elasticsearch 索引管理

如果你想禁止自动创建索引，你可以通过在 config/elasticsearch.yml 的每个节点下添加下面的配置：
2.0版本
action.auto_create_index: false

索引管理

创建索引

curl -X PUT "localhost:9200/dev_employee_20181221"

WKQ@WKQ-PC MINGW64 /d/WorkSpaces
$ curl -X PUT "localhost:9200/dev_employee_20181219"
{"acknowledged":true,"shards_acknowledged":true,"index":"dev_employee_20181219"}

删除索引

// 删除一个
curl -X DELETE "localhost:9200/dev_employee_20181221"

// 删除多个
curl -X DELETE "localhost:9200/dev_employee_20181220,dev_employee_20181221"
curl -X DELETE "localhost:9200/dev_employee_*"

// 删除所有
curl -X DELETE "localhost:9200/_all"
curl -X DELETE "localhost:9200/*"

WKQ@WKQ-PC MINGW64 /d/WorkSpaces
$ curl -X DELETE "localhost:9200/dev_employee_20181219"
{"acknowledged":true}

索引设置

number_of_shards 每个索引的主分片数，默认值是 5 。这个配置在索引创建后不能修改。

number_of_replicas 每个主分片的副本数，默认值是 1 。对于活动的索引库，这个配置可以随时修改。

curl -X PUT "localhost:9200/my_temp_index" -H 'Content-Type: application/json' -d'
{
    "settings": {
        "number_of_shards" :   1,
        "number_of_replicas" : 0
    }
}
'

curl -X PUT "localhost:9200/my_temp_index/_settings" -H 'Content-Type: application/json' -d'
{
    "number_of_replicas": 1
}
'

配置分词器

curl -X PUT "localhost:9200/spanish_docs" -H 'Content-Type: application/json' -d'
{
    "settings": {
        "analysis": {
            "analyzer": {
                "es_std": {
                    "type":      "standard",
                    "stopwords": "_spanish_"
                }
            }
        }
    }
}
'

curl -X GET "localhost:9200/spanish_docs/_analyze?analyzer=es_std" -H 'Content-Type: application/json' -d'
El veloz zorro marrón
'

创建索引 curl -X PUT "localhost:9200/dev_employee_20181221"

WKQ@WKQ-PC MINGW64 /d/WorkSpaces
$ curl -X PUT "localhost:9200/dev_employee_20181221"
{"acknowledged":true,"shards_acknowledged":true,"index":"dev_employee_20181221"}

给索引添加别名 curl -X PUT "localhost:9200/dev_employee_20181221/_alias/dev_employee"

WKQ@WKQ-PC MINGW64 /d/WorkSpaces
$   curl -X PUT "localhost:9200/dev_employee_20181221/_alias/dev_employee"
{"acknowledged":true}

检测这个别名指向哪些索引 同一别名多个索引 curl -X GET "localhost:9200/*/_alias/dev_employee"

WKQ@WKQ-PC MINGW64 /d/WorkSpaces
$ curl -X GET "localhost:9200/*/_alias/dev_employee"
{"dev_employee_20181221":{"aliases":{"dev_employee":{}}},"dev_employee_20181220":{"aliases":{"dev_employee":{}}}}

哪些别名指向这个索引 一个索引多个别名 curl -X GET "localhost:9200/dev_employee_20181221/_alias/*"

WKQ@WKQ-PC MINGW64 /d/WorkSpaces
$ curl -X GET "localhost:9200/dev_employee_20181221/_alias/*"
{"dev_employee_20181221":{"aliases":{"dev_employee":{},"sit_employee":{}}}}

索引添加别名、 索引删除别名、 索引修改别名(索引不变，别名变了)、 索引切换(别名不变，索引换了)

curl -X POST "localhost:9200/_aliases" -H 'Content-Type: application/json' -d'
{
  "actions": [
	  { "remove": { "index": "dev_employee_20181220", "alias": "dev_employee" }},
	  { "add":    { "index": "dev_employee_20181221", "alias": "dev_employee" }}
  ]
}
'

#索引添加别名
curl -X POST "localhost:9200/_aliases" -H 'Content-Type: application/json' -d'
{
  "actions": [
	  { "add":    { "index": "dev_employee_20181221", "alias": "dev_employee" }}
  ]
}
' 

#索引删除别名
curl -X POST "localhost:9200/_aliases" -H 'Content-Type: application/json' -d'
{
  "actions": [
	  { "remove": { "index": "dev_employee_20181220", "alias": "dev_employee" }}
  ]
}
'

#索引修改别名
WKQ@WKQ-PC MINGW64 /d/WorkSpaces                                                            
$ curl -X POST "localhost:9200/_aliases" -H 'Content-Type: application/json' -d'                       
 {                                                                                                    
     "actions": [                                                                                     
         { "remove": { "index": "dev_employee_20181220", "alias": "dev_employee" }},                  
         { "add":    { "index": "dev_employee_20181220", "alias": "dev_employee_backup" }}                   
     ]                                                                                                
 }                                                                                                    
 '                                                                                                    
{"acknowledged":true}


#索引切换(别名不变，索引换了) 
WKQ@WKQ-PC MINGW64 /d/WorkSpaces                                                            
$ curl -X POST "localhost:9200/_aliases" -H 'Content-Type: application/json' -d'                       
 {                                                                                                    
     "actions": [                                                                                     
         { "remove": { "index": "dev_employee_20181220", "alias": "dev_employee" }},                  
         { "add":    { "index": "dev_employee_20181221", "alias": "dev_employee" }}                   
     ]                                                                                                
 }                                                                                                    
 '                                                                                                    
{"acknowledged":true}

参考资料

[1] elasticsearch-2.0-索引管理
[2] elasticsearch-6.0-index-modules
[3] elasticsearch-8.6-ilm-actions