |
| 146 | default: |
Jonathan Hart | 4baf3be | 2013-03-21 18:26:13 -0700 | [diff] [blame] | 147 | //All other events are connection status events. We don't need to |
| 148 | //do anything as the path cache handles these on its own. |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 149 | break; |
| 150 | } |
| 151 | |
| 152 | } |
| 153 | }; |
Jonathan Hart | 71c0ffc | 2013-03-24 15:58:42 -0700 | [diff] [blame] | 154 | protected ServiceDiscovery<ControllerService> serviceDiscovery; |
| 155 | protected ServiceCache<ControllerService> serviceCache; |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 156 | |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 157 | |
| 158 | @Override |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 159 | public void requestControl(long dpid, ControlChangeCallback cb) throws RegistryException { |
Jonathan Hart | 7bf6217 | 2013-02-28 13:17:18 -0800 | [diff] [blame] | 160 | log.info("Requesting control for {}", HexString.toHexString(dpid)); |
Jonathan Hart | c6eee9e | 2013-02-18 14:58:27 -0800 | [diff] [blame] | 161 | |
Jonathan Hart | bd76697 | 2013-02-22 15:13:03 -0800 | [diff] [blame] | 162 | if (controllerId == null){ |
| 163 | throw new RuntimeException("Must register a controller before calling requestControl"); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 164 | } |
| 165 | |
| 166 | String dpidStr = HexString.toHexString(dpid); |
| 167 | String latchPath = switchLatchesPath + "/" + dpidStr; |
| 168 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 169 | if (switches.get(dpidStr) != null){ |
Jonathan Hart | 3c0eccd | 2013-03-12 22:32:50 -0700 | [diff] [blame] | 170 | log.debug("Already contesting {}, returning", HexString.toHexString(dpid)); |
Pankaj Berde | da7187b | 2013-03-18 15:24:59 -0700 | [diff] [blame] | 171 | throw new RegistryException("Already contesting control for " + dpidStr); |
Jonathan Hart | c6eee9e | 2013-02-18 14:58:27 -0800 | [diff] [blame] | 172 | } |
| 173 | |
Jonathan Hart | bd76697 | 2013-02-22 15:13:03 -0800 | [diff] [blame] | 174 | LeaderLatch latch = new LeaderLatch(client, latchPath, controllerId); |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 175 | latch.addListener(new SwitchLeaderListener(dpidStr, latch)); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 176 | |
Jonathan Hart | 44e56fc | 2013-03-14 16:53:59 -0700 | [diff] [blame] | 177 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 178 | SwitchLeadershipData swData = new SwitchLeadershipData(latch, cb); |
| 179 | SwitchLeadershipData oldData = switches.putIfAbsent(dpidStr, swData); |
| 180 | |
| 181 | if (oldData != null){ |
| 182 | //There was already data for that key in the map |
| 183 | //i.e. someone else got here first so we can't succeed |
| 184 | log.debug("Already requested control for {}", dpidStr); |
| 185 | throw new RegistryException("Already requested control for " + dpidStr); |
| 186 | } |
| 187 | |
| 188 | //Now that we know we were able to add our latch to the collection, |
Jonathan Hart | 44e56fc | 2013-03-14 16:53:59 -0700 | [diff] [blame] | 189 | //we can start the leader election in Zookeeper. However I don't know |
| 190 | //how to handle if the start fails - the latch is already in our |
| 191 | //switches list. |
| 192 | //TODO seems like there's a Curator bug when latch.start is called when |
| 193 | //there's no Zookeeper connection which causes two znodes to be put in |
| 194 | //Zookeeper at the latch path when we reconnect to Zookeeper. |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 195 | try { |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 196 | latch.start(); |
| 197 | } catch (Exception e) { |
Jonathan Hart | c6eee9e | 2013-02-18 14:58:27 -0800 | [diff] [blame] | 198 | log.warn("Error starting leader latch: {}", e.getMessage()); |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 199 | throw new RegistryException("Error starting leader latch for " + dpidStr, e); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | } |
| 203 | |
| 204 | @Override |
Jonathan Hart | d82f20d | 2013-02-21 18:04:24 -0800 | [diff] [blame] | 205 | public void releaseControl(long dpid) { |
Jonathan Hart | 7bf6217 | 2013-02-28 13:17:18 -0800 | [diff] [blame] | 206 | log.info("Releasing control for {}", HexString.toHexString(dpid)); |
Jonathan Hart | 57080fb | 2013-02-21 10:55:46 -0800 | [diff] [blame] | 207 | |
Jonathan Hart | c6eee9e | 2013-02-18 14:58:27 -0800 | [diff] [blame] | 208 | String dpidStr = HexString.toHexString(dpid); |
| 209 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 210 | SwitchLeadershipData swData = switches.remove(dpidStr); |
| 211 | |
| 212 | if (swData == null) { |
Jonathan Hart | 7bf6217 | 2013-02-28 13:17:18 -0800 | [diff] [blame] | 213 | log.debug("Trying to release control of a switch we are not contesting"); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 214 | return; |
| 215 | } |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 216 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 217 | LeaderLatch latch = swData.getLatch(); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 218 | |
Jonathan Hart | 4baf3be | 2013-03-21 18:26:13 -0700 | [diff] [blame] | 219 | latch.removeAllListeners(); |
| 220 | |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 221 | try { |
| 222 | latch.close(); |
| 223 | } catch (IOException e) { |
Jonathan Hart | 7bf6217 | 2013-02-28 13:17:18 -0800 | [diff] [blame] | 224 | //I think it's OK not to do anything here. Either the node got |
| 225 | //deleted correctly, or the connection went down and the node got deleted. |
Umesh Krishnaswamy | 0ef75ee | 2013-03-25 17:50:27 -0700 | [diff] [blame] | 226 | log.debug("releaseControl: caught IOException {}", dpidStr); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 227 | } |
| 228 | } |
| 229 | |
| 230 | @Override |
Jonathan Hart | d82f20d | 2013-02-21 18:04:24 -0800 | [diff] [blame] | 231 | public boolean hasControl(long dpid) { |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 232 | String dpidStr = HexString.toHexString(dpid); |
Jonathan Hart | 57080fb | 2013-02-21 10:55:46 -0800 | [diff] [blame] | 233 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 234 | SwitchLeadershipData swData = switches.get(dpidStr); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 235 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 236 | if (swData == null) { |
| 237 | log.warn("No leader latch for dpid {}", dpidStr); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 238 | return false; |
| 239 | } |
| 240 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 241 | return swData.getLatch().hasLeadership(); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | @Override |
Jonathan Hart | 7bf6217 | 2013-02-28 13:17:18 -0800 | [diff] [blame] | 245 | public String getControllerId() { |
Jonathan Hart | bd76697 | 2013-02-22 15:13:03 -0800 | [diff] [blame] | 246 | return controllerId; |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 247 | } |
| 248 | |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 249 | @Override |
Jonathan Hart | 57080fb | 2013-02-21 10:55:46 -0800 | [diff] [blame] | 250 | public Collection<String> getAllControllers() throws RegistryException { |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 251 | log.debug("Getting all controllers"); |
Jonathan Hart | 1be4626 | 2013-02-20 16:43:51 -0800 | [diff] [blame] | 252 | |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 253 | List<String> controllers = new ArrayList<String>(); |
Jonathan Hart | 71c0ffc | 2013-03-24 15:58:42 -0700 | [diff] [blame] | 254 | for (ServiceInstance<ControllerService> instance : serviceCache.getInstances()){ |
| 255 | String id = instance.getPayload().getControllerId(); |
| 256 | if (!controllers.contains(id)){ |
| 257 | controllers.add(id); |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 258 | } |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 259 | } |
Jonathan Hart | 71c0ffc | 2013-03-24 15:58:42 -0700 | [diff] [blame] | 260 | |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 261 | return controllers; |
| 262 | } |
| 263 | |
| 264 | @Override |
Jonathan Hart | 57080fb | 2013-02-21 10:55:46 -0800 | [diff] [blame] | 265 | public void registerController(String id) throws RegistryException { |
Jonathan Hart | d10008d | 2013-02-23 17:04:08 -0800 | [diff] [blame] | 266 | if (controllerId != null) { |
| 267 | throw new RegistryException( |
| 268 | "Controller already registered with id " + controllerId); |
| 269 | } |
Jonathan Hart | bd76697 | 2013-02-22 15:13:03 -0800 | [diff] [blame] | 270 | |
| 271 | controllerId = id; |
Jonathan Hart | 57080fb | 2013-02-21 10:55:46 -0800 | [diff] [blame] | 272 | |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 273 | try { |
Jonathan Hart | 71c0ffc | 2013-03-24 15:58:42 -0700 | [diff] [blame] | 274 | ServiceInstance<ControllerService> thisInstance = ServiceInstance.<ControllerService>builder() |
| 275 | .name(CONTROLLER_SERVICE_NAME) |
| 276 | .payload(new ControllerService(controllerId)) |
| 277 | //.port((int)(65535 * Math.random())) // in a real application, you'd use a common port |
| 278 | //.uriSpec(uriSpec) |
| 279 | .build(); |
Jonathan Hart | 0b3eee4 | 2013-03-16 18:20:04 -0700 | [diff] [blame] | 280 | |
Jonathan Hart | 71c0ffc | 2013-03-24 15:58:42 -0700 | [diff] [blame] | 281 | serviceDiscovery.registerService(thisInstance); |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 282 | } catch (Exception e) { |
Jonathan Hart | 71c0ffc | 2013-03-24 15:58:42 -0700 | [diff] [blame] | 283 | // TODO Auto-generated catch block |
| 284 | e.printStackTrace(); |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 285 | } |
Jonathan Hart | 71c0ffc | 2013-03-24 15:58:42 -0700 | [diff] [blame] | 286 | |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | @Override |
Jonathan Hart | 57080fb | 2013-02-21 10:55:46 -0800 | [diff] [blame] | 290 | public String getControllerForSwitch(long dpid) throws RegistryException { |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 291 | String dpidStr = HexString.toHexString(dpid); |
Pankaj Berde | 017960a | 2013-03-14 20:32:26 -0700 | [diff] [blame] | 292 | |
Jonathan Hart | 599c6b3 | 2013-03-24 22:42:02 -0700 | [diff] [blame] | 293 | PathChildrenCache switchCache = switchPathCaches.get(dpidStr); |
| 294 | |
| 295 | if (switchCache == null){ |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 296 | log.warn("Tried to get controller for non-existent switch"); |
| 297 | return null; |
| 298 | } |
| 299 | |
Jonathan Hart | f4e8084 | 2013-03-26 23:55:02 -0700 | [diff] [blame] | 300 | try { |
| 301 | //We've seen issues with these caches get stuck out of date, so we'll have to |
| 302 | //force them to refresh before each read. This slows down the method as it |
| 303 | //blocks on a Zookeeper query, however at the moment only the cleanup thread |
| 304 | //uses this and that isn't particularly time-sensitive. |
| 305 | switchCache.rebuild(); |
| 306 | } catch (Exception e) { |
| 307 | // TODO Auto-generated catch block |
| 308 | e.printStackTrace(); |
| 309 | } |
| 310 | |
Jonathan Hart | 599c6b3 | 2013-03-24 22:42:02 -0700 | [diff] [blame] | 311 | List<ChildData> sortedData = new ArrayList<ChildData>(switchCache.getCurrentData()); |
Jonathan Hart | 0b3eee4 | 2013-03-16 18:20:04 -0700 | [diff] [blame] | 312 | |
Jonathan Hart | 599c6b3 | 2013-03-24 22:42:02 -0700 | [diff] [blame] | 313 | Collections.sort( |
| 314 | sortedData, |
| 315 | new Comparator<ChildData>(){ |
| 316 | private String getSequenceNumber(String path){ |
| 317 | return path.substring(path.lastIndexOf('-') + 1); |
| 318 | } |
| 319 | @Override |
| 320 | public int compare(ChildData lhs, ChildData rhs) { |
| 321 | return getSequenceNumber(lhs.getPath()). |
| 322 | compareTo(getSequenceNumber(rhs.getPath())); |
| 323 | } |
| 324 | } |
| 325 | ); |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 326 | |
Jonathan Hart | 56b296e | 2013-03-25 13:30:10 -0700 | [diff] [blame] | 327 | if (sortedData.size() == 0){ |
| 328 | return null; |
| 329 | } |
| 330 | |
Jonathan Hart | 599c6b3 | 2013-03-24 22:42:02 -0700 | [diff] [blame] | 331 | return new String(sortedData.get(0).getData(), Charsets.UTF_8); |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | @Override |
| 335 | public Collection<Long> getSwitchesControlledByController(String controllerId) { |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 336 | //TODO remove this if not needed |
Jonathan Hart | bd76697 | 2013-02-22 15:13:03 -0800 | [diff] [blame] | 337 | throw new RuntimeException("Not yet implemented"); |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 338 | } |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 339 | |
Jonathan Hart | d82f20d | 2013-02-21 18:04:24 -0800 | [diff] [blame] | 340 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 341 | //TODO what should happen when there's no ZK connection? Currently we just return |
| 342 | //the cache but this may lead to false impressions - i.e. we don't actually know |
| 343 | //what's in ZK so we shouldn't say we do |
Jonathan Hart | d82f20d | 2013-02-21 18:04:24 -0800 | [diff] [blame] | 344 | @Override |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 345 | public Map<String, List<ControllerRegistryEntry>> getAllSwitches() { |
| 346 | Map<String, List<ControllerRegistryEntry>> data = |
| 347 | new HashMap<String, List<ControllerRegistryEntry>>(); |
| 348 | |
| 349 | for (Map.Entry<String, PathChildrenCache> entry : switchPathCaches.entrySet()){ |
| 350 | List<ControllerRegistryEntry> contendingControllers = |
| 351 | new ArrayList<ControllerRegistryEntry>(); |
| 352 | |
| 353 | if (entry.getValue().getCurrentData().size() < 1){ |
Jonathan Hart | cbb4b95 | 2013-03-18 16:15:18 -0700 | [diff] [blame] | 354 | //TODO prevent even having the PathChildrenCache in this case |
| 355 | //log.info("Switch entry with no leader elections: {}", entry.getKey()); |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 356 | continue; |
| 357 | } |
| 358 | |
| 359 | for (ChildData d : entry.getValue().getCurrentData()) { |
Jonathan Hart | 97801ac | 2013-02-26 14:29:16 -0800 | [diff] [blame] | 360 | |
Jonathan Hart | d10008d | 2013-02-23 17:04:08 -0800 | [diff] [blame] | 361 | String controllerId = new String(d.getData(), Charsets.UTF_8); |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 362 | |
| 363 | String[] splitted = d.getPath().split("-"); |
| 364 | int sequenceNumber = Integer.parseInt(splitted[splitted.length - 1]); |
| 365 | |
| 366 | contendingControllers.add(new ControllerRegistryEntry(controllerId, sequenceNumber)); |
| 367 | } |
| 368 | |
| 369 | Collections.sort(contendingControllers); |
| 370 | data.put(entry.getKey(), contendingControllers); |
| 371 | } |
| 372 | return data; |
Jonathan Hart | d82f20d | 2013-02-21 18:04:24 -0800 | [diff] [blame] | 373 | } |
| 374 | |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 375 | /* |
| 376 | * IFloodlightModule |
| 377 | */ |
| 378 | |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 379 | @Override |
| 380 | public Collection<Class<? extends IFloodlightService>> getModuleServices() { |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 381 | Collection<Class<? extends IFloodlightService>> l = |
| 382 | new ArrayList<Class<? extends IFloodlightService>>(); |
Jonathan Hart | d82f20d | 2013-02-21 18:04:24 -0800 | [diff] [blame] | 383 | l.add(IControllerRegistryService.class); |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 384 | return l; |
| 385 | } |
| 386 | |
| 387 | @Override |
| 388 | public Map<Class<? extends IFloodlightService>, IFloodlightService> getServiceImpls() { |
| 389 | Map<Class<? extends IFloodlightService>, IFloodlightService> m = |
| 390 | new HashMap<Class<? extends IFloodlightService>, IFloodlightService>(); |
Jonathan Hart | d82f20d | 2013-02-21 18:04:24 -0800 | [diff] [blame] | 391 | m.put(IControllerRegistryService.class, this); |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 392 | return m; |
| 393 | } |
| 394 | |
| 395 | @Override |
| 396 | public Collection<Class<? extends IFloodlightService>> getModuleDependencies() { |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 397 | Collection<Class<? extends IFloodlightService>> l = |
| 398 | new ArrayList<Class<? extends IFloodlightService>>(); |
| 399 | l.add(IRestApiService.class); |
| 400 | return l; |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 401 | } |
| 402 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 403 | //TODO currently blocks startup when it can't get a Zookeeper connection. |
| 404 | //Do we support starting up with no Zookeeper connection? |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 405 | @Override |
| 406 | public void init (FloodlightModuleContext context) throws FloodlightModuleException { |
Jonathan Hart | bd76697 | 2013-02-22 15:13:03 -0800 | [diff] [blame] | 407 | log.info("Initialising the Zookeeper Registry - Zookeeper connection required"); |
| 408 | |
Jonathan Hart | 97801ac | 2013-02-26 14:29:16 -0800 | [diff] [blame] | 409 | //Read the Zookeeper connection string from the config |
| 410 | Map<String, String> configParams = context.getConfigParams(this); |
| 411 | String connectionString = configParams.get("connectionString"); |
| 412 | if (connectionString != null){ |
| 413 | this.connectionString = connectionString; |
Jonathan Hart | 57080fb | 2013-02-21 10:55:46 -0800 | [diff] [blame] | 414 | } |
Jonathan Hart | 97801ac | 2013-02-26 14:29:16 -0800 | [diff] [blame] | 415 | log.info("Setting Zookeeper connection string to {}", this.connectionString); |
Jonathan Hart | 57080fb | 2013-02-21 10:55:46 -0800 | [diff] [blame] | 416 | |
Jonathan Hart | 97801ac | 2013-02-26 14:29:16 -0800 | [diff] [blame] | 417 | restApi = context.getServiceImpl(IRestApiService.class); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 418 | |
Jonathan Hart | 8918737 | 2013-03-14 16:41:09 -0700 | [diff] [blame] | 419 | switches = new ConcurrentHashMap<String, SwitchLeadershipData>(); |
Jonathan Hart | 4baf3be | 2013-03-21 18:26:13 -0700 | [diff] [blame] | 420 | //switchPathCaches = new HashMap<String, PathChildrenCache>(); |
| 421 | switchPathCaches = new ConcurrentHashMap<String, PathChildrenCache>(); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 422 | |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 423 | RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3); |
Jonathan Hart | 97801ac | 2013-02-26 14:29:16 -0800 | [diff] [blame] | 424 | client = CuratorFrameworkFactory.newClient(this.connectionString, |
Jonathan Hart | cc957a0 | 2013-02-26 10:39:04 -0800 | [diff] [blame] | 425 | sessionTimeout, connectionTimeout, retryPolicy); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 426 | |
| 427 | client.start(); |
Jonathan Hart | bd181b6 | 2013-02-17 16:05:38 -0800 | [diff] [blame] | 428 | client = client.usingNamespace(namespace); |
Jonathan Hart | 97801ac | 2013-02-26 14:29:16 -0800 | [diff] [blame] | 429 | |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 430 | |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 431 | switchCache = new PathChildrenCache(client, switchLatchesPath, true); |
| 432 | switchCache.getListenable().addListener(switchPathCacheListener); |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 433 | |
Jonathan Hart | 71c0ffc | 2013-03-24 15:58:42 -0700 | [diff] [blame] | 434 | //Build the service discovery object |
| 435 | serviceDiscovery = ServiceDiscoveryBuilder.builder(ControllerService.class) |
| 436 | .client(client).basePath(SERVICES_PATH).build(); |
| 437 | |
| 438 | //We read the list of services very frequently (GUI periodically queries them) |
| 439 | //so we'll cache them to cut down on Zookeeper queries. |
| 440 | serviceCache = serviceDiscovery.serviceCacheBuilder() |
| 441 | .name(CONTROLLER_SERVICE_NAME).build(); |
| 442 | |
| 443 | |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 444 | try { |
Jonathan Hart | 71c0ffc | 2013-03-24 15:58:42 -0700 | [diff] [blame] | 445 | serviceDiscovery.start(); |
| 446 | serviceCache.start(); |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 447 | |
| 448 | //Don't prime the cache, we want a notification for each child node in the path |
| 449 | switchCache.start(StartMode.NORMAL); |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 450 | } catch (Exception e) { |
Jonathan Hart | 7bf6217 | 2013-02-28 13:17:18 -0800 | [diff] [blame] | 451 | throw new FloodlightModuleException("Error initialising ZookeeperRegistry: " |
| 452 | + e.getMessage()); |
Jonathan Hart | edd6a44 | 2013-02-20 15:22:06 -0800 | [diff] [blame] | 453 | } |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | @Override |
| 457 | public void startUp (FloodlightModuleContext context) { |
Jonathan Hart | 3d7730a | 2013-02-22 11:51:17 -0800 | [diff] [blame] | 458 | restApi.addRestletRoutable(new RegistryWebRoutable()); |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 459 | } |
Umesh Krishnaswamy | b56bb29 | 2013-02-12 20:28:27 -0800 | [diff] [blame] | 460 | } |