- Stop forcing es_xpack_features variable in order to let elasticsearch install default features described in http://localhost:9200/_xpack
- Change xpack test scope to be able to test default xpack install
- xpack scenario will test xpack install with default features
- xpack upgrade scenario will fully test security feature
- oss-to-xpack-upgrade will test installing only other specific features
- Cleanup some duplicate serverspec tests
- Remove `system_key`feature (deprecated in 5.6 and removed in 6.0 - [Breaking Changes 6.0.0](https://www.elastic.co/guide/en/elasticsearch/reference/6.0/breaking-6.0.0-xes.html))
- Cleanup some ansible code (especially in `when` conditions)
Previously, each of the calls generated a warning : "Using tests as
filters is deprecated. Instead of using `result|version_compare` use
`result is version_compare`. This feature will be removed in version
2.9.".
the default values are:
- es_enable_xpack: false
- es_xpack_features: ["alerting","monitoring","graph","ml","security"]
With the default values, XPACK is not installed
But the generated elasticsearch.yml contains the XPACK Settings.
Elasticsearch application refuses to start with these unknown settings
* Use log4j2.properties instead of logging.yml
* Add jvm.options
* Use bootstrap.memory_lock instead of bootstrap.mlockall
* Get rid of work directory
* Executable does not accept `-D` anymore, replace with `-E` and `-p`
* Get rid of 5.x default (file)s
