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
（4）配置
基础配置，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<qW5o
# Webserver listens on this address and port
http_host=hadoop001
http_port=8888
# Time zone name
time_zone=Asia/Shanghai
# Enable or disable Django debug mode.
django_debug_mode=false
# Enable or disable backtrace for server error
http_500_debug_mode=false
# Enable or disable memory profiling.
## memory_profiler=false
# Server email for internal error messages
## django_server_email=‘hue@localhost.localdomain‘
# Email backend
## django_email_backend=django.core.mail.backends.smtp.EmailBackend
# Webserver runs as this user
server_user=hue
server_group=hue
# This should be the Hue admin and proxy user
## default_user=hue
# This should be the hadoop cluster admin
#default_hdfs_superuser=hadoop
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
配置hue与hadoop集成
[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)
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
（5）启动hue
先启动hive的metastore服务，和hiveserver2服务
nohup hive --service metastore &
noh
up hive --service hiveserver2 &
再启动hue
nohup /home/hadoop/app/hue/build/env/bin/supervisor &
（6）访问hue
http://hadoop004:8888
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
请大佬们多多提意见