public async Task GetSentinelMasterConnectionWriteReadFailover()
{
Log("Conn:");
foreach (var server in Conn.GetServerSnapshot().ToArray())
{
Log(" Endpoint: " + server.EndPoint);
}
Log("Conn Slaves:");
foreach (var slaves in SentinelServerA.SentinelSlaves(ServiceName))
{
foreach (var pair in slaves)
{
Log(" {0}: {1}", pair.Key, pair.Value);
}
}
var conn = Conn.GetSentinelMasterConnection(ServiceOptions);
var s = conn.currentSentinelMasterEndPoint.ToString();
Log("Sentinel Master Endpoint: " + s);
foreach (var server in conn.GetServerSnapshot().ToArray())
{
Log(" Server: " + server.EndPoint);
Log(" Master Endpoint: " + server.MasterEndPoint);
Log(" IsSlave: " + server.IsSlave);
Log(" SlaveReadOnly: " + server.SlaveReadOnly);
var info = conn.GetServer(server.EndPoint).Info("Replication");
foreach (var section in info)
{
Log(" Section: " + section.Key);
foreach (var pair in section)
{
Log(" " + pair.Key + ": " + pair.Value);
}
}
}
IDatabase db = conn.GetDatabase();
var expected = DateTime.Now.Ticks.ToString();
Log("Tick Key: " + expected);
var key = Me();
db.KeyDelete(key, CommandFlags.FireAndForget);
db.StringSet(key, expected);
await UntilCondition(TimeSpan.FromSeconds(10),
() => SentinelServerA.SentinelMaster(ServiceName).ToDictionary()["num-slaves"] != "0"
);
Log("Conditions met");
try
{
Log("Failover attempted initiated");
SentinelServerA.SentinelFailover(ServiceName);
Log(" Success!");
}
catch (RedisServerException ex) when(ex.Message.Contains("NOGOODSLAVE"))
{
// Retry once
Log(" Retry initiated");
await Task.Delay(1000).ForAwait();
SentinelServerA.SentinelFailover(ServiceName);
Log(" Retry complete");
}
Log("Delaying for failover conditions...");
await Task.Delay(2000).ForAwait();
Log("Conditons check...");
// Spin until complete (with a timeout) - since this can vary
await UntilCondition(TimeSpan.FromSeconds(20), () =>
{
var checkConn = Conn.GetSentinelMasterConnection(ServiceOptions);
return(s != checkConn.currentSentinelMasterEndPoint.ToString() &&
expected == checkConn.GetDatabase().StringGet(key));
});
Log(" Conditions met.");
var conn1 = Conn.GetSentinelMasterConnection(ServiceOptions);
var s1 = conn1.currentSentinelMasterEndPoint.ToString();
Log("New master endpoint: " + s1);
var actual = conn1.GetDatabase().StringGet(key);
Log("Fetched tick key: " + actual);
Assert.NotNull(s);
Assert.NotNull(s1);
Assert.NotEmpty(s);
Assert.NotEmpty(s1);
Assert.NotEqual(s, s1);
// TODO: Track this down on the test race
//Assert.Equal(expected, actual);
}