help auto starting app on boot Post: 302326197

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Operating Systems HP-UX help auto starting app on boot Post 302326197 by thenomad on Wednesday 17th of June 2009 10:03:40 AM

06-17-2009

Registered User

HP's startup stuff can be a little tricky if you don't know what you are doing. Having said that, it ain't no magic at all.

I am assuming you have a startup/shutdown script for your database right ? If yes, place them in /sbin/init.d directory to be compliant with the standards (otherwise they can be placed anywhere)

Then, decide on which run-level it needs to start, 1 thru 4. The rc script at the startup time, goes thru these run-levels in an ascending order. Run level directories are
$ ll -d /sbin/rc*d
dr-xr-xr-x 2 bin bin 1024 May 6 14:09 /sbin/rc0.d
dr-xr-xr-x 2 bin bin 3072 May 6 2008 /sbin/rc1.d
dr-xr-xr-x 2 bin bin 3072 May 6 14:09 /sbin/rc2.d
dr-xr-xr-x 2 bin bin 1024 Feb 13 2008 /sbin/rc3.d
dr-xr-xr-x 2 bin bin 96 Apr 25 2007 /sbin/rc4.d

rc0.d is reserved for shutting down the system related processes, like syncer, LVM daemon and what-not and unless your database is an integral part of your OS, you should not be placing anything there.

Since these run levels get executed in ascending order, you need to know what prerequisites need to be running prior to launching your database and decide where your startup needs to go. Most layered products like databases and such, usually start at run-level 3

In each run level, you will see symbolic links to start up scripts placed in (generally) /sbin/init.d, named similar to "SxxxScriptName.sh", where the xxx is a numeric sequence number. When the rc script runs, it goes through the numbers, yes, as you guessed, in an ascending order.

In each run level you also will see symbolic links starting with letter K. Those are the "Kill" scripts. Kill scripts are placed one run-level above the level application starts. Highest numbered S script usually complimented by the lowest numbered K script in the next run level above this one.

so, if we say you will start your database as the last app on run level 3, it needs to be killed as first thing on run level 4, so hypothetical commands you will need to run are as follows:

cp /path/to/my/database_start_stop_script /sbin/init.d

ln -s /sbin/rc3.d/S900MyDbStart /sbin/init.d/database_start_stop_script
ln -s /sbin/rc2.d/K100MyDbStop /sbin/init.d/database_start_stop_script

make sure your start/stop script has execute permissions and your links are not destroying existing links (if so, adjust the xxx values by few numbers above or below)

Hope this helps

thenomad

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LEARN ABOUT XFREE86

autofs

AUTOFS(8)						      System Manager's Manual							 AUTOFS(8)

NAME

       /etc/init.d/autofs - Control Script for automounter

SYNOPSIS

       /etc/init.d/autofs start|stop|restart|reload|status

DESCRIPTION

       autofs  control	the  operation of the automount(8) daemons running on the Linux system. Usually autofs is invoked at system boot time with
       the start parameter and at shutdown time with the stop parameter. The autofs script can also manually be invoked by the system  administra-
       tor to shut down, restart or reload the automounters.

OPERATION

       autofs  will  consult a configuration file /etc/auto.master (see auto.master(5)) by default to find mount points on the system. For each of
       those mount points automount(8) will mount and start a thread, with the appropriate parameters, to manage the mount point.

       /etc/init.d/autofs reload will check the current auto.master map against running daemons. It will kill those  daemons  whose  entries  have
       changed and then start daemons for new or changed entries.

       If  a  map is modified then the change will become effective immediately. If the auto.master map is modified then the autofs script must be
       rerun to activate the changes.

       /etc/init.d/autofs status will display the status of, automount(8), running or not.

SEE ALSO

       automount(8), autofs(5), auto.master(5).  autofs_ldap_auth.conf(5)

AUTHOR

       This manual page was written by Christoph Lameter  <chris@waterf.org>,  for  the  Debian  GNU/Linux  system.   Edited  by  H.  Peter  Anvin
       <hpa@transmeta.com>.

								    9 Sep 1997								 AUTOFS(8)