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@@ -0,0 +1,83 @@ + +Munin is a performance monitoring system which creates nice RRD graphs and has +a very easy plugin interface. The munin homepage is http://munin.projects.linpro.no/ + +To use this module, follow these directions: + +1. Install the "common" module -- the munin module depends on functions that are + defined and installed via the common module, see README.common for how to do this + +2. You will need storedconfigs enabled in your puppet setup, to do that you need to + add a line to your puppet.conf in your [puppetmasterd] section which says: + + storeconfigs=true + + You may wish to immediately setup a mysql/pgsql database for your storedconfigs, as + the default method uses sqlite, and is not very efficient, to do that you need lines + such as the following below the storeconfigs=true line (adjust as needed): + + dbadapter=mysql + dbserver=localhost + dbuser=puppet + dbpassword=puppetspasswd + +3. Install the "munin" module: + + a. Your modules directory will need all the files included in this repository placed + under a directory called "munin" + + b. add the following line to your modules.pp: + + import "munin" + + (NOTE: if you have followed the directions in README.common then you will have import + "modules.pp" in your site.pp, if you do not have that, then you will need to add the + import line to your site.pp) + + c. you will also need to create the following empty directories: + + mkdir /etc/puppet/modules/munin/files/empty + mkdir /etc/puppet/modules/munin/files/modules_dir + mkdir -p /etc/puppet/modules/munin/files/nodes/modules_dir + mkdir -p /etc/puppet/modules/munin/files/plugins/modules_dir + + d. Add to the top of your site.pp a variable which indicates what IP should be allowed to + connect to your individual munin-nodes (this is typically your main munin host's IP): + + $munin_allow = '192.168.0.1' + + e. In the node definition in your site.pp for your main munin host, add the following: + + include munin::host + + f. On each node that will gather munin statistics, add this line to that node's entry + in site.pp (you may want to also add this to your main munin host): + + include munin::client + + g. If there are particular munin plugins you want to enable or configure, you define them + in the node definition, like follows: + + # Enable monitoring of disk stats in bytes + munin::plugin { df_abs: } + + # Use a non-standard plugin path to use custom plugins + munin::plugin { "spamassassin": + ensure => "spamassassin", + script_path => "/usr/local/share/munin-plugins", + } + + # Use a special config to pass parameters to the plugin + munin::plugin { + [ "apache_accesses", "apache_processes", "apache_volume" ]: + ensure => present, + config => "env.url http://127.0.0.1:80/server-status?auto" + } + + + h. If you have Linux-Vservers configured, you will likely have multiple munin-node processes + competing for the default port 4949, for those nodes, set an alternate port for munin-node + to run on by putting something similar to the following in the node definition: + + $munin_port = 4948 + |