Linux DSN Configuration

This section shows how to connect to Excel Services and execute SQL queries from several Linux distributions: Debian-based systems, like Ubuntu, and Red Hat Linux platforms, like Red Hat Enterprise Linux (RHEL), CentOS, and Fedora.

Using a Driver Manager

Before installing the CData ODBC Driver for Excel Services 2016 on Linux, you will need to install a driver manager. ODBC-compliant applications connect to the driver through a driver manager. After you connect, the driver manager loads the driver and passes function calls from the application to the driver. The driver manager also implements some functions for discovering the registered drivers and DSNs. DSNs can be defined for a specific user or system wide.

Installing unixODBC

Precompiled binaries for the unixODBC driver manager are available for many operating systems.

On Debian-based systems like Ubuntu, you can install unixODBC by running the following command as root or with sudo:

apt-get install unixODBC unixODBC-dev

On Red Hat Enterprise Linux, CentOS, and Fedora, you can install unixODBC with YUM or DNF. For example, run the following command as root or with sudo:

yum install unixODBC unixODBC-devel

If binaries are not available for your operating system, you will need to compile unixODBC yourself. Please refer to the unixODBC website for more information about obtaining binaries or compiling unixODBC on your operating system.

Installing the Driver Dependencies

Minimum Linux Versions

Below are the minimum supported versions for Red Hat-based and Debian-based systems:


OS	Min. Version
Ubuntu	11
Debian	7
RHEL	6
CentOS	6
Fedora	13

Required Libraries and Packages

Below are the libraries required by the driver and their corresponding packages:


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 Packages

You can install the necessary dependencies with the following commands:

Debian/Ubuntu:

apt-get install libc6 libstdc++6 zlib1g libgcc1

RHEL/CentOS/Fedora:
```
yum install glibc libstdc++ zlib libgcc
```

Installing the Driver

You can use standard package management systems to easily and quickly install the driver.

On Debian-based systems, like Ubuntu, you can install the driver by running the following command as root or with sudo:

dpkg -i /path/to/.deb

On systems that support the RPM package format, you can install the driver by running the following command as root or with sudo:

rpm -Uvh /path/to/.rpm

Using the unixODBC Configuration Files

You can determine the location of the configuration files on your system by entering the following command into a terminal:

odbcinst -j

Below is an example of the output of this command:

DRIVERS............: /etc/odbcinst.ini
SYSTEM DATA SOURCES: /etc/odbc.ini
FILE DATA SOURCES..: /etc/ODBCDataSources
USER DATA SOURCES..: /home/myuser/.odbc.ini
SQLULEN Size.......: 8
SQLLEN Size........: 8
SQLSETPOSIROW Size.: 8

The driver installation registers the driver for system-wide use and creates a system DSN with empty values for commonly required properties. Modifying unixODBC's system-wide settings requires elevated permissions; to do so, you can use root or the sudo command.

Configuring a DSN

ODBC data sources are defined in sections in the odbc.ini file.

In addition to the connection properties required to connect to your data source, the Driver property specifies either a driver definition in the odbcinst.ini file or the path to the driver library.

[CData ExcelServices Source]
Driver = CData ODBC Driver for ExcelServices
Description = My Description
MyConnectionProperty1 = My Value
MyConnectionProperty2 = My Value2

You can list the data sources on your system with the following command:

odbcinst  -q -s

Connecting to SharePoint Online

Set SharePointEdition to "SharePoint Online" and set the User and Password for an Azure Active Directory account.

Set the Url to a site collection to query workbooks in all nested sites. Set the Url to a site to query workbooks in that site only.


URL	Example URL
Site	https://teams.contoso.com/teamA or https://teamA.contoso.com
Site Collection	https://teams.contoso.com

Set File to the Excel workbook. This path is relative to the following properties:

Library: The Shared Documents library is used by default. You can use this property to specify another document library in your organization; for example, if you want to connect to OneDrive for Business, set this property to "Documents".
Folder: You can use this property to specify a path to a subfolder in a library. The path is relative to the library name specified in Library.

Connecting to SharePoint On Premises

Set SharePointEdition to "SharePoint OnPremise" and set the Url to your server's name or IP address. Additionally, set SharePointVersion.

To authenticate to SharePoint OnPremise, set AuthScheme to the authentication type and set User and Password, if necessary.

Windows (NTLM)

This is the most common authentication type. As such, the driver is preconfigured to use NTLM as the default; simply set the Windows User and Password to connect.
Kerberos and Kerberos Delegation

To authenticate with Kerberos, set AuthScheme to NEGOTIATE. If needed, provide the User and Password properties. To use Kerberos Delegation, set AuthScheme to KERBEROSDELEGATION.

KerberosKDC, KerberosSPN, and KerberosRealm enable control over the components of Kerberos authentication.
Forms

This allows authentication through a custom authentication method, instead of Active Directory. To use this authentication type, set AuthScheme to FORMS and set the User and Password.

Configuring Driver Definitions

The sections of the odbcinst.ini file map a driver name to the driver library. The section begins with the driver name; the Driver property points to the path to the driver library. The driver library is the .so file located by default in /opt/cdata/excelservices/lib. A Description property can also be provided.

You can list the drivers installed on the system with the following command:

odbcinst -q -d

Testing the Connection

You can use isql, included with unixODBC, to execute SQL queries to Excel Services from the command line. When testing the connection, use the -v flag to output any messages from the driver manager and the driver.

isql -v "CData ExcelServices Source"