/// <summary>
/// Verify that a host alias references a valid node.
/// </summary>
public void ValidateNode(Cluster cluster, Host host)
{
IPAddress[] addresses = Connection.GetHostAddresses(host.name, cluster.connectionTimeout);
Exception exception = null;
foreach (IPAddress address in addresses)
{
try
{
ValidateAddress(cluster, address, host.tlsName, host.port, false);
SetAliases(address, host.tlsName, host.port);
return;
}
catch (Exception e)
{
// Log exception and continue to next alias.
if (Log.DebugEnabled())
{
Log.Debug("Address " + address + ' ' + host.port + " failed: " + Util.GetErrorMessage(e));
}
if (exception == null)
{
exception = e;
}
}
}
// Exception can't be null here because Connection.GetHostAddresses()
// will throw exception if aliases length is zero.
throw exception;
}
/// <summary>
/// Get default info from the specified database server node, using host name and port.
/// This method does not support user authentication.
/// </summary>
/// <param name="hostname">host name</param>
/// <param name="port">host port</param>
public static Dictionary <string, string> Request(string hostname, int port)
{
IPAddress[] addresses = Connection.GetHostAddresses(hostname, DEFAULT_TIMEOUT);
IPEndPoint ipe = new IPEndPoint(addresses[0], port);
return(Request(ipe));
}
/// <summary>
/// Return first valid node referenced by seed host aliases. In most cases, aliases
/// reference a single node. If round robin DNS configuration is used, the seed host
/// may have several addresses that reference different nodes in the cluster.
/// </summary>
public Node SeedNode(Cluster cluster, Host host, Peers peers)
{
name = null;
aliases = null;
primaryHost = null;
primaryAddress = null;
primaryConn = null;
sessionToken = null;
sessionExpiration = null;
features = 0;
IPAddress[] addresses = Connection.GetHostAddresses(host.name, cluster.connectionTimeout);
Exception exception = null;
// Try all addresses because they might point to different nodes.
foreach (IPAddress address in addresses)
{
try
{
ValidateAddress(cluster, address, host.tlsName, host.port, true);
// Only set aliases when they were not set by load balancer detection logic.
if (this.aliases == null)
{
SetAliases(address, host.tlsName, host.port);
}
Node node = cluster.CreateNode(this, false);
if (ValidatePeers(peers, node))
{
return(node);
}
}
catch (Exception e)
{
// Log exception and continue to next alias.
if (Log.DebugEnabled())
{
Log.Debug("Address " + address + ' ' + host.port + " failed: " + Util.GetErrorMessage(e));
}
if (exception == null)
{
exception = e;
}
}
}
// Fallback signifies node exists, but is suspect.
// Return null so other seeds can be tried.
if (fallback != null)
{
return(null);
}
// Exception can't be null here because Connection.GetHostAddresses()
// will throw exception if aliases length is zero.
throw exception;
}
// Switch from TLS connection to non-TLS connection.
internal SwitchClear(Cluster cluster, Connection conn, byte[] sessionToken)
{
// Obtain non-TLS addresses.
string command = cluster.useServicesAlternate ? "service-clear-alt" : "service-clear-std";
string result = Info.Request(conn, command);
List <Host> hosts = Host.ParseServiceHosts(result);
Host clearHost;
// Find first valid non-TLS host.
foreach (Host host in hosts)
{
try
{
clearHost = host;
string alternativeHost;
if (cluster.ipMap != null && cluster.ipMap.TryGetValue(clearHost.name, out alternativeHost))
{
clearHost = new Host(alternativeHost, clearHost.port);
}
IPAddress[] addresses = Connection.GetHostAddresses(clearHost.name, cluster.connectionTimeout);
foreach (IPAddress ia in addresses)
{
try
{
clearAddress = ia;
clearSocketAddress = new IPEndPoint(ia, clearHost.port);
clearConn = new Connection(clearSocketAddress, cluster.connectionTimeout, null);
try
{
AdminCommand admin = new AdminCommand(ThreadLocalData.GetBuffer(), 0);
if (!admin.Authenticate(cluster, clearConn, sessionToken))
{
throw new AerospikeException("Authentication failed");
}
return; // Authenticated clear connection.
}
catch (Exception)
{
clearConn.Close();
}
}
catch (Exception)
{
// Try next address.
}
}
}
catch (Exception)
{
// Try next host.
}
}
throw new AerospikeException("Invalid non-TLS address: " + result);
}
private IPAddress[] SetAliases(Cluster cluster, Host host)
{
IPAddress[] addresses = Connection.GetHostAddresses(host.name, cluster.connectionTimeout);
aliases = new Host[addresses.Length];
for (int i = 0; i < addresses.Length; i++)
{
aliases[i] = new Host(addresses[i].ToString(), host.port);
}
return(addresses);
}
/// <summary>
/// Add node(s) referenced by seed host aliases. In most cases, aliases reference
/// a single node. If round robin DNS configuration is used, the seed host may have
/// several addresses that reference different nodes in the cluster.
/// </summary>
public void SeedNodes(Cluster cluster, Host host, Dictionary <string, Node> nodesToAdd)
{
IPAddress[] addresses = Connection.GetHostAddresses(host.name, cluster.connectionTimeout);
Exception exception = null;
bool found = false;
// Try all addresses because they might point to different nodes.
foreach (IPAddress address in addresses)
{
try
{
ValidateAddress(cluster, address, host.tlsName, host.port, true);
found = true;
if (!nodesToAdd.ContainsKey(name))
{
// New node found.
// Only set aliases when they were not set by load balancer detection logic.
if (this.aliases == null)
{
SetAliases(addresses, host.tlsName, host.port);
}
Node node = cluster.CreateNode(this);
nodesToAdd[name] = node;
}
else
{
// Node already referenced. Close connection.
primaryConn.Close();
}
}
catch (Exception e)
{
// Log and continue to next address.
if (Log.DebugEnabled())
{
Log.Debug("Address " + address + ' ' + host.port + " failed: " + Util.GetErrorMessage(e));
}
if (exception == null)
{
exception = e;
}
}
}
if (!found)
{
// Exception can't be null here because Connection.GetHostAddresses()
// will throw exception if aliases length is zero.
throw exception;
}
}
private IPAddress[] SetAliases(Cluster cluster, Host host)
{
IPAddress[] addresses = Connection.GetHostAddresses(host.name, cluster.connectionTimeout);
// Add capacity for current address aliases plus IPV6 address and hostname.
aliases = new List <Host>(addresses.Length + 2);
foreach (IPAddress address in addresses)
{
aliases.Add(new Host(address.ToString(), host.tlsName, host.port));
}
return(addresses);
}
/// <summary>
/// Return first valid node referenced by seed host aliases. In most cases, aliases
/// reference a single node. If round robin DNS configuration is used, the seed host
/// may have several addresses that reference different nodes in the cluster.
/// </summary>
public Node SeedNode(Cluster cluster, Host host)
{
IPAddress[] addresses = Connection.GetHostAddresses(host.name, cluster.connectionTimeout);
Exception exception = null;
// Try all addresses because they might point to different nodes.
foreach (IPAddress address in addresses)
{
try
{
ValidateAddress(cluster, address, host.tlsName, host.port, true);
// Only set aliases when they were not set by load balancer detection logic.
if (this.aliases == null)
{
SetAliases(address, host.tlsName, host.port);
}
return(cluster.CreateNode(this));
}
catch (Exception e)
{
// Log exception and continue to next alias.
if (Log.DebugEnabled())
{
Log.Debug("Address " + address + ' ' + host.port + " failed: " + Util.GetErrorMessage(e));
}
if (exception == null)
{
exception = e;
}
}
}
// Exception can't be null here because Connection.GetHostAddresses()
// will throw exception if aliases length is zero.
throw exception;
}
private void SetAddress(Cluster cluster, Dictionary <string, string> map, string addressCommand, string tlsName)
{
string result;
if (!map.TryGetValue(addressCommand, out result) || result == null || result.Length == 0)
{
// Server does not support service level call (service-clear-std, ...).
// Load balancer detection is not possible.
return;
}
List <Host> hosts = Host.ParseServiceHosts(result);
Host h;
// Search real hosts for seed.
foreach (Host host in hosts)
{
h = host;
string alt;
if (cluster.ipMap != null && cluster.ipMap.TryGetValue(h.name, out alt))
{
h = new Host(alt, h.port);
}
if (h.Equals(this.primaryHost))
{
// Found seed which is not a load balancer.
return;
}
}
// Seed not found, so seed is probably a load balancer.
// Find first valid real host.
foreach (Host host in hosts)
{
try
{
h = host;
string alt;
if (cluster.ipMap != null && cluster.ipMap.TryGetValue(h.name, out alt))
{
h = new Host(alt, h.port);
}
IPAddress[] addresses = Connection.GetHostAddresses(h.name, cluster.connectionTimeout);
foreach (IPAddress address in addresses)
{
try
{
IPEndPoint socketAddress = new IPEndPoint(address, h.port);
Connection conn = (cluster.tlsPolicy != null) ?
new TlsConnection(cluster.tlsPolicy, tlsName, socketAddress, cluster.connectionTimeout, null) :
new Connection(socketAddress, cluster.connectionTimeout, null);
try
{
if (cluster.user != null)
{
AdminCommand admin = new AdminCommand(ThreadLocalData.GetBuffer(), 0);
if (!admin.Authenticate(cluster, conn, this.sessionToken))
{
throw new AerospikeException("Authentication failed");
}
}
// Authenticated connection. Set real host.
SetAliases(address, tlsName, h.port);
this.primaryHost = new Host(address.ToString(), tlsName, h.port);
this.primaryAddress = socketAddress;
this.primaryConn.Close();
this.primaryConn = conn;
return;
}
catch (Exception)
{
conn.Close();
}
}
catch (Exception)
{
// Try next address.
}
}
}
catch (Exception)
{
// Try next host.
}
}
// Failed to find a valid address. IP Address is probably internal on the cloud
// because the server access-address is not configured. Log warning and continue
// with original seed.
if (Log.InfoEnabled())
{
Log.Info("Invalid address " + result + ". access-address is probably not configured on server.");
}
}
public NodeValidator(Cluster cluster, Host host)
{
IPAddress[] addresses = Connection.GetHostAddresses(host.name, DEFAULT_TIMEOUT);
aliases = new Host[addresses.Length];
for (int i = 0; i < addresses.Length; i++)
{
aliases[i] = new Host(addresses[i].ToString(), host.port);
}
Exception exception = null;
for (int i = 0; i < addresses.Length; i++)
{
try
{
IPEndPoint address = new IPEndPoint(addresses[i], host.port);
Connection conn = new Connection(address, cluster.connectionTimeout);
try
{
if (cluster.user != null)
{
AdminCommand command = new AdminCommand();
command.Authenticate(conn, cluster.user, cluster.password);
}
Dictionary <string, string> map = Info.Request(conn, "node", "features");
string nodeName;
if (map.TryGetValue("node", out nodeName))
{
this.name = nodeName;
this.address = address;
SetFeatures(map);
return;
}
}
finally
{
conn.Close();
}
}
catch (Exception e)
{
// Try next address.
if (Log.DebugEnabled())
{
Log.Debug("Alias " + addresses[i] + " failed: " + Util.GetErrorMessage(e));
}
if (exception == null)
{
exception = e;
}
}
}
if (exception == null)
{
throw new AerospikeException.Connection("Failed to find addresses for " + host);
}
throw exception;
}
private void SetAddress(Cluster cluster, Dictionary <string, string> map, string addressCommand, string tlsName)
{
string result = map[addressCommand];
List <Host> hosts = Host.ParseServiceHosts(result);
Host h;
// Search real hosts for seed.
foreach (Host host in hosts)
{
h = host;
string alt;
if (cluster.ipMap != null && cluster.ipMap.TryGetValue(h.name, out alt))
{
h = new Host(alt, h.port);
}
if (h.Equals(this.primaryHost))
{
// Found seed which is not a load balancer.
return;
}
}
// Seed not found, so seed is probably a load balancer.
// Find first valid real host.
foreach (Host host in hosts)
{
try
{
h = host;
string alt;
if (cluster.ipMap != null && cluster.ipMap.TryGetValue(h.name, out alt))
{
h = new Host(alt, h.port);
}
IPAddress[] addresses = Connection.GetHostAddresses(h.name, cluster.connectionTimeout);
foreach (IPAddress address in addresses)
{
try
{
IPEndPoint socketAddress = new IPEndPoint(address, h.port);
Connection conn = (cluster.tlsPolicy != null) ?
new TlsConnection(cluster.tlsPolicy, tlsName, socketAddress, cluster.connectionTimeout, cluster.maxSocketIdleMillis, null) :
new Connection(socketAddress, cluster.connectionTimeout, cluster.maxSocketIdleMillis, null);
try
{
if (cluster.user != null)
{
AdminCommand admin = new AdminCommand(ThreadLocalData.GetBuffer(), 0);
if (!admin.Authenticate(cluster, conn, this.sessionToken))
{
throw new AerospikeException("Authentication failed");
}
}
// Authenticated connection. Set real host.
SetAliases(addresses, tlsName, h.port);
this.primaryHost = new Host(address.ToString(), tlsName, h.port);
this.primaryAddress = socketAddress;
this.primaryConn.Close();
this.primaryConn = conn;
return;
}
catch (Exception)
{
conn.Close();
}
}
catch (Exception)
{
// Try next address.
}
}
}
catch (Exception)
{
// Try next host.
}
}
// Failed to find a valid host.
throw new AerospikeException("Invalid address: " + result);
}