### 状态查询 --- - 常用命令 ``` PUT _cluster/settings { "transient": { "cluster.routing.allocation.enable": "all" } } // 查看问题原因 GET /_cluster/allocation/explain?pretty // 查看集群节点状态 GET _cat/nodeattrs?v&s=name DELETE s_traefik-2022.02.21 // 查看索引的状态 GET _cat/nodes?v GET _cat/shards?h=index,shard,prirep,state,unassigned.reason // 查看索引的设置 GET _all/_settings GET s_traefik-2022.02.22/_settings // 查看生命周期策略 GET _ilm/policy/s_log-ilm // 查看索引创建模版 GET _template // 查看集群状态 GET _cluster/health?pretty GET _cluster/settings?pretty ``` - 获取所有`_cat`系列的操作 ```shell curl http://localhost: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 ``` >可以后面加一个v，让输出内容表格显示表头; pretty则让输出缩进更规范 - 集群状态 ```shell curl -X GET "localhost:9200/_cluster/health?pretty" ``` - 集群设置 ```shell curl 127.0.0.1:9200/_cluster/settings?pretty ``` - 节点简要信息 ```shell curl -X GET "localhost:9200/_cat/nodes?pretty&v" ip heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name 192.168.58.101 69 99 71 12.67 12.25 11.71 mdi - node-101 192.168.58.103 23 99 70 14.64 13.45 12.68 mdi - node-103 192.168.58.105 60 97 69 11.17 10.96 10.88 mdi * node-105 ``` - 节点详细信息 ```shell curl -X GET "localhost:9200/_nodes/stats/http?pretty" ``` >后面的http是查看的属性，另外还有indices, fs, http, jvm, os, process, thread_pool, discovery等，支持组合（如indices,fs,http） - 分片状态 ```shell curl -X GET "localhost:9200/_cat/shards?v&pretty" index shard prirep state docs store ip node tenmao_index_153915944934 1 p STARTED 39931 4.1mb 172.17.0.14 35S66p1 tenmao_index_153915944934 1 r STARTED 39931 4mb 172.17.0.3 DPKsmMN tenmao_index_153915944934 0 p STARTED 39634 4mb 172.17.0.2 PE8QHxz tenmao_index_153915944934 0 r STARTED 39634 4mb 172.17.0.3 DPKsmMN ``` >分片中如果存在未分配的分片， 可以查看未分片的原因：_cat/shards?h=index,shard,prirep,state,unassigned.reason&v - 索引列表 ```shell curl -X GET "localhost:9200/_cat/indices?v" health status index uuid pri rep docs.count docs.deleted store.size pri.store.size green open tenmao_index_153915944934 Z6BV1VaMRc-tC-7IucJE2w 5 1 198444 0 40.9mb 20.4mb ``` - 索引详细信息 ```shell curl -X GET "localhost:9200/chat_index_alias/_stats?pretty" ``` - 新建索引 ```shell curl -X PUT "localhost:9200/test_index" -d ' { "settings" : { "index" : { "number_of_shards" : 3, "number_of_replicas" : 2 } } }' ``` - 删除索引 ```shell curl -X DELETE "localhost:9200/test_index" ``` - 分词搜索 ```shell curl -X POST "localhost:9200/test_index/_search" -d ' { "query": { "match": { "question": "吃饭了吗" } } }' ``` - 完全匹配搜索 ```shell curl -X POST "localhost:9200/test_index/_search" -d ' { "query": { "match_phrase": { "question": "你吃饭了" } } }' ```