ambari迁移HistoryServer服务

ambari管理界面没有提供move HistoryServer功能，所以需要使用命令进行迁移操作。

操作前提示：如果你对ambari这些操作一点都不熟悉，建议不要进行操作，以免ambari管理界面异常，导致无法管理。
可以先在测试环境操作练习，确认无误后，再进行正式环境操作。

测试环境 Ambari 2.0

一、删除 Delete Mapreduce History Server if server died

1、设置MAPREDUCE2参数
curl -u admin:admin -H "X-Requested-By: ambari" -X PUT -d '{"RequestInfo":{"context":"Stop Service"},"Body":{"ServiceInfo":{"state":"INSTALLED"}}}'

我的操作：
curl -u admin:admin -H "X-Requested-By: ambari" -X PUT -d '{"RequestInfo":{"context":"Stop Service"},"Body":{"ServiceInfo":{"state":"INSTALLED"}}}'

2、设置HISTORYSERVER参数
curl -u admin:admin -H "X-Requested-By: ambari" -X PUT -d '{"RequestInfo":{"context":"Stop Component"},"Body":{"HostRoles":{"state":"INSTALLED"}}}'

我的操作：
curl -u admin:admin -H "X-Requested-By: ambari" -X PUT -d '{"RequestInfo":{"context":"Stop Component"},"Body":{"HostRoles":{"state":"INSTALLED"}}}'


3、删除HISTORYSERVER服务
curl -u admin:admin -H "X-Requested-By: ambari" -X DELETE /components/HISTORYSERVER

我的操作：
curl -u admin:admin -H "X-Requested-By: ambari" -X DELETE /components/HISTORYSERVER


二、增加 Add Mapreduce History Server to New Server

curl -u admin:admin -H "X-Requested-By: ambari" -i -X POST /components/HISTORYSERVER

我的操作：
curl -u admin:admin -H "X-Requested-By: ambari" -i -X POST /components/HISTORYSERVER


curl -u admin:admin -H "X-Requested-By: ambari" -i -X POST -d '{"host_components" : [{"HostRoles":{"component_name":"HISTORYSERVER"}}] }'

我的操作：
curl -u admin:admin -H "X-Requested-By: ambari" -i -X POST -d '{"host_components" : [{"HostRoles":{"component_name":"HISTORYSERVER"}}] }'


curl -u admin:admin -H "X-Requested-By: ambari" -i -X PUT -d '{"ServiceInfo": {"state" : "INSTALLED"}}'

我的操作：
curl -u admin:admin -H "X-Requested-By: ambari" -i -X PUT -d '{"ServiceInfo": {"state" : "INSTALLED"}}'


三、修改配置
Go to Ambari Web > Services > MapReduce2 > Configs > Advanced, and modify mapreduce.jobhistory.address and mapreduce.jobhistory.webapp.address to point to the new History Server host.

我的操作
mapreduce.jobhistory.address testserver4.bj:10020
修改为
mapreduce.jobhistory.address testserver2.bj:10020


mapreduce.jobhistory.webapp.address testserver4.bj:19888
修改后
mapreduce.jobhistory.webapp.address testserver2.bj:19888

四、重启服务
Restart MapReduce2 Service after saving the configuration.

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