tmp.rb

require 'net_http_unix'
require 'json'

def sample(url)
  req = Net::HTTP::Get.new(url)
  client = NetX::HTTPUnix.new('unix:///var/lib/lxd/unix.socket')
  resp = client.request(req)
  puts resp.body
end

req = Net::HTTP::Post.new("/1.0/containers/admin")
payload = {
  "name" => "test",
}.to_json
req.body = payload
client = NetX::HTTPUnix.new('unix:///var/lib/lxd/unix.socket')
resp = client.request(req)
j =  JSON.parse(resp.body)
puts j["operation"]

sample(j["operation"] + "/wait")