113.Impala ODBC驱动的安装及配置

113.1 unixODBC依赖包的安装

• 检查是否安装unixODBC包

$ rpm -qa |grep -i unixodbc

• 安装unixODBC依赖包

$ sudo yum -y install unixODBC unixODBC-devel

• 查看unixODBC配置文件路径

$ odbcinst -j

113.2 Impala ODBC驱动安装

• Impala ODBC驱动

$ wget  https://downloads.cloudera.com/connectors/impala_odbc_2.5.41.1029/Linux/EL7/ClouderaImpalaODBC-2.5.41.1029-1.el7.x86_64.rpm

• 安装Impala ODBC的RPM包

$ sudo yum -y localinstall ClouderaImpalaODBC-2.5.41.1029-1.el7.x86_64.rpm 

• Impala的安装目录在/opt/cloudera/impalaodbc

$ tree /opt/cloudera/impalaodbc/

113.3 Impala ODBC的配置

• 设置驱动环境变量，在/etc/profile文件的末尾增加如下配置

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/cloudera/impalaodbc/lib/64

• 立即生效

$ source /etc/profile
$ echo $LD_LIBRARY_PATH

• 配置Impala ODBC驱动，在/etc/odbcinst.ini文件末尾增加如下配置

[ImpalaODBC]
Description=Cloudera ODBC Driver for Impala (64-bit)
Driver=/opt/cloudera/impalaodbc/lib/64/libclouderaimpalaodbc64.so

• 查看是否配置成功

$ odbcinst -q -d

• 配置ODBC DataSource，修改/home/ec2-user/.odbc.ini配置

[ODBC Data Sources]
ImpalaDataSource=Cloudera ODBC Driver for Impala 64-bit
[ImpalaDataSource]
# Description: DSN Description.
# This key is not necessary and is only to give a description of the data source.
Description=Cloudera ODBC Driver for Impala (64-bit) DSN
# Driver: The location where the ODBC driver is installed to.
Driver=/opt/cloudera/impalaodbc/lib/64/libclouderaimpalaodbc64.so
# The DriverUnicodeEncoding setting is only used for SimbaDM
# When set to 1, SimbaDM runs in UTF-16 mode.
# When set to 2, SimbaDM runs in UTF-8 mode.
#DriverUnicodeEncoding=2
# Values for HOST, PORT, KrbFQDN, and KrbServiceName should be set here.
# They can also be specified on the connection string.
HOST=ip-172-31-22-86.ap-southeast-1.compute.internal
PORT=25004
Schema=default
# The authentication mechanism.
# 0 - No authentication (NOSASL)
# 1 - Kerberos authentication (SASL)
# 2 - Username authentication (SASL)
# 3 - Username/password authentication (NOSASL or SASL depending on UseSASL configuration)
AuthMech=1
# Set to 1 to use SASL for authentication.
# Set to 0 to not use SASL.
# When using Kerberos authentication (SASL) or Username authentication (SASL) SASL is always used
# and this configuration is ignored. SASL is always not used for No authentication (NOSASL).
UseSASL=0
# Kerberos related settings.
KrbFQDN=ip-172-31-22-86.ap-southeast-1.compute.internal
KrbRealm=CLOUDERA.COM
KrbServiceName=impala
# Username/password authentication with SASL settings.
UID=
PWD=
# Set to 0 to disable SSL.
# Set to 1 to enable SSL.
SSL=0
CAIssuedCertNamesMismatch=1
TrustedCerts=/opt/cloudera/impalaodbc/lib/64/cacerts.pem
# General settings
TSaslTransportBufSize=1000
RowsFetchedPerBlock=10000
SocketTimeout=0
StringColumnLength=32767
UseNativeQuery=0

• 验证

$ odbcinst -q -s

• Impala ODBC连接验证
  • 访问DataSource

$ isql -v ImpalaDataSource

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