Choria Nettest agent

This is an agent that will execute a ping or remote connection test on mcollective hosts

I often find myself logging onto boxes to ping different sites to diagnose local or remote network issues, this means I can now just issue a single command and get results from anywhere I’m running mcollective.

Installation

This module depends on the Net::Ping Ruby gem which requires a C++ compiler to build.

Usage

ICMP ping test:

$ mco nettest ping hostname
Do you really want to perform network tests unfiltered? (y/n): y

 * [ ============================================================> ] 11 / 11

node1.example.net                        time = 0.429
node8.example.net                        time = 0.388
node5.example.net                        time = 0.686
node4.example.net                        time = 1.858
middleware.example.net                   time = 2.697
node7.example.net                        time = 0.637
node0.example.net                        time = 16.455
node9.example.net                        time = 1.974
node6.example.net                        time = 0.415
node3.example.net                        time = 0.389
node2.example.net                        time = 0.4

Summary of RTT:

   Min: 0.388ms  Max: 16.455ms  Average: 2.393ms

Finished processing 11 / 11 hosts in 85.76 ms

TCP connection test to port 8140:

$ mco nettest connect hostname 8140

Validator

The nettest agent supplies an fqdn validator which will validate if a string is a valid uri.

validate :fqdn, :nettest_fqdn

The nettest agent supplies a server address validator which will validate that a given string includes both a valid hostname and port number separated by a colon.

validate :serveraddress, :nettest_server_address

Data Plugin

The nettest agent also supplies a data plugin which uses the nettest agent to check if a connection to a fqdn at a specific port can be made. The data plugin will return 'true' or 'false' and can be used during discovery or any other place where the MCollective discovery language is used.

$ mco rpc rpcutil -S "Nettest('myhost', '8080').connect=true"

Mma Aggregate Plugin

The nettest agent supplies a mma aggregate plugin which will determine the minimum value, maximum value and average value of a set of inputs determinted in a DDL.

summarize do
  aggregate nettest_mma(:rtt, :format => "Min: %.3fms  Max: %.3fms  Average: %.3fms")
end