Hi all,
We are trying to upgrade our CUPS linux printing service by creating two
print servers. These servers will be identically configured (i.e.
identical printer queue names etc) to try and give us redundancy. We
have had success with an SL 4.4 client running CUPS 1.1.22 but found
problems with an SL 5.1 client running CUPS 1.3.7.
Details:
By creating identical print servers we make use of CUPS' implicit
classes. If we stop the cups service on our "second" print server -
FQDN2 below - (i.e. to simulate failure or re-configuration), we see the
following:
SL 4.4: All printers are still available. (Using remaining print server)
SL 5.1: All printers disappear. (Even though remaining server is active)
The cups log of the SL 5.1 client explicitly states that it is polling
both of the configured print servers.
Has anyone discovered the same problem? Is there an easy work around?
Does an upgrade to SL 5.2 fix this?
More details and cups configuration files below.
Any help appreciated!
Jon
++++
++ SL 4.4 system:
# yum list installed | grep cups
cups.i386 1:1.1.22-0.rc1.9.27.el installed
cups-devel.i386 1:1.1.22-0.rc1.9.27.el installed
cups-libs.i386 1:1.1.22-0.rc1.9.27.el installed
hal-cups-utils.i386 0.5.2-8 installed
libgnomecups.i386 0.1.12-5 installed
(Config file with server names masked.)
# cat /etc/cups/cupsd.conf
# basic cupsd.conf for clients
LogLevel info
# LogLevel debug
HostNameLookups On
Browsing On
BrowseShortNames Yes
BrowseOrder allow,deny
BrowseDeny All
BrowsePoll FQDN1:631
BrowsePoll FQDN2:631
ImplicitClasses Yes
ImplicitAnyClasses Yes
HideImplicitMembers Yes
DefaultAuthType Basic
<Location />
Order Allow, Deny
Allow localhost
</Location>
<Location /admin>
AuthType Basic
Require user @SYSTEM
Order Allow, Deny
Allow localhost
</Location>
BrowseProtocols cups
Listen localhost:631
Listen /var/run/cups/cups.sock
++ SL 5.1 system
# yum list installed | grep cups
cups.i386 1:1.3.7-8.el5_3.6 installed
cups-libs.i386 1:1.3.7-8.el5_3.6 installed
hal-cups-utils.i386 0.6.2-5 installed
libgnomecups.i386 0.2.2-8 installed
(Config file with server names masked.)
# cat /etc/cups/cupsd.conf
# basic cupsd.conf for clients
LogLevel info
# LogLevel debug
HostNameLookups On
Browsing On
BrowseShortNames Yes
BrowseOrder allow,deny
BrowseDeny All
BrowsePoll FQDN1:631
BrowsePoll FQDN2:631
ImplicitClasses Yes
ImplicitAnyClasses Yes
HideImplicitMembers Yes
DefaultAuthType Basic
<Location />
Order Allow, Deny
Allow localhost
</Location>
<Location /admin>
AuthType Basic
Require user @SYSTEM
Order Allow, Deny
Allow localhost
</Location>
Listen localhost:631
Listen /var/run/cups/cups.sock
--
----------------------------
Jon Clark
Scientific Officer
Dept. of Applied Mathematics
University of Sheffield
Sheffield, S3 7RH, UK
----------------------------
