Environment variable syntax problems for beats monitoring

Elastic Stack Beats
1

I'm trying to pass through the monitoring elasticsearch cluster hostname as an enterprise variable and set in the metricbeat.yml and filebeat.yml. The variable is:

MONITORING_ELASTICSEARCH=elk-001

Hardcoding the name works like this:

monitoring:
  enabled: true
  elasticsearch:
    hosts: ["elk-001"]

I've tried these syntaxes for the enterprise variable, but none of them work, and the documentation is not too clear: https://www.elastic.co/guide/en/beats/filebeat/current/using-environ-vars.html

monitoring:
  enabled: true
  elasticsearch:
    hosts: ["$elk-001"] or hosts: ${elk-001}

or many others but it doesn't work.

2

Have you tried

monitoring:
  enabled: true
  elasticsearch.hosts: '$MONITORING_ELASTICSEARCH'

?

3

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