此API用于获取有关集群及其节点的信息,并对其进行更改。 对于调用此API,需要指定节点名称,地址或_local
。 例如
GET http://localhost:9200/_nodes/_local或者
Get http://localhost:9200/_nodes/127.0.0.1响应
{ "cluster_name":"elasticsearch", "nodes":{ "Vy3KxqcHQdm4cIM22U1ewA":{ "name":"Red Guardian", "transport_address":"127.0.0.1:9300", "host":"127.0.0.1", "ip":"127.0.0.1", "version":"2.1.1", "build":"40e2c53", "http_address":"127.0.0.1:9200", } } }集群运行状况
此API用于通过追加health
关键字来获取集群运行状况的状态。 例如
GET http://localhost:9200/_cluster/health响应
{ "cluster_name":"elasticsearch", "status":"yellow", "timed_out":false, "number_of_nodes":1, "number_of_data_nodes":1, "active_primary_shards":23, "active_shards":23, "relocating_shards":0, "initializing_shards":0, "unassigned_shards":23, "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":50.0 }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。 例如
GET http://localhost:9200/_cluster/state 10. Elasticsearch — Cluster APIs响应
{ "cluster_name":"elasticsearch", "version":27, "state_uuid":"B3P7uHGKQUGsSsiX2rGYUQ", "master_node":"Vy3KxqcHQdm4cIM22U1ewA", }群集统计信息
此API有助于使用’stats
‘关键字检索有关集群的统计信息。 此API返回碎片编号,存储大小,内存使用情况,节点数,角色,操作系统和文件系统。 例如
GET http://localhost:9200/_cluster/stats响应
{ "timestamp":1454496710020, "cluster_name":"elasticsearch", "status":"yellow", "indices":{ "count":5, "shards":{ "total":23, "primaries":23, "replication":0.0," } } }正在等待的群集任务
此API用于监视任何集群中的挂起任务。任务类似于创建索引,更新映射,分配碎片,故障碎片等。例如
GET http://localhost:9200/_cluster/pending_tasks
此API用于将分片从一个节点移动到另一个节点,或者用于取消任何分配或分配任何未分配的碎片。 例如
POST http://localhost:9200/_cluster/reroute请求正文
{ "commands" : [ { "move" : { "index" : "schools", "shard" : 2, "from_node" : "nodea", "to_node" : "nodeb" } }, { "allocate" : { "index" : "test", "shard" : 1, "node" : "nodec" } } ] }群集更新设置
此API允许使用settings
关键字更新群集的设置。有两种类型的设置 - persistent
(在重新启动时应用)和transient
(在完全群集重新启动后不会生存)。
此API用于检索集群的一个节点的统计信息。节点状态与集群几乎相同。 例如
GET http://localhost:9200/_nodes/stats响应
{ "cluster_name":"elasticsearch", "nodes":{ "Vy3KxqcHQdm4cIM22U1ewA":{ "timestamp":1454497097572, "name":"Red Guardian", "transport_address":"127.0.0.1:9300", "host":"127.0.0.1", "ip":["127.0.0.1:9300", } } }
此API可用于检索有关集群中每个节点上当前热线程的信息。 例如
GET http://localhost:9200/_nodes/hot_threads响应
{Red Guardian} {Vy3KxqcHQdm4cIM22U1ewA} {127.0.0.1}{127.0.0.1:9300}Hot threads at 2017-02-01T10:59:48.856Z, interval = 500ms, busiestThreads = 3, ignoreIdleThreads = true:0.0% (0s out of 500ms) cpu usage by thread 'Attach Listener' unique snapshot unique snapshot