alias 索引别名操作

旧城等待， 2022-11-15 11:50 254阅读 0赞

# alias 索引别名 #

### 查询别名 ###

# 查询指定索引别名
    curl -X GET "localhost:9200/nba/_alias"
    
    { 
      "nba" : { 
        "aliases" : {  }
      }
    }
    
    
    # 查询所有索引别名
    curl -X GET "localhost:9200/_alias"
    
    { 
      "nba" : { 
        "aliases" : {  }
      },
      "cba" : { 
        "aliases" : {  }
      }
    }

### 新增别名 ###

# 新增别名 nab -> nba_v1.0
    curl -H "Content-Type: application/json" -X POST 'http://localhost:9200/_aliases' -d ' { "actions": [ {"add": {"index": "nba", "alias": "nba_v1.0"}} ] }'
    
    # 返回
    { "acknowledged":true}
    
    # 再次查别名
    curl -X GET "localhost:9200/nba/_alias"
    { 
      "nba" : { 
        "aliases" : { 
          "nba_v1.0" : {  }
        }
      }
    }

### 删除别名 ###

curl -H "Content-Type: application/json" -X POST 'http://localhost:9200/_aliases' -d ' { "actions": [ {"remove": {"index": "nba", "alias": "nba_v1.0"}} ] }'

### 重命名一个别名 ###

# 先创建一个别名nba_v1.0
    curl -H "Content-Type: application/json" -X POST 'http://localhost:9200/_aliases' -d ' { "actions": [ {"add": {"index": "nba", "alias": "nba_v1.0"}} ] }'
        
    # 将nba_v1.0 改为 nba_v2.0
    # 先删除,再新增
    curl -H "Content-Type: application/json" -X POST 'http://localhost:9200/_aliases' -d ' { "actions": [ {"remove": {"index": "nba", "alias": "nba_v1.0"}}, {"add": {"index": "nba", "alias": "nba_v2.0"}} ] }'

### 给多个索引指定一个别名 ###

# 比如给nba,cba索引 ,都是basketball的索引名
    # 那就指定两个add
    
    curl -H "Content-Type: application/json" -X POST 'http://localhost:9200/_aliases' -d ' { "actions": [ {"add": {"index": "nba", "alias": "basketball"}}, {"add": {"index": "cba", "alias": "basketball"}} ] }'
        
        
    # 查询
    curl -X GET "localhost:9200/nba,cba/_alias?pretty"
    
    { 
      "nba" : { 
        "aliases" : { 
          "basketball" : {  },
          "nba_v2.0" : {  }
        }
      },
      "cba" : { 
        "aliases" : { 
          "basketball" : {  }
        }
      }
    }

### 同理,也可以一个索引指定多个别名 ###

curl -H "Content-Type: application/json" -X POST 'http://localhost:9200/_aliases' -d ' { "actions": [ {"add": {"index": "nba", "alias": "basketball_v1.0"}}, {"add": {"index": "nba", "alias": "basketball_v2.0"}} ] }'

### 通过别名,读操作 ###

# 如果别名指定了多个索引,会查询多个。

### 通过别名,写操作 ###

# 如果别名指定了多个索引，需要在创建别名的时候,指定写哪个索引
    # {"add": {"index": "nba", "alias": "basketball_v1.0","is_write_index":true}}
    # 只允许有一个有is_write_index这个标签
    
    curl -H "Content-Type: application/json" -X POST 'http://localhost:9200/_aliases' -d ' { "actions": [ {"add": {"index": "nba", "alias": "basketball_v1.0","is_write_index":true}}, {"add": {"index": "nba", "alias": "basketball_v2.0"}} ] }'
     
    
    # 再次查询别名信息的时候
    curl -X GET "localhost:9200/nba/_alias?pretty"
    { 
      "nba" : { 
        "aliases" : { 
          "basketball" : {  },
          "basketball_v1.0" : { 
            "is_write_index" : true
          },
          "basketball_v2.0" : {  },
          "nba_v2.0" : {  }
        }
      }
    }