SUNScholar/Disaster Recovery/System Monitor/Client

Login and become the root user.

First click here to create a PostgreSQL credentials file.

Then continue.

Install munin as follows:

apt-get install libdbd-pg-perl

apt-get install munin-node

Setup munin to allow the monitoring server to gather statistics as follow:

nano /etc/munin/munin-node.conf

Add the following to the bottom of the file:

allow $ip-address-of-monitoring-server%

Change the following:

host_name %hostname-of-client%

===Example config

# Set this if the client doesn't report the correct hostname when
# telnetting to localhost, port 4949
#
host_name scholar.sun.ac.za

# A list of addresses that are allowed to connect.  This must be a
# regular expression, since Net::Server does not understand CIDR-style
# network notation unless the perl module Net::CIDR is installed.  You
# may repeat the allow line as many times as you'd like

allow ^127\.0\.0\.1$
allow 146.232.128.157

---

NANO Editor Help

CTL+O	= Save the file and then press Enter
CTL+X	= Exit "nano"
CTL+K	= Delete line
CTL+U	= Undelete line
CTL+W	= Search for %%string%%
CTL+\	= Search for %%string%% and replace with $$string$$
CTL+C	= Show line numbers

More info = http://en.wikipedia.org/wiki/Nano_(text_editor)

---

Run the following command to check to update stats available:

munin-node-configure --shell | bash -

Check which stats are available

cd /etc/munin/plugins

ls -l

Add a firewall rule to allow the monitoring server to get the stats:

ufw allow 4949

Thats it. As usual there is a lot of documentation about Munin out there.

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