1.下载ambari-impala-service

VERSION=`hdp-select status hadoop-client | sed 's/hadoop-client - \([0-9]\.[0-9]\).*/\1/'`sudo git clone https://github.com/cas-bigdatalab/ambari-impala-service.git /var/lib/ambari-server/resources/stacks/HDP/$VERSION/services/IMPALA

2./etc/yum.repos.d新建impala.repo

[cloudera-cdh5]# Packages for Cloudera's Distribution for Hadoop, Version 5, on RedHat	or CentOS 6 x86_64name=Cloudera's Distribution for Hadoop, Version 5baseurl=https://archive.cloudera.com/cdh5/redhat/6/x86_64/cdh/5/gpgkey =https://archive.cloudera.com/cdh5/redhat/6/x86_64/cdh/RPM-GPG-KEY-cloudera    gpgcheck = 1

3.重启ambari-server

sudo service ambari-server restart

4.安装impala

Actions-->Add service -->impala，然后一步一步安装

因为要去cloudera官网下载impala的rpm文件，安装过程比较慢，可能会失败，多试几次就好了

5.hdfs增加配置

#HDFS config we need add below config to /etc/hadoop/conf/core-site.xml
             
          
           dfs.client.read.shortcircuit
              
          
           true
          
         
             
          
           dfs.client.read.shortcircuit.skip.checksum
                  
          
           false
          
         
              
          
           dfs.datanode.hdfs-blocks-metadata.enabled
               
          
           true
          
         

we need add below config to /etc/hadoop/conf/hdfs-site.xml
             
          
           dfs.datanode.hdfs-blocks-metadata.enabled
               
          
           true
          
         
              
          
           dfs.block.local-path-access.user
               
          
           impala
          
         
             
          
           dfs.client.file-block-storage-locations.timeout.millis
              
          
           60000
          
         

 6.重启hdfs

7.启动impala

8.把hbase的jar包拷贝到 /usr/lib/impala/lib 并创建软连接

这里注意根据安装的impala的版本对应的cdh的版本选择对应的hbase的版本，否则可能出现版本不兼容的问题

ln -s hbase-annotations-1.2.0-cdh5.11.0.jar hbase-annotations.jarln -s hbase-client-1.2.0-cdh5.11.0.jar hbase-client.jarln -s hbase-common-1.2.0-cdh5.11.0.jar hbase-common.jarln -s hbase-examples-1.2.0-cdh5.11.0.jar hbase-examples.jarln -s hbase-external-blockcache-1.2.0-cdh5.11.0.jar hbase-external-blockcache.jarln -s hbase-hadoop2-compat-1.2.0-cdh5.11.0.jar hbase-hadoop2-compat.jarln -s hbase-hadoop-compat-1.2.0-cdh5.11.0.jar hbase-hadoop-compat.jarln -s hbase-it-1.2.0-cdh5.11.0.jar hbase-it.jarln -s hbase-prefix-tree-1.2.0-cdh5.11.0.jar hbase-prefix-tree.jarln -s hbase-procedure-1.2.0-cdh5.11.0.jar hbase-procedure.jarln -s hbase-protocol-1.2.0-cdh5.11.0.jar hbase-protocol.jarln -s hbase-resource-bundle-1.2.0-cdh5.11.0.jar hbase-resource-bundle.jarln -s hbase-rest-1.2.0-cdh5.11.0.jar hbase-rest.jarln -s hbase-rsgroup-1.2.0-cdh5.11.0.jar hbase-rsgroup.jarln -s hbase-server-1.2.0-cdh5.11.0.jar hbase-server.jarln -s hbase-shell-1.2.0-cdh5.11.0.jar hbase-shell.jarln -s hbase-spark-1.2.0-cdh5.11.0.jar hbase-spark.jarln -s hbase-thrift-1.2.0-cdh5.11.0.jar hbase-thrift.jar

如果没有拷贝hbase的jar到/usr/lib/impala/lib 下则会报错：

光拷贝hbase jar包到/usr/lib/impala/lib 下如果不修改名字的话会识别不到，impala-server启动时会报类似的错：F0510 04:53:11.157616 25119 impalad-main.cc:64] NoClassDefFoundError: org/apache/hadoop/hbase/client/Scan

CAUSED BY: ClassNotFoundException: org.apache.hadoop.hbase.client.Scan