Bigdata：
结构化数据：有元数据，有约束
半结构化数据：有元数据，无约束
非结构化数据：没有元数据；
搜索引擎：搜索组件、索引组件
蜘蛛程序：
存储：
分析处理：
2003年：The Google File System
2004年：MapReduce：Simplified Data Processing On Large Cluster
2006年：BigTable：A Distributed Storage System for Structure Data
HDFS + MapReduce = Hadoop
Hbase
Nutch
批处理：
函数式编程：
Lisp, ML函数式编程语言：高阶函数；
map, fold
map：
map(f())
map：接受一个函数为参数，并将其应用于列表中的所有元素；从而生成一个结果列表
fold：
接受两个参数：函数，初始值
fold(g(),init)
mapreduce：
mapper：
reducer：
shuffle and sort
MRv1(Haddop2) --> MRv2(Haddop2)
MRv1： Cluster resource manager, Data processing
MRv2：
YARN：Cluster resourse manager
MRv2：Data process
MR：batch
Tez：execution engine
RM：Resource Manager
NM：Node Manager
AM：Application Master
container：mr任务；hadoop官网：http://hadoop.apache.org
Hadoop Distribution：
Cloudera：CDH
Hortonworks：HDP
Intel：IDH
MapR
Haddop安装模型：
单机模型：测试使用
伪分布式模型：运行于单机。
分布式模型：集群模型
Hadoop，基于Java语言
jdk：1.6，1.7，1.8
hadoop-2.6.2 jdk 1.6+
hadoop-2.7
mapreduce工作思路：
多个part情况mapreduce执行过程：
一个part情况mapreduce执行过程：
Job Tracker内部场景：
Hadoop版本架构：
Applications Run Natively IN Hadoop：
Hadoop2.0作业任务：
Hadoop发展路线：
Hadoop生态圈：
User Commands
dfs
fetchdt
fsck
version
Administration Commands
balancer
datanode
dfsadmin
mover
namenode
secondarynamenode
Hadoop Cluster中Daemon：
HDFS：
NameNode，NN
SecondaryNameNode，SNN
DataNode，DN
/data/hadoop/hdfs/{nn,snn,dn}
nn: fsimage，editlog
hadoop-daemon.sh
start|stop
YARN：
ResourceManager
NodeManager
yarn-daemon.sh start|stop官方提供Ambari自动部署hadoop工具
单节点的Hadoop伪分布式模型部署：
实验环境：
主机名称：node1.smoke.com
操作系统：CentOS 7.5
内核版本：3.10.0-862.el7.x86_64
网卡1：172.16.100.67
node1：
[root@node1 ~]# hostname
node1.smoke.com
[root@node1 ~]# ip addr show
1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:67:e5:70 brd ff:ff:ff:ff:ff:ff
inet 172.16.100.67/24 brd 172.16.100.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::7382:eaed:fa1f:633f/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: ens37: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:67:e5:7a brd ff:ff:ff:ff:ff:ff
inet 192.168.243.128/24 brd 192.168.243.255 scope global noprefixroute dynamic ens37
valid_lft 1773sec preferred_lft 1773sec
inet6 fe80::9612:1176:5405:40dd/64 scope link noprefixroute
valid_lft forever preferred_lft forever
[root@node1 ~]# ip route show
default via 192.168.243.2 dev ens37 proto dhcp metric 101
172.16.100.0/24 dev ens33 proto kernel scope link src 172.16.100.67 metric 100
192.168.243.0/24 dev ens37 proto kernel scope link src 192.168.243.128 metric 101
[root@node1 ~]# crontab -l
*/5 * * * * /usr/sbin/ntpdate ntp1.aliyun.com &> /dev/null
[root@node1 ~]# yum -y install java
[root@node1 ~]# java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-b04)
OpenJDK 64-Bit Server VM (build 25.212-b04, mixed mode)
[root@node1 ~]# vim /etc/profile.d/java.sh
export JAVA_HOME=/usr
[root@node1 ~]# yum -y install java-1.8.0-openjdk-devel
[root@node1 ~]# ls -lh
总用量 187M
-rw-------. 1 root root 1.3K 5月 4 06:20 anaconda-ks.cfg
-rw-r--r--. 1 root root 187M 5月 5 20:57 hadoop-2.6.2.tar.gz
[root@node1 ~]# mkdir /bdapps
[root@node1 ~]# tar xf hadoop-2.6.2.tar.gz -C /bdapps/
[root@node1 ~]# cd /bdapps/
[root@node1 bdapps]# ln -sv hadoop-2.6.2 hadoop
[root@node1 bdapps]# cd hadoop
[root@node1 hadoop]# vim /etc/profile.d/hadoop.sh
export HADOOP_PREFIX=/bdapps/hadoop
export PATH=$PATH:${HADOOP_PREFIX}/bin:${HADOOP_PREFIX}/sbin
export HADOOP_YARN_HOME=${HADOOP_PREFIX}
export HADOOP_MAPPERD_HOME=${HADOOP_PREFIX}
export HADOOP_COMMON_HOME=${HADOOP_PREFIX}
export HADOOP_HDFS_HOME=${HADOOP_PREFIX}
[root@node1 hadoop]# . /etc/profile.d/hadoop.sh
[root@node1 hadoop]# groupadd hadoop
[root@node1 hadoop]# useradd -g hadoop yarn
[root@node1 hadoop]# useradd -g hadoop hdfs
[root@node1 hadoop]# useradd -g hadoop mapred
[root@node1 hadoop]# mkdir -pv /data/hadoop/hdfs/{nn,snn,dn}
[root@node1 hadoop]# chown -R hdfs:hadoop /data/hadoop/hdfs/
[root@node1 hadoop]# mkdir logs
[root@node1 hadoop]# chmod g+w logs
[root@node1 hadoop]# chown -R yarn:hadoop logs
[root@node1 hadoop]# chown -R yarn:hadoop ./*
[root@node1 hadoop]# cd etc/hadoop/
[root@node1 hadoop]# vim core-site.xml
fs.defaultFS
hdfs://localhost:8020
true
[root@node1 hadoop]# vim hdfs-site.xml
dfs.replication
1
dfs.namenode.name.dir
file:///data/hadoop/hdfs/nn
dfs.datanode.data.dir
file:///data/hadoop/hdfs/dn
fs.checkpoint.dir
file:///data/hadoop/hdfs/snn
fs.checkpoint.edits.dir
file:///data/hadoop/hdfs/snn
[root@node1 hadoop]# cp mapred-site.xml.template mapred-site.xml
[root@node1 hadoop]# vim mapred-site.xml
mapreduce.framework.name
yarn
[root@node1 hadoop]# chown yarn:hadoop mapred-site.xml
[root@node1 hadoop]# vim yarn-site.xml
yarn.resourcemanager.address
localhost:8032
yarn.resourcemanager.scheduler.address
localhost:8030
yarn.resourcemanager.resource-tracker.address
localhost:8031
yarn.resourcemanager.admin.address
localhost:8033
yarn.resourcemanager.webapp.address
localhost:8088
yarn.nodemanager.aux-services
mapreduce_shuffle
yarn.nodemanager.auxservices.mapreduce_shuffle.class
org.apache.hadoop.mapred.ShuffleHandler
yarn.resourcemanager.scheduler.class
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler
[root@node1 hadoop]# cat slaves
localhost
[root@node1 hadoop]# su - hdfs
[hdfs@node1 ~]$ hdfs namenode -format
[hdfs@node1 ~]$ ls /data/hadoop/hdfs/nn/
current
[hdfs@node1 ~]$ ls /data/hadoop/hdfs/nn/current/
fsimage_0000000000000000000 fsimage_0000000000000000000.md5 seen_txid VERSION
[hdfs@node1 ~]$ hadoop-daemon.sh start namenode
[hdfs@node1 ~]$ ls /bdapps/hadoop/logs/
hadoop-hdfs-namenode-node1.smoke.com.log hadoop-hdfs-namenode-node1.smoke.com.out SecurityAuth-hdfs.audit
[hdfs@node1 ~]$ jps
34165 NameNode
34278 Jps
[hdfs@node1 ~]$ jps -v
34324 Jps -Dapplication.home=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.212.b04-0.el7_6.x86_64 -Xms8m
34165 NameNode -Dproc_namenode -Xmx1000m -Djava.net.preferIPv4Stack=true -Dhadoop.log.dir=/bdapps/hadoop/logs -Dhadoop.log.file=hadoop.log -Dhadoop.home.dir=/bdapps/hadoop -Dhadoop.id.str=hdfs -Dhadoop.root.logger=INFO,console -Djava.library.path=/bdapps/hadoop/lib/native -Dhadoop.policy.file=hadoop-policy.xml -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv4Stack=true -Dhadoop.log.dir=/bdapps/hadoop/logs -Dhadoop.log.file=hadoop-hdfs-namenode-node1.smoke.com.log -Dhadoop.home.dir=/bdapps/hadoop -Dhadoop.id.str=hdfs -Dhadoop.root.logger=INFO,RFA -Djava.library.path=/bdapps/hadoop/lib/native -Dhadoop.policy.file=hadoop-policy.xml -Djava.net.preferIPv4Stack=true -Dhadoop.security.logger=INFO,RFAS -Dhdfs.audit.logger=INFO,NullAppender -Dhadoop.security.logger=INFO,RFAS -Dhdfs.audit.logger=INFO,NullAppender -Dhadoop.security.logger=INFO,RFAS -Dhdfs.audit.logger=INFO,NullAppender -Dhadoop.security.logger=INFO,RFAS
[hdfs@node1 ~]$ hadoop-daemon.sh start secondarynamenode
[hdfs@node1 ~]$ jps
34165 NameNode
34393 Jps
34350 SecondaryNameNode
[hdfs@node1 ~]$ hadoop-daemon.sh start datanode
[hdfs@node1 ~]$ jps
34419 DataNode
34165 NameNode
34350 SecondaryNameNode
34495 Jps
[hdfs@node1 ~]$ hdfs dfs -ls /
[hdfs@node1 ~]$ hdfs dfs -mkdir /test
[hdfs@node1 ~]$ hdfs dfs -ls /
Found 1 items
drwxr-xr-x - hdfs supergroup 0 2019-05-07 22:08 /test
[hdfs@node1 ~]$ hdfs dfs -put /etc/fstab /user/hdfs/fstab
[hdfs@node1 ~]$ hdfs dfs -put /etc/fstab /test/fstab
[hdfs@node1 ~]$ hdfs dfs -lsr /
lsr: DEPRECATED: Please use 'ls -R' instead.
drwxr-xr-x - hdfs supergroup 0 2019-05-07 22:11 /test
-rw-r--r-- 1 hdfs supergroup 541 2019-05-07 22:11 /test/fstab
[hdfs@node1 ~]$ ls /data/hadoop/hdfs/dn/current/BP-715446160-23.23.86.44-1557237309390/current/finalized/subdir0/subdir0/
blk_1073741825 blk_1073741825_1001.meta
[hdfs@node1 ~]$ file /data/hadoop/hdfs/dn/current/BP-715446160-23.23.86.44-1557237309390/current/finalized/subdir0/subdir0/blk_1073741825
/data/hadoop/hdfs/dn/current/BP-715446160-23.23.86.44-1557237309390/current/finalized/subdir0/subdir0/blk_1073741825: ASCII text
[hdfs@node1 ~]$ cat /data/hadoop/hdfs/dn/current/BP-715446160-23.23.86.44-1557237309390/current/finalized/subdir0/subdir0/blk_1073741825
#
# /etc/fstab
# Created by anaconda on Sat May 4 06:14:49 2019
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos-root / xfs defaults 0 0
UUID=6f08f050-07b8-4179-81af-5c134cc98879 /boot xfs defaults 0 0
/dev/mapper/centos-home /home xfs defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0
[hdfs@node1 ~]$ hdfs dfs -cat /test/fstab
#
# /etc/fstab
# Created by anaconda on Sat May 4 06:14:49 2019
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos-root / xfs defaults 0 0
UUID=6f08f050-07b8-4179-81af-5c134cc98879 /boot xfs defaults 0 0
/dev/mapper/centos-home /home xfs defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0
[hdfs@node1 ~]$ exit
[root@node1 hadoop]# su - yarn
[yarn@node1 ~]$ yarn-daemon.sh start resourcemanager
[yarn@node1 ~]$ jps
70105 ResourceManager
70333 Jps
[yarn@node1 ~]$ yarn-daemon.sh start nodemanager
[root@node1 hadoop]# ss -tnl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:50020 *:*
LISTEN 0 128 *:50090 *:*
LISTEN 0 128 127.0.0.1:8020 *:*
LISTEN 0 128 *:50070 *:*
LISTEN 0 128 *:22 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 50 *:50010 *:*
LISTEN 0 128 *:50075 *:*
LISTEN 0 128 ::ffff:127.0.0.1:8030 :::*
LISTEN 0 128 ::ffff:127.0.0.1:8031 :::*
LISTEN 0 128 :::40352 :::*
LISTEN 0 128 ::ffff:127.0.0.1:8032 :::*
LISTEN 0 128 ::ffff:127.0.0.1:8033 :::*
LISTEN 0 128 :::8040 :::*
LISTEN 0 128 :::8042 :::*
LISTEN 0 128 :::22 :::*
LISTEN 0 128 ::ffff:127.0.0.1:8088 :::*
LISTEN 0 100 ::1:25 :::*
LISTEN 0 50 :::13562 :::* 通过windows的浏览器访问172.16.100.67:50070；
[root@node1 hadoop]# firefox localhost:8088 &
在yarn上面运行的所有程序；
运行测试程序：
[root@node1 mapreduce]# su - hdfs
[hdfs@node1 ~]$ yarn jar /bdapps/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.2.jar wordcount /test/fstab /test/fstab.out
[hdfs@localhost ~]$ hdfs dfs -ls /test
Found 2 items
-rw-r--r-- 1 hdfs supergroup 541 2019-05-07 22:11 /test/fstab
drwxr-xr-x - hdfs supergroup 0 2019-05-13 20:18 /test/fstab.out
[hdfs@localhost ~]$ hdfs dfs -ls /test/fstab.out
Found 2 items
-rw-r--r-- 1 hdfs supergroup 0 2019-05-13 20:18 /test/fstab.out/_SUCCESS
-rw-r--r-- 1 hdfs supergroup 430 2019-05-13 20:18 /test/fstab.out/part-r-00000
[hdfs@localhost ~]$ hdfs dfs -cat /test/fstab.out/part-r-00000
# 7
'/dev/disk' 1
/ 1
/boot 1
/dev/mapper/centos-home 1
/dev/mapper/centos-root 1
/dev/mapper/centos-swap 1
/etc/fstab 1
/home 1
0 8
06:14:49 1
2019 1
4 1
Accessible 1
Created 1
May 1
Sat 1
See 1
UUID=6f08f050-07b8-4179-81af-5c134cc98879 1
anaconda 1
and/or 1
are 1
blkid(8) 1
by 2
defaults 4
filesystems, 1
findfs(8), 1
for 1
fstab(5), 1
info 1
maintained 1
man 1
more 1
mount(8) 1
on 1
pages 1
reference, 1
swap 2
under 1
xfs 3分布式模型：
实验环境：
主机名称：node1.smoke.com master
操作系统：CentOS 7.5
内核版本：3.10.0-862.el7.x86_64
网卡1：172.16.100.67
主机名称：node2.smoke.com
操作系统：CentOS 7.5
内核版本：3.10.0-862.el7.x86_64
网卡1：172.16.100.68
主机名称：node3.smoke.com
操作系统：CentOS 7.5
内核版本：3.10.0-862.el7.x86_64
网卡1：172.16.100.69
主机名称：node4.smoke.com
操作系统：CentOS 7.5
内核版本：3.10.0-862.el7.x86_64
网卡1：172.16.100.70
node1：
[root@node1 ~]# hostname
node1.smoke.com
[root@node1 ~]# ip addr show
1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:67:e5:70 brd ff:ff:ff:ff:ff:ff
inet 172.16.100.67/24 brd 172.16.100.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::7382:eaed:fa1f:633f/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: ens37: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:67:e5:7a brd ff:ff:ff:ff:ff:ff
inet 192.168.243.135/24 brd 192.168.243.255 scope global noprefixroute dynamic ens37
valid_lft 1492sec preferred_lft 1492sec
inet6 fe80::9612:1176:5405:40dd/64 scope link noprefixroute
valid_lft forever preferred_lft forever
[root@node1 ~]# ip route show
default via 192.168.243.2 dev ens37 proto dhcp metric 101
172.16.100.0/24 dev ens33 proto kernel scope link src 172.16.100.67 metric 100
192.168.243.0/24 dev ens37 proto kernel scope link src 192.168.243.135 metric 101
[root@node1 ~]# crontab -l
*/5 * * * * /usr/sbin/ntpdate ntp1.aliyun.com &> /dev/null
[root@node1 ~]# vim /etc/hosts
172.16.100.67 node1.smoke.com node1 master
172.16.100.68 node2.smoke.com node2
172.16.100.69 node3.smoke.com node3
172.16.100.70 node4.smoke.com node4 node2：
[root@node2 ~]# hostname
node2.smoke.com
[root@node2 ~]# ip addr show
1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:70:86:6c brd ff:ff:ff:ff:ff:ff
inet 172.16.100.68/24 brd 172.16.100.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::d665:1c67:c985:a1cf/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: ens37: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:70:86:76 brd ff:ff:ff:ff:ff:ff
inet 192.168.243.136/24 brd 192.168.243.255 scope global noprefixroute dynamic ens37
valid_lft 1773sec preferred_lft 1773sec
inet6 fe80::d698:df07:91e4:43a6/64 scope link noprefixroute
valid_lft forever preferred_lft forever
[root@node2 ~]# ip route show
default via 192.168.243.2 dev ens37 proto dhcp metric 101
172.16.100.0/24 dev ens33 proto kernel scope link src 172.16.100.68 metric 100
192.168.243.0/24 dev ens37 proto kernel scope link src 192.168.243.136 metric 101
[root@node2 ~]# crontab -l
*/5 * * * * /usr/sbin/ntpdate ntp1.aliyun.com &> /dev/null
[root@node2 ~]# vim /etc/hosts
172.16.100.67 node1.smoke.com node1 master
172.16.100.68 node2.smoke.com node2
172.16.100.69 node3.smoke.com node3
172.16.100.70 node4.smoke.com node4 node3：
[root@node3 ~]# hostname
node3.smoke.com
[root@node3 ~]# ip addr show
1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:03:53:27 brd ff:ff:ff:ff:ff:ff
inet 172.16.100.69/24 brd 172.16.100.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::270d:efa4:1975:8122/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: ens37: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:03:53:31 brd ff:ff:ff:ff:ff:ff
inet 192.168.243.134/24 brd 192.168.243.255 scope global noprefixroute dynamic ens37
valid_lft 1651sec preferred_lft 1651sec
inet6 fe80::77b4:1247:f181:d2dc/64 scope link noprefixroute
valid_lft forever preferred_lft forever
[root@node3 ~]# ip route show
default via 192.168.243.2 dev ens37 proto dhcp metric 101
172.16.100.0/24 dev ens33 proto kernel scope link src 172.16.100.69 metric 102
192.168.243.0/24 dev ens37 proto kernel scope link src 192.168.243.134 metric 101
[root@node3 ~]# crontab -l
*/5 * * * * /usr/sbin/ntpdate ntp1.aliyun.com &> /dev/null
[root@node3 ~]# vim /etc/hosts
172.16.100.67 node1.smoke.com node1 master
172.16.100.68 node2.smoke.com node2
172.16.100.69 node3.smoke.com node3
172.16.100.70 node4.smoke.com node4 node4：
[root@node4 ~]# hostname
node4.smoke.com
[root@node4 ~]# ip addr show
1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:db:3c:9e brd ff:ff:ff:ff:ff:ff
inet 172.16.100.70/24 brd 172.16.100.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::bf5b:a2c5:f22e:7812/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: ens37: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:db:3c:a8 brd ff:ff:ff:ff:ff:ff
inet 192.168.243.133/24 brd 192.168.243.255 scope global noprefixroute dynamic ens37
valid_lft 1349sec preferred_lft 1349sec
inet6 fe80::ad5:80be:e485:ffb5/64 scope link noprefixroute
valid_lft forever preferred_lft forever
[root@node4 ~]# ip route show
default via 192.168.243.2 dev ens37 proto dhcp metric 101
172.16.100.0/24 dev ens33 proto kernel scope link src 172.16.100.70 metric 100
192.168.243.0/24 dev ens37 proto kernel scope link src 192.168.243.133 metric 101
[root@node4 ~]# crontab -l
*/5 * * * * /usr/sbin/ntpdate ntp1.aliyun.com &> /dev/null
[root@node4 ~]# vim /etc/hosts
172.16.100.67 node1.smoke.com node1 master
172.16.100.68 node2.smoke.com node2
172.16.100.69 node3.smoke.com node3
172.16.100.70 node4.smoke.com node4 node1：
[root@node1 ~]# yum -y install java
[root@node1 ~]# vim /etc/profile.d/java.sh
export JAVA_HOME=/usr
[root@node1 ~]# yum -y install java-1.8.0-openjdk-devel
[root@node1 ~]# java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-b04)
OpenJDK 64-Bit Server VM (build 25.212-b04, mixed mode)
[root@node1 ~]# groupadd hadoop
[root@node1 ~]# useradd -g hadoop hadoop
[root@node1 ~]# echo 'smoke520' | passwd --stdin hadoop
[root@node1 ~]# su - hadoop
[hadoop@node1 ~]$ ssh-keygen -t rsa -P ''
[hadoop@node1 ~]$ for i in 2 3 4; do ssh-copy-id -i .ssh/id_rsa.pub hadoop@node${i}; done
[hadoop@node1 ~]$ ssh node2 'date'
2019年 05月 14日 星期二 09:24:58 EDT
[hadoop@node1 ~]$ ssh node3 'date'
2019年 05月 14日 星期二 21:25:08 CST
[hadoop@node1 ~]$ ssh node4 'date'
2019年 05月 14日 星期二 21:25:12 CST
[root@node1 ~]# mkdir -pv /bdapps /data/hadoop/hdfs/{nn,snn,dn}
[root@node1 ~]# chown -R hadoop:hadoop /data/hadoop/hdfs/
[root@node1 ~]# tar xf hadoop-2.6.2.tar.gz -C /bdapps/
[root@node1 ~]# cd /bdapps/
[root@node1 bdapps]# ln -sv hadoop-2.6.2 hadoop
[root@node1 bdapps]# vim /etc/profile.d/hadoop.sh
export HADOOP_PREFIX=/bdapps/hadoop
export PATH=$PATH:${HADOOP_PREFIX}/bin:${HADOOP_PREFIX}/sbin
export HADOOP_COMMON_HOME=${HADOOP_PREFIX}
export HADOOP_HDES_HOME=${HADOOP_PREFIX}
export HADOOP_MAPRED_HOME=${HADOOP_PREFIX}
export HADOOP_YARN_HOME=${HADOOP_PREFIX}
[root@node1 bdapps]# cd hadoop
[root@node1 bdapps]# mkdir logs
[root@node1 bdapps]# chmod g+w logs
[root@node1 bdapps]# chown -R hadoop:hadoop ./*
[root@node1 hadoop]# cd etc/hadoop/
[root@node1 hadoop]# vim core-site.xml
fs.defaultFS
hdfs://master:8020
true
[root@node1 hadoop]# vim yarn-site.xml
yarn.resourcemanager.address
master:8032
yarn.resourcemanager.scheduler.address
master:8030
yarn.resourcemanager.resource-tracker.address
master:8031
yarn.resourcemanager.admin.address
master:8033
yarn.resourcemanager.webapp.address
master:8088
yarn.nodemanager.aux-services
mapreduce_shuffle
yarn.nodemanager.auxservices.mapreduce_shuffle.class
org.apache.hadoop.mapred.ShuffleHandler
yarn.resourcemanager.scheduler.class
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler
[root@node1 hadoop]# vim hdfs-site.xml
dfs.replication
2
dfs.namenode.name.dir
file:///data/hadoop/hdfs/nn
dfs.datanode.data.dir
file:///data/hadoop/hdfs/dn
fs.checkpoint.dir
file:///data/hadoop/hdfs/snn
fs.checkpoint.edits.dir
file:///data/hadoop/hdfs/snn
[root@node1 hadoop]# cp mapred-site.xml.template mapred-site.xml
[root@node1 hadoop]# vim mapred-site.xml
mapreduce.framework.name
yarn
[root@node1 hadoop]# chown hadoop:hadoop mapred-site.xml
[root@node1 hadoop]# vim slaves
node2
node3
node4node2：
[root@node2 ~]# yum -y install java
[root@node2 ~]# vim /etc/profile.d/java.sh
export JAVA_HOME=/usr
[root@node2 ~]# yum -y install java-1.8.0-openjdk-devel
[root@node2 ~]# java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-b04)
OpenJDK 64-Bit Server VM (build 25.212-b04, mixed mode)
[root@node2 ~]# groupadd hadoop
[root@node2 ~]# useradd -g hadoop hadoop
[root@node2 ~]# echo 'smoke520' | passwd --stdin hadoop
[root@node2 ~]# mkdir -pv /bdapps /data/hadoop/hdfs/{nn,snn,dn}
[root@node2 ~]# chown -R hadoop:hadoop /data/hadoop/hdfs/
[root@node2 ~]# tar xf hadoop-2.6.2.tar.gz -C /bdapps/
[root@node2 ~]# cd /bdapps/
[root@node2 bdapps]# ln -sv hadoop-2.6.2 hadoop
[root@node2 bdapps]# vim /etc/profile.d/hadoop.sh
export HADOOP_PREFIX=/bdapps/hadoop
export PATH=$PATH:${HADOOP_PREFIX}/bin:${HADOOP_PREFIX}/sbin
export HADOOP_COMMON_HOME=${HADOOP_PREFIX}
export HADOOP_HDES_HOME=${HADOOP_PREFIX}
export HADOOP_MAPRED_HOME=${HADOOP_PREFIX}
export HADOOP_YARN_HOME=${HADOOP_PREFIX}
[root@node2 bdapps]# cd hadoop
[root@node2 hadoop]# mkdir logs
[root@node2 hadoop]# chmod g+w logs
[root@node2 hadoop]# chown -R hadoop:hadoop ./*
[root@node2 hadoop]# cd etc/hadoop/
[root@node2 hadoop]# vim core-site.xml
fs.defaultFS
hdfs://master:8020
true
[root@node2 hadoop]# vim yarn-site.xml
yarn.resourcemanager.address
master:8032
yarn.resourcemanager.scheduler.address
master:8030
yarn.resourcemanager.resource-tracker.address
master:8031
yarn.resourcemanager.admin.address
master:8033
yarn.resourcemanager.webapp.address
master:8088
yarn.nodemanager.aux-services
mapreduce_shuffle
yarn.nodemanager.auxservices.mapreduce_shuffle.class
org.apache.hadoop.mapred.ShuffleHandler
yarn.resourcemanager.scheduler.class
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler
[root@node2 hadoop]# vim hdfs-site.xml
dfs.replication
2
dfs.namenode.name.dir
file:///data/hadoop/hdfs/nn
dfs.datanode.data.dir
file:///data/hadoop/hdfs/dn
fs.checkpoint.dir
file:///data/hadoop/hdfs/snn
fs.checkpoint.edits.dir
file:///data/hadoop/hdfs/snn
[root@node2 hadoop]# cp mapred-site.xml.template mapred-site.xml
[root@node2 hadoop]# vim mapred-site.xml
mapreduce.framework.name
yarn
[root@node2 hadoop]# chown hadoop:hadoop mapred-site.xmlnode3：
[root@node3 ~]# yum -y install java
[root@node3 ~]# vim /etc/profile.d/java.sh
export JAVA_HOME=/usr
[root@node3 ~]# yum -y install java-1.8.0-openjdk-devel
[root@node3 ~]# java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-b04)
OpenJDK 64-Bit Server VM (build 25.212-b04, mixed mode)
[root@node3 ~]# groupadd hadoop
[root@node3 ~]# useradd -g hadoop hadoop
[root@node3 ~]# echo 'smoke520' | passwd --stdin hadoop
[root@node3 ~]# mkdir -pv /bdapps /data/hadoop/hdfs/{nn,snn,dn}
[root@node3 ~]# chown -R hadoop:hadoop /data/hadoop/hdfs/
[root@node3 ~]# tar xf hadoop-2.6.2.tar.gz -C /bdapps/
[root@node3 ~]# cd /bdapps/
[root@node3 bdapps]# ln -sv hadoop-2.6.2 hadoop
[root@node3 bdapps]# vim /etc/profile.d/hadoop.sh
export HADOOP_PREFIX=/bdapps/hadoop
export PATH=$PATH:${HADOOP_PREFIX}/bin:${HADOOP_PREFIX}/sbin
export HADOOP_COMMON_HOME=${HADOOP_PREFIX}
export HADOOP_HDES_HOME=${HADOOP_PREFIX}
export HADOOP_MAPRED_HOME=${HADOOP_PREFIX}
export HADOOP_YARN_HOME=${HADOOP_PREFIX}
[root@node3 bdapps]# cd hadoop
[root@node3 hadoop]# mkdir logs
[root@node3 hadoop]# chmod g+w logs/
[root@node3 hadoop]# chown -R hadoop.hadoop ./*
[root@node3 hadoop]# cd etc/hadoop/
[root@node3 hadoop]# vim core-site.xml
fs.defaultFS
hdfs://master:8020
true
[root@node3 hadoop]# vim yarn-site.xml
yarn.resourcemanager.address
master:8032
yarn.resourcemanager.scheduler.address
master:8030
yarn.resourcemanager.resource-tracker.address
master:8031
yarn.resourcemanager.admin.address
master:8033
yarn.resourcemanager.webapp.address
master:8088
yarn.nodemanager.aux-services
mapreduce_shuffle
yarn.nodemanager.auxservices.mapreduce_shuffle.class
org.apache.hadoop.mapred.ShuffleHandler
yarn.resourcemanager.scheduler.class
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler
[root@node3 hadoop]# vim hdfs-site.xml
dfs.replication
2
dfs.namenode.name.dir
file:///data/hadoop/hdfs/nn
dfs.datanode.data.dir
file:///data/hadoop/hdfs/dn
fs.checkpoint.dir
file:///data/hadoop/hdfs/snn
fs.checkpoint.edits.dir
file:///data/hadoop/hdfs/snn
[root@node3 hadoop]# cp mapred-site.xml.template mapred-site.xml
[root@node3 hadoop]# vim mapred-site.xml
mapreduce.framework.name
yarn
[root@node3 hadoop]# chown hadoop:hadoop mapred-site.xmlnode4：
[root@node4 ~]# yum -y install java
[root@node4 ~]# vim /etc/profile.d/java.sh
export JAVA_HOME=/usr
[root@node4 ~]# yum -y install java-1.8.0-openjdk-devel
[root@node4 ~]# java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-b04)
OpenJDK 64-Bit Server VM (build 25.212-b04, mixed mode)
[root@node4 ~]# groupadd hadoop
[root@node4 ~]# useradd -g hadoop hadoop
[root@node4 ~]# echo 'smoke520' | passwd --stdin hadoop
[root@node4 ~]# mkdir -pv /bdapps /data/hadoop/hdfs/{nn,snn,dn}
[root@node4 ~]# chown -R hadoop:hadoop /data/hadoop/hdfs/
[root@node4 ~]# tar xf hadoop-2.6.2.tar.gz -C /bdapps/
[root@node4 ~]# cd /bdapps/
[root@node4 bdapps]# ln -sv hadoop-2.6.2 hadoop
[root@node4 bdapps]# vim /etc/profile.d/hadoop.sh
export HADOOP_PREFIX=/bdapps/hadoop
export PATH=$PATH:${HADOOP_PREFIX}/bin:${HADOOP_PREFIX}/sbin
export HADOOP_COMMON_HOME=${HADOOP_PREFIX}
export HADOOP_HDES_HOME=${HADOOP_PREFIX}
export HADOOP_MAPRED_HOME=${HADOOP_PREFIX}
export HADOOP_YARN_HOME=${HADOOP_PREFIX}
[root@node4 bdapps]# cd hadoop
[root@node4 hadoop]# mkdir logs
[root@node4 hadoop]# chmod g+w logs
[root@node4 hadoop]# chown -R hadoop.hadoop ./*
[root@node4 hadoop]# cd etc/hadoop/
[root@node4 hadoop]# vim core-site.xml
fs.defaultFS
hdfs://master:8020
true
[root@node1 hadoop]# vim yarn-site.xml
yarn.resourcemanager.address
master:8032
yarn.resourcemanager.scheduler.address
master:8030
yarn.resourcemanager.resource-tracker.address
master:8031
yarn.resourcemanager.admin.address
master:8033
yarn.resourcemanager.webapp.address
master:8088
yarn.nodemanager.aux-services
mapreduce_shuffle
yarn.nodemanager.auxservices.mapreduce_shuffle.class
org.apache.hadoop.mapred.ShuffleHandler
yarn.resourcemanager.scheduler.class
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler
[root@node4 hadoop]# vim hdfs-site.xml
dfs.replication
2
dfs.namenode.name.dir
file:///data/hadoop/hdfs/nn
dfs.datanode.data.dir
file:///data/hadoop/hdfs/dn
fs.checkpoint.dir
file:///data/hadoop/hdfs/snn
fs.checkpoint.edits.dir
file:///data/hadoop/hdfs/snn
[root@node4 hadoop]# cp mapred-site.xml.template mapred-site.xml
[root@node4 hadoop]# vim mapred-site.xml
mapreduce.framework.name
yarn
[root@node4 hadoop]# chown hadoop:hadoop mapred-site.xmlnode1：
[root@node1 hadoop]# su - hadoop
[hadoop@node1 ~]$ hdfs namenode -format
[hadoop@node1 ~]$ ls /data/hadoop/hdfs/nn/
current
[hadoop@node1 ~]$ start-dfs.sh
[root@node1 hadoop]# su - hadoop
[hadoop@node1 ~]$ jps
58085 Jps
42956 NameNode
43149 SecondaryNameNodenode2：
[root@node2 hadoop]# su - hadoop
[hadoop@node2 ~]$ jps
44982 Jps
44888 DataNodenode3：
[root@node3 hadoop]# su - hadoop
[hadoop@node3 ~]$ jps
37417 Jps
37325 DataNodenode4：
[root@node4 hadoop]# su - hadoop
[hadoop@node4 ~]$ jps
36688 Jps
36596 DataNodenode1：
[hadoop@node1 ~]$ hdfs dfs -mkdir /test
[hadoop@node1 ~]$ hdfs dfs -put /etc/fstab /test/fstab
[hadoop@node1 ~]$ hdfs dfs -ls /test
Found 1 items
-rw-r--r-- 2 hadoop supergroup 541 2019-05-18 20:10 /test/fstab
[hadoop@node1 ~]$ hdfs dfs -lsr /test
lsr: DEPRECATED: Please use 'ls -R' instead.
-rw-r--r-- 2 hadoop supergroup 541 2019-05-18 20:10 /test/fstab
[hadoop@node1 ~]$ hdfs dfs -cat /test/fstab
#
# /etc/fstab
# Created by anaconda on Sat May 4 06:14:49 2019
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos-root / xfs defaults 0 0
UUID=6f08f050-07b8-4179-81af-5c134cc98879 /boot xfs defaults 0 0
/dev/mapper/centos-home /home xfs defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0node2：
[hadoop@node2 ~]$ ls /data/hadoop/hdfs/dn/current/
BP-1149991452-172.16.100.67-1558017374316 VERSION
[hadoop@node2 ~]$ ls /data/hadoop/hdfs/dn/current/BP-1149991452-172.16.100.67-1558017374316/current/finalized/subdir0/subdir0/
blk_1073741825 blk_1073741825_1001.meta
[hadoop@node2 ~]$ cat /data/hadoop/hdfs/dn/current/BP-1149991452-172.16.100.67-1558017374316/current/finalized/subdir0/subdir0/blk_1073741825
#
# /etc/fstab
# Created by anaconda on Sat May 4 06:14:49 2019
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos-root / xfs defaults 0 0
UUID=6f08f050-07b8-4179-81af-5c134cc98879 /boot xfs defaults 0 0
/dev/mapper/centos-home /home xfs defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0node3：
[hadoop@node3 ~]$ cat /data/hadoop/hdfs/dn/current/BP-1149991452-172.16.100.67-1558017374316/current/finalized/subdir0/subdir0/blk_1073741825
#
# /etc/fstab
# Created by anaconda on Sat May 4 06:14:49 2019
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos-root / xfs defaults 0 0
UUID=6f08f050-07b8-4179-81af-5c134cc98879 /boot xfs defaults 0 0
/dev/mapper/centos-home /home xfs defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0node1：
[hadoop@node1 ~]$ start-yarn.sh
[hadoop@node1 ~]$ jps
59696 Jps
59554 ResourceManager
59114 NameNode
59308 SecondaryNameNodenode2：
[hadoop@node2 ~]$ jps
55686 Jps
55577 NodeManager
55455 DataNodenode3：
[hadoop@node3 ~]$ jps
47923 DataNode
48155 Jps
48029 NodeManagernode4：
[hadoop@node4 ~]$ jps
DataNode
NodeManager
Jpsnode1：
[hadoop@node1 ~]$ exit
[root@node1 hadoop]# ss -tnl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:50090 *:*
LISTEN 0 128 172.16.100.67:8020 *:*
LISTEN 0 128 *:50070 *:*
LISTEN 0 128 *:22 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 128 ::ffff:172.16.100.67:8030 :::*
LISTEN 0 128 ::ffff:172.16.100.67:8031 :::*
LISTEN 0 128 ::ffff:172.16.100.67:8032 :::*
LISTEN 0 128 ::ffff:172.16.100.67:8033 :::*
LISTEN 0 128 :::22 :::*
LISTEN 0 128 ::ffff:172.16.100.67:8088 :::*
LISTEN 0 100 ::1:25 :::*通过winodws浏览器访问172.16.100.67:8088；
通过winodws浏览器访问172.16.100.67:50070；
点击Datanodes，查看数据块；
node1：
[root@node1 hadoop]# su - hadoop
[root@node1 hadoop]# hdfs dfs -put /etc/rc.d/init.d/functions /test/
[hadoop@node1 ~]$ hdfs dfs -ls /test
Found 2 items
-rw-r--r-- 2 hadoop supergroup 541 2019-05-18 20:10 /test/fstab
-rw-r--r-- 2 hadoop supergroup 18104 2019-05-18 21:22 /test/functions刷新页面，点击Datanodes，查看数据块；
node1：
[hadoop@node1 ~]$ exit
[root@node1 hadoop]# cd
[root@node1 ~]# mv hadoop-2.6.2.tar.gz /home/hadoop/
[root@node1 ~]# su - hadoop
[hadoop@node1 ~]$ hdfs dfs -put hadoop-2.6.2.tar.gz /test刷新页面，点击Datanodes，查看数据块；
node1：
[hadoop@node1 ~]$ yarn jar /bdapps/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.2.jar
[hadoop@node1 ~]$ yarn jar /bdapps/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.2.jar wordcount /test/fstab /test/functions /test/wc通过winodws浏览器访问172.16.100.67:8088，Apps Subnitted为1；
node1：
[hadoop@node1 ~]$ hdfs dfs -ls /test/wc
Found 2 items
-rw-r--r-- 2 hadoop supergroup 0 2019-05-19 21:00 /test/wc/_SUCCESS
-rw-r--r-- 2 hadoop supergroup 8611 2019-05-19 21:00 /test/wc/part-r-00000
[hadoop@node1 ~]$ hdfs dfs -cat /test/wc/part-r-00000
[hadoop@node1 ~]$ yarn application -list #列出活动作业
19/05/19 21:10:39 INFO client.RMProxy: Connecting to ResourceManager at master/172.16.100.67:8032
Total number of applications (application-types: [] and states: [SUBMITTED, ACCEPTED, RUNNING]):0
Application-Id Application-Name Application-Type User Queue State Final-State Progress Tracking-URL
[hadoop@node1 ~]$ yarn application -list -appStates=all #列出所有作业
19/05/19 21:12:15 INFO client.RMProxy: Connecting to ResourceManager at master/172.16.100.67:8032
Total number of applications (application-types: [] and states: [NEW, NEW_SAVING, SUBMITTED, ACCEPTED, RUNNING, FINISHED, FAILED, KILLED]):1
Application-Id Application-Name Application-Type User Queue State Final-State Progress Tracking-URL
application_1558185185286_0001 word count MAPREDUCE hadoop default FINISHED SUCCEEDED 100% http://node2.smoke.com:19888/jobhistory/job/job_1558185185286_000
[hadoop@node1 ~]$ yarn application -status application_1558185185286_0001 #查看作业报告
19/05/19 21:14:45 INFO client.RMProxy: Connecting to ResourceManager at master/172.16.100.67:8032
Application Report :
Application-Id : application_1558185185286_0001
Application-Name : word count
Application-Type : MAPREDUCE
User : hadoop
Queue : default
Start-Time : 1558270250142
Finish-Time : 1558270803655
Progress : 100%
State : FINISHED
Final-State : SUCCEEDED
Tracking-URL : http://node2.smoke.com:19888/jobhistory/job/job_1558185185286_0001
RPC Port : 44661
AM Host : node2.smoke.com
Aggregate Resource Allocation : 2095249 MB-seconds, 1513 vcore-seconds
Diagnostics :
[hadoop@node1 ~]$ yarn node -list #查看有哪些node；
19/05/19 21:16:36 INFO client.RMProxy: Connecting to ResourceManager at master/172.16.100.67:8032
Total Nodes:3
Node-Id Node-State Node-Http-Address Number-of-Running-Containers
node4.smoke.com:41490 RUNNING node4.smoke.com:8042 0
node2.smoke.com:46826 RUNNING node2.smoke.com:8042 0
node3.smoke.com:33522 RUNNING node3.smoke.com:8042 0
[hadoop@node1 ~]$ yarn node -status node4.smoke.com:41490 #查看对应节点的状态
19/05/19 21:34:44 INFO client.RMProxy: Connecting to ResourceManager at master/172.16.100.67:8032
Node Report :
Node-Id : node4.smoke.com:41490
Rack : /default-rack
Node-State : RUNNING
Node-Http-Address : node4.smoke.com:8042
Last-Health-Update : 星期日 19/五月/19 09:33:08:711CST
Health-Report :
Containers : 0
Memory-Used : 0MB
Memory-Capacity : 8192MB
CPU-Used : 0 vcores
CPU-Capacity : 8 vcores
Node-Labels :
[hadoop@node1 ~]$ yarn logs -applicationId application_1558185185286_0001
19/05/19 21:43:10 INFO client.RMProxy: Connecting to ResourceManager at master/172.16.100.67:8032
/tmp/logs/hadoop/logs/application_1558185185286_0001does not exist.
Log aggregation has not completed or is not enabled.
[hadoop@node1 ~]$ yarn classpath #查看类路径
/bdapps/hadoop/etc/hadoop:/bdapps/hadoop/etc/hadoop:/bdapps/hadoop/etc/hadoop:/bdapps/hadoop/share/hadoop/common/lib/*:/bdapps/hadoop/share/hadoop/common/*:/bdapps/hadoop/share/hadoop/hdfs:/bdapps/hadoop/share/hadoop/hdfs/lib/*:/bdapps/hadoop/share/hadoop/hdfs/*:/bdapps/hadoop/share/hadoop/yarn/lib/*:/bdapps/hadoop/share/hadoop/yarn/*:/bdapps/hadoop/share/hadoop/mapreduce/lib/*:/bdapps/hadoop/share/hadoop/mapreduce/*:/contrib/capacity-scheduler/*.jar:/bdapps/hadoop/share/hadoop/yarn/*:/bdapps/hadoop/share/hadoop/yarn/lib/*
[hadoop@node1 ~]$ yarn rmadmin -refreshNodes
19/05/19 21:49:56 INFO client.RMProxy: Connecting to ResourceManager at master/172.16.100.67:8033