Versions (relevant - OpenSearch/Dashboard/Server OS/Browser): OpenSearch 2.8.0 and above
Describe the issue:
How can I pass an empty array when putting settings as an environment variable?
As I know, if I don’t set node.roles, the node will have all the built-in roles (cluster_manager, data, ingest, search and remote_cluster_client) and if I set node.roles to an empty array, it will be a dedicated coordinating node.
The problem is that I can’t write the value directly into opensearch.yml and need to pass those settings via environment variables. Like:
# in opensearch.yml
node.roles: ${NODE_ROLES}
I want to create a dedicated coordinating node, so I was wondering what value I should put in the NODE_ROLES environment variable.
I tried a few values:
NODE_ROLES="": It’s treated as null. Set all builtin roles.NODE_ROLES=",": Same as""NODE_ROLES="[]": It makes a dynamic role that is named"[]"! That makes the node coordinating-dedicated as a result but currently most of OpenSearch client libraries don’t support dynamic roles and raise DeserializationFailedException.node_roles="[,]": Same as"[]"
How can I pass an empty array to settings via environment variables ?
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