Elasticsearch - 集群 API
集群 API 用于获取有关集群及其节点的信息并对其进行更改。要调用此 API,我们需要指定节点名称、地址或 _local。
GET /_nodes/_local
运行上述代码后,我们得到如下所示的响应 −
……………………………………………… cluster_name" : "elasticsearch", "nodes" : { "FKH-5blYTJmff2rJ_lQOCg" : { "name" : "ubuntu", "transport_address" : "127.0.0.1:9300", "host" : "127.0.0.1", "ip" : "127.0.0.1", "version" : "7.0.0", "build_flavor" : "default", "build_type" : "tar", "build_hash" : "b7e28a7", "total_indexing_buffer" : 106502553, "roles" : [ "master", "data", "ingest" ], "attributes" : { ………………………………………………
集群健康
此 API 用于通过附加"health"关键字来获取集群健康状态。
GET /_cluster/health
运行上述代码后,我们得到如下所示的响应 −
{ "cluster_name" : "elasticsearch", "status" : "yellow", "timed_out" : false, "number_of_nodes" : 1, "number_of_data_nodes" : 1, "active_primary_shards" : 7, "active_shards" : 7, "relocating_shards" : 0, "initializing_shards" : 0, "unassigned_shards" : 4, "delayed_unassigned_shards" : 0, "number_of_pending_tasks" : 0, "number_of_in_flight_fetch" : 0, "task_max_waiting_in_queue_millis" : 0, "active_shards_percent_as_number" : 63.63636363636363 }
集群状态
此 API 用于通过附加"state"关键字 URL 来获取有关集群的状态信息。状态信息包含版本、主节点、其他节点、路由表、元数据和块。
GET /_cluster/state
运行上述代码后,我们得到如下所示的响应 −
……………………………………………… { "cluster_name" : "elasticsearch", "cluster_uuid" : "IzKu0OoVTQ6LxqONJnN2eQ", "version" : 89, "state_uuid" : "y3BlwvspR1eUQBTo0aBjig", "master_node" : "FKH-5blYTJmff2rJ_lQOCg", "blocks" : { }, "nodes" : { "FKH-5blYTJmff2rJ_lQOCg" : { "name" : "ubuntu", "ephemeral_id" : "426kTGpITGixhEzaM-5Qyg", "transport } ………………………………………………
集群统计信息
此 API 通过使用"stats"关键字帮助检索有关集群的统计信息。此 API 返回分片编号、存储大小、内存使用情况、节点数、角色、操作系统和文件系统。
GET /_cluster/stats
运行上述代码后,我们得到如下所示的响应 −
…………………………………………. "cluster_name" : "elasticsearch", "cluster_uuid" : "IzKu0OoVTQ6LxqONJnN2eQ", "timestamp" : 1556435464704, "status" : "yellow", "indices" : { "count" : 7, "shards" : { "total" : 7, "primaries" : 7, "replication" : 0.0, "index" : { "shards" : { "min" : 1, "max" : 1, "avg" : 1.0 }, "primaries" : { "min" : 1, "max" : 1, "avg" : 1.0 }, "replication" : { "min" : 0.0, "max" : 0.0, "avg" : 0.0 } ………………………………………….
集群更新设置
此 API 允许您使用"settings"关键字更新集群的设置。 有两种类型的设置:持久性(在重新启动后应用)和瞬态(在集群完全重新启动后不复存在)。
节点统计信息
此 API 用于检索集群中一个或多个节点的统计信息。节点统计信息与集群几乎相同。
GET /_nodes/stats
运行上述代码后,我们得到如下所示的响应 −
{ "_nodes" : { "total" : 1, "successful" : 1, "failed" : 0 }, "cluster_name" : "elasticsearch", "nodes" : { "FKH-5blYTJmff2rJ_lQOCg" : { "timestamp" : 1556437348653, "name" : "ubuntu", "transport_address" : "127.0.0.1:9300", "host" : "127.0.0.1", "ip" : "127.0.0.1:9300", "roles" : [ "master", "data", "ingest" ], "attributes" : { "ml.machine_memory" : "4112797696", "xpack.installed" : "true", "ml.max_open_jobs" : "20" }, ………………………………………………………….
节点 hot_threads
此 API 可帮助您检索有关集群中每个节点上的当前热线程的信息。
GET /_nodes/hot_threads
运行上述代码后,我们得到如下所示的响应 −
:::{ubuntu}{FKH-5blYTJmff2rJ_lQOCg}{426kTGpITGixhEzaM5Qyg}{127.0.0.1}{127.0.0.1:9300}{ml.machine_memory=4112797696, xpack.installed=true, ml.max_open_jobs=20} Hot threads at 2019-04-28T07:43:58.265Z, interval=500ms, busiestThreads=3, ignoreIdleThreads=true: