es对索引修改主分片数

环境:
OS:Centos 7
es:es8.16.6
es7之后创建的index主分片是默认是1,计划修改成5

1.查看当前es索引的主分片数

[elasticsearch@localhost bin]$ curl -u elastic:elastic -X GET 'http://192.168.1.14:19200/_cat/indices?v'
health status index         uuid                   pri rep docs.count docs.deleted store.size pri.store.size dataset.size
green  open   metric_pl_new 3_P8iAEHTy-cgMhzh1uaig   1   1     100000            0     11.7mb          5.8mb        5.8mb

 

2.创建新的索引(指定分片数)
获取mapping
curl -u elastic:elastic -H "Content-Type: application/json" -XGET "http://192.168.1.14:19200/metric_pl_new/_mappings?pretty=true"
创建方法参考如下链接:
https://www.cnblogs.com/hxlasky/p/19690057

 

3.查看新创建好的索引

[elasticsearch@localhost bin]$ curl -u elastic:elastic -X GET 'http://192.168.1.14:19200/_cat/indices?v'
health status index            uuid                   pri rep docs.count docs.deleted store.size pri.store.size dataset.size
green  open   metric_pl_new    3_P8iAEHTy-cgMhzh1uaig   1   1     100000            0     11.7mb          5.8mb        5.8mb
green  open   metric_pl_new_01 RzapLOd_RkaK-kfCKLByFQ   5   1          0            0      2.2kb          1.1kb        1.1kb

 

4.旧索引设置为只读

curl -u elastic:elastic -H "Content-Type: application/json" -XPUT 'http://192.168.1.14:19200/metric_pl_new/_settings' -d '{
"index.blocks.write": true
}'

 

5._reindex

curl -u elastic:elastic -XPOST -H "Content-Type: application/json" 'http://192.168.1.14:19200/_reindex' -d '
{"source": {"index": "metric_pl_new","size": 10000},"dest": {"index": "metric_pl_new_01"}
}'

 

刷新新索引
curl -u elastic:elastic -H "Content-Type: application/json" -XPOST 'http://192.168.1.14:19200/metric_pl_new_01/_refresh?pretty'

查看新旧索引的记录数是否一致

[elasticsearch@localhost bin]$ curl -u elastic:elastic -X GET 'http://192.168.1.14:19200/_cat/indices?v'
health status index            uuid                   pri rep docs.count docs.deleted store.size pri.store.size dataset.size
green  open   metric_pl_new    3_P8iAEHTy-cgMhzh1uaig   1   1     100000            0     11.7mb          5.8mb        5.8mb
green  open   metric_pl_new_01 RzapLOd_RkaK-kfCKLByFQ   5   1     100000            0     12.1mb            6mb          6mb

 

6.创建别名

删除原来的index
curl -u elastic:elastic -XDELETE "192.168.1.14:19200/metric_pl_new"

 

创建别名指向原来的索引(应用程序不需要修改程序)

curl -u elastic:elastic -XPOST "192.168.1.14:19200/_aliases" -H 'Content-Type: application/json' -d '{"actions": [{ "add": { "index": "metric_pl_new_01", "alias": "metric_pl_new" } }]
}'

 

7.查看别名

[elasticsearch@localhost bin]$ curl -u elastic:elastic 'http://192.168.1.14:19200/_cat/aliases?v'
alias         index            filter routing.index routing.search is_write_index
.security     .security-7      -      -             -              -
metric_pl_new metric_pl_new_01 -      -             -              -