01-09-2007
The constraint is I can not ask sysadmin to do something special for my daemon script abc.ksh. Let me tell you in detail. The abc.ksh is a monitoring script which checks whether database is up and running. It sleeps for 10 mins and wakes up to do these tests and again sleeps. If database is not running then it sends mail to related persons to look into the matter.
During last weekend the unix server is rebooted without my knowledge. Yesterday only I discovered the daemon is not running. So, I need to have a trap in my script which will recognize it is being killed. And subsequently it will send a mail to me informing me that the daemon is not running. I am facing problem with the trap signal. I have given 1, 2, 3, 6, 9, 15, 18, 20, 32 and tested with control C. The script gets killed and sends me a mail. But when I am testing it with kill -9, no mail is being sent.
I want to know --
1. Which option sysadmin use when he/she kills unix daemons before rebooting?
2. What will be trap signal if it is being killed by kill -9 option.
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vxsited(1M) vxsited(1M)
NAME
vxsited - site monitoring daemon
SYNOPSIS
/etc/vx/bin/vxsited [mail_address...]
DESCRIPTION
The vxsited daemon monitors Veritas Volume Manager (VxVM) for disks being attached, and reattaches a detached site if the disks that belong
to that site become accessible.
vxsited analyzes the output of the vxnotify command, and waits for a failed disk to attach. When a disk is attached, vxsited attempts to
online the disk, and tries to reattach the failed site. If a site is successfully reattached, vxsited starts recovery using vxrecover, and
sends mail to root (by default) or to other specified users.
Mail Notification
By default, vxsited sends mail to root with information about the disk status of any attempts to reattach the site. To send mail to other
users, add the user login name to the line that starts vxsited in the startup script, /etc/init.d/vxvm-recover, and reboot the system. For
example, if the line appears as:
nohup vxsited root &
and you want mail also to be sent to user1 and user2, change the line to read:
nohup vxsited root user1 user2 &
Alternatively, kill the vxsite process, and restart it from the command line with the required mail addresses as arguments.
The mail notification has a format that is similar to the following:
Subject : Volume Manager site reattach on host hostname
Reattached site sitename in disk-group diskgroup
Reattachment Procedure
If a disk from a detached site becomes accessible again, vxsited checks whether the relocation daemon, vxrelocd, is running. If vxrelocd
is running, vxsited attempts to reattach the site. The relocation daemon can then try to relocate the failed subdisks using space on the
available disks in the disk group. If the failed objects are successfully relocated, vxrelocd changes the state of the site to RECOVER,
and starts the recovery of volumes at the site. When all the plexes at a site have been recovered, the plexes are put into the ACTIVE
state, and the state of the site is set to ACTIVE.
If vxrelocd is not running, vxsited only reattaches a site when all the disks from that site become accessible. After successfully reat-
taching a site, vxsited changes the site state to ACTIVE, and initiates recovery using vxrecover. When all the plexes from a site have been
recovered, the plexes are put into the ACTIVE state, and the state of the site is set to ACTIVE.
vxsited does not attempt to reattach a site that has been explicitly detached by an administrator. The state OFFLINE is set for sites that
have been detached by using the following command:
vxdg -g dg_name detachsite sitename
Disabling vxsited
If you do not want a site to be recovered automatically, kill the vxsited daemon, and prevent it from restarting. To kill the daemon, run
the following command from the command line, and locate the process table entry for vxsited:
ps -ef
Execute the command:
kill -9 PID
Substitute the process ID of the vxsited process for PID. To prevent vxsited from being restarted, comment out the line that starts
vxsited in the startup script /sbin/init.d/vxvm-recover.
FILES
/sbin/init.d/vxvm-recover The startup file for vxsited.
SEE ALSO
kill(1), mailx(1), ps(1), vxdg(1M), vxrelocd(1M), vxintro(1M), vxnotify(1M), vxrecover(1M)
VxVM 5.0.31.1 24 Mar 2008 vxsited(1M)