📅  最后修改于: 2020-10-30 14:19:23             🧑  作者: Mango
群集API用于获取有关群集及其节点的信息并在其中进行更改。要调用此API,我们需要指定节点名称,地址或_local。
GET /_nodes/_local
运行上面的代码后,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" : {
………………………………………………
该API用于通过附加’health’关键字来获取集群的运行状况。
GET /_cluster/health
运行上面的代码后,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
}
该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
运行上面的代码后,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
}
………………………………………………
此API通过使用’stats’关键字来帮助检索有关群集的统计信息。该API返回分片号,存储大小,内存使用量,节点数,角色,操作系统和文件系统。
GET /_cluster/stats
运行上面的代码后,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
}
………………………………………….
使用此API,您可以使用“设置”关键字来更新集群的设置。设置有两种类型-持久性(在重新启动中应用)和瞬态(在整个群集重新启动后不起作用)。
该API用于检索集群中另外一个节点的统计信息。节点统计信息与集群几乎相同。
GET /_nodes/stats
运行上面的代码后,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"
},
………………………………………………………….
此API可帮助您检索有关群集中每个节点上的当前热线程的信息。
GET /_nodes/hot_threads
运行上面的代码后,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: