-----------------------------Grafana离线安装Cloudera Manager插件监控CDH集群-----------------------------

本篇介绍如何安装CM插件并通过Grafana监控CDH集群健康及资源使用情况，该插件直接调用CM里的接口。

Github：https://github.com/foursquare/datasource-plugin-clouderamanager

下载

下载：https://grafana.com/grafana/plugins/foursquare-clouderamanager-datasource/installation

如果访问不了也可以使用附件里我下载好的插件。点击下载

配置Grafana插件路径

Grafana的配置文件在/etc/grafana/grafana.ini，默认插件路径/var/lib/grafana/plugins，如果需要修改默认的插件路径可以编辑此文件，修改下面的参数。

[paths]
# Directory where grafana will automatically scan and look for plugins
;plugins = /var/lib/grafana/plugins

然后将上面下载的zip包解压至该参数路径下:

unzip foursquare-datasource-plugin-clouderamanager-v0.9.2-0-g9ac3d25.zip

重启Grafana

使用下面的命令重启Grafana:

CentOS7:
systemctl restart grafana-server
systemctl enable grafana-server
 
CentOS6:
service grafana-server restart
chkconfig grafana-server on

重新登录Grafana，可以在datasource最下面的others里看到Cloudera Manager已经添加进来了。

配置CM插件数据源

1.在CM中添加只读账户：

使用管理员账户登录CM，点击管理-->用户-->添加用户-->输入账户密码选择'只读'角色

2.配置CM插件数据源

如图配置，输入CM的地址以及上面配置的只读账户:

使用CM插件监控CDH

例1: 查看Impala里正在执行的查询数量监控

SELECT total_impala_num_queries_registered_across_impalads as "总查询" WHERE entityName = "impala" AND category = SERVICE

例2: 组件健康状态

注意这里的Spark的entityName每个集群的都不一样，有些其他的指标如Impala Daemon,hive server2等等也都有各自的entityName，怎么找到它们所对应的entityName请看下面小节。

select  (health_good_rate+health_concerning_rate) * 100 as "Hdfs" where entityName="hdfs:nameservice1"

select  (health_good_rate+health_concerning_rate) * 100 as "Yarn" where entityName="yarn"

select  (health_good_rate+health_concerning_rate) * 100 as "Hive" where entityName="hive"

select  (health_good_rate+health_concerning_rate) * 100 as "Impala" where entityName="impala"

select  (health_good_rate+health_concerning_rate) * 100 as "Hbase" where entityName="hbase"

select  (health_good_rate+health_concerning_rate) * 100 as "Kudu" where entityName="kudu"

select  (health_good_rate+health_concerning_rate) * 100 as "Spark" where entityName="spar40365358-SPARK_YARN_HISTORY_SERVER-84731ef5cb40c534e51774a39"

select  (health_good_rate+health_concerning_rate) * 100 as "ZK" where entityName="zookeeper"