@Test
public void testZoneAffinityEnabled() throws Exception {
ConfigurationManager.getConfigInstance()
.setProperty(
"DefaultNIWSServerListFilterTest1.ribbon.DeploymentContextBasedVipAddresses",
"l10nservicegeneral.cloud.netflix.net:7001");
ConfigurationManager.getConfigInstance()
.setProperty(
"DefaultNIWSServerListFilterTest1.ribbon.NFLoadBalancerClassName",
DynamicServerListLoadBalancer.class.getName());
ConfigurationManager.getConfigInstance()
.setProperty(
"DefaultNIWSServerListFilterTest1.ribbon.NIWSServerListClassName",
DiscoveryEnabledNIWSServerList.class.getName());
ConfigurationManager.getConfigInstance()
.setProperty("DefaultNIWSServerListFilterTest1.ribbon.EnableZoneAffinity", "true");
DynamicServerListLoadBalancer lb =
(DynamicServerListLoadBalancer)
ClientFactory.getNamedLoadBalancer("DefaultNIWSServerListFilterTest1");
assertTrue(lb.getRule() instanceof AvailabilityFilteringRule);
ZoneAffinityServerListFilter filter = (ZoneAffinityServerListFilter) lb.getFilter();
LoadBalancerStats loadBalancerStats = lb.getLoadBalancerStats();
List<DiscoveryEnabledServer> servers = new ArrayList<DiscoveryEnabledServer>();
servers.add(createServer(1, "a"));
servers.add(createServer(2, "a"));
servers.add(createServer(3, "a"));
servers.add(createServer(4, "a"));
servers.add(createServer(1, "b"));
servers.add(createServer(2, "b"));
servers.add(createServer(3, "b"));
servers.add(createServer(1, "c"));
servers.add(createServer(2, "c"));
servers.add(createServer(3, "c"));
servers.add(createServer(4, "c"));
servers.add(createServer(5, "c"));
List<DiscoveryEnabledServer> filtered = filter.getFilteredListOfServers(servers);
List<DiscoveryEnabledServer> expected = new ArrayList<DiscoveryEnabledServer>();
expected.add(createServer(1, "c"));
expected.add(createServer(2, "c"));
expected.add(createServer(3, "c"));
expected.add(createServer(4, "c"));
expected.add(createServer(5, "c"));
assertEquals(expected, filtered);
lb.setServersList(filtered);
for (int i = 1; i <= 4; i++) {
loadBalancerStats.incrementActiveRequestsCount(createServer(i, "c"));
}
filtered = filter.getFilteredListOfServers(servers);
assertEquals(servers, filtered);
}
/**
* Execute the request on single server after the final URI is calculated. This method takes care
* of retries and update server stats.
*/
protected T executeOnSingleServer(S request) throws ClientException {
boolean done = false;
int retries = 0;
boolean retryOkayOnOperation = okToRetryOnAllOperations;
if (request.isRetriable()) {
retryOkayOnOperation = true;
}
int numRetries = maxAutoRetries;
URI uri = request.getUri();
Server server = new Server(uri.getHost(), uri.getPort());
ServerStats serverStats = null;
ILoadBalancer lb = this.getLoadBalancer();
if (lb instanceof AbstractLoadBalancer) {
LoadBalancerStats lbStats = ((AbstractLoadBalancer) lb).getLoadBalancerStats();
serverStats = lbStats.getSingleServerStat(server);
}
IClientConfig overriddenClientConfig = request.getOverrideConfig();
if (overriddenClientConfig != null) {
try {
numRetries =
Integer.parseInt(
""
+ overriddenClientConfig.getProperty(
CommonClientConfigKey.MaxAutoRetries, maxAutoRetries));
} catch (Exception e) {
logger.warn("Invalid maxRetries requested for RestClient:" + this.clientName);
}
}
T response = null;
Exception lastException = null;
if (tracer == null) {
tracer =
Monitors.newTimer(this.getClass().getName() + "_ExecutionTimer", TimeUnit.MILLISECONDS);
}
do {
noteOpenConnection(serverStats, request);
Stopwatch w = tracer.start();
try {
response = execute(request);
done = true;
} catch (Exception e) {
if (serverStats != null) {
serverStats.addToFailureCount();
}
lastException = e;
if (isCircuitBreakerException(e) && serverStats != null) {
serverStats.incrementSuccessiveConnectionFailureCount();
}
boolean shouldRetry = retryOkayOnOperation && numRetries >= 0 && isRetriableException(e);
if (shouldRetry) {
retries = handleRetry(uri.toString(), retries, numRetries, e);
} else {
ClientException niwsClientException = generateNIWSException(uri.toString(), e);
throw niwsClientException;
}
} finally {
w.stop();
noteRequestCompletion(
serverStats, request, response, lastException, w.getDuration(TimeUnit.MILLISECONDS));
}
} while (!done);
return response;
}
@Test
public void testZoneAffinityOverride() throws Exception {
ConfigurationManager.getConfigInstance()
.setProperty(
"DefaultNIWSServerListFilterTest3.ribbon.DeploymentContextBasedVipAddresses",
"l10nservicegeneral.cloud.netflix.net:7001");
ConfigurationManager.getConfigInstance()
.setProperty(
"DefaultNIWSServerListFilterTest3.ribbon.NFLoadBalancerClassName",
DynamicServerListLoadBalancer.class.getName());
ConfigurationManager.getConfigInstance()
.setProperty("DefaultNIWSServerListFilterTest3.ribbon.EnableZoneAffinity", "true");
ConfigurationManager.getConfigInstance()
.setProperty(
"DefaultNIWSServerListFilterTest3.ribbon.NIWSServerListClassName",
DiscoveryEnabledNIWSServerList.class.getName());
ConfigurationManager.getConfigInstance()
.setProperty(
"DefaultNIWSServerListFilterTest3.ribbon.zoneAffinity.minAvailableServers", "3");
DynamicServerListLoadBalancer lb =
(DynamicServerListLoadBalancer)
ClientFactory.getNamedLoadBalancer("DefaultNIWSServerListFilterTest3");
ZoneAffinityServerListFilter filter = (ZoneAffinityServerListFilter) lb.getFilter();
LoadBalancerStats loadBalancerStats = lb.getLoadBalancerStats();
List<DiscoveryEnabledServer> servers = new ArrayList<DiscoveryEnabledServer>();
servers.add(createServer(1, "a"));
servers.add(createServer(2, "a"));
servers.add(createServer(3, "a"));
servers.add(createServer(4, "a"));
servers.add(createServer(1, "b"));
servers.add(createServer(2, "b"));
servers.add(createServer(3, "b"));
servers.add(createServer(1, "c"));
servers.add(createServer(2, "c"));
List<DiscoveryEnabledServer> filtered = filter.getFilteredListOfServers(servers);
List<DiscoveryEnabledServer> expected = new ArrayList<DiscoveryEnabledServer>();
/*
expected.add(createServer(1, "c"));
expected.add(createServer(2, "c"));
expected.add(createServer(3, "c"));
expected.add(createServer(4, "c"));
expected.add(createServer(5, "c")); */
// less than 3 servers in zone c, will not honor zone affinity
assertEquals(servers, filtered);
lb.setServersList(filtered);
servers.add(createServer(3, "c"));
filtered = filter.getFilteredListOfServers(servers);
expected.add(createServer(1, "c"));
expected.add(createServer(2, "c"));
expected.add(createServer(3, "c"));
filtered = filter.getFilteredListOfServers(servers);
// now we have enough servers in C
assertEquals(expected, filtered);
// make one server black out
for (int i = 1; i <= 3; i++) {
loadBalancerStats.incrementSuccessiveConnectionFailureCount(createServer(1, "c"));
}
filtered = filter.getFilteredListOfServers(servers);
assertEquals(servers, filtered);
// new server added in zone c, zone c should now have enough servers
servers.add(createServer(4, "c"));
filtered = filter.getFilteredListOfServers(servers);
expected.add(createServer(4, "c"));
assertEquals(expected, filtered);
}
