How to dynamically update services and routing configuration in kong dbless mode?

[zyiqian]

Hi everyone..

[my question]

I will disable the Ingress Controller and enabled dblessConfig. When deployed to k8s, only one proxy container will be run.

When I need to configure the services and routing in dblessConfig.config. Is it possible to update dynamically without restarting the proxy container?

Because if the proxy container is restarted, it will affect our online long-connection service. We don't want to be disconnected and reconnected.

We now update dynamically through Ingress.But I want to switch to dbless mode. I don’t know if it can have the same effect.

I don't have any idea for resolve task. Can you help me? thank you

My KONG setup

• kong:3.1

[chronolaw]

I think that the answer is yes, kong can always update the configuration without reloading.

[zyiqian]

hi @chronolaw ,

Sorry for the late reply, I want to know how to configure kong, or is there any documentation for me to learn from? Because I searched for a long time and didn't find it. thank you.

[chronolaw]

This may be helpful .https://docs.konghq.com/gateway/latest/admin-api/

[zyiqian]

I tried to create a service and route according to this guide, and the following error was returned

`$ curl -i -s -X POST http://localhost:8001/services
--data name=test-service
--data url='http://httpbin.org'
HTTP/1.1 405 Not Allowed
Date: Sun, 07 Apr 2024 03:33:00 GMT
Content-Type: application/json; charset=utf-8
Connection: keep-alive
Access-Control-Allow-Origin: *
Content-Length: 114
X-Kong-Admin-Latency: 5

{"code":12,"message":"cannot create 'services' entities when not using a database","name":"operation unsupported"}%

$ curl -i -X POST http://localhost:8001/services/test-service/routes
-H "Content-Type: application/json"
-d '{"name": "test-service1-route", "paths": [ "/path/one", "/path/two" ]}'
HTTP/1.1 405 Not Allowed
Date: Sun, 07 Apr 2024 03:35:16 GMT
Content-Type: application/json; charset=utf-8
Connection: keep-alive
Access-Control-Allow-Origin: *
Content-Length: 112
X-Kong-Admin-Latency: 6

{"code":12,"message":"cannot create 'routes' entities when not using a database","name":"operation unsupported"}%`

[chronolaw]

This is declarative configuration's help page: https://docs.konghq.com/gateway/latest/admin-api/declarative-configuration/.

You must generate a YAML file first, then use the /config endpoint, like:

curl 127.1:8001/config -F [email protected] | jq

[zyiqian]

Great. I can use this method to dynamically update service and route without restarting kong. Thank you very much.

$ ls
kong.yml
$ curl -i -X POST http://localhost:8001/config \
 --form [email protected]
 
 
 HTTP/1.1 201 Created
 Date: Tue, 09 Apr 2024 02:32:03 GMT
 ......