jaeger-collector with elasticsearch pre-shared key (custom http header)

[flomate]

Hi,

I'm tying to connect the jaeger-collector with an existing ElasticSearch cluster.
For the connection, the ElasticSearch requires a Pre-Shared Key to be send from the client (jaeger-collector) in a custom HTTP Header (e.g. X-INTERNET-PSK: xxx).
Is it possible to send a custom HTTP header from the jaeger-collector to ElasticSearch? How this can be achieved?

Many thanks in advance.