elasticsearch

# Elasticsearch 集群管理 ## 概述 Elasticsearch 索引管理、查询 DSL、集群运维等技能。 ## 集群管理 ### 集群状态 ```bash # 集群健康 curl -X GET "localhost:9200/_cluster/health?pretty" # 集群状态 curl -X GET "localhost:9200/_cluster/state?pretty" # 集群统计 curl -X GET "localhost:9200/_cluster/stats?pretty" # 节点信息 curl -X GET "localhost:9200/_nodes?pretty" curl -X GET "localhost:9200/_nodes/stats?pretty" # 分片分配 curl -X GET "localhost:9200/_cat/shards?v" curl -X GET "localhost:9200/_cat/allocation?v" ``` ### Cat API ```bash # 常用 cat 命令 curl -X GET "localhost:9200/_cat/health?v" curl -X GET "localhost:9200/_cat/nodes?v" curl -X GET "localhost:9200/_cat/indices?v" curl -X GET "localhost:9200/_cat/shards?v" curl -X GET "localhost:9200/_cat/segments?v" curl -X GET "localhost:9200/_cat/count?v" curl -X GET "localhost:9200/_cat/recovery?v" curl -X GET "localhost:9200/_cat/thread_pool?v" ``` ## 索引管理 ### 索引操作 ```bash # 创建索引 curl -X PUT "localhost:9200/my_index" -H 'Content-Type: application/json' -d' { "settings": { "number_of_shards": 3, "number_of_replicas": 1 }, "mappings": { "properties": { "title": { "type": "text" }, "content": { "type": "text" }, "timestamp": { "type": "date" }, "status": { "type": "keyword" } } } }' # 删除索引 curl -X DELETE "localhost:9200/my_index" # 查看索引 curl -X GET "localhost:9200/my_index?pretty" curl -X GET "localhost:9200/my_index/_mapping?pretty" curl -X GET "localhost:9200/my_index/_settings?pretty" # 索引别名 curl -X POST "localhost:9200/_alias...