This will match the /ping endpoint from the influxdb 1.x httpd service.
This endpoint is used by many of the clients that use the query service
and it will also be helpful for testing that the transpiler service is
up and working.
In the future, we will add the appropriate health endpoint that is
standard for 2.0. But, for the best compatibility, we have to return
something viable for 1.x clients.
The /query endpoint didn't have an orgID parameter so we can't have one
in the transpiler endpoint. This removes the parameter and replaces it
with a command line parameter that sets which organization we are using
for querying ifql.
The query service now handles some errors (not all) from the ifqld
service. This way, the transpiler, which uses the query service, can
report when it encounters an error from ifqld.
The transpiler will now correctly return errors in the JSON response.
Nathaniel Cook
Jonathan A. Sternberg