Configurable сustom HTTP header for external integrations (Loki, Grafana, etc.)

[ir0njaw]

Motivation

My Loki instance is behind a proxy that requires a custom header for authentication before forwarding the request to Loki. The current implementation of Falcosidekick does not allow adding a custom header to the request.

Feature

Allow users to configure the custom HTTP Header for various external integrations, in particular Loki.

for example:
--set falcosidekick.config.loki.customHeader="X-token: 12345"

POST /loki/api/v1/push HTTP/1.1
Host: 1.2.3.4:3100
User-Agent: Falcosidekick
X-token: 12345
Content-Length: 532
Content-Type: application/json
Accept-Encoding: gzip

[Issif]

Nice idea, I will work on that asap

[Issif]

I will not consider the pure SAAS outputs or not HTTP protocol, here's the list of outputs that could benefit new headers:

• Rocketchat
• Mattermost
• InfluxDB
• Alertmanager
• Elasticsearch
• Loki
• Grafana
• NodeRed
• CloudEvents
• Kafka REST
• OpenFAAS
• WebUI
• Zincsearch
• Gotify
• Tekton

It's a lot, I'll focus on few as nobody else requested this feature for now:

• Loki
• Grafana
• Elasticsearch

Is that ok for you?