无数据库声明式配置下Kong服务访问失败排查求助

Hey everyone, I'm running into issues with my Kong declarative setup when trying to access a mock service, and I'm hoping someone can point me in the right direction.

My Kong Declarative Configuration #

I've set up Kong using declarative configuration with the following service and route:

services:
- name: mock-service
  url: http://mockbin.org/request
  path: /
  tags:
  - example
routes:
- name: mock-route
  methods:
  - GET
  hosts: ["mockbin.org"]
  paths: ["/mock"]

Current Status #

The service and route have been registered successfully — I can verify their existence by checking the admin API endpoints:

• http://localhost:8001/services shows the mock-service entry
• http://localhost:8001/routes shows the mock-route entry

Issues Encountered #

When trying to access the mockbin service through Kong, I hit two problems:

1. Accessing http://localhost:8000/mock without a Host header returns:

   {"message": "no Route matched with those values"}
   

2. Accessing the same URL with Host: mockbin.org header returns a 500 error with the message:

   An unexpected error occurred

Kong Error Logs #

Looking at Kong's logs, here's the relevant error output:

2019/12/30 17:46:44 [notice] 60919#0: *2 [kong] init.lua:298 declarative config loaded from /var/kong.yml, context: init_worker_by_lua*
2019/12/30 17:46:44 [warn] 60917#0: *1 [lua] globalpatches.lua:52: sleep(): executing a blocking 'sleep' (0.001 seconds), context: init_worker_by_lua*
2019/12/30 17:49:56 [error] 60920#0: *1586 upstream timed out (110: Connection timed out) while connecting to upstream, client: 172.21.200.35, server: kong, request: "GET /mock HTTP/1.1", upstream: "http://3.228.254.201:80/request", host: "mockbin.org"
2019/12/30 17:49:56 [error] 60920#0: *1586 [lua] balancer.lua:917: balancer_execute(): DNS resolution failed: dns server error: 100 cache only lookup failed. Tried: ["(short)mockbin.org:(na) - cache-miss","mockbin.org:1 - cache only lookup failed/dns server error: 100 cache only lookup failed","mockbin.org:33 - cache only lookup failed/dns server error: 100 cache only lookup failed","mockbin.org:5 - cache only lookup failed/dns server error: 100 cache only lookup failed"] while connecting to upstream, client: 172.21.200.35, server: kong, request: "GET /mock HTTP/1.1", upstream: "http://3.228.254.201:80/request", host: "mockbin.org"
2019/12/30 17:49:56 [error] 60920#0: *1586 [lua] init.lua:800: balancer(): failed to retry the dns/balancer resolver for mockbin.org' with: dns server error: 100 cache only lookup failed while connecting to upstream, client: 172.21.200.35, server: kong, request: "GET /mock HTTP/1.1", upstream: "http://3.228.254.201:80/request", host: "mockbin.org"
2019/12/30 17:57:02 [error] 60918#0: *6694 upstream timed out (110: Connection timed out) while connecting to upstream, client: 172.21.200.35, server: kong, request: "GET /mock HTTP/1.1", upstream: "http://3.228.254.201:80/request", host: "mockbin.org"
2019/12/30 17:58:02 [error] 60918#0: *6694 upstream timed out (110: Connection timed out) while connecting to upstream, client: 172.21.200.35, server: kong, request: "GET /mock HTTP/1.1", upstream: "http://52.21.131.234:80/request", host: "mockbin.org"
2019/12/30 17:58:02 [error] 60918#0: *6694 [lua] balancer.lua:917: balancer_execute(): DNS resolution failed: dns server error: 100 cache only lookup failed. Tried: ["(short)mockbin.org:(na) - cache-miss","mockbin.org:1 - cache only lookup failed/dns server error: 100 cache only lookup failed","mockbin.org:33 - cache only lookup failed/dns server error: 100 cache only lookup failed","mockbin.org:5 - cache only lookup failed/dns server error: 100 cache only lookup failed"] while connecting to upstream, client: 172.21.200.35, server: kong, request: "GET /mock HTTP/1.1", upstream: "http://52.21.131.234:80/request", host: "mockbin.org"
2019/12/30 17:58:02 [error] 60918#0: *6694 [lua] init.lua:800: balancer(): failed to retry the dns/balancer resolver for mockbin.org' with: dns server error: 100 cache only lookup failed while connecting to upstream, client: 172.21.200.35, server: kong, request: "GET /mock HTTP/1.1", upstream: "http://52.21.131.234:80/request", host: "mockbin.org"

What I've Tried So Far #

I've gone through several resources to troubleshoot this, including:

• Kong's official documentation on configuring services
• A guide on securing APIs with Kong and Keycloak
• A tutorial explaining Kong plugins like key authentication and rate limiting for Flask APIs

Unfortunately, none of these have helped resolve the issues. I'd really appreciate any insights or suggestions on how to fix this!

内容的提问来源于stack exchange，提问作者shiv roy