#sudo apt-cache show ganglia-webfrontend ganglia-monitor

#sudo apt-get install ganglia-webfrontend ganglia-monitor

#sudo ln -s /usr/share/ganglia-webfront /var/www/ganglia

globals {                    
  daemonize = yes              #以后台的方式运行
  setuid = yes
  user = ganglia              #运行gmond的用户
  debug_level = 0             #调试级别
  max_udp_msg_len = 1472      
  mute = no       #哑巴，本节点将不会再广播任何自己收集到的数据在网络上  
  deaf = no       #聋子，本节点不会再接收任何其他节点广播的数据包      
  host_dmax = 0 /*secs */ 
  cleanup_threshold = 300 /*secs */ 
  gexec = no             #是否使用gexec
  send_metadata_interval = 10     #节点发送间隔/*secs*/
} 

/* If a cluster attribute is specified, then all gmond hosts are wrapped inside 
 * of a  tag.  If you do not specify a cluster tag, then all  will 
 * NOT be wrapped inside of a  tag. */ 
cluster { 
  name = "hadoop"   #本节点属于哪个cluster
  owner = "unspecified"        #谁是该节点的所有者
  latlong = "unspecified"    #在地球上的坐标
  url = "unspecified" 
} 

/* The host section describes attributes of the host, like the location */ 
host { 
  location = "unspecified" 
} 

/* Feel free to specify as many udp_send_channels as you like.  Gmond 
   used to only support having a single channel */ 
udp_send_channel {    #udp包的发送通道
  host = 10.82.58.211        #多播，工作在239.2.11.71通道下。单播，则指向主节点，单播模式下也可以配置多个udp_send_channel
  port = 8649            #监听端口
  ttl = 1 
} 

/* You can specify as many udp_recv_channels as you like as well. */ 
udp_recv_channel {  #接受UDP包配置
# mcast_join = 239.2.11.71
  port = 8649 
# bind = 239.2.11.71
}

# syntax: [prefix].[source|sink|jmx].[instance].[options]
# See package.html for org.apache.hadoop.metrics2 for details

*.sink.file.class=org.apache.hadoop.metrics2.sink.FileSink

#namenode.sink.file.filename=namenode-metrics.out

#datanode.sink.file.filename=datanode-metrics.out

#jobtracker.sink.file.filename=jobtracker-metrics.out

#tasktracker.sink.file.filename=tasktracker-metrics.out

#maptask.sink.file.filename=maptask-metrics.out

#reducetask.sink.file.filename=reducetask-metrics.out
# Below are for sending metrics to Ganglia
#
# for Ganglia 3.0 support
# *.sink.ganglia.class=org.apache.hadoop.metrics2.sink.ganglia.GangliaSink30
#
# for Ganglia 3.1 support
*.sink.ganglia.class=org.apache.hadoop.metrics2.sink.ganglia.GangliaSink31

*.sink.ganglia.period=10

# default for supportsparse is false
*.sink.ganglia.supportsparse=true

*.sink.ganglia.slope=jvm.metrics.gcCount=zero,jvm.metrics.memHeapUsedM=both
*.sink.ganglia.dmax=jvm.metrics.threadsBlocked=70,jvm.metrics.memHeapUsedM=40

namenode.sink.ganglia.servers=10.82.58.211:8649

datanode.sink.ganglia.servers=10.82.58.211:8649

jobtracker.sink.ganglia.servers=10.82.58.211:8649

tasktracker.sink.ganglia.servers=10.82.58.211:8649

maptask.sink.ganglia.servers=10.82.58.211:8649

reducetask.sink.ganglia.servers=10.82.58.211:8649

# HBase-specific configuration to reset long-running stats (e.g. compactions)
# If this variable is left out, then the default is no expiration.
hbase.extendedperiod = 3600

# Configuration of the "hbase" context for ganglia
# Pick one: Ganglia 3.0 (former) or Ganglia 3.1 (latter)
# hbase.class=org.apache.hadoop.metrics.ganglia.GangliaContext
hbase.class=org.apache.hadoop.metrics.ganglia.GangliaContext31
hbase.period=10
hbase.servers=10.82.58.211:8649

# Configuration of the "jvm" context for null
jvm.class=org.apache.hadoop.metrics.spi.NullContextWithUpdateThread
jvm.period=10

# Configuration of the "jvm" context for file
# jvm.class=org.apache.hadoop.hbase.metrics.file.TimeStampingFileContext
# jvm.fileName=/tmp/metrics_jvm.log

# Configuration of the "jvm" context for ganglia
# Pick one: Ganglia 3.0 (former) or Ganglia 3.1 (latter)
# jvm.class=org.apache.hadoop.metrics.ganglia.GangliaContext
jvm.class=org.apache.hadoop.metrics.ganglia.GangliaContext31
jvm.period=10
jvm.servers=10.82.58.211:8649

# Configuration of the "rpc" context for null
rpc.class=org.apache.hadoop.metrics.spi.NullContextWithUpdateThread
rpc.period=10

# Configuration of the "rpc" context for file
# rpc.class=org.apache.hadoop.hbase.metrics.file.TimeStampingFileContext
# rpc.fileName=/tmp/metrics_rpc.log

# Configuration of the "rpc" context for ganglia
# Pick one: Ganglia 3.0 (former) or Ganglia 3.1 (latter)
# rpc.class=org.apache.hadoop.metrics.ganglia.GangliaContext
 rpc.class=org.apache.hadoop.metrics.ganglia.GangliaContext31
 rpc.period=10
 rpc.servers=10.82.58.211:8649

# Configuration of the "rest" context for ganglia
# Pick one: Ganglia 3.0 (former) or Ganglia 3.1 (latter)
# rest.class=org.apache.hadoop.metrics.ganglia.GangliaContext
 rest.class=org.apache.hadoop.metrics.ganglia.GangliaContext31
 rest.period=10
 rest.servers=10.82.58.211:8649

#sudo service ganglia-monitor start
#sudo service gmetad start