alluxio.util.network

Class NetworkAddressUtils

java.lang.Object

alluxio.util.network.NetworkAddressUtils

@ThreadSafe
public final class NetworkAddressUtils
extends Object

Common network address related utilities shared by all components in Alluxio.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	NetworkAddressUtils.ServiceType Different types of services that client uses to connect.

Field Summary

Fields

Modifier and Type	Field and Description
static String	UNKNOWN_HOSTNAME
static String	WILDCARD_ADDRESS
static boolean	WINDOWS Checks if the underlying OS is Windows.

Method Summary

Modifier and Type	Method and Description
static void	assertValidPort(InetSocketAddress address) Checks if the given port in the address is valid.
static void	assertValidPort(int port) Checks if the given port is valid.
static InetSocketAddress	getBindAddress(NetworkAddressUtils.ServiceType service, AlluxioConfiguration conf) Helper method to get the bind hostname for a given service.
static String	getBindHost(NetworkAddressUtils.ServiceType service, AlluxioConfiguration conf) Helper method to get the InetSocketAddress bind address on a given service.
static String	getClientHostName(AlluxioConfiguration conf) Gets the local hostname to be used by the client.
static InetSocketAddress	getConnectAddress(NetworkAddressUtils.ServiceType service, AlluxioConfiguration conf) Helper method to get the InetSocketAddress address for client to communicate with the service.
static String	getConnectHost(NetworkAddressUtils.ServiceType service, AlluxioConfiguration conf) Provides an externally resolvable hostname for client to communicate with the service.
static SocketAddress	getDataPortSocketAddress(WorkerNetAddress netAddress, AlluxioConfiguration conf) Extracts dataPort socket address from Alluxio representation of network address.
static String	getFqdnHost(InetSocketAddress addr) Gets FQDN(Full Qualified Domain Name) from Java representations of network address, except String representation which should be handled by resolveHostName(String) which will handle the situation where hostname is null.
static String	getFqdnHost(WorkerNetAddress addr) Gets FQDN(Full Qualified Domain Name) from Alluxio representation of network address.
static String	getLocalHostMetricName(int timeoutMs) Gets a local hostname for the host this JVM is running on with '.' replaced with '_' for metrics usage.
static String	getLocalHostName(int timeoutMs) Gets a local host name for the host this JVM is running on.
static String	getLocalIpAddress(int timeoutMs) Gets a local IP address for the host this JVM is running on.
static String	getLocalNodeName(AlluxioConfiguration conf) Gets a local node name from configuration if it is available, falling back on localhost lookup.
static int	getPort(NetworkAddressUtils.ServiceType service, AlluxioConfiguration conf) Gets the port number on a given service type.
static InetSocketAddress	getRpcPortSocketAddress(WorkerNetAddress netAddress) Extracts rpcPort InetSocketAddress from Alluxio representation of network address.
static boolean	isServing(String host, int port)
static InetSocketAddress	parseInetSocketAddress(String address) Parses InetSocketAddress from a String.
static void	pingService(InetSocketAddress address, ServiceType serviceType, AlluxioConfiguration conf, UserState userState) Test if the input address is serving an Alluxio service.
static String	resolveHostName(String hostname) Resolves a given hostname by a canonical hostname.
static String	resolveIpAddress(String hostname) Resolves a given hostname IP address.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

WILDCARD_ADDRESS

public static final String WILDCARD_ADDRESS

See Also:

Constant Field Values

UNKNOWN_HOSTNAME

public static final String UNKNOWN_HOSTNAME

See Also:

Constant Field Values

WINDOWS

public static final boolean WINDOWS

Checks if the underlying OS is Windows.

Method Detail

assertValidPort

public static void assertValidPort(int port)

Checks if the given port is valid.

Parameters:

port - the port to check

assertValidPort

public static void assertValidPort(InetSocketAddress address)

Checks if the given port in the address is valid.

Parameters:

address - the InetSocketAddress with the port to check

getConnectAddress

public static InetSocketAddress getConnectAddress(NetworkAddressUtils.ServiceType service,
                                                  AlluxioConfiguration conf)

Helper method to get the InetSocketAddress address for client to communicate with the service.

Parameters:

service - the service name used to connect

conf - the configuration to use for looking up the connect address

Returns:

the service address that a client (typically outside the service machine) uses to communicate with service.

getConnectHost

public static String getConnectHost(NetworkAddressUtils.ServiceType service,
                                    AlluxioConfiguration conf)

Provides an externally resolvable hostname for client to communicate with the service. If the hostname is not explicitly specified, Alluxio will try to use the bind host. If the bind host is wildcard, Alluxio will automatically determine an appropriate hostname from local machine. The various possibilities shown in the following table:

Hostname Scenarios

Specified Hostname	Specified Bind Host	Enable Network IP Address Used	Returned Connect Host
hostname	hostname	true/false	hostname
not defined	hostname	true/false	hostname
hostname	0.0.0.0 or not defined	true/false	hostname
not defined	0.0.0.0 or not defined	false	local hostname
not defined	0.0.0.0 or not defined	true	local IP address

Parameters:

service - Service type used to connect

conf - configuration

Returns:

the externally resolvable hostname that the client can use to communicate with the service.

getPort

public static int getPort(NetworkAddressUtils.ServiceType service,
                          AlluxioConfiguration conf)

Gets the port number on a given service type. If user defined port number is not explicitly specified, Alluxio will use the default service port.

Parameters:

service - Service type used to connect

conf - Alluxio configuration

Returns:

the service port number

getBindAddress

public static InetSocketAddress getBindAddress(NetworkAddressUtils.ServiceType service,
                                               AlluxioConfiguration conf)

Helper method to get the bind hostname for a given service.

Parameters:

service - the service name

conf - Alluxio configuration

Returns:

the InetSocketAddress the service will bind to

getBindHost

public static String getBindHost(NetworkAddressUtils.ServiceType service,
                                 AlluxioConfiguration conf)

Helper method to get the InetSocketAddress bind address on a given service.

Host bind information searching order:

1. System properties or environment variables via alluxio-env.sh
2. Default properties via alluxio-default.properties file
3. A externally resolvable local hostname for the host this JVM is running on

Parameters:

service - the service name

conf - Alluxio configuration

Returns:

the bind hostname

getClientHostName

public static String getClientHostName(AlluxioConfiguration conf)

Gets the local hostname to be used by the client. If this isn't configured, a non-loopback local hostname will be looked up.

Parameters:

conf - Alluxio configuration

Returns:

the local hostname for the client

getLocalNodeName

public static String getLocalNodeName(AlluxioConfiguration conf)

Gets a local node name from configuration if it is available, falling back on localhost lookup.

Parameters:

conf - Alluxio configuration

Returns:

the local node name

getLocalHostName

public static String getLocalHostName(int timeoutMs)

Gets a local host name for the host this JVM is running on.

Parameters:

timeoutMs - Timeout in milliseconds to use for checking that a possible local host is reachable

Returns:

the local host name, which is not based on a loopback ip address

getLocalHostMetricName

public static String getLocalHostMetricName(int timeoutMs)

Gets a local hostname for the host this JVM is running on with '.' replaced with '_' for metrics usage.

Parameters:

timeoutMs - Timeout in milliseconds to use for checking that a possible local host is reachable

Returns:

the metrics system friendly local host name

getLocalIpAddress

public static String getLocalIpAddress(int timeoutMs)

Gets a local IP address for the host this JVM is running on.

Parameters:

timeoutMs - Timeout in milliseconds to use for checking that a possible local IP is reachable

Returns:

the local ip address, which is not a loopback address and is reachable

isServing

public static boolean isServing(String host,
                                int port)

Parameters:

host - the host to try to connect to

port - the port to try to connect on

Returns:

whether a socket connection can be made to the given host on the given port

resolveHostName

@Nullable
public static String resolveHostName(String hostname)
                                        throws UnknownHostException

Resolves a given hostname by a canonical hostname. When a hostname alias (e.g., those specified in /etc/hosts) is given, the alias may not be resolvable on other hosts in a cluster unless the same alias is defined there.

Parameters:

hostname - the input hostname, which could be an alias

Returns:

the canonical form of the hostname, or null if it is null or empty

Throws:

UnknownHostException - if the given hostname cannot be resolved

resolveIpAddress

public static String resolveIpAddress(String hostname)
                               throws UnknownHostException

Resolves a given hostname IP address.

Parameters:

hostname - the input hostname, which could be an alias

Returns:

the hostname IP address

Throws:

UnknownHostException - if the given hostname cannot be resolved

getFqdnHost

public static String getFqdnHost(InetSocketAddress addr)

Gets FQDN(Full Qualified Domain Name) from Java representations of network address, except String representation which should be handled by resolveHostName(String) which will handle the situation where hostname is null.

Parameters:

addr - the input network address representation, can not be null

Returns:

the resolved FQDN host name

getFqdnHost

public static String getFqdnHost(WorkerNetAddress addr)
                          throws UnknownHostException

Gets FQDN(Full Qualified Domain Name) from Alluxio representation of network address.

Parameters:

addr - the input network address representation

Returns:

the resolved FQDN host name

Throws:

UnknownHostException - if the host is not known

parseInetSocketAddress

@Nullable
public static InetSocketAddress parseInetSocketAddress(String address)
                                                          throws IOException

Parses InetSocketAddress from a String.

Parameters:

address - socket address to parse

Returns:

InetSocketAddress of the String

Throws:

IOException

getRpcPortSocketAddress

public static InetSocketAddress getRpcPortSocketAddress(WorkerNetAddress netAddress)

Extracts rpcPort InetSocketAddress from Alluxio representation of network address.

Parameters:

netAddress - the input network address representation

Returns:

InetSocketAddress

getDataPortSocketAddress

public static SocketAddress getDataPortSocketAddress(WorkerNetAddress netAddress,
                                                     AlluxioConfiguration conf)

Extracts dataPort socket address from Alluxio representation of network address.

Parameters:

netAddress - the input network address representation

conf - Alluxio configuration

Returns:

the socket address

pingService

public static void pingService(InetSocketAddress address,
                               ServiceType serviceType,
                               AlluxioConfiguration conf,
                               UserState userState)
                        throws AlluxioStatusException

Test if the input address is serving an Alluxio service. This method make use of the gRPC protocol for performing service communication.

Parameters:

address - the network address to ping

serviceType - the Alluxio service type

conf - Alluxio configuration

userState - the UserState

Throws:

UnauthenticatedException - If the user is not authenticated

io.grpc.StatusRuntimeException - If the host not reachable or does not serve the given service

AlluxioStatusException