简介：es之索引别名的使⽤
别名有什么用
在开发中，随着业务需求的迭代，较⽼的业务逻辑就要⾯临更新甚⾄是重构，⽽对于es来说，为了适应新的业务逻辑，可能就要对原有的索引做⼀些修改，⽐如对某些字段做调整，甚⾄是重建索引。⽽做这些操作的时候，可能会对业务造成影响，甚⾄是停机调整等问题。由此，es提供了索引别名来解决这些问题。 索引别名就像⼀个快捷⽅式或是软连接，可以指向⼀个或多个索引，也可 以给任意⼀个需要索引名的API来使⽤。别名的应⽤为程序提供了极⼤地灵活性
查询别名
GET /nba/_aliasGET /_alias新增别名
POST /_aliases
{
"actions": [{
"add": {
"index": "nba",
"alias": "nba_v1.0"
}
}]
}PUT /nba/_alias/nba_v1.1删除别名
POST /_aliases
{
"actions": [{
"remove": {
"index": "nba",
"alias": "nba_v1.0"
}
}]
}DELETE /nba/_alias/nba_v1.1重命名
POST /_aliases
{
"actions": [{
"remove": {
"index": "nba",
"alias": "nba_v1.0"
}
},
{
"add": {
"index": "nba",
"alias": "nba_v2.0"
}
}
]
}为多个索引指定⼀个别名
POST /_aliases
{
"actions": [{
"add": {
"index": "nba",
"alias": "national_player"
}
},
{
"add": {
"index": "wnba",
"alias": "national_player"
}
}
]
}为同个索引指定多个别名
POST /_aliases
{
"actions": [{
"add": {
"index": "nba",
"alias": "nba_v2.1"
}
},
{
"add": {
"index": "nba",
"alias": "nba_v2.2"
}
}
]
}通过别名读索引
- 当别名指定了⼀个索引，则查出⼀个索引
GET /nba_v2.1- 当别名指定了多个索引，则查出多个索引
GET /national_player通过别名写索引
- 当别名指定了⼀个索引，则可以做写的操作
POST /nba_v2.1/_doc/566
{
"countryEn": "Croatia",
"teamName": "快船",
"birthDay": 858661200000,
"country": "克罗地亚",
"teamCityEn": "LA",
"code": "ivica_zubac",
"displayAffiliation": "Croatia",
"displayName": "伊维察 祖巴茨哥哥",
"schoolType": "",
"teamConference": "⻄部",
"teamConferenceEn": "Western",
"weight": "108.9 公⽄",
"teamCity": "洛杉矶",
"playYear": 3,
"jerseyNo": "40",
"teamNameEn": "Clippers",
"draft": 2016,
"displayNameEn": "Ivica Zubac",
"heightValue": 2.16,
"birthDayStr": "1997-03-18",
"position": "中锋",
"age": 22,
"playerId": "1627826"
}- 当别名指定了多个索引，可以指定写某个索引
POST /_aliases
{
"actions": [{
"add": {
"index": "nba",
"alias": "national_player",
"is_write_index": true
}
},
{
"add": {
"index": "wnba",
"alias": "national_player"
}
}
]
}POST /national_player/_doc/566
{
"countryEn": "Croatia",
"teamName": "快船",
"birthDay": 858661200000,
"country": "克罗地亚",
"teamCityEn": "LA",
"code": "ivica_zubac",
"displayAffiliation": "Croatia",
"displayName": "伊维察 祖巴茨妹妹",
"schoolType": "",
"teamConference": "⻄部",
"teamConferenceEn": "Western",
"weight": "108.9 公⽄",
"teamCity": "洛杉矶",
"playYear": 3,
"jerseyNo": "40",
"teamNameEn": "Clippers",
"draft": 2016,
"displayNameEn": "Ivica Zubac",
"heightValue": 2.16,
"birthDayStr": "1997-03-18",
"position": "中锋",
"age": 22,
"playerId": "1627826"
}