crowbar-IPs

#!/usr/bin/ruby
#
# Print an IP -> alias mapping from a Crowbar admin node supportconfig

require 'yaml'
require 'json'
require 'pathname'

def read_IPs(mac_to_alias, jsons)
  addr_to_alias = {}
  jsons.each do |json|
    j = JSON.load(json)
    network_name = j["id"].sub(/_network$/, "")
    j["allocated"].each do |ip, data|
      fqdn = data["machine"]
      hostname = fqdn.sub /\..*/, ''
      host_alias = mac_to_alias[hostname]
      if host_alias
        address = data["address"]
        addr_to_alias[address] = "IP-%s-%s" % [network_name, host_alias]
      end
    end
  end
  addr_to_alias
end

def show_IPs(addr_to_alias)
  puts YAML.dump(addr_to_alias)
end

def main
  if ARGV.size != 1
    abort "Usage: #$0 MACS-YAML"
  end

  macs_file = ARGV.shift
  mac_to_alias = YAML.load_file(macs_file)

  jsons = Pathname.glob("./rootfs/var/log/crowbar/chef-export/databag/crowbar/*_network.json")
  addr_to_alias = read_IPs(mac_to_alias, jsons)
  show_IPs(addr_to_alias)
end

main