502 Gateway error when trying to connect remotly to InfluxDB

I deployed InlfuxDB on AWS with docker.

Here is the docker compose:

version: '3.6'
services:
  influxdb:
    image: influxdb:1.7.4
    restart: always
    container_name: "influxdb"
    volumes:
     - ./influxDB/influxdb.conf:/etc/influxdb/influxdb.conf:ro
     - ./influxDB/data:/var/lib/influxdb/
    networks:
      - influxdb
    ports:
      - "8086:8086"
networks:
  influxdb:
      name: influxdb

Instance is working fine.

In local, I deployed grafana, also with docker, and I was able to connect instance with those settings:

url: https://dev.influx.<company>.com
user: admin
pass: admin
db: company

But when I try to connect manually via Postman, with this url:

https://dev.influx.<company>.com/query --data-urlencode "q=SHOW MEASURES"

I get 502 Bad Gateway

I use Caddy as reverse proxy, and Caddy doesn't show logs when I run the query

What is happening ?

Solution

I don't see how you're passing credentials on that curl request. Are you using basic auth on the Caddy proxy?

Also, the InfluxQL query is incorrect:

SHOW MEASUREMENTS is the correct query