wklken commented on issue #10093:
URL: https://github.com/apache/apisix/issues/10093#issuecomment-1702146347
I have reproduce @jiangfucheng
just mock dns fail in lua
## apisix config:
1. start apisix with 4 processes
2. change then nginx error log level to `info`
## register route:
1. add a route `/get` with one upstream, one node like `httpbin.org`; the
parsed data in log is
`"nodes":[{"host":"54.175.87.239","priority":1,"domain":"httpbin.org","port":80,"weight":100,"upstream_host":"httpbin.org"}]`
2. change `apisix/utils/upstream.lua` to mock dns random error, note the
`1693542089` is a `now() + 60`
```lua
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
if host == "httpbin.org" and ngx_now() <= 1693542089 then
if random(1,10) % 2 == 0 then
core.log.error("101 empty records")
return new_nodes
end
-- return nil, "failed to query the DNS server: timeout11"
end
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
```
3. `apisix reload`
## do requests
1. `wrk -c2 -t2 -d60s http://{}/get`
2. and after the wrk finished, do `curl http://{}/get` for about 10 times,
got 200 and 503
## the log
when 503, there got no `dns` logs before `no valid upstream node`
```
2023/09/01 04:24:20 [info] 140701#140701: *15533385 [lua]
radixtree_uri_with_parameter.lua:53: match(): route match mode:
radixtree_uri_with_parameter
2023/09/01 04:24:20 [info] 140701#140701: *15533385 [lua] init.lua:572:
http_access_phase(): matched route:
{"key":"/bk-gateway-apisix/routes/test.prod.2423","modifiedIndex":532500,"clean_handlers":"table:
0x7f7d645c64c8","has_domain":true,"value":{"create_time":1693309224,"methods":["GET"],"service_id":"test.prod.stage-12","update_time":1693539224,"timeout":{"send":150,"read":150,"connect":150},"labels":{"gateway.bk.tencent.com/gateway":"test","gateway.bk.tencent.com/stage":"prod"},"uris":["/api/test/prod/dns","/api/test/prod/dns/"],"status":1,"priority":0,"name":"test-prod-dns","id":"test.prod.2423","plugins":{"bk-proxy-rewrite":{"match_subpath":false,"subpath_param_name":":ext","method":"GET","use_real_request_uri_unsafe":false,"uri":"/get"},"bk-resource-context":{"bk_resource_auth":{"resource_perm_required":false,"skip_user_verification":false,"verified_app_required":false,"verified_user_required":false},"bk_resource_id":2423,"bk_resource_name":"dns","bk_resource_auth_obj":{"r
esource_perm_required":false,"skip_user_verification":false,"verified_app_required":false,"verified_user_required":false}}},"upstream":{"nodes":{},"hash_on":"vars","scheme":"http","parent":{"key":"/bk-gateway-apisix/routes/test.prod.2423","modifiedIndex":532500,"clean_handlers":{},"has_domain":true,"value":"table:
0x7f7d9706c708","update_count":0,"orig_modifiedIndex":532500,"createdIndex":532332},"type":"roundrobin","pass_host":"node","timeout":{"send":150,"read":150,"connect":150}}},"update_count":0,"orig_modifiedIndex":532500,"createdIndex":532332
2023/09/01 04:24:20 [info] 140701#140701: *15533385 [lua] plugin.lua:630:
merge_service_route(): route conf:
{"key":"/bk-gateway-apisix/routes/test.prod.2423","modifiedIndex":532500,"clean_handlers":"table:
0x7f7d645c64c8","has_domain":true,"value":{"create_time":1693309224,"methods":["GET"],"service_id":"test.prod.stage-12","update_time":1693539224,"timeout":{"send":150,"read":150,"connect":150},"labels":{"gateway.bk.tencent.com/gateway":"test","gateway.bk.tencent.com/stage":"prod"},"uris":["/api/test/prod/dns","/api/test/prod/dns/"],"status":1,"priority":0,"name":"test-prod-dns","id":"test.prod.2423","plugins":{"bk-proxy-rewrite":{"match_subpath":false,"subpath_param_name":":ext","method":"GET","use_real_request_uri_unsafe":false,"uri":"/get"},"bk-resource-context":{"bk_resource_auth":{"resource_perm_required":false,"skip_user_verification":false,"verified_app_required":false,"verified_user_required":false},"bk_resource_id":2423,"bk_resource_name":"dns","bk_resource_auth_obj":
{"resource_perm_required":false,"skip_user_verification":false,"verified_app_required":false,"verified_user_required":false}}},"upstream":{"nodes":{},"hash_on":"vars","scheme":"http","parent":{"key":"/bk-gateway-apisix/routes/test.prod.2423","modifiedIndex":532500,"clean_handlers":{},"has_domain":true,"value":"table:
0x7f7d9706c708","update_count":0,"orig_modifiedIndex":532500,"createdIndex":532332},"type":"roundrobin","pass_host":"node","timeout":{"send":150,"read":150,"connect":150}}},"update_count":0,"orig_modifiedIndex":532500,"createdIndex":532332}
2023/09/01 04:24:21 [error] 140701#140701: *15534047 [lua] init.lua:486:
handle_upstream(): failed to set upstream: no valid upstream node
```
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
