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采用网页请求，返回如下数据，

http://81.0.16.18:9200/

{"name" : "node-1","cluster_name" : "my-application","cluster_uuid" : "d-nieclISpGFjJQyc7TC3A","version" : {"number" : "7.10.2","build_flavor" : "default","build_type" : "tar","build_hash" : "747e1cc71def077253878a59143c1f785afa92b9","build_date" : "2021-01-13T00:42:12.435326Z","build_snapshot" : false,"lucene_version" : "8.7.0","minimum_wire_compatibility_version" : "6.8.0","minimum_index_compatibility_version" : "6.0.0-beta1"},"tagline" : "You Know, for Search"
}

ip:9200/_cat/nodes?v

ip         heap.percent ram.percent cpu load_1m load_5m load_15m node.role  master name
172.19.0.1           18          56   0    0.00    0.02     0.05 cdhilmrstw *      node-1

其他数据，（此时尚未写入数据）

:9200/_cat/

=^.^=
/_cat/allocation
/_cat/shards
/_cat/shards/{index}
/_cat/master
/_cat/nodes
/_cat/tasks
/_cat/indices
/_cat/indices/{index}
/_cat/segments
/_cat/segments/{index}
/_cat/count
/_cat/count/{index}
/_cat/recovery
/_cat/recovery/{index}
/_cat/health
/_cat/pending_tasks
/_cat/aliases
/_cat/aliases/{alias}
/_cat/thread_pool
/_cat/thread_pool/{thread_pools}
/_cat/plugins
/_cat/fielddata
/_cat/fielddata/{fields}
/_cat/nodeattrs
/_cat/repositories
/_cat/snapshots/{repository}
/_cat/templates
/_cat/ml/anomaly_detectors
/_cat/ml/anomaly_detectors/{job_id}
/_cat/ml/trained_models
/_cat/ml/trained_models/{model_id}
/_cat/ml/datafeeds
/_cat/ml/datafeeds/{datafeed_id}
/_cat/ml/data_frame/analytics
/_cat/ml/data_frame/analytics/{id}
/_cat/transforms
/_cat/transforms/{transform_id}