Novell GROUPWISE 8 - WEBACCESS Manuale utente

WebAccess

XII

875

novdocx (en) 22 June 2009

XII

WebAccess

Chapter 53, “Scaling Your WebAccess Installation,” on page 877

Chapter 54, “Configuring WebAccess Components,” on page 891

Chapter 55, “Managing User Access,” on page 935

Chapter 56, “Monitoring WebAccess Operations,” on page 945

Chapter 57, “Using WebAccess Startup Switches,” on page 965

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Scaling Your WebAccess Installation

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Scaling Your WebAccess

Installation

If your GroupWise®system is relatively small (one domain and a few post offices) and all post

offices reside in the same location, a basic installation of GroupWise WebAccess might very well

meet your needs. However, if your GroupWise system is large, spans multiple locations, or requires

failover support, you might need to scale your GroupWise WebAccess installation to better meet the

reliability, performance, and availability needs of your users.

The following sections provide information about the various configurations you can implement and

instructions to help you create the configuration you choose:

Section 53.1, “WebAccess Configurations,” on page 877

Section 53.2, “Installing Additional WebAccess Components,” on page 880

Section 53.3, “Configuring Redirection and Failover Support,” on page 882

For information about creating a basic GroupWise WebAccess installation, see “Installing

GroupWise WebAccess” in the GroupWise 8 Installation Guide.

53.1 WebAccess Configurations

A basic installation of GroupWise WebAccess requires the WebAccess Agent and the WebAccess

Application, as shown in the following diagram. The WebPublisher Application is also required if

you plan to use GroupWise WebPublisher.

Figure 53-1 A Basic Installation of GroupWise WebAccess

Depending on your needs, it might be necessary for you to add additional WebAccess Agents or to

have multiple Web servers running the WebAccess Application and WebPublisher Application.

Section 53.1.1, “Multiple WebAccess Agents,” on page 877

Section 53.1.2, “Multiple WebAccess and WebPublisher Applications,” on page 878

53.1.1 Multiple WebAccess Agents

GroupWise WebAccess is designed to allow one installation of the WebAccess Application and

WebPublisher Application to support multiple WebAccess Agents, as shown in the following

diagram.

Domain

Post Office

WebAccess

Agent

Web Server with

WebAccess and

WebPublisher Applications

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Figure 53-2 Multiple WebAccess Agents

There are various reasons why you might want to add additional WebAccess Agents, including:

Improving reliability: One WebAccess Agent might provide sufficient access and

performance, but you want to protect against downtime that would occur if the WebAccess

Agent became unavailable because of server failure or some other reason. Installing more than

one WebAccess Agent enables you to set up failover support to make your system more

reliable.

Improving performance: The WebAccess Agent is designed to be close to the GroupWise

databases. It requires direct access to a domain database and either direct access to post office

databases or TCP/IP access to the Post Office Agents. For best performance, you should ensure

that the WebAccess Agent is on the same local area network as the domain and post offices it

needs access to. For example, in most cases you would not want a WebAccess Agent in Los

Angeles accessing a post office in London.

Improving availability: The WebAccess Agent has 12 threads assigned to process user

requests, which means that it can process only 12 requests at one time regardless of the number

of users logged in. If necessary, you can increase the number of threads allocated to the

WebAccess Agent, but each thread requires additional server memory. If you reach a point

where WebAccess is unavailable to users because thread utilization is at a peak and all server

memory is being used, you might need to have several WebAccess Agents, installed on

different network servers, servicing your post offices. For information about changing the

number of allocated threads, see Section 54.1, “Configuring the WebAccess Agent,” on

page 892.

53.1.2 Multiple WebAccess and WebPublisher Applications

As with the WebAccess Agent, you can also install the WebAccess Application and WebPublisher

Application to multiple Web servers, as shown in the following diagram.

Web Server with

WebAccess and

WebPublisher Applications

Domain

Post Office

WebAccess

Agent

Domain

Post Office

WebAccess

Agent

Domain

Post Office

WebAccess

Agent

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Figure 53-3 The WebAccess Application and WebPublisher Application Installed to Multiple Web Servers

Some reasons for wanting to use this type of configuration include:

Enabling WebAccess users on an intranet to access GroupWise through an internal Web server

and WebAccess users on the Internet to access GroupWise through an exposed Web server.

Increasing Web server performance by balancing the workload among several Web servers,

especially if you are using the Web server for other purposes in addition to GroupWise

WebAccess.

Hosting WebAccess (the WebAccess Application) on one Web server for your GroupWise

users and WebPublisher (the WebPublisher Application) on another Web server for public

Internet use.

If necessary, you can use multiple WebAccess Agents in this configuration, as shown below.

Figure 53-4 The WebAccess Application on One Web Server, and the WebPublisher Application on Another

Web Server with

WebAccess and

WebPublisher Applications

Domain

Post Office

WebAccess

Agent

Web Server with

WebAccess and

WebPublisher Applications

Web Server with

WebAccess and

WebPublisher Applications

Domain

Post Office

WebAccess

Agent

Domain

Post Office

WebAccess

Agent

Domain

Post Office

WebAccess

Agent

Web Server with

WebAccess and

WebPublisher Applications

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53.2 Installing Additional WebAccess

Components

The following sections assume that you have installed at least one WebAccess Agent and one

WebAccess Application (or WebPublisher Application) and now need to install additional agents or

applications.

Before GroupWise 8, you could successfully run different versions of the WebAccess Agent and the

WebAccess Application together. For example, you could install a new version of the WebAccess

Application on your Web server while still running the previous version of the WebAccess Agent for

the domain.

Starting in GroupWise 8, the recommended update procedure is to update all the WebAccess Agents

in your GroupWise system first, then update all the WebAccess Applications. Long-term use of the

mixed-version configuration is not supported and can result in time zone problems. You must update

both the WebAccess Agent and the WebAccess Application to the same version in order to ensure

proper functioning of the GroupWise 8 WebAccess client.

IMPORTANT: Running a new WebAccess Application with an older WebAccess Agent is no

longer supported.

Section 53.2.1, “Installing Additional Components on NetWare or Windows,” on page 880

Section 53.2.2, “Installing Additional Components on Linux,” on page 881

53.2.1 Installing Additional Components on NetWare or

Windows

“Installing a NetWare or Windows WebAccess Agent” on page 880

“Installing a NetWare or Windows WebAccess or WebPublisher Application” on page 881

For more information, see “NetWare and Windows: Setting Up GroupWise WebAccess” in the

GroupWise 8 Installation Guide.

Installing a NetWare or Windows WebAccess Agent

1Run

setup.exe

at the root of the GroupWise 8 DVD or downloaded GroupWise 8 image. Click

Install Products > Install GroupWise WebAccess.

If you have already copied the GroupWise WebAccess software to a software distribution

directory, run

setup.exe

from the

internet\webacces

directory.

2Click Yes to accept the license agreement and display the Select Components dialog box.

3Deselect all components except the GroupWise WebAccess Agent, then click Next.

4Follow the prompts to create the WebAccess Agent’s gateway directory, install the WebAccess

Agent software, and create the WebAccess Agent’s object in Novell®eDirectoryTM.

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If you are installing to a domain where another WebAccess Agent already exists, you must use

a different directory and object name than the one used for the existing WebAccess Agent.

5When installation is complete, you need to configure your system so that the WebAccess and

WebPublisher Applications know about the WebAccess Agent and can direct the appropriate

user requests to it. For information, see Section 53.3, “Configuring Redirection and Failover

Support,” on page 882.

Installing a NetWare or Windows WebAccess or WebPublisher Application

To install a WebAccess Application or a WebPublisher Application to a Web server:

1Run

setup.exe

at the root of the GroupWise 8 DVD or downloaded GroupWise 8 image. Click

Install Products > Install GroupWise WebAccess.

If you have already copied the Groupwise WebAccess software to a software distribution

directory, run

setup.exe

from the

internet/webacces

directory.

2Click Yes to accept the license agreement and display the Select Components dialog box.

3Deselect all components except the GroupWise WebAccess application and/or the Groupwise

WebPublisher Application, then click Next.

The WebAccess Application and WebPublisher Application must be associated with a

WebAccess Agent. For information on configuring a WebAccess or WebPublisher Application

to connect to other WebAccess Agents, see Section 53.3, “Configuring Redirection and

Failover Support,” on page 882.

4Specify the path for the WebAccess Agent’s gateway directory.

5Follow the prompts to install the files to the Web server. Restart the Web server.

53.2.2 Installing Additional Components on Linux

“Installing a Linux WebAccess Agent” on page 881

“Installing a Linux WebAccess and WebPublisher Application” on page 882

For more information, see “Linux: Setting Up GroupWise WebAccess” in the GroupWise 8

Installation Guide.

Installing a Linux WebAccess Agent

1Make sure that LDAP is running on your eDirectory server and that it is configured to accept

2In a terminal window, become

root

by entering

su -

and the

root

password.

The

su -

command enables the X Window System, which is required for running the GUI

GroupWise Installation program. If you do not want to use the X Window System, you can

install GroupWise components individually, as described in “Installing the GroupWise Agents

Using the Text-Based Installation Program” in “Installing GroupWise Agents” in the

GroupWise 8 Installation Guide.

3Change to the root of the GroupWise 8 DVD or the downloaded GroupWise 8 image.

4Enter

./install

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5Select the language in which you want to run the Installation program and install the

WebAccess software, then click Next.

6In the Installation program, click Install Products > GroupWise WebAccess > Install

WebAccess Agent.

7When the installation is complete, click OK.

8Click Configure WebAccess Agent.

9Follow the prompts to configure the Linux WebAccess Agent.

10 When installation and configuration is complete, you need to configure your GroupWise

system so that the WebAccess and WebPublisher Applications know about this instance of the

WebAccess Agent and can direct the appropriate user requests to it. For instructions, see

Section 53.3, “Configuring Redirection and Failover Support,” on page 882.

Installing a Linux WebAccess and WebPublisher Application

To install a WebAccess Application and a WebPublisher Application to a Web server:

1After installing and configuring the WebAccess Agent, if you want to use existing Apache and

Tomcat installations, click Install GroupWise WebAccess Application.

In addition, a self-signed certificate is generated, enabling users to use WebAccess and

WebPublisher using an SSL connection.

NOTE: The option to install Apache and Tomcat along with the WebAccess Application is not

available if you are installing to Novell Open Enterprise Server Linux because Apache and

Tomcat are already installed and configured correctly in that environment.

2When the installation is complete, click OK.

3Click Configure WebAccess Application.

4Follow the prompts to configure the Linux WebAccess Application.

5When the installation and configuration is complete, start or restart the Web server.

53.3 Configuring Redirection and Failover

Support

Redirection enables the WebAccess Application to direct user requests to specific WebAccess

Agents. For example, you might want WebAccess Agent 1 to process all requests from users on Post

Office 1, and WebAccess Agent 2 to process all requests from users on Post Office 2.

Failover support enables the WebAccess Application to contact a second WebAccess Agent if the

first WebAccess Agent is unavailable. For example, if the WebAccess Application receives a user

request that should be processed by WebAccess Agent 1 but it is unavailable, the WebAccess

Application can route the user request to WebAccess Agent 2 instead.

The following sections provide information to help you successfully configure redirection and

failover support:

Section 53.3.1, “How the WebAccess Application Knows Which WebAccess Agents to Use,”

on page 883

Section 53.3.2, “Synchronizing the Encryption Key,” on page 885

Section 53.3.3, “Specifying a WebAccess Agent in the WebAccess URL,” on page 886

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Section 53.3.4, “Assigning a Default WebAccess Agent to a Post Office,” on page 887

Section 53.3.5, “Assigning a Default WebAccess Agent to a Domain,” on page 888

Section 53.3.6, “Adding WebAccess Agents to the GroupWise Service Provider’s List,” on

page 889

53.3.1 How the WebAccess Application Knows Which

WebAccess Agents to Use

To redirect user requests or to fail over to a second WebAccess Agent, the WebAccess Application

needs to know which WebAccess Agents you want it to use. This might be all of the WebAccess

Agents in your system, or only specific WebAccess Agents.

Each time a user logs in, the WebAccess Application compiles a list, referred to as a redirection/

failover list, of the WebAccess Agents defined in the locations listed below.

The WebAccess URL. The standard URL does not contain a WebAccess Agent, but you can

modify the URL to point to a specific agent.

The user’s Post Office object. You can assign a default WebAccess Agent to the post office to

handle requests from the post office’s users.

The user’s Domain object. You can assign a default WebAccess Agent to the domain to

handle requests from the domain’s users.

The GroupWiseProvider object. This is the service provider used by the WebAccess

Application to connect to WebAccess Agents.

The commgr.cfg file. This file located in the WebAccess Application’s home directory, which

varies by platform.

By default, only the GroupWise Provider object and the

commgr.cfg

file include a WebAccess

Agent definition, as shown in the following table:

Table 53-1 WebAccess Agent Default Locations

NetWare:

sys:\Novell\GroupWise\WebAccess

on the Web server

OES Linux:

/var/opt/novell/groupwise/webaccess

SLES:

/var/opt/novell/groupwise/webaccess

Windows:

c:\Novell\GroupWise\WebAccess

on the Web server

Location WebAccess Agent

WebAccess URL No agent defined

Post office No agent defined

Domain No agent defined

GroupWise service provider Agent 1

commgr.cfg

Agent 1

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If no other WebAccess Agents are defined (as is the case by default), the WebAccess Application

directs all user requests to the WebAccess Agent (Agent 1) listed in the

commgr.cfg

file. This file is

located in the WebAccess Application’s home directory on the Web server. The

commgr.cfg

file

contains the IP address and encryption key for the WebAccess Agent that was associated with the

WebAccess Application during the application’s installation.

If Agent 1 is not available, the user receives an error message and cannot log in.

Redirection/Failover List: Example 1

Assume that the WebAccess Agents are defined as follows:

Using this information, the WebAccess Application would create the following redirection/failover

list:

Because there is no WebAccess Agent defined in the WebAccess URL, the WebAccess Application

redirects the user’s request to the default WebAccess Agent (Agent 1) assigned to the user’s post

office. If Agent 1 is unavailable, the WebAccess Application fails over to the domain’s default

WebAccess Agent (Agent 4). If Agent 4 is unavailable, the WebAccess Application fails over to

Agent 2 and then Agent 3, both of which are defined in the GroupWise service provider’s list.

Redirection/Failover List: Example 2

Assume that the WebAccess Agents are defined as follows:

Location WebAccess Agent

WebAccess URL No agent defined

Post office Agent 1

Domain Agent 4

GroupWise service provider Agent 2 Agent 3

commgr.cfg

Agent 4

List Entry Taken From

Agent 1 Post office

Agent 4 Domain

Agent 2 GroupWise service provider

Agent 3 GroupWise service provider

Location WebAccess Agent

WebAccess URL No agent defined

Post office No agent defined

Domain No agent defined

GroupWise service provider Agent 1 Agent 2 Agent 3

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