kea: server-ids.json

Author: sorah

kea/choose_dhcp_server_id.rb

@@ -1,17 +1,26 @@
 #!/usr/bin/env ruby
 require 'ipaddr'
+require 'json'
 
 dev = IO.popen(%w(ip -o route get 8.8.8.8), 'r', &:read).match(/dev ([^ ]+)/)[1].chomp
 addr = IO.popen([*%w(ip -o address show dev), dev], 'r', &:read).match(/inet ([^ ]+)/)[1].chomp
-net = IPAddr.new(addr)
+#addr = '10.33.137.193'
+this = IPAddr.new(addr)
 
-candidates = ENV.fetch('DHCP_SERVER_IDS', '').split(',')
+#ENV['DHCP_SERVER_IDS'] = '10.33.136.67/21,10.33.152.67/21'
+candidates = ENV['DHCP_SERVER_IDS']&.then { _1.split(',') } || begin
+  JSON.parse(File.read('/server-ids/server-ids.json')).fetch('server_ids')
+end
+warn(JSON.generate(this:, server_id_candidates: candidates))
 
 candidates.each do |candidate|
-  if net.include?(IPAddr.new(candidate))
-    puts candidate
+  warn(JSON.generate(try: {candidate: candidate, this:}))
+  if IPAddr.new(candidate).include?(this)
+    warn(JSON.generate(server_id_chosen: candidate))
+    puts candidate.split(?/)[0]
     exit
   end
 end
 
+warn(JSON.generate(server_id_unchosen: addr, this:))
 puts addr.split(?/)[0]