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Showing posts from September, 2015

A puppet manifest with some challenging requirements to do the proper modification in hundreds of servers in one shot!

I needed to install SolarWinds Log and Event Manager in hundreds of Linux servers for my client.

But there were some obstacles to over come as it was not a normal software installation. 

I needed to adept my puppet manifest to declare all my specificrequirements and of course make sure to run installation unattended. 

Requirements
So...the sweet requirements:

1. if the old LEM is installed, uninstall it

2. before uninstall the old version, stop the service

3. if directorycouldn't delete, force delete it

4. download the installer file from the designed server and path

5. since it's unattended installation, download a defined response file as well

6. since the setup file is not able to take the response file with absolute path, execute the installer in a directory where response file has been downloaded

7. for some unknown reasons, installer was starting to execute before response file get downloaded, so I needed to make sure response file is a requirement for installer 

8. and finally, d…

SNMP Configuration Full Monitoring

When you have monitoring system in place for the Linux environment, if you want to make a full use of it, you need to consider using SNMP protocol.

Net-SNMP needs to be installed in your Linux boxes and be configured properly.

Installation: SNMP can be installed via yum command on Redhat/CentOS or "zypper" command in Suse servers:
# yum install net-snmp.x86_64


SNMP MIBs With standard SNMP configuration, you don't get much details monitoring information you would like to have. So SNMP needs to be configured properly to produce all sort of SNMP MIBS.

A standard Linux SNMP config produce following limited MIBs only if we snmpwalk on it:

# snmpwalk -mALL -v1 -cpublic 10.8.230.42

.1.3.6.1.2.1.1.1.0 = STRING: "Linux hostname 2.6.18-371.el5 #1 SMP Thu Sep 5 21:21:44 EDT 2013 x86_64"
.1.3.6.1.2.1.1.2.0 = OID: 1.3.6.1.4.1.8072.3.2.10
.1.3.6.1.2.1.1.3.0 = TIMETICKS: 59756051
.1.3.6.1.2.1.1.4.0 = STRING: "Root <root@localhost> (configure /etc/snmp/snmp.local.conf)&qu…