HP StorageWorks Scalable File Share System Installation and Upgrade Guide Version 2.2

Configuring the system after installing or upgrading9–2
9.1 Configuring a mail server
If DNS is not configured on the HP SFS system, or if DNS is configured but the HP SFS system cannot access
the mail servers directly, you have the option of configuring a mail server on your site network to relay email
messages from the HP SFS system to the email addresses specified on email alerts defined in the system.
(For information on managing email alerts, refer to Chapter 6 of the HP StorageWorks Scalable File Share
System User Guide.)
This section describes how to configure a mail server to relay email messages from the HP SFS system.
To configure your mail server, perform the following tasks on the mail server:
1. Add the names of the administration server and the MDS server (for example,
south1.my.domain.com and south2.my.domain.com) to the
/etc/mail/local-host-names file.
2. Make the following changes to the /etc/mail/sendmail.mc file:
a. Comment out the following entry (to comment out an entry, include dnl followed by a space at
the start of the entry):
DAEMON_OPTIONS(‘Port=smtp,Addr=127.0.0.1, Name=MTA’)
b. Comment out the following entry:
EXPOSED_USER(‘root’)dnl
c. If the administration server and the MDS server are not in DNS (typically, they will be), add the
following entries:
FEATURE(‘masquerade_entire_domain’)dnl
FEATURE(‘masquerade_envelope’)dnl
FEATURE(‘allmasquerade’)dnl
MASQUERADE_AS(‘name_of_mail_server’)dnl
MASQUERADE_DOMAIN(‘[ext_ip_of_admin_server]’)dnl
MASQUERADE_DOMAIN(‘[ext_ip_of_mds_server]’)dnl
9.2 Configuring supplementary groups
The HP SFS system software (specifically the MDS service) resolves a user's primary group by using
information supplied by the client node. However, in general, the HP SFS system software cannot resolve
supplementary groups. This is because the servers in the HP SFS system are not part of the user
environment—specifically, the servers are not configured to run NIS or similar subsystems.
TIP: If none of your users has more than two supplementary groups, you do not need to configure a group
server and you can skip this section.
This section describes how to configure your HP SFS system so that supplementary groups can be used. The
section is organized as follows:
• Overview (Section 9.2.1)
• Setting up group servers (Section 9.2.2)
• Configuring group servers and the HP SFS system to support supplementary groups (Section 9.2.3)
• Setting the lustre.groups_ssh_timeout attribute (Section 9.2.4)