简单的集群管理

快速检查集群的健康状况

GET /_cat/health?v


{
  "cluster_name": "es-log",
  "status": "green",
  "timed_out": false,
  "number_of_nodes": 2,
  "number_of_data_nodes": 2,
  "active_primary_shards": 66,
  "active_shards": 132,
  "relocating_shards": 0,
  "initializing_shards": 0,
  "unassigned_shards": 0,
  "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": 100
}

集群的健康状况

集群的健康状况使用green、yellow、red 3种颜色表示

green：每个索引的primary shard和replica shard都是active状态的

yellow：每个索引的primary shard都是active状态的，但是部分replica shard不是active状态，处于不可用的状态

red：不是所有索引的primary shard都是active状态的，部分索引有数据丢失了

索引管理

查看集群中有哪些索引

GET /_cat/indices?v

health status index                           uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   .monitoring-es-2-2017.08.04     3ge5x25mTb2__tr6Sleqhg   1   1      85733          798     86.1mb           43mb
green  open   .monitoring-es-2-2017.07.31     pYmUsT8rT7WK-yyBbLiWiA   1   1      32352          146     27.1mb         13.5mb
green  open   .monitoring-es-2-2017.07.28     oCq3rTWbSU-b8C7vuI3vaA   1   1      16473          273     14.9mb          7.4mb
green  open   .monitoring-kibana-2-2017.07.28 eJnF7v1bQJmRAcSg6ve6OA   1   1        195            0    281.1kb        140.5kb
green  open   .monitoring-kibana-2-2017.08.06 7DJqZ7i6TXqN8gU8xbuR0A   1   1        721            0    387.1kb        193.5kb
green  open   .kibana                         K3oCOVvAQS-7HItGeSN98w   1   1         99           67    456.6kb        228.3kb
green  open   .security                       ss49jo3ZTOux7-PFK68tjw   1   1          5            0     32.5kb         16.2kb

创建索引

PUT /test_index?pretty

health status index                           uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   test_index                      e8eqND3STmG-fzr1H_hnbQ   5   1          0            0       780b           260b
green  open   .monitoring-es-2-2017.08.04     3ge5x25mTb2__tr6Sleqhg   1   1      85733          798     86.1mb           43mb

删除索引

DELETE /test_index?pretty

health status index   uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   .monitoring-es-2-2017.08.04     3ge5x25mTb2__tr6Sleqhg   1   1      85733          798     86.1mb           43mb