在部署 ElasticSearch7.x 时，启动节点报错
Caused by: org.elasticsearch.xpack.monitoring.exporter.ExportException: failed to flush export bulk [default_local]
Caused by: java.lang.IllegalStateException: There are no ingest nodes in this cluster, unable to forward request to an ingest node.
报错分析
1. 缺少 ingest 节点
2. 创建monitor相关索引时，需要调用 bulk api
添加 ingest 节点后的日志记录
[2021-11-11T14:42:18,133][INFO ][o.e.c.m.MetadataCreateIndexService] [es_10.162.17.15_9253]
[.monitoring-es-7-2021.11.11] creating index, cause [auto(bulk api)],
templates [.monitoring-es], shards [1]/[0]