Problem connecting FDP server to FDP Index server

[welharrak]

Hi everyone,

I'm trying to connect my FDP server to the FDP Index server for testing purposes by having the Index and the FDP server run on the same machine.

In the Index server's application.yml, I have set:

instance:
  intex: true
  ...
server:
  forward-headers-strategy: NATIVE

In the FDP (normal) server's application-development.yml, I have:

ping:
  enabled: true
  endpoint: http://localhost:8080

However, despite this setup, the FDP server and the Index server do not connect as expected. I’m not seeing any registration or successful pings between them.

Is there something else I need to configure or be aware of when connecting an FDP server to its own Index server for local testing?

Thanks in advance for any help or advice!

[dennisvang]

Hi @welharrak , could you tell me which version of the FDP and FDP-client you are using?

[welharrak]

Hello @dennisvang, thanks for respondig. I'm running the latest version, 1.17.1.

[dennisvang]

Hi @welharrak, to help us find the cause, could you post the contents of your docker compose file, or at least a minimal reproducible example?

I do see a few issues in you yaml snippets above:

• intex: true should be index: true (I assume this is just a typo)

• endpoint: http://localhost:8080 this should be endpoints instead of endpoint (the docs are outdated here), see e.g. here

  Possibly you should use the docker service name instead of localhost, for the index endpoint. For example endpoint: http://fdp-index:8080 (depending on details of your compose file).

In addition, could you post the relevant part of the fdp logs? You can get them using e.g. docker compose logs fdp ( depending on the details of your compose file).

[welharrak]

Hi @dennisvang,
Thanks a lot for your detailed reply and for spotting those issues, really appreciate it! I'll definitely try out your suggestions when I get a moment.

[dennisvang]

Here's an example compose file for local testing that should work:

name: fdp117
services:
  mongo:
    image: "mongo:8.0"
    healthcheck:
      test: |
        [ $(mongosh --quiet --host localhost:27017 --eval "db.runCommand('ping').ok") = 1 ] || exit 1
      start_interval: 3s
      start_period: 30s

  fdp:
    image: "fairdata/fairdatapoint:1.17"
    environment:
      SERVER_PORT: 8082
      INSTANCE_CLIENTURL: http://localhost:8083
      INSTANCE_PERSISTENTURL: http://localhost:8083
      # https://github.com/FAIRDataTeam/FAIRDataPoint/blob/6587b09dcefb0e4fc13fd1f045c0c6dd47bd61fa/src/main/java/nl/dtls/fairdatapoint/api/dto/settings/SettingsPingDTO.java#L41
      PING_ENABLED: true
      PING_ENDPOINTS: http://fdp-index:8084
      PING_INTERVAL: 5000  # ms
    depends_on:
      mongo:
        condition: service_healthy
    healthcheck:
      test: wget -q --spider http://localhost:8082 || exit 1
      start_interval: 3s
      start_period: 30s

  fdp-client:
    image: "fairdata/fairdatapoint-client:1.17"
    ports:
      - "127.0.0.1:8083:80"
    environment:
      FDP_HOST: fdp:8082
    depends_on:
      fdp:
        condition: service_healthy

  fdp-index:
    image: "fairdata/fairdatapoint:1.17"
    environment:
      SERVER_PORT: 8084
      INSTANCE_INDEX: true
      INSTANCE_CLIENTURL: http://localhost:8085
      INSTANCE_PERSISTENTURL: http://localhost:8085
      FDP_MONGO_DB: 'fdp-index'
      PING_ENABLED: false
    depends_on:
      mongo:
        condition: service_healthy
    healthcheck:
      test: wget -q --spider http://localhost:8084 || exit 1
      start_interval: 3s
      start_period: 30s

  fdp-index-client:
    image: "fairdata/fairdatapoint-client:1.17"
    ports:
      - "127.0.0.1:8085:80"
    environment:
      APP: fairdatapoint-index
      FDP_HOST: fdp-index:8084
    depends_on:
      fdp-index:
        condition: service_healthy

The fdp and fdp-index can communicate, but the index rejects pings from localhost domains by default, as can be seen from the logs:

fdp-1  | 2025-07-03 08:06:04,388 83128 [scheduling-1] INFO  nl.dtls.fairdatapoint.service.ping.PingService - Pinging http://fdp-index:8084
fdp-1  | 2025-07-03 08:06:04,405 83145 [scheduling-1] WARN  nl.dtls.fairdatapoint.service.ping.PingService - Failed to ping http://fdp-index:8084: 403  on POST request for "http://fdp-index:8084": "{"timestamp":1751529964403,"status":403,"error":"Forbidden","message":"Client URL is denied: http://localhost:8083"}"

fdp-index-1  | 2025-07-03 08:06:24,398 103166 [http-nio-8084-exec-6] INFO  nl.dtls.fairdatapoint.api.controller.index.IndexPingController - Received ping from 172.23.0.4
fdp-index-1  | 2025-07-03 08:06:24,400 103168 [http-nio-8084-exec-6] INFO  nl.dtls.fairdatapoint.service.index.settings.IndexSettingsService - Checking if ping.clientUrl is on deny list: http://localhost:8083
fdp-index-1  | 2025-07-03 08:06:24,402 103170 [http-nio-8084-exec-6] INFO  nl.dtls.fairdatapoint.service.index.event.EventService - Received ping is denied

FAIRDataPoint/src/main/java/nl/dtls/fairdatapoint/entity/index/settings/IndexSettingsPing.java

Line 61 in 331b813

ping.setDenyList(Collections.singletonList("^(http|https)://localhost(:[0-9]+){0,1}.*$"));