client.lua

require 'compat'.json_escape_forward_slash = 'new'

local log = require 'log'
local json = require 'json'
local netbox = require 'net.box'
local router = netbox.connect('127.0.0.1:4401')

log.info("call_raw: %s", json.encode(router:call('call_raw')))
log.info("call_noraw: %s", json.encode(router:call('call_noraw')))
--[[
call_raw: {"result":[{"status":"ok","message":"pong"},"storage"]}
call_noraw: {"result":{"status":"ok","message":"pong"}}
]]

router.lua

box.cfg{listen=4401,memtx_dir='router',wal_dir='router',vinyl_dir='router'}
box.schema.user.grant('guest', 'super', nil, nil, { if_not_exists = true })

local netbox = require 'net.box'
local storage = netbox.connect('127.0.0.1:3301')

function call_raw()
	local res = storage:call('storage_ping', {}, { return_raw=true })
	return {
		result = res
	}
end

function call_noraw()
	local res = storage:call('storage_ping', {})
	return {
		result = res,
	}
end

storage.lua

box.cfg{listen=3301,memtx_dir='storage',wal_dir='storage',vinyl_dir='storage'}
box.schema.user.grant('guest', 'super', nil, nil, { if_not_exists = true })

function storage_ping()
	return { status = 'ok', message = 'pong' }, 'storage'
end