大数据平台搭建 - cdh5.11.1 - hue安装及集成其他组件

一、简介

hue是一个开源的apache hadoop ui系统，由cloudear desktop演化而来，最后cloudera公司将其贡献给了apache基金会的hadoop社区，它基于python框架django实现的。

通过使用hue，我们可以使用可视化的界面在web浏览器上与hadoop集群交互来分析处理数据，例如操作hdfs上的数据，运行MapReduce Job，查看HBase中的数据

二、安装

（1）下载

http://archive.cloudera.com/cdh5/cdh/5/

从这里下载cdh5.11.1的最新版本的hue，3.9.0版本，到本地，并上传到服务器，解压缩到app目录下

（2）必要的组件准备

需要先安装好mysql数据库

需要安装好下面的组件

sudo yum install ant asciidoc cyrus-sasl-devel cyrus-sasl-gssapi gcc gcc-c++ krb5-devel libtidy libxml2-devel libxslt-devel openldap-devel python-devel python-simplejson sqlite-devel gmp-devel -y

 （3）编译

到hue的根目录下，运行

make apps

三、配置

（1）hue基本配置

打开desktop/conf/hue.ini文件

[desktop]

  # Set this to a random string, the longer the better.
  # This is used for secure hashing in the session store.
  secret_key=jFE93j;2[290-eiw.KEiwN2s3['d;/.q[eIW^y#e=+Iei*@Mn

 

（2）配置hue集成hadoop

首先hadoop里设置代理用户，需要配置hadoop的core-site.xml

	  hadoop.proxyuser.hue.hosts
	  *
	
	
	  hadoop.proxyuser.hue.groups
	  *
　

加入这两个属性即可。

然后重启hadoop集群

sbin/stop-dfs.sh

sbin/stop-yarn.sh

sbin/start-dfs.sh

sbin/start-yarn.sh

 

[hadoop]

  # Configuration for HDFS NameNode
  # ------------------------------------------------------------------------
  [[hdfs_clusters]]
    # HA support by using HttpFs

    [[[default]]]
      # Enter the filesystem uri
      fs_defaultfs=hdfs://hadoop001:8020

      # NameNode logical name.
      ## logical_name=

      # Use WebHdfs/HttpFs as the communication mechanism.
      # Domain should be the NameNode or HttpFs host.
      # Default port is 14000 for HttpFs.
      webhdfs_url=http://hadoop001:50070/webhdfs/v1

      # Change this if your HDFS cluster is Kerberos-secured
      ## security_enabled=false

      # Default umask for file and directory creation, specified in an octal value.
      ## umask=022

      # Directory of the Hadoop configuration
      hadoop_conf_dir=/home/hadoop/app/hadoop/etc/hadoop

  # Configuration for YARN (MR2)
  # ------------------------------------------------------------------------
  [[yarn_clusters]]

    [[[default]]]
      # Enter the host on which you are running the ResourceManager
      resourcemanager_host=hadoop002

      # The port where the ResourceManager IPC listens on
      resourcemanager_port=8032

      # Whether to submit jobs to this cluster
      submit_to=True

      # Resource Manager logical name (required for HA)
      ## logical_name=

      # Change this if your YARN cluster is Kerberos-secured
      ## security_enabled=false

      # URL of the ResourceManager API
      resourcemanager_api_url=http://hadoop002:8088

      # URL of the ProxyServer API
      proxy_api_url=http://hadoop002:8088

      # URL of the HistoryServer API
      history_server_api_url=http://hadoop002:19888

      # In secure mode (HTTPS), if SSL certificates from Resource Manager's
      # Rest Server have to be verified against certificate authority
      ## ssl_cert_ca_verify=False

    # HA support by specifying multiple clusters
    # e.g.

    # [[[ha]]]
      # Resource Manager logical name (required for HA)
      ## logical_name=my-rm-name

  # Configuration for MapReduce (MR1)

 

（3）配置hue集成hive

[beeswax]

  # Host where HiveServer2 is running.
  # If Kerberos security is enabled, use fully-qualified domain name (FQDN).
    hive_server_host=hadoop001

  # Port where HiveServer2 Thrift server runs on.
    hive_server_port=10000

  # Hive configuration directory, where hive-site.xml is located
    hive_conf_dir=/home/hadoop/app/hive/conf

  # Timeout in seconds for thrift calls to Hive service
  server_conn_timeout=120

 

 

（4）配置hue集成hbase

###########################################################################
# Settings to configure HBase Browser
###########################################################################

[hbase]
  # Comma-separated list of HBase Thrift servers for clusters in the format of '(name|host:port)'.
  # Use full hostname with security.
  # If using Kerberos we assume GSSAPI SASL, not PLAIN.
  hbase_clusters=(Cluster|hadoop004:9090)

  # HBase configuration directory, where hbase-site.xml is located.
  hbase_conf_dir=/home/hadoop/app/hbase/conf

  # Hard limit of rows or columns per row fetched before truncating.
  ## truncate_limit = 500

  # 'buffered' is the default of the HBase Thrift Server and supports security.
  # 'framed' can be used to chunk up responses,
  # which is useful when used in conjunction with the nonblocking server in Thrift.
  ## thrift_transport=buffered

 

（5）配置hue集成oozie

###########################################################################
# Settings to configure liboozie
###########################################################################

[liboozie]
  # The URL where the Oozie service runs on. This is required in order for
  # users to submit jobs. Empty value disables the config check.
  oozie_url=http://hadoop004:11000/oozie

  # Requires FQDN in oozie_url if enabled
  ## security_enabled=false

  # Location on HDFS where the workflows/coordinator are deployed when submitted.
  #remote_deployement_dir=/user/hue/oozie/deployments

（6）配置hue使用mysql数据库

先配置一个mysql数据库

 [[database]]
    # Database engine is typically one of:
    # postgresql_psycopg2, mysql, sqlite3 or oracle.
    #
    # Note that for sqlite3, 'name', below is a path to the filename. For other backends, it is the database name
    # Note for Oracle, options={"threaded":true} must be set in order to avoid crashes.
    # Note for Oracle, you can use the Oracle Service Name by setting "host=" and "port=" and then "name=:/".
    # Note for MariaDB use the 'mysql' engine.
    engine=mysql
    host=hadoop004
    port=3306
    user=root
    password=123456
	name=hue
    # conn_max_age option to make database connection persistent value in seconds
    # https://docs.djangoproject.com/en/1.9/ref/databases/#persistent-connections
    ## conn_max_age=0
    # Execute this script to produce the database password. This will be used when 'password' is not set.
    ## password_script=/path/script
    ## name=desktop/desktop.db
    ## options={}
    # Database schema, to be used only when public schema is revoked in postgres
    ## schema=public

 

然后去mysql中，建立一个数据库，就是上面的配置文件中配置的数据库oozie

create database hue default character set utf8 default collate utf8_general_ci;

接着，进入hue的build/env/bin目录下，运行：

./hue syncdb

./hue migrate

 

完毕之后，数据库中的表其实默认引擎是MyISAM，需要调整成InnoDB，否则在hue的首页会出现下面的警告信息：

PREFERRED_STORAGE_ENGINE   We recommend MySQL InnoDB engine over MyISAM which does not support transactions.

那么运行下面的语句即可批量调整：

mysql -u root -proot -e \
"SELECT CONCAT('ALTER TABLE ',table_schema,'.',table_name,' engine=InnoDB;') \
FROM information_schema.tables \
WHERE engine = 'MyISAM' AND table_schema = 'hue';" \
| grep "ALTER TABLE hue" > /tmp/set_engine_innodb.ddl

 
mysql -u root -proot < /tmp/set_engine_innodb.ddl

（注意空格上面是一句，空格下面是一句，分两次执行）

　　

 

（7）启动hue

先启动hive的metastore服务，和hiveserver2服务

nohup hive --service metastore &

nohup hive --service hiveserver2 &

 

再启动hue

nohup /home/hadoop/app/hue/build/env/bin/supervisor &

 

（6）访问hue

http://hadoop004:8888

　

四、可能会遇到的问题

Failed to contact an active Resource Manager: YARN RM returned a failed response: { "RemoteException" : { "message" : "User: hue is not allowed to impersonate admin", "exception" : "AuthorizationException", "javaClassName" : "org.apache.hadoop.security.authorize.AuthorizationException" } } (error 403)

这个问题是hadoop的core-site.xml配置的代理的用户和hue配置文件的用户不一致造成的。

比如，hadoop的core-site.xml是这样配置的

hadoop.proxyuser.hue.hosts
*


hadoop.proxyuser.hue.groups
*

代理用户是hue。

而hue里面是这样配置的：

# Webserver runs as this user
#server_user=hue
#server_group=hue

需要把server_user和server_group设置成hue，即可