public virtual RedisClient CreateRedisClient(RedisEndpoint config, bool master)
{
var client = ClientFactory(config);
if (master && RedisConfig.VerifyMasterConnections)
{
var role = client.GetServerRole();
if (role != RedisServerRole.Master)
{
Interlocked.Increment(ref RedisState.TotalInvalidMasters);
log.Error("Redis Master Host '{0}' is {1}. Resetting allHosts...".Fmt(config.GetHostString(), role));
var newMasters = new List <RedisEndpoint>();
var newSlaves = new List <RedisEndpoint>();
RedisClient masterClient = null;
foreach (var hostConfig in allHosts)
{
try
{
var testClient = ClientFactory(hostConfig);
testClient.ConnectTimeout = RedisConfig.HostLookupTimeoutMs;
var testRole = testClient.GetServerRole();
switch (testRole)
{
case RedisServerRole.Master:
newMasters.Add(hostConfig);
if (masterClient == null)
{
masterClient = testClient;
}
break;
case RedisServerRole.Slave:
newSlaves.Add(hostConfig);
break;
}
}
catch { /* skip */ }
}
if (masterClient == null)
{
Interlocked.Increment(ref RedisState.TotalNoMastersFound);
var errorMsg = "No master found in: " + string.Join(", ", allHosts.Map(x => x.GetHostString()));
log.Error(errorMsg);
throw new Exception(errorMsg);
}
ResetMasters(newMasters);
ResetSlaves(newSlaves);
return(masterClient);
}
}
return(client);
}
protected bool Equals(RedisEndpoint other)
{
return(string.Equals(Host, other.Host) &&
Port == other.Port &&
Ssl.Equals(other.Ssl) &&
ConnectTimeout == other.ConnectTimeout &&
SendTimeout == other.SendTimeout &&
ReceiveTimeout == other.ReceiveTimeout &&
RetryTimeout == other.RetryTimeout &&
IdleTimeOutSecs == other.IdleTimeOutSecs &&
Db == other.Db &&
string.Equals(Client, other.Client) &&
string.Equals(Password, other.Password) &&
string.Equals(NamespacePrefix, other.NamespacePrefix));
}
public RedisSentinelWorker(RedisSentinel sentinel, RedisEndpoint sentinelEndpoint)
{
this.sentinel = sentinel;
this.sentinelClient = new RedisClient(sentinelEndpoint)
{
Db = 0, //Sentinel Servers doesn't support DB, reset to 0
ConnectTimeout = sentinel.SentinelWorkerConnectTimeoutMs,
ReceiveTimeout = sentinel.SentinelWorkerReceiveTimeoutMs,
SendTimeout = sentinel.SentinelWorkerSendTimeoutMs,
};
if (Log.IsDebugEnabled)
{
Log.Debug("Set up Redis Sentinel on {0}".Fmt(sentinelEndpoint));
}
}
public RedisClient(RedisEndpoint config)
: base(config)
{
Init();
}
public static RedisClient CreateRedisClient(this IRedisResolver resolver, RedisEndpoint config, bool master)
{
return(((IRedisResolverExtended)resolver).CreateRedisClient(config, master));
}
public static RedisEndpoint ToRedisEndpoint(this string connectionString, int?defaultPort = null)
{
if (connectionString == null)
{
throw new ArgumentNullException("connectionString");
}
if (connectionString.StartsWith("redis://"))
{
connectionString = connectionString.Substring("redis://".Length);
}
var domainParts = connectionString.SplitOnLast('@');
var qsParts = domainParts.Last().SplitOnFirst('?');
var hostParts = qsParts[0].SplitOnLast(':');
var useDefaultPort = true;
var port = defaultPort.GetValueOrDefault(RedisConfig.DefaultPort);
if (hostParts.Length > 1)
{
port = int.Parse(hostParts[1]);
useDefaultPort = false;
}
var endpoint = new RedisEndpoint(hostParts[0], port);
if (domainParts.Length > 1)
{
var authParts = domainParts[0].SplitOnFirst(':');
if (authParts.Length > 1)
{
endpoint.Client = authParts[0];
}
endpoint.Password = authParts.Last();
}
if (qsParts.Length > 1)
{
var qsParams = qsParts[1].Split('&');
foreach (var param in qsParams)
{
var entry = param.Split('=');
var value = entry.Length > 1 ? entry[1].UrlDecode() : null;
if (value == null)
{
continue;
}
var name = entry[0].ToLower();
switch (name)
{
case "db":
endpoint.Db = int.Parse(value);
break;
case "ssl":
endpoint.Ssl = bool.Parse(value);
if (useDefaultPort)
{
endpoint.Port = RedisConfig.DefaultPortSsl;
}
break;
case "client":
endpoint.Client = value;
break;
case "password":
endpoint.Password = value;
break;
case "namespaceprefix":
endpoint.NamespacePrefix = value;
break;
case "connecttimeout":
endpoint.ConnectTimeout = int.Parse(value);
break;
case "sendtimeout":
endpoint.SendTimeout = int.Parse(value);
break;
case "receivetimeout":
endpoint.ReceiveTimeout = int.Parse(value);
break;
case "retrytimeout":
endpoint.RetryTimeout = int.Parse(value);
break;
case "idletimeout":
case "idletimeoutsecs":
endpoint.IdleTimeOutSecs = int.Parse(value);
break;
}
}
}
return(endpoint);
}
public RedisClient CreateRedisClient(RedisEndpoint config, bool master)
{
return(ClientFactory(config));
}
public static string GetHostString(this RedisEndpoint config)
{
return("{0}:{1}".Fmt(config.Host, config.Port));
}
public virtual RedisClient CreateRedisClient(RedisEndpoint config, bool master)
{
var client = ClientFactory(config);
if (master)
{
var role = RedisServerRole.Unknown;
try
{
role = client.GetServerRole();
if (role == RedisServerRole.Master)
{
lastValidMasterFromSentinelAt = DateTime.UtcNow;
return(client);
}
}
catch (Exception ex)
{
Interlocked.Increment(ref RedisState.TotalInvalidMasters);
if (client.GetHostString() == lastInvalidMasterHost)
{
lock (oLock)
{
if (DateTime.UtcNow - lastValidMasterFromSentinelAt > sentinel.WaitBeforeForcingMasterFailover)
{
lastInvalidMasterHost = null;
lastValidMasterFromSentinelAt = DateTime.UtcNow;
log.Error("Valid master was not found at '{0}' within '{1}'. Sending SENTINEL failover...".Fmt(
client.GetHostString(), sentinel.WaitBeforeForcingMasterFailover), ex);
Interlocked.Increment(ref RedisState.TotalForcedMasterFailovers);
sentinel.ForceMasterFailover();
Thread.Sleep(sentinel.WaitBetweenFailedHosts);
role = client.GetServerRole();
}
}
}
else
{
lastInvalidMasterHost = client.GetHostString();
}
}
if (role != RedisServerRole.Master && RedisConfig.VerifyMasterConnections)
{
try
{
var stopwatch = Stopwatch.StartNew();
while (true)
{
try
{
var masterConfig = sentinel.GetMaster();
var masterClient = ClientFactory(masterConfig);
masterClient.ConnectTimeout = sentinel.SentinelWorkerConnectTimeoutMs;
var masterRole = masterClient.GetServerRole();
if (masterRole == RedisServerRole.Master)
{
lastValidMasterFromSentinelAt = DateTime.UtcNow;
return(masterClient);
}
else
{
Interlocked.Increment(ref RedisState.TotalInvalidMasters);
}
}
catch { /* Ignore errors until MaxWait */ }
if (stopwatch.Elapsed > sentinel.MaxWaitBetweenFailedHosts)
{
throw new TimeoutException("Max Wait Between Sentinel Lookups Elapsed: {0}"
.Fmt(sentinel.MaxWaitBetweenFailedHosts.ToString()));
}
Thread.Sleep(sentinel.WaitBetweenFailedHosts);
}
}
catch (Exception ex)
{
log.Error("Redis Master Host '{0}' is {1}. Resetting allHosts...".Fmt(config.GetHostString(), role), ex);
var newMasters = new List <RedisEndpoint>();
var newSlaves = new List <RedisEndpoint>();
RedisClient masterClient = null;
foreach (var hostConfig in allHosts)
{
try
{
var testClient = ClientFactory(hostConfig);
testClient.ConnectTimeout = RedisConfig.HostLookupTimeoutMs;
var testRole = testClient.GetServerRole();
switch (testRole)
{
case RedisServerRole.Master:
newMasters.Add(hostConfig);
if (masterClient == null)
{
masterClient = testClient;
}
break;
case RedisServerRole.Slave:
newSlaves.Add(hostConfig);
break;
}
}
catch { /* skip past invalid master connections */ }
}
if (masterClient == null)
{
Interlocked.Increment(ref RedisState.TotalNoMastersFound);
var errorMsg = "No master found in: " + string.Join(", ", allHosts.Map(x => x.GetHostString()));
log.Error(errorMsg);
throw new Exception(errorMsg);
}
ResetMasters(newMasters);
ResetSlaves(newSlaves);
return(masterClient);
}
}
}
return(client);
}
