Loki endpoint

[hijackit]

Hi, I'm trying to use this cool library to send logs to a cloud-based loki instance using log4j2

I expected to see a configuration field like the following:
<url>http://host:port/loki/api/v1/push</url>
instead of:
<host>loki-host</host> <port>loki-port</port>

How does this library send messages to loki? Through the gRPC protocol?
I suppose that the port should match the grpc_listen_port loki configuration, is that right?
Any chance to send messages to the loki rest API?

Thanks!

[tkowalcz]

Hi, thanks for kind words. Sorry, I should have documented that better. Is it Grafana cloud you are connecting to? I wanted to try it out myself and document it, I'll make that a priority.

Now back to your question - tjahzi does http POST to /loki/api/v1/push. So instead of

<url>http://host:port/loki/api/v1/push</url>

you can do:

<host>host</host>
<port>port</port>

and it should work all the same. Please let me know if I can help or modify something on my end.

[hijackit]

It make sense!
I gave it a try, but I think there is another problem now :)
The loki endpoint is behind HTTPS, so what I did is:

<host>host</host>
<port>443</port>

but I think that the http client used by tjahzi does not recognize that the 443 port is "special" and does not start a correct https connection.

Setting the log4j configuration to verbose, I can see in the logs the response of our reverse-proxy (nginx):
400 The plain HTTP request was sent to HTTPS port

Any suggestion?
Thanks for your help, much appreciated!

[tkowalcz]

I think that at this point the only option is to add a missing feature :) I have created ticket #45 to track this. I should be able to implement it today, worst case - end of this week.

[hijackit]

It would be amazing, thanks for your help!

[tkowalcz]

There is a new release with support for https and basic auth: https://github.com/tkowalcz/tjahzi/releases/tag/tjahzi-parent-0.9.6.

I have added test case to the CI that integrates with Grafana Cloud. Also run a logger for several hours that delivered logs there. Seems to work fine :)

[hijackit]

I confirm that it works like a charm also in our environment!