Red Hat APPLICATION STACK 1.2 RELEASE Manual do Utilizador descarregar pdf (Página 25)

MySQL®

4.8. MySQL®

DBD Driver

The MySQL DBD driver has been dual-licensed and the related licensing issues have been resolved.

The resulting apr-util-mysql package is now included in the Red Hat Enterprise Linux 6 software

repositories.

4.9. PostgreSQL

New Release

This release includes an updated version of PostgreSQL. For more information, refer to http://

wiki.postgresql.org/wiki/WhatsNew84.

Upgrading Databases

Before upgrading an existing Red Hat Enterprise Linux 6 system with a PostgreSQL database, it could

be necessary to follow the procedure described here: http://www.postgresql.org/docs/8.4/interactive/

install-upgrading.html. Otherwise the data may be not accessible by the new version of PostgreSQL,

due to changes in the data format.

4.10. Drupal

Drupal has been updated from the 5.x series to 6.x. For details, refer to: http://drupal.org/ Remember

to log in to your site as the admin user, and disable any third-party modules before upgrading this

package. After upgrading the package:

• Copy /etc/drupal/default/settings.php.rpmsave to /etc/drupal/default/

settings.php, and repeat for any additional sites' settings.php files.

• To run the upgrade script, browse to its location using the web interface of your installed host. For

example, http://hostname.example.com/drupal/update.php.

4.11. Squid

Squid has been updated to 3.1, and now provides native IPv6 support. The configuration file /etc/

squid/squid.conf has been significantly shortened; the configuration options for Squid 3.1 have

changed and are not entirely backwards compatible with some older versions. For complete details

on configuration and other changes, please refer to the Squid 3.1 release notes: http://www.squid-

cache.org/Versions/v3/3.1/RELEASENOTES.html.

Squid provides the ability to authenticate users via ncsa_auth and pam_auth helpers. The permissions

of these helpers has changed in Red Hat Enterprise Linux 6. Previous releases enabled the setuid flag

for the ncsa_auth and pam_auth, as elevated privileges were needed to access system files needed

for authentication. Now, in Red Hat Enterprise Linux 6, Squid does not require the setting of the setuid

flag for these helpers. This change has been made because of the security risks present when running

setuid flags. Normal functionality has been maintained without setting these flags.

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Red Hat APPLICATION STACK 1.2 RELEASE Manual do Utilizador Página 25