Scripting a better way for a Linux Server Baseline?

JockVSJock · 11-18-2014, 02:41 PM

I'm trying to get a baseline on a number of physical Linux servers before we convert them to virtual machines, that way we know what to allocate.

I fooled around with a few of the command line stuff, mpstat -P ALL, iostat -d -m -h -t, and sar before I decided on a basic script such as the following

Code:

[user@server scripts]$ cat cpu_memory_resources

#!/bin/bash
# 11/18/2014
# Gathering memory, cpu and i/o for this serveri every 15 minutes

echo

printf "%s\n" "##############################################################"
printf "%s `hostname` `date`\n"
printf "%s\n" "##############################################################"

echo

printf "%s\n" "MEMORY STATS IN GIGABYTES"
echo
free -g
echo

printf "%s\n" "ALL CPU STATS"
echo
mpstat -P ALL
echo

printf "%s\n" "IO STATS FOR ALL DISKS IN MEGABYTES"
echo
iostat -d -m -h
echo

The formatting wasn't what we wanted it to be, along with it would be awesome if we could get an average for say on the hour for a 24 hour period. I was thinking maybe use AWK, however I not that familiar with it.

I settled on using the following:

Code:

vmstat -a -S m 8640 3660 > outputfile

Can anyone recommend a better way to caputre this information and clean it up?

thanks

codeguy · 11-19-2014, 08:39 PM

I don't know if its better, but here is what I use.

In /etc/cron.d/sar:

PHP Code:



*/10 * * * *  /usr/local/bin/vcsstat.sh

vcsstat.sh:

PHP Code:



#!/bin/sh 
f=`date +%M` 
fn="/tmp/sa-vcs-$f" 
rm -f $fn 
 
if [[ -e /usr/lib64/sa/sadc ]] 
then 
    app=/usr/lib64/sa/sadc 
else 
    app=/usr/lib/sa/sadc 
fi 
 
$app -S DISK 600 2 $fn 
/usr/bin/sadf -- -bBdqrwW -P ALL  -n DEV,EDEV $fn | /usr/bin/perl /usr/local/bin/addsar.pl 
rm -f $fn

It runs sadc for 10 minutes every 10 minutes (it collects a 10 minute average I guess I should say).
sadf reads the binary format and dumps a text format, which addsar.pl loads into a database.

You can see a quick sample by doing:
/usr/lib/sa/sadc -S DISK 10 2 > /tmp/sa
/usr/bin/sadf -- -bBdqrwW -P ALL -n DEV,EDEV /tmp/sa

JockVSJock · 11-20-2014, 12:22 PM

I'm not familiar with PHP and in the past I've problems trying to get things to compile, at all.

Was hoping I could do something in Bash.