YARN的HA搭建

YARN的HA搭建

选择192.168.230.10(node1),192.168.230.14(node5)两台主机作为ResourceManager
datanode与nodemanager一定要放在一个机器上

YARN的体系架构

1、配置/opt/modules/hadoop-2.5.1/etc/hadoop/mapred-site.xml:

mapreduce.framework.name
yarn

2、配置/opt/modules/hadoop-2.5.1/etc/hadoop/yarn-site.xml:

yarn.nodemanager.aux-services
mapreduce_shuffle

yarn.resourcemanager.ha.enabled
true



yarn.resourcemanager.cluster-id
cluster1


yarn.resourcemanager.ha.rm-ids
rm1,rm2


yarn.resourcemanager.hostname.rm1
node1


yarn.resourcemanager.hostname.rm2
node5


yarn.resourcemanager.zk-address
node2:2181,node3:2181,node5:2181

3、将在node1主机上配置好的yarn-site.xml，mapred-site.xml文件发送到node2、node3、node5主机上

scp /opt/modules/hadoop-2.5.1/etc/hadoop/yarn-site.xml root@node2:/opt/modules/hadoop-2.5.1/etc/hadoop/
scp /opt/modules/hadoop-2.5.1/etc/hadoop/mapred-site.xml root@node2:/opt/modules/hadoop-2.5.1/etc/hadoop/

scp /opt/modules/hadoop-2.5.1/etc/hadoop/yarn-site.xml root@node3:/opt/modules/hadoop-2.5.1/etc/hadoop/
scp /opt/modules/hadoop-2.5.1/etc/hadoop/mapred-site.xml root@node3:/opt/modules/hadoop-2.5.1/etc/hadoop/

scp /opt/modules/hadoop-2.5.1/etc/hadoop/yarn-site.xml root@node5:/opt/modules/hadoop-2.5.1/etc/hadoop/
scp /opt/modules/hadoop-2.5.1/etc/hadoop/mapred-site.xml root@node5:/opt/modules/hadoop-2.5.1/etc/hadoop/

4、在node1主机上启动yarn

[root@node1 hadoop-2.5.1]# ./sbin/start-yarn.sh

[root@node1 hadoop-2.5.1]# jps

5、启动单节点ResourceManager

[root@node5 hadoop-2.5.1]# ./sbin/yarn-daemon.sh start resourcemanager

[root@node5 hadoop-2.5.1]# jps

6、在浏览器地址栏上访问

http://node1:8088/cluster/nodes

http://node5:8088/cluster/nodes ，页面会直接跳转到node1的页面

6.1、杀死node1主机的resourcemanager进程，http://node1:8088/cluster访问不成功

[root@node1 hadoop-2.5.1]# kill -9 8145

6.2、查看http://node5:8088/cluster发现node5节点的ResourceManager成为Active

6.3、在node1主机重新单节点启动ResourceManager，发现node1的ResourceManager变成了Standby

[root@node1 hadoop-2.5.1]# ./sbin/yarn-daemon.sh start resourcemanager