1. License

GPL. You can add/edit/delete script to fit your need. Please do share your edit to enhance the script.

2. Functions

Script is created using functions. Every check is based on function, so to perform any check or not is depends on whether you call the function or not. Just make to call function or not in the Main Section of the script and it will run as per your need. Even you can add/edit/delete as per your need to make changes in script.

3. Checks

Following checks are made as per my need.

• Loadavg
• Memory / Swap
• CPU
• Ethernet Speed
• Infiniband
• NFS Mounts
• NIS Server
• MCELog (Machine Check Event, hardware error reporting)

You can create your own checks and add to the script for enhance checking.

4. Script

Here it is

#!/bin/bash
#
# Script: Node Health Script 
# Created By: Sohail Riaz (sohaileo@gmail.com) www.sohailriaz.com
# Created On: 9th April 2013
# Detail: To Check Single Node Health. 
# HowTo Run: chmod +x nodecheck.sh; ./nodecheck.sh
# Checks: loadavg, memory, cpu, ehternet, infiniband, infiniband ipath test, cpu test, nfs mounts, nis, mcelog
# Functions: You can load/unload any function you need to run or not to run.
# License: GPL
#

## LoadAvg Function
loadavg() {
LoadAvg=`uptime | awk -F "load average:" '{print $2}' | cut -f 1 -d,`
echo "LoadAvg = $LoadAvg" >> $Report
}

## Memory Function
memory() {
TOTAL_MEM=`grep "MemTotal:" /proc/meminfo | awk '{msum+=($2/1024)/1024} END {printf "%.0f",msum}'`
FREE_MEM=`grep "MemFree:" /proc/meminfo | awk '{mfree+=($2/1024)/1024} END {printf "%.0f",mfree}'`
TOTAL_SWAP=`grep "SwapTotal:" /proc/meminfo | awk '{ssum+=($2/1024)/1024} END {printf "%.0f",ssum}'`
FREE_SWAP=`grep "SwapFree:" /proc/meminfo | awk '{sfree+=($2/1024)/1024} END {printf "%.0f",sfree}'`

echo "TotalMemory = $TOTAL_MEM GB ($FREE_MEM GB Free)" >> $Report
echo "TotalSwap = $TOTAL_SWAP GB ($FREE_SWAP GB Free)" >> $Report
}

## CPU Function
cpu() {
PROCESSOR=`grep processor /proc/cpuinfo | wc -l`
CPU_MODEL=`grep "model name" /proc/cpuinfo | head -n 1 | awk '{print $7 " " $8 " " $9}'`

echo "Processors = $PROCESSOR" >> $Report
echo "ProcessorModel = $CPU_MODEL" >> $Report
}

## Ethernet Function (eth1 for me, you can edit for yours)
ethernet() {
ETHER_SPEED=`ethtool eth1 | grep "Speed:" | awk '{print $2}'`

echo "EthernetSpeed = $ETHER_SPEED" >> $Report
}

## IB Function
ib() {
IB_STATE=`cat /sys/class/infiniband/*/ports/1/state | awk -F ":" '{print $2}'`
IB_PHYS_STATE=`cat /sys/class/infiniband/*/ports/1/phys_state | awk -F ":" '{print $2}'`
IB_RATE=`cat /sys/class/infiniband/*/ports/1/rate`

echo "IB_STATE = $IB_STATE" >> $Report
echo "IBLink = $IB_PHYS_STATE" >> $Report
echo "IBRate = $IB_RATE" >> $Report
}

## IB Test Function
ibtest() {
IB_TEST=`ipath_pkt_test -B | awk -F ":" '{print $2}'`
echo "IPathTest = $IB_TEST" >> $Report
}

## NFS Mounts Function
nfs() {
NFS_MOUNTS=`mount -t nfs,panfs,gpfs | wc -l`

echo "NFS_MOUNTS = $NFS_MOUNTS" >> $Report
}

## NIS Function
nis() {
NIS_TEST=`ypwhich`

echo "NIS_SERVER = $NIS_TEST" >> $Report
}

## MCELog Test Function
mcelog() {
MCELog=`if [ -s /var/log/mcelog ]; then echo "Check MCELog"; else echo "No MCELog"; fi`

echo "MCE Log = $MCELog" >> $Report
}

### MAIN SCRIPT

## Get Node Name
Hostname=`hostname -s`
touch ./$Hostname-checks.txt
Report=./$Hostname-checks.txt
echo " " > $Report
echo "Node = ${Hostname}" >> $Report
echo "----------------" >> $Report

## Get Cluster Name
Cluster=`echo $Hostname | cut -c1-4`

## Call Function
loadavg
memory
cpu
ethernet
ib
ibtest
nfs
nis
mcelog

## Generate Report
echo " " >> $Report
cat $Report

or press to download.     Download Script

To run the script run following command.

chmod +x nodecheck.sh
./nodecheck.sh

 5. Enhancement

You can add/edit/delete any function inside script to meet your need but do share your edits to let us improve the script for maximum checks.

1) Preparation

Enable EPEL repository using following command.

rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm

2) Install NTFS Drivers.

yum -y install ntfs-3g

The above command will install ntfs-3g package which bring NTFS support to your CentOS 6.3 installation. Just plug in your ntfs usb drives or use mount command to enable ntfs hard drive partitions.

1) Preparation.

After installing from Live image to hard driver, first update your kernel and then install Development Tools group to provide all necessary tools for your system.

yum -y update kernel
yum -y groupinstall "Development Tools"

We will require rpmfusion for driver installation so enable rpmfusion repository for Fedora 18 using following command.

rpm -ivh http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-18.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-18.noarch.rpm

2) Installation.

Install ATI driver using rpmfusion repository.

yum -y install akmod-catalyst

The above command will install akmod-catalyst with all dependencies require for it to run. After this you need to run following command to create new initial ram filesystem with updated ATI beta drivers.

new-kernel-pkg --kernel-args=nomodeset --mkinitrd --dracut --update $(rpm -q --queryformat="%{version}-%{release}.%{arch}\n" kernel | tail -n 1)

Reconfigure xorg using aticonfig to use ATI drivers.

aticonfig --initial -f

you are all set, just reboot and enjoying your new Fedora 18 running ATI Graphics Driver. Dont be amaze by seeing AMD Testing use only at right bottom of your screen. Its a beta driver and soon ATI will update there drivers for Fedora 18

1) Fix

Additionally kernel-header of same install kernel rpm provides this file in /usr/include/linux directory. To fix the issue you need to copy the same required version.h file to /lib/modules/3.7.2-201.fc18.x86_64/build/include/linux location.

First check the file is of the same kernel version.

uname -r
3.7.2-201.fc18.x86_64

rpm -qa | grep `uname -r`
kernel-3.7.2-201.fc18.x86_64
kernel-devel-3.7.2-201.fc18.x86_64
kernel-headers-3.7.2-201.fc18.x86_64

rpm -qf /usr/include/linux/version.h
kernel-headers-3.7.2-201.fc18.x86_64

After confirmation, copy the version.h to /lib/modules/3.7.2-201.fc18.x86_64/build/include/linux location.

cp -v /usr/include/linux/version.h /lib/modules/3.7.2-201.fc18.x86_64/build/include/linux

After fixing my ATI Radeon driver installer starts working without failing for any dependencies. For a note Fedora 18 still dont have official ATI drivers and I end up installing akmod-catalyst driver available in rpmfusion repository.

1) Installation.

You need one command to install shutter because it already available in Fedora repository.

yum -y install shutter

2) Running shutter.

To run shutter either you give a command

shutter

or you can open it from application. After opening you can use it to capture any selection area of your desktop and save as screenshot.

2.1) Taking desktop screenshot.

Click on the Selection Button and then it will fade out everything and let you to select any part of your desktop for screenshot. After taking screenshot it will let you to play with your screenshot and you can edit as per your need. It can give you option to export this image to your computer, ftp account, imageshack account or ubuntu one.

2.2) Taking WebSite ScreenShot.

Let using world icon to take any website screenshot using shutter. To achieve it open shutter from application and then click on the world icon and it will then ask you to put URL of the website to take screenshot.

Explore rest.

A free and open Icon collection. Over 10,000 Unique Icons. Free for anyone to use on you computer, website or any other project. The library is not a theme. Its a centralized source for icons to cover all your needs. The goal is to cover all common apps, operating systems, mimetypes, devices, and country flags.

The icons includes application icons, flags, devices, OS etc, full list can be viewed at http://openiconlibrary.sourceforge.net

You can download them as Icon Package or Webapp Package and used them as per your need.

There goal is to

Offer a consolidated source of icons for people to custimise there desktop, as they wish, without relying of a single theme.

Happy designing/developing.

1) Check Already Installed RPM and Required RPM

Following command will check which rpm version is installed.

rpm -qa | grep php

The next command will show you all available version using yum. Be noted I am using atomic repository for my PHP upgrade and downgrade. But you can do this with any rpm hence yum provide you with lower version of rpm package. How to add atomic repository kindly see my following post

http://www.sohailriaz.com/how-to-update-php-on-servers-centosfedorarhel/

yum list | grep php | grep atomic

2) Install YUM Plugin

Issue following command to install yum-allowdowngrade plugin

yum -y install yum-allowdowngrade

3) Downgrade RPM Install

First you should be sure what rpm’s you are going to downgrade. For my list I will using already install PHP rpm package name with downgrade argument, which let yum to automatically use the lower version to install and remove the current version of PHP.

yum downgrade php-dba php-soap php-ldap php-mysql php-mcrypt php-common php-cli php-gd php-odbc php-xmlrpc php-snmp  php-bcmath php-imap- php-devel php-pdo php php-pgsql php-pgsql php-mbstring php-xml

The above command detect the lower version 5.2.17 at itself and give me option to downgrade the php version to 5.2.17. By giving y to start the installation, it removes the current php version, save the configuration files and install the older version of php 5.2.17. Which was than verified using following commands

rpm -qa | grep php

shows install php rpm with version, additionally you can use php command with version option

php –version

If you have any question please comment.

This can be either library or full package itself. We came to issue of upgrading PHP while it require to upgrade MySQL server. By issueing yum upgrade command stuck with conflict with already i386 version of install. By checking we found out both i386 and x86_64 version of rpm were install of MySQL. There is option available in rpm command to remove both of them. But our requirements is to remove only i386 version of MySQL rpm.

1) Get a List of i386 RPMs for MySQL

If I do only

rpm -qa | grep mysql

mysql-5.0.77-4.el5_5.4
mysql-5.0.77-4.el5_5.4
mysql-server-5.0.77-4.el5_5.4
mysql-server-5.0.77-4.el5_5.4
mysql-devel-5.0.77-4.el5_5.4
mysql-devel-5.0.77-4.el5_5.4

will give me both install of mysql with same name. So I will give it queryformat option to get out only i386 version of MySQL

rpm -qa –queryformat=’%{n}-%{v}-%{r}.%{arch}\n’ | grep ‘\i[3456]86$’ | grep mysql

mysql-5.0.77-4.el5_5.4.i386
mysql-server-5.0.77-4.el5_5.4.i386
mysql-devel-5.0.77-4.el5_5.4.i386

The above command will bring MySQL rpm of i386 version install.

2) Delete the i386 rpm.

Now you can issue individual command to remove the found i386 rpm files.

rpm -e mysql-5.0.77-4.el5_5.4.i386
rpm -e mysql-server-5.0.77-4.el5_5.4.i386
rpm -e mysql-devel-5.0.77-4.el5_5.4.i386

The architecture at the end will cause only i386 version of rpm to delete.

3) Delete all i386 RPM Found.

If you wish you can delete all i386 RPM files found on your x86_64 install of RHEL, Fedora or CentOS. You can use following command to do so.

rpm -qa –queryformat=’%{n}-%{v}-%{r}.%{arch}\n’ | grep ‘\.i[3456]86$’ | xargs rpm -ev

If you have any question please comment.

Video at the end to demonstrate all commands.

1) Installing EPEL Repository

Use following command to install EPEL Repository

cd /usr/src
wget http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-5.noarch.rpm
rpm -ivh epel-release-6-5.noarch.rpm

2) Testing

Use following command to see EPEL Repo get listed.

yum repolist
Plugin “refresh-packagekit” can’t be imported
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
epel/metalink                                            | 6.1 kB     00:00
* base: centos.mirror.lstn.net
* epel: fedora-epel.mirror.lstn.net
* extras: centos.mirror.lstn.net
* updates: mirror.steadfast.net
epel                                                     | 4.0 kB     00:00
epel/primary_db                                          | 4.2 MB     00:00
repo id                repo name                                          status
adobe-linux-x86_64     Adobe Systems Incorporated                             2
base                   CentOS-6 – Base                                    6,294
epel                   Extra Packages for Enterprise Linux 6 – x86_64     7,016
extras                 CentOS-6 – Extras                                      4
updates                CentOS-6 – Updates                                   466
vz-base                vz-base                                                3
vz-updates             vz-updates                                             0
repolist: 13,785

You can see above (bold line) about EPEL install and its now part of yum repository list. So now you can download any package listed in EPEL repository. For all list you can use following command.

yum list | grep epel | less

If you have any question please comment.

This can be prevent by using yum plugin yum-versionlock.

1) Install yum-versionlock

yum install yum-versionlock

Above command will install versionlock plugin to work with.

2) Configure yum-versionlock

We have one package installed named gnupg and has update available.

yum update gnupg
Loaded plugins: langpacks, presto, refresh-packagekit, versionlock
Setting up Update Process
Resolving Dependencies
–> Running transaction check
—> Package gnupg.x86_64 0:1.4.11-3.fc15 will be updated
—> Package gnupg.x86_64 0:1.4.12-1.fc16 will be an update
–> Finished Dependency Resolution

Dependencies Resolved

================================================================================
Package        Arch            Version                  Repository        Size
================================================================================
Updating:
gnupg          x86_64          1.4.12-1.fc16            updates          1.3 M

Transaction Summary
================================================================================
Upgrade       1 Package

Total download size: 1.3 M
Is this ok [y/N]: N

Now we will configure yum-versionlock to prevent this package to be update next time. All packages name goes into /etc/yum/pluginconf.d/versionlock.list with format you get from rpm -qa

rpm -qa | grep gnupg
gnupg-1.4.11-3.fc15.x86_64

either write the package name as above in the file or redirect the output.

rpm -qa | grep gnupg >> /etc/yum/pluginconf.d/versionlock.list

cat /etc/yum/pluginconf.d/versionlock.list
gnupg-1.4.11-3.fc15.x86_64

Now again try to update the same package.

yum update gnupg
Loaded plugins: langpacks, presto, refresh-packagekit, versionlock
Setting up Update Process
No Packages marked for Update

You can see it exclude this package for update. If you have any question please comment.