No Index after indexing with Apache Nutch

[Nutz3r]

Hi everyone!
I'm struggling with Elasticsearch in combination with Apache Nutch.
With Apache Nutch I want to crawl my websites and index their content to Elasticsearch.
Unfortunately the index isn't created, even if Nutch says that everything is done. (Step 3 of the tutorial)
I'm using Apache Nutch 1.17 in combination with Elasticsearch and Kibana 7.10 on CentOS7.
This is the tutorial I'm following (except installation and konfiguration of ES and Kibana:

Web Crawling with Nutch and Elasticsearch | Quick to Master

I'm wondering, why the following console output shows me "localhost", even if I've configured the IP address.

Hopefully somebody may help me out.

Thanks!

Here is the final console output.

ElasticIndexWriter:
┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│host                       │Comma-separated list of hostnames                                                   │localhost│
├───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│port                       │The port to connect to elastic server.                                              │9200     │
├───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│index                      │Default index to send documents to.                                                 │nutch    │
├───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│username                   │Username for auth credentials                                                       │elastic  │
├───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│password                   │Password for auth credentials                                                       │         │
├───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│max.bulk.docs              │Maximum size of the bulk in number of documents.                                    │250      │
├───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│max.bulk.size              │Maximum size of the bulk in bytes.                                                  │2500500  │
├───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│exponential.backoff.millis │Initial delay for the BulkProcessor exponential backoff policy.                     │100      │
├───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│exponential.backoff.retries│Number of times the BulkProcessor  exponential  backoff  policy  should  retry  bulk│10       │
│                           │operations.                                                                         │         │
├───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│bulk.close.timeout         │Number of seconds allowed for the BulkProcessor to complete its last operation.     │600      │
└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────


Indexer: number of documents indexed, deleted, or skipped:
Indexer:      9  indexed (add/update)
Indexer: finished at 2020-11-12 11:16:34, elapsed: 00:00:02