Elasticsearch集群基本操作

检查集群的命令

$ curl http://172.16.101.55:9200/_cat
=^.^=
/_cat/allocation
/_cat/shards
/_cat/shards/{index}
/_cat/master
/_cat/nodes
/_cat/tasks
/_cat/indices
/_cat/indices/{index}
/_cat/segments
/_cat/segments/{index}
/_cat/count
/_cat/count/{index}
/_cat/recovery
/_cat/recovery/{index}
/_cat/health
/_cat/pending_tasks
/_cat/aliases
/_cat/aliases/{alias}
/_cat/thread_pool
/_cat/thread_pool/{thread_pools}
/_cat/plugins
/_cat/fielddata
/_cat/fielddata/{fields}
/_cat/nodeattrs
/_cat/repositories
/_cat/snapshots/{repository}
/_cat/templates

健康状态

_cluster/health?

$ curl -XGET http://172.16.101.55:9200/_cluster/health?pretty
{
  "cluster_name" : "dev-es",
  "status" : "green",
  "timed_out" : false,
  "number_of_nodes" : 1,
  "number_of_data_nodes" : 1,
  "active_primary_shards" : 0,
  "active_shards" : 0,
  "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" : 100.0
}

GET /_cat/health?v

$ curl -X GET "172.16.101.55:9200/_cat/health?v"
epoch      timestamp cluster status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent
1575120812 13:33:32  dev-es  green           1         1      0   0    0    0        0             0                  -                100.0%

关于status状态栏

• green：表示集群一切正常
• yellow：表示所有数据都是可用状态，但是部分副本未分配，集群目前处于可用状态
• red：表示部分数据由于未知原因不可达，集群处于部分可用状态（例如集群可以继续处理向可用的数据分片请求的回复），但是此时应该立刻进行集群故障检测。 

注：9200是http协议的RESTful接口