| -- |
| -- Licensed to the Apache Software Foundation (ASF) under one or more |
| -- contributor license agreements. See the NOTICE file distributed with |
| -- this work for additional information regarding copyright ownership. |
| -- The ASF licenses this file to You under the Apache License, Version 2.0 |
| -- (the "License"); you may not use this file except in compliance with |
| -- the License. You may obtain a copy of the License at |
| -- |
| -- http://www.apache.org/licenses/LICENSE-2.0 |
| -- |
| -- Unless required by applicable law or agreed to in writing, software |
| -- distributed under the License is distributed on an "AS IS" BASIS, |
| -- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| -- See the License for the specific language governing permissions and |
| -- limitations under the License. |
| -- |
| local core = require("apisix.core") |
| local ipmatcher = require("resty.ipmatcher") |
| local ngx_now = ngx.now |
| local ipairs = ipairs |
| local type = type |
| |
| |
| local _M = {} |
| |
| |
| local function sort_by_key_host(a, b) |
| return a.host < b.host |
| end |
| |
| |
| local function compare_upstream_node(up_conf, new_t) |
| if up_conf == nil then |
| return false |
| end |
| |
| local old_t = up_conf.original_nodes or up_conf.nodes |
| if type(old_t) ~= "table" then |
| return false |
| end |
| |
| if #new_t ~= #old_t then |
| return false |
| end |
| |
| core.table.sort(old_t, sort_by_key_host) |
| core.table.sort(new_t, sort_by_key_host) |
| |
| for i = 1, #new_t do |
| local new_node = new_t[i] |
| local old_node = old_t[i] |
| for _, name in ipairs({"host", "port", "weight", "priority", "metadata"}) do |
| if new_node[name] ~= old_node[name] then |
| return false |
| end |
| end |
| end |
| |
| return true |
| end |
| _M.compare_upstream_node = compare_upstream_node |
| |
| |
| local function parse_domain_for_nodes(nodes) |
| local new_nodes = core.table.new(#nodes, 0) |
| for _, node in ipairs(nodes) do |
| local host = node.host |
| if not ipmatcher.parse_ipv4(host) and |
| not ipmatcher.parse_ipv6(host) then |
| local ip, err = core.resolver.parse_domain(host) |
| if ip then |
| local new_node = core.table.clone(node) |
| new_node.host = ip |
| new_node.domain = host |
| core.table.insert(new_nodes, new_node) |
| end |
| |
| if err then |
| core.log.error("dns resolver domain: ", host, " error: ", err) |
| end |
| else |
| core.table.insert(new_nodes, node) |
| end |
| end |
| return new_nodes |
| end |
| _M.parse_domain_for_nodes = parse_domain_for_nodes |
| |
| |
| function _M.parse_domain_in_up(up) |
| local nodes = up.value.nodes |
| local new_nodes, err = parse_domain_for_nodes(nodes) |
| if not new_nodes then |
| return nil, err |
| end |
| |
| local ok = compare_upstream_node(up.dns_value, new_nodes) |
| if ok then |
| return up |
| end |
| |
| if not up.orig_modifiedIndex then |
| up.orig_modifiedIndex = up.modifiedIndex |
| end |
| up.modifiedIndex = up.orig_modifiedIndex .. "#" .. ngx_now() |
| |
| up.dns_value = core.table.clone(up.value) |
| up.dns_value.nodes = new_nodes |
| core.log.info("resolve upstream which contain domain: ", |
| core.json.delay_encode(up, true)) |
| return up |
| end |
| |
| |
| return _M |