We need to setup elasticsearch on Magento 2 when a new container starts. We have post-install scripts that could handle that and not have someone go into the admin and manually do it.
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Found a way to do it. We added these commands to our post-install script:
magento config:set catalog/search/engine 'elasticsearch5' magento config:set catalog/search/elasticsearch5_server_hostname 'elasticsearch-hostname.env'
You can also configure other things like ports:
magento config:set catalog/search/elasticsearch5_server_port '9200' magento config:set catalog/search/elasticsearch5_index_prefix 'magento2' magento config:set catalog/search/elasticsearch5_enable_auth '0' magento config:set catalog/search/elasticsearch5_server_timeout '15'
These are the engine options:
mysql - MySQL elasticsearch - Elasticsearch elasticsearch5 - Elasticsearch5.0+
If you decide to use variables on the server_hostname, you must use double quotes:
magento config:set catalog/search/elasticsearch5_server_hostname "elasticsearch-$MY_VARIABLE.env"