OpenSSI Logo SourceForge Logo

 home page
 sourceforge page
 mailing lists
 feature list
 Bruce's corner
 related links
 1.2 stable
 1.9 development
 1.2 stable
 1.9 development
work items
 task list
 bug database
 feature requests
 process mgmt hooks
  hide sidebar
Running X Windows with OpenSSI

* Running X on more than one node:

First edit /etc/inittab to add a U to the runlevel for prefdm. This 
tells the SSI-enhanced init to start prefdm on every node:

 # Run xdm in runlevel 5
-x:5:respawn:/etc/X11/prefdm -nodaemon
+x:5U:respawn:/etc/X11/prefdm -nodaemon

Each instance of X creates unix domain sockets in /tmp. To prevent
namespace collisions between them, each node must have its own
/tmp. So we must replace /tmp with a context-dependent symlink
(CDSL). Assuming bash and that node 1 is your initnode:

# mklocalfile /tmp
# rm -rf /cluster/node[1-9]*/tmp/.font-unix
# mkglobalfile /tmp/.font-unix
# rm /cluster/node1/tmp/.font-unix
# mv /cluster/tmp/.font-unix /cluster/node1/tmp
# ln -s /cluster/node1/tmp/.font-unix /cluster/tmp/.
# mklocalfile /var/gdm
# for i in /cluster/node*/var/log ; do mkdir -p $i/gdm ; done

Now each node effectively has its own /tmp and all nodes will use the
X fontserver on node 1 (replace node1 in the above commands if you have 
a different initnode).

It's also a good idea to apply the following patch to /etc/console.perms:

--- /etc/security/console.perms.dist    2003-02-10 21:43:43.000000000
+++ /etc/security/console.perms 2003-11-10 15:02:01.000000000 +0100
@@ -15,7 +15,7 @@
 # man 5 console.perms
 # file classes -- these are regular expressions
-<console>=tty[0-9][0-9]* vc/[0-9][0-9]* :[0-9]\.[0-9] :[0-9]
+<console>=tty[0-9][0-9]* ([0-9]+/)?vc/[0-9][0-9]* :[0-9]\.[0-9] :[0-9]
 <xconsole>=:[0-9]\.[0-9] :[0-9]
 # device classes -- these are shell-style globs

This page last updated on Wed Feb 9 21:36:39 2005 GMT
privacy and legal statement