I have Elasticsearch6.0.0beta1 and logstash6.0.0beta1 installed on my Mac. Both have x-pack plugin installed.
My Elasticsearch.yml contains "xpack.security.enabled: false" and everything works. When trying to start Logstash with central configuration, it won't start since I don't use pack security.
Message on runtime:
[2017-08-10T19:45:26,911][FATAL][logstash.runner ] An unexpected error occurred! {:error=>#<ArgumentError: You must set the password using the "xpack.management.elasticsearch.password" in logstash.yml>
The centralised management feature is part of our Gold/Platinum level functionality, so the expectation there is that the cluster would have authentication enabled to protect access to the configs.
It's not mentioned in the docs though and we will get that updated accordingly.
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