prometheus/server/target/etcd.yml

parameters:
  server:
    target:
      etcd:
        - host: ${_param:cluster_node01_address}
          port: ${_param:cluster_node01_port}
        - host: ${_param:cluster_node02_address}
          port: ${_param:cluster_node02_port}
        - host: ${_param:cluster_node03_address}
          port: ${_param:cluster_node03_port}