zhikaichen123 commented on issue #4874:
URL: https://github.com/apache/apisix/issues/4874#issuecomment-904430469
> When I try to reproduce it via:
>
> ```
> === TEST 13: set route(with upstream)
> --- FIRST
> --- config
> location /t {
> content_by_lua_block {
> local t = require("lib.test_admin").test
> local code, body = t('/apisix/admin/upstreams/1',
> ngx.HTTP_PUT,
> [[{
> "nodes": {
> "yhk.market.alicloudapi.com:1980": 1
> },
> "type": "roundrobin",
> "desc": "new upstream"
> }]]
> )
>
> if code >= 300 then
> ngx.status = code
> ngx.say(body)
> return
> end
>
> local code, body = t('/apisix/admin/routes/1',
> ngx.HTTP_PUT,
> [[{
> "uri": "/server_port",
> "upstream_id": "1"
> }]]
> )
>
> if code >= 300 then
> ngx.status = code
> end
> ngx.say(body)
> }
> }
> --- request
> GET /t
> --- response_body
> passed
> --- no_error_log
> [error]
>
>
>
> === TEST 14: roundrobin
> --- config
> location /t {
> content_by_lua_block {
> local t = require("lib.test_admin").test
> local bodys = {}
> for i = 1, 3 do
> local _, _, body = t('/server_port', ngx.HTTP_GET)
> bodys[i] = body
> end
> table.sort(bodys)
> ngx.say(table.concat(bodys, ", "))
> }
> }
> --- request
> GET /t
> --- response_body
> 1980, 1981, 1981
> --- no_error_log
> [error]
> ```
>
> I got error log `run(): proxy request to 47.110.211.55:1980`, which is
equal to the result got via dig:
>
> ```
> dig yhk.market.alicloudapi.com
>
> ; <<>> DiG 9.16.1-Ubuntu <<>> yhk.market.alicloudapi.com
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57466
> ;; flags: qr rd ad; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
> ;; WARNING: recursion requested but not available
>
> ;; QUESTION SECTION:
> ;yhk.market.alicloudapi.com. IN A
>
> ;; ANSWER SECTION:
> yhk.market.alicloudapi.com. 0 IN CNAME
d6e9851ee5654feb8a3060c085e57bd4-cn-hangzhou.alicloudapi.com.
> d6e9851ee5654feb8a3060c085e57bd4-cn-hangzhou.alicloudapi.com. 0 IN A
47.110.211.55
>
> ;; Query time: 39 msec
> ;; SERVER: 172.24.80.1#53(172.24.80.1)
> ;; WHEN: 二 8月 24 16:05:39 CST 2021
> ;; MSG SIZE rcvd: 220
> ```
>
> No resolver error was found.
谢谢回复！是这样的
直接在ECS上运行，原始域名的跟cname域名都能正常转发； 部署在阿里的k8s集群上，就会报上面的错误
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