Debugging connection issues

Please try the following steps if you have trouble connecting to your cluster:

1. Check if you can connect to your cluster on the commandline

Try to curl your cluster directly, for example

# curl an unprotected cluster
curl -X GET "http://localhost:9200"

# curl a cluster that uses ssl
curl -k -X GET "https://localhost:9200"

# curl a cluster that uses authorization
curl -k -X GET -u elastic:yourpassword "https://localhost:9200"

Proceed to the next step if you see a response similar to this one:

{
  "name" : "cars10-thinkpad",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "-KjsfLD2TYC36a4FvviZjA",
  "version" : {
    "number" : "8.2.2",
    "build_flavor" : "default",
    "build_type" : "tar",
    "build_hash" : "9876968ef3c745186b94fdabd4483e01499224ef",
    "build_date" : "2022-05-25T15:47:06.259735307Z",
    "build_snapshot" : false,
    "lucene_version" : "9.1.0",
    "minimum_wire_compatibility_version" : "7.17.0",
    "minimum_index_compatibility_version" : "7.0.0"
  },
  "tagline" : "You Know, for Search"
}

2. Check if you can connect to your cluster in the browser

Try to open the domain to your cluster in the browser. Literally open it as a web page, e.g. https://localhost:9200 The following things could happen now:

1. Security warning

If your browser does not trust the SSL certificate that your cluster uses you will not be able to connect. Please visit Access clusters using SSL to trust the certificate.

2. Login prompt

If you see a login prompt simply enter the credentials of your elasticsearch user. So for example username elastic and the related password.