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Full Discussion: AIX monitoring tools for graphical output
Special Forums UNIX and Linux Applications Infrastructure Monitoring AIX monitoring tools for graphical output Post 302472059 by bakunin on Tuesday 16th of November 2010 07:00:54 AM
Old 11-16-2010
Probably your simplest option would be to write a small script.

To monitor the processes use the "ps" command, like in the following script sketch:

Code:
while : ; do
     if [ $(ps -fe | grep "<processname>" | wc -l) -le <minimum_nr_plus_1> ] ; then
          show_error "Not all processes seem to run."
     fi
     sleep <nr_of_seconds>
done

To monitor the memory is more tricky: (almost) all otherwise unused memory is used by the OS for caching purposes, so monitoring "free memory" is completely useless - you get constantly "nearly all memory used" as a result, regardless of how much memory is in fact used by applications.


If you are not interested in exact memory consumption, but only in avoiding paging you could monitor the utilization of the paging space(s) by "lsps -a":

Code:
while : ; do
     if [ $(lsps -s | sed '1d;s/^.*\([0-9][0-9]*\)%.*$/\1/') -gt <threshold_value>] ; then
          show_error "Paging space utilization exceeded."
     sleep <nr_of_seconds>
done

Tomcat is an application and could be monitored like any other process (see above)

Monitoring network connectivity is relatively easy, but with a catch: if the network connection goes down the machine has usually no way of advertising this fact. The best solution is to monitor the system from another host, like in the following sketch:

Code:
while : ; do
     if [ $(ping -c1 <host_to_monitor1>; echo $?) -gt 0 ] ; then
          show_error "Cannot reach <host_to_monitor1>"
     fi
     if [ $(ping -c1 <host_to_monitor2>; echo $?) -gt 0 ] ; then
          show_error "Cannot reach <host_to_monitor2>"
     fi
     [ ...]
     sleep <nr_of_seconds>
done

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
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LEARN ABOUT SUSE

ocf_pacemaker_ping

OCF_PACEMAKER_PING(7)					      Pacemaker Configuration					     OCF_PACEMAKER_PING(7)

NAME

       ocf_pacemaker_ping - node connectivity

SYNOPSIS

       [OCF_RESKEY_pidfile=string] [OCF_RESKEY_dampen=integer] [OCF_RESKEY_name=string] [OCF_RESKEY_multiplier=integer]
       [OCF_RESKEY_host_list=string] [OCF_RESKEY_attempts=integer] [OCF_RESKEY_timeout=integer] [OCF_RESKEY_options=string]
       [OCF_RESKEY_debug=string]

       ping [start | stop | reload | monitor | meta-data | validate-all]

DESCRIPTION

       Every time the monitor action is run, this resource agent records (in the CIB) the current number of ping nodes the host can connect to. It
       is essentially the same as pingd except that it uses the system ping tool to obtain the results.

SUPPORTED PARAMETERS

       OCF_RESKEY_pidfile = string [/var/run//ping-default]
	   PID file

       OCF_RESKEY_dampen = integer [5s]
	   Dampening interval

	   The time to wait (dampening) further changes occur

       OCF_RESKEY_name = string [pingd]
	   Attribute name

	   The name of the attributes to set. This is the name to be used in the constraints.

       OCF_RESKEY_multiplier = integer []
	   Value multiplier

	   The number by which to multiply the number of connected ping nodes by

       OCF_RESKEY_host_list = string []
	   Host list

	   The list of ping nodes to count. Defaults to all configured ping nodes. Rarely needs to be specified.

       OCF_RESKEY_attempts = integer [2]
	   no. of ping attempts

	   Number of ping attempts, per host, before declaring it dead

       OCF_RESKEY_timeout = integer [2]
	   ping timeout in seconds

	   How long, in seconds, to wait before declaring a ping lost

       OCF_RESKEY_options = string []
	   Extra Options

	   A catch all for any other options that need to be passed to ping.

       OCF_RESKEY_debug = string [false]
	   Verbose logging

	   Enables to use default attrd_updater verbose logging on every call.

AUTHOR

       Andrew Beekhof <andrew@beekhof.net>
	   Author.

Pacemaker Configuration 					    07/05/2010						     OCF_PACEMAKER_PING(7)
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