xntpd starts after reboot only when HACMP services are started ? Post: 302422404

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Operating Systems AIX xntpd starts after reboot only when HACMP services are started ? Post 302422404 by shockneck on Tuesday 18th of May 2010 09:47:31 AM

05-18-2010

Registered User

You did not tell us what your cluster's topology looks like and you think the HA release is 5.4. So let me make some assumptions based on what it should look like when you use IPAT with aliasing which is the default for 5.4.

Your cluster has two physical adapters which are configured during boot with a non routed IP address each. E.g. after node boot your adapters are configured with sth. like 192.168.10.1 and 192.168.20.1 on one node and 192.168.10.2 and 192.168.20.2 on the other. These addresses are just used for cluster communication and the nodes are not reachable via TCP/IP from your production network. Only after a Resource Group is online you have a (Service Label) IP address active and the default route. At least this is the presuppostion HA makes. If you understand this you now know why xntpd becomes active after a RG came online only: HA 5.4 deferrs the start of all services that rely on a working production network.

To avoid the nodes (without an active RG) being not reachable via TCP/IP from production network IBM introduced the Persistent Address. Such an address is configured during node boot as an alias and while it is accessible right from the start it is not part of a resource group. Opposed to an aliased boot address such a Persistent IP may be in the same subnet as the Service IP Label. Because the default route is usually tied to this subnet the node is then always reachable just as any other non-clustered node. With a working TCP/IP environment you could start it from the /etc/rc.tcpip automatically with

Code:

start /usr/sbin/xntpd "$src_running"

and/or manually with

Code:

# startsrc -s xntpd

You may read the HA 5.4 Installation Guide and the HA 5.4 Admin Guide. Then follow up with the sg246769 redbook aka HACMP cookbook.

Last edited by shockneck; 05-18-2010 at 11:30 AM.. Reason: typo

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reboot

reboot(2)							System Calls Manual							 reboot(2)

NAME

       reboot - boot the system

SYNOPSIS

DESCRIPTION

       causes the system to reboot.  howto is a mask of reboot options (see specified as follows:

	      A file system sync is performed (unless
				  is set) and the processor is rebooted from the default device and file.

	      The processor is simply halted.
				  A sync of the file system is performed unless the flag is set.  should be used with caution.

	      On systems with cellular architecture, all cells in the partition are
				  rebooted  in order to reconfigure the stable complex configuration data.  On systems with non-cellular architec-
				  ture, the default is A sync of the file system is performed unless the flag is set.

	      Shut down the system firmware to a "ready to reconfigure" state and do not
				  reboot.  This option can be used only in combination with

	      A sync of the file system is not performed.

       Unless the flag has been specified, reboot(2) unmounts all mounted file systems and marks them clean so that it will not  be  necessary	to
       run fsck(1M) on these file systems when the system reboots.

       Only users with appropriate privileges can reboot a machine.

RETURN VALUE

       If successful, this call never returns.	Otherwise, a -1 is returned and is set to indicate the error.

ERRORS

       fails if this condition is encountered:

	      [EPERM]		  The effective user ID of the caller is not a user with appropriate privileges.

DEPENDENCIES

       The default file and device for is on the current root device.

AUTHOR

       was developed by HP and the University of California, Berkeley.

SEE ALSO

       reboot(1M), privileges(5).

																	 reboot(2)