Graylog 6 using opensearch needs elasticsearch for authentication?

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1. Describe your incident:
New instal of Graylog 6 on Ubuntu 22.
Followed this guide: Ubuntu Installation
Except step 5 of the ‘edit the graylog config file’ section:
‘5. Edit the elasticsearch_hosts setting to include a list of comma-separated URIs to one or more valid OpenSearch nodes.’
Just like the warning says, i cant use my root password.
do i simply install elasticsearch and run the command? do i need to configure elasticsearch first?

2. Describe your environment:

  • OS Information:
    ubuntu 22
  • Package Version:
    graylog 6
  • Service logs, configurations, and environment variables:

3. What steps have you already taken to try and solve the problem?
verified graylog, mongod and opensearch services are running

4. How can the community help?
confirm i need elasticsearch and where i can find correct configuration

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Hey @cdauray

By default graylog will connect using localhost. if you are creating a OpenSearch cluster you can add user/password that has roles to connect to OpenSearch. This depends on how you set up your cluster.

For example without a user/password

elasticsearch_hosts = http://localhost:9200,,

once configured restart Graylog service, you should have OpenSearch install and reachable

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