The following code uses Stingray's RESTful API to list all the pools defined for a cluster and for each pool it lists the nodes defined for that pool, including draining and disabled nodes. The code is written in Ruby. This example builds on the previous listpools.rb example. This program does a GET request for the list of pool and then while looping through the list of pools, a GET is done for each pool to retrieve the configuration parameters for that pool.
listpoolnodes.rb
require 'rest_client'
require 'base64'
require 'json'
puts "Pools:\n\n"
url = 'https://stingray.example.com:9070/api/tm/1.0/config/active/pools'
auth = 'Basic ' + Base64.encode64('admin:admin')
begin
# Do the HTTP GET to get the lists of pools
response = RestClient.get(url, {:authorization => auth})
data = JSON.parse(response.body)
pools = data['children']
pools.each do |pool|
poolName = pool['name']
begin
# Do the HTTP GET to get the properties of a pool
response = RestClient.get(url + '/' + URI.escape(poolName), {:authorization => auth})
poolConfig = JSON.parse(response.body)
# Since we are getting the properties for a pool we expect the first element to be 'properties'.
# The value of the key 'properties' will be a hash containing property sections. All the properties
# that this program cares about are in the 'basic' section. 'nodes' is the array of all active or
# draining nodes in this pool. 'draining' the array of all draining nodes in this pool. 'disabled'
# is the array of all disabled nodes in this pool.
nodes = poolConfig['properties']['basic']['nodes']
draining = poolConfig['properties']['basic']['draining']
disabled = poolConfig['properties']['basic']['disabled']
puts "Pool: #{poolName}"
print " Node: "
nodes.each do |node|
print node + ' '
end
puts
if draining.length > 0
print " Draining: "
draining.each do |node|
print node + ' '
end
puts
end
if disabled.length > 0
print " Disabled: "
disabled.each do |node|
print node + ' '
end
puts
end
puts
rescue => e
puts "Error getting pool data: URL=#{url + '/' + URI.escape(poolName)} Error: #{e.message}"
end
end
rescue => e
puts "Error getting pool list: URL=#{url} Error: #{e.message}"
end
Running the example
This code was tested with Ruby 1.9.3 and version 1.6.7 of the rest-client module.
Run the Ruby script as follows:
$ listpoolnodes.rb
Pools:
Pool1
Nodes: 192.168.1.100 192.168.1.101
Draining: 192.168.1.101
Disabled: 192.168.1.102
Pool2
Nodes: 192.168.1.103 192.168.1.104
Read More
