How to Boot a Cluster Node in Noncluster Mode

You can boot a node so that the node does not participate in the cluster membership, that is, in noncluster mode. Noncluster mode is useful when installing the cluster software or performing certain administrative procedures, such as patching a node.

This procedure provides the long forms of the Sun Cluster commands. Most commands also have short forms. Except for the long and short forms of the command names, the commands are identical. For a list of the commands and their short forms, see Appendix A, Sun Cluster Object-Oriented Commands.

1. Become superuser or assume a role the provides solaris.cluster.admin RBAC authorization on the cluster node to be started in noncluster mode.

2. Shut down the node by using the clnode evacuate and shutdown commands.

   The clnode evacuate command switches over all device groups from the specified node to the next preferred node. The command also switches all resource groups from global or non-global zones on the specified node to the next-preferred global or non-global zones on other nodes.

   # clnode evacuate node # shutdown -g0 -y

3. Verify that the node is showing the ok prompt on a Solaris based system or the Press any key to continue message on a GRUB menu on an x86 based system.

4. Boot the node in noncluster mode.

   • On SPARC based systems, perform the following command:

     phys-schost# boot -xs

   • On x86 based system, perform the following commands:

     phys-schost# shutdown -g -y -i0 Press any key to continue

   1. In the GRUB menu, use the arrow keys to select the appropriate Solaris entry and type e to edit its commands.

      The GRUB menu appears similar to the following:

      GNU GRUB version 0.95 (631K lower / 2095488K upper memory) +-------------------------------------------------------------------------+ | Solaris 10 /sol_10_x86 | | Solaris failsafe | | | +-------------------------------------------------------------------------+ Use the ^ and v keys to select which entry is highlighted. Press enter to boot the selected OS, 'e' to edit the commands before booting, or 'c' for a command-line.

      For more information about GRUB based booting, see Chapter 11, GRUB Based Booting (Tasks), in System Administration Guide: Basic Administration.

   2. In the boot parameters screen, use the arrow keys to select the kernel entry and type e to edit the entry.

      The GRUB boot parameters screen appears similar to the following:

      GNU GRUB version 0.95 (615K lower / 2095552K upper memory) +----------------------------------------------------------------------+ | root (hd0,0,a) | | kernel /platform/i86pc/multiboot | | module /platform/i86pc/boot_archive | +----------------------------------------------------------------------+ Use the ^ and v keys to select which entry is highlighted. Press 'b' to boot, 'e' to edit the selected command in the boot sequence, 'c' for a command-line, 'o' to open a new line after ('O' for before) the selected line, 'd' to remove the selected line, or escape to go back to the main menu.

   3. Add -x to the command to specify that the system boot into noncluster mode.

      [ Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/filename. ESC at any time exits. ] grub edit> kernel /platform/i86pc/multiboot -x

   4. Press the Enter key to accept the change and return to the boot parameters screen.

      The screen displays the edited command.

      GNU GRUB version 0.95 (615K lower / 2095552K upper memory) +----------------------------------------------------------------------+ | root (hd0,0,a) | | kernel /platform/i86pc/multiboot -x | | module /platform/i86pc/boot_archive | +----------------------------------------------------------------------+ Use the ^ and v keys to select which entry is highlighted. Press 'b' to boot, 'e' to edit the selected command in the boot sequence, 'c' for a command-line, 'o' to open a new line after ('O' for before) the selected line, 'd' to remove the selected line, or escape to go back to the main menu.-

   5. Type b to boot the node into noncluster mode.

      ---

      Note –

      This change to the kernel boot parameter command does not persist over the system boot. The next time you reboot the node, it will boot into cluster mode. To boot into noncluster mode instead, perform these steps to again to add the -x option to the kernel boot parameter command.

      ---

Example 3–10 SPARC: Booting a Cluster Node in Noncluster Mode

The following example shows the console output when node phys-schost-1 is shut down and restarted in noncluster mode. The -g0 option sets the grace period to zero, the -y option provides an automatic yes response to the confirmation question, and -i0 invokes run level 0 (zero). Shutdown messages for this node appear on the consoles of other nodes in the cluster.

# clnode evacuate phys-schost-1
# cluster shutdown -g0 -y
Shutdown started.    Wed Mar 10 13:47:32 phys-schost-1 cl_runtime: 

WARNING: CMM monitoring disabled.
phys-schost-1# 
...
rg_name = schost-sa-1 ...
offline node = phys-schost-2 ...
num of node = 0 ...
phys-schost-1# 
INIT: New run level: 0
The system is coming down.  Please wait.
System services are now being stopped.
Print services stopped.
syslogd: going down on signal 15
...
The system is down.
syncing file systems... done
WARNING: node phys-schost-1 is being shut down.
Program terminated

ok boot -x
...
Not booting as part of cluster
...
The system is ready.
phys-schost-1 console login: