wklken commented on issue #12436:
URL: https://github.com/apache/apisix/issues/12436#issuecomment-3093188583
apisix/init.lua
```lua
local function parse_domain_in_route(route)
local nodes = route.value.upstream.nodes
core.log.error("parse_domain_in_route: route.value.upstream.nodes=",
core.json.delay_encode(nodes, true)) -- add log here
local new_nodes, err = upstream_util.parse_domain_for_nodes(nodes)
if not new_nodes then
return nil, err
end
local up_conf = route.dns_value and route.dns_value.upstream
local ok = upstream_util.compare_upstream_node(up_conf, new_nodes)
if ok then
return route
end
-- don't modify the modifiedIndex to avoid plugin cache miss because of
DNS resolve result
-- has changed
-- Here we copy the whole route instead of part of it,
-- so that we can avoid going back from route.value to route during
copying.
route.dns_value = core.table.deepcopy(route).value
route.dns_value.upstream.nodes = new_nodes
core.log.info("parse route which contain domain: ",
core.json.delay_encode(route, true))
core.log.error("parse_domain_in_route after parse domain:
route.value.upstream=", core.json.delay_encode(route.value.upstream, true))
-- add log here
core.log.error("parse_domain_in_route after parse domain:
route.value.upstream.nodes=",
core.json.delay_encode(route.value.upstream.nodes, true)) -- add log here
return route
end
```
got the logs
1. here the route.value.upstream.nodes is original nodes(hots is domain)
```
2025/07/20 03:41:08 [error] 519#519: *12037 [lua] init.lua:234:
parse_domain_in_route(): parse_domain_in_route after parse domain:
route.value.upstream.nodes=[{"port":80,"priority":1,"host":"httpbin","weight":100}],
client: 10.1.1.1, server: _, request: "GET /api/apigw/prod/anything HTTP/1.1",
host: "bkapi.example.com"
```
2. here, the new reuqest, the route.value.upstream.nodes is original
nodes(hots is domain); but `after parse domain` it replaced to the parsed nodes
(host is ip)
```
2025/07/20 03:41:45 [error] 519#519: *14537 [lua] init.lua:212:
parse_domain_in_route(): parse_domain_in_route:
route.value.upstream.nodes=[{"port":80,"priority":1,"host":"httpbin","weight":100}],
client: 10.1.1.1, server: _, request: "GET /api/apigw/prod/anything HTTP/1.1",
host: "bkapi.example.com"
2025/07/20 03:41:45 [info] 519#519: *14537 [lua] init.lua:231:
parse_domain_in_route(): parse route which contain domain:
{"has_domain":true,"key":"/bk-gateway-apisix/services/apigw.prod.stage-4","dns_value":{"name":"apigw-prod-anything-get","upstream":{"parent":{"update_count":0,"key":"/bk-gateway-apisix/routes/apigw.prod.2347","createdIndex":5360,"value":{"name":"apigw-prod-anything-get","priority":0,"methods":["GET"],"labels":{"gateway.bk.tencent.com/gateway":"apigw","gateway.bk.tencent.com/stage":"prod"},"id":"apigw.prod.2347","desc":"Returns
anything passed in request
data.","create_time":1752566944,"status":1,"timeout":{"read":30,"connect":30,"send":30},"uris":["/api/apigw/prod/anything","/api/apigw/prod/anything/"],"upstream":"table:
0x7f1c8356f638","update_time":1752566944,"plugins":{"bk-proxy-rewrite":{"subpath_param_name":":ext","use_real_request_uri_unsafe":false,"uri":"/anything","match_subpath":false,"method":"GET"},"bk-resource-context":{"bk_resource_id":2347,"bk_res
ource_name":"anything_get","bk_resource_auth":{"verified_app_required":false,"verified_user_required":false,"resource_perm_required":false,"skip_user_verification":false},"bk_resource_auth_obj":{"verified_app_required":false,"verified_user_required":false,"resource_perm_required":false,"skip_user_verification":false}}},"service_id":"apigw.prod.stage-4"},"modifiedIndex":5360,"orig_modifiedIndex":5360,"has_domain":true,"clean_handlers":{}},"nodes":[{"priority":1,"domain":"httpbin","port":80,"host":"10.100.183.135","weight":100}],"pass_host":"node","type":"roundrobin","scheme":"http","hash_on":"vars","timeout":{"read":30,"connect":30,"send":30}},"desc":"正式环境","id":"apigw.prod.2347","labels":"table:
0x7f1c8356f000","create_time":1752482957,"timeout":"table:
0x7f1c8356f048","update_time":1752566944,"plugins":{"bk-auth-validate":{},"bk-proxy-rewrite":"table:
0x7f1c8356f2d0","bk-delete-cookie":{},"bk-log-context":{},"prometheus":{"prefer_name":false},"bk-real-ip":{},"bk-stage-conte
xt":{"jwt_private_key":"
2025/07/20 03:41:45 [error] 519#519: *14537 [lua] init.lua:233:
parse_domain_in_route(): parse_domain_in_route after parse domain:
route.value.upstream={"parent":{"update_count":0,"key":"/bk-gateway-apisix/routes/apigw.prod.2347","createdIndex":5360,"value":{"name":"apigw-prod-anything-get","priority":0,"methods":["GET"],"labels":{"gateway.bk.tencent.com/gateway":"apigw","gateway.bk.tencent.com/stage":"prod"},"id":"apigw.prod.2347","desc":"Returns
anything passed in request
data.","create_time":1752566944,"status":1,"timeout":{"read":30,"connect":30,"send":30},"uris":["/api/apigw/prod/anything","/api/apigw/prod/anything/"],"upstream":{"parent":"table:
0x7f1c827a2378","nodes":[{"priority":1,"domain":"httpbin","port":80,"host":"10.100.183.135","weight":100}],"pass_host":"node","type":"roundrobin","scheme":"http","hash_on":"vars","timeout":{"read":30,"connect":30,"send":30}},"update_time":1752566944,"plugins":{"bk-proxy-rewrite":{"subpath_param_name":":ext","use_real_request_uri_unsa
fe":false,"uri":"/anything","match_subpath":false,"method":"GET"},"bk-resource-context":{"bk_resource_id":2347,"bk_resource_name":"anything_get","bk_resource_auth":{"verified_app_required":false,"verified_user_required":false,"resource_perm_required":false,"skip_user_verification":false},"bk_resource_auth_obj":{"verified_app_required":false,"verified_user_required":false,"resource_perm_required":false,"skip_user_verification":false}}},"service_id":"apigw.prod.stage-4"},"modifiedIndex":5360,"orig_modifiedIndex":5360,"has_domain":true,"clean_handlers":{}},"nodes":"table:
0x7f1c82da69f0","pass_host":"node","type":"roundrobin","scheme":"http","hash_on":"vars","timeout":"table:
0x7f1c8356f818"}, client: 10.1.1.1, server: _, request: "GET
/api/apigw/prod/anything HTTP/1.1", host: "bkapi.example.com"
```
3. all the following request will use the parsed nodes, and can't detect the
change of the domain ip.
```
2025/07/20 03:41:45 [error] 519#519: *14537 [lua] init.lua:234:
parse_domain_in_route(): parse_domain_in_route after parse domain:
route.value.upstream.nodes=[{"priority":1,"domain":"httpbin","port":80,"host":"10.100.183.135","weight":100}],
client: 10.1.1.1, server: _, request: "GET /api/apigw/prod/anything HTTP/1.1",
host: "bkapi.example.com"
```
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