Linux DSN Configuration
This section describes how to set up ODBC connectivity and configure DSNs on several Linux distributions: Debian-based systems, like Ubuntu, and Red Hat Linux platforms, like Red Hat Enterprise Linux (RHEL), CentOS, and Fedora.
Minimum Linux Versions
Here are the minimum supported versions for Red Hat-based and Debian-based systems:
OS | Min. Version |
Ubuntu | 11.04 |
Debian | 7 |
RHEL | 6.9 |
CentOS | 6.9 |
Fedora | 13 |
SUSE | 12.1 |
Installing the Driver Dependencies
Run the following commands as root or with sudo to install the necessary dependencies:
- Debian/Ubuntu:
apt-get install libc6 libstdc++6 zlib1g libgcc1
- RHEL/CentOS/Fedora:
yum install glibc libstdc++ zlib libgcc
Here are the corresponding libraries required by the driver:
Debian/Ubuntu Package | RHEL/CentOS/Fedora Package | File |
libc6 | glibc | linux-vdso.1 |
libc6 | glibc | libm.so.6 |
libc6 | glibc | librt.so.1 |
libc6 | glibc | libdl.so.2 |
libc6 | glibc | libpthread.so.0 |
libc6 | glibc | libc.so.6 |
libc6 | glibc | ld-linux-x86-64.so.2 |
libstdc++6 | libstdc++ | libstdc++.so.6 |
zlib1g | zlib | libz.so.1 |
libgcc1 | libgcc | libgcc_s.so.1 |
Installing the Driver
You can use standard package management systems to install the driver.
On Debian-based systems, like Ubuntu, run the following command with root or sudo:
dpkg -i /path/to/driver/setup/ApacheHBaseODBCDriverforUnix.deb
On systems that support the RPM package format, run the following command with root or sudo:
rpm -ivh /path/to/driver/ApacheHBaseODBCDriverforUnix.rpm
Licensing the Driver
Run the following commands to license the driver. To activate a trial, omit the <key> input.
cd /opt/cdata/cdata-odbc-driver-for-apachehbase/bin/
sudo ./install-license.sh <key>
Connecting through the Driver Manager
The driver manager loads the driver and passes function calls from the application to the driver. You need to register the driver with the driver manager and you define DSNs in the driver manager's configuration files.
The driver installation registers the driver with the unixODBC driver manager and creates a system DSN. The unixODBC driver manager can be used from Python and from many other applications. Your application may embed another driver manager.
Creating the DSN
See Using unixODBC to install unixODBC and configure DSNs. See Using the DataDirect Driver Manager to create a DSN to connect to OBIEE, Informatica, and SAS.
Before You Connect
Different Hadoop distributions contain different interfaces and means of starting and stopping the HBase REST server, along with different default port settings.
In most distributions, the HBase REST server can be started in the foreground by running the following command: hbase rest start -p <port>.
Please consult your Hadoop distribution's documentation for further information regarding the HBase REST server.
Connecting to Apache HBase
The CData ODBC Driver for Apache HBase connects to Apache HBase via the HBase REST (Stargate) server. Set the following to connect to Apache HBase:
- Server: This will typically be the host name or IP address of the server hosting Apache HBase. If there are multiple nodes, use the host name or IP address of the machine running the REST (Stargate) server.
- Port: Set this to the port for the Apache HBase REST (Stargate) server.
Authenticating to Apache HBase
The CData ODBC Driver for Apache HBase supports the following authentication schemes:
- Anonymous
- Basic
- Negotiate (Kerberos)
Anonymous
By default, no authentication (alternatively known as "anonymous" authentication) is used. Set AuthScheme to None to explicitly enforce no authentication.
Basic
To use Basic authentication, set the following:
- AuthScheme: Set this to Basic.
- User: Set this to the Apache HBase user.
- Password: Set this to the Apache HBase password.
Kerberos
To authenticate with Kerberos, set AuthScheme to NEGOTIATE and set the User and Password. Please see Using Kerberos for details on how to authenticate with Kerberos.
Set the Driver Encoding
The ODBC drivers need to specify which encoding to use with the ODBC Driver Manager. By default, the CData ODBC Drivers for Unix are configured to use UTF-16 which is compatible with unixODBC, but other Driver Managers may require alternative encoding.
Alternatively, if you are using the ODBC driver from an application that uses the ANSI ODBC API it may be necessary to set the ANSI code page. For example, to import Japanese characters in an ANSI application, you can specify the code page in the config file '/opt/cdata/cdata-odbc-driver-for-apachehbase/lib/cdata.odbc.apachehbase.ini':
[Driver]
AnsiCodePage = 932