SUNScholar/Disaster Recovery/System Monitor/Client

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Back to Disaster Recovery System Monitor
First click here to create a PostgreSQL credentials file.

Then continue.

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

sudo ufw allow 4949

Install munin as follows:

Login and become the root user and install the following:

sudo apt-get install munin-node libdbd-pg-perl libxml-simple-perl libcache-cache-perl

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

sudo nano /etc/munin/munin-node.conf

Add the following to the file:

allow $IP-ADDRESS-of-monitoring-server%

Note: At SULIS our monitoring server IP address is:

Change the following:

host_name %hostname-of-client%

See example below.

# Set this if the client doesn't report the correct hostname when
# telnetting to localhost, port 4949

# 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\.15$

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 =

Run the following command to update stats available:

sudo munin-node-configure --shell | bash -

Restart the local Munin daemon

It is necessary to restart the local munin daemon so that the remote server may connect.
sudo service munin-node restart

Check which stats are available

cd /etc/munin/plugins
ls -l

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