public override void Init(string contextName, ContextFactory factory)
{
base.Init(contextName, factory);
Log.Debug("Initializing the GangliaContext31 for Ganglia 3.1 metrics.");
// Take the hostname from the DNS class.
Configuration conf = new Configuration();
if (conf.Get("slave.host.name") != null)
{
hostName = conf.Get("slave.host.name");
}
else
{
try
{
hostName = DNS.GetDefaultHost(conf.Get("dfs.datanode.dns.interface", "default"),
conf.Get("dfs.datanode.dns.nameserver", "default"));
}
catch (UnknownHostException uhe)
{
Log.Error(uhe);
hostName = "UNKNOWN.example.com";
}
}
}
/*
* Output of "gmetric --help" showing allowable values
* -t, --type=STRING
* Either string|int8|uint8|int16|uint16|int32|uint32|float|double
* -u, --units=STRING Unit of measure for the value e.g. Kilobytes, Celcius
* (default='')
* -s, --slope=STRING Either zero|positive|negative|both
* (default='both')
* -x, --tmax=INT The maximum time in seconds between gmetric calls
* (default='60')
*/
// as per libgmond.c
// 0
// 1
// 2
// 3
/*
* (non-Javadoc)
*
* @see
* org.apache.hadoop.metrics2.MetricsPlugin#init(org.apache.commons.configuration
* .SubsetConfiguration)
*/
public virtual void Init(SubsetConfiguration conf)
{
Log.Debug("Initializing the GangliaSink for Ganglia metrics.");
this.conf = conf;
// Take the hostname from the DNS class.
if (conf.GetString("slave.host.name") != null)
{
hostName = conf.GetString("slave.host.name");
}
else
{
try
{
hostName = DNS.GetDefaultHost(conf.GetString("dfs.datanode.dns.interface", "default"
), conf.GetString("dfs.datanode.dns.nameserver", "default"));
}
catch (UnknownHostException uhe)
{
Log.Error(uhe);
hostName = "UNKNOWN.example.com";
}
}
// load the gannglia servers from properties
metricsServers = Servers.Parse(conf.GetString(ServersProperty), DefaultPort);
multicastEnabled = conf.GetBoolean(MulticastEnabledProperty, DefaultMulticastEnabled
);
multicastTtl = conf.GetInt(MulticastTtlProperty, DefaultMulticastTtl);
// extract the Ganglia conf per metrics
gangliaConfMap = new Dictionary <string, GangliaConf>();
LoadGangliaConf(AbstractGangliaSink.GangliaConfType.units);
LoadGangliaConf(AbstractGangliaSink.GangliaConfType.tmax);
LoadGangliaConf(AbstractGangliaSink.GangliaConfType.dmax);
LoadGangliaConf(AbstractGangliaSink.GangliaConfType.slope);
try
{
if (multicastEnabled)
{
Log.Info("Enabling multicast for Ganglia with TTL " + multicastTtl);
datagramSocket = new MulticastSocket();
((MulticastSocket)datagramSocket).SetTimeToLive(multicastTtl);
}
else
{
datagramSocket = new DatagramSocket();
}
}
catch (IOException e)
{
Log.Error(e);
}
// see if sparseMetrics is supported. Default is false
supportSparseMetrics = conf.GetBoolean(SupportSparseMetricsProperty, SupportSparseMetricsDefault
);
}
/// <summary>
/// Attempt to determine the fully qualified domain name for this host
/// to compare during testing.
/// </summary>
/// <remarks>
/// Attempt to determine the fully qualified domain name for this host
/// to compare during testing.
/// This is necessary because in order for the BackupNode test to correctly
/// work, the namenode must have its http server started with the fully
/// qualified address, as this is the one the backupnode will attempt to start
/// on as well.
/// </remarks>
/// <returns>Fully qualified hostname, or 127.0.0.1 if can't determine</returns>
public static string GetFullHostName()
{
try
{
return(DNS.GetDefaultHost("default"));
}
catch (UnknownHostException)
{
Log.Warn("Unable to determine hostname. May interfere with obtaining " + "valid test results."
);
return("127.0.0.1");
}
}
