No APM agent token visible in Kibana with local Tilt setup

[SylvainJuge]

When using tilt setup, we can use APM agents with the http://localhost:8200 endpoint.

However, the secret token (or API key) that APM agents have to use is not shown in the Kibana UI:

The secret token is still generated and used by apm-server and we can use the following kubectl command to retrieve it:

kubectl get secret/apm-server-apm-token -o go-template='{{index .data "secret-token" | base64decode}}'

This is identical to this command in our documentation but with a different server name.

[axw]

Thanks @SylvainJuge. Ultimately we'll probably need to move this to https://github.com/elastic/cloud-on-k8s, but we should figure out the solution first.

IIANM, in ESS the UI pulls all this configuration from the Fleet integration policy. Perhaps we should update ECK to create one similarly.