elasticsearch-数据的分配路由.md

Elasticsearch数据的分配路由

一、简介

二、索引分片的路由分配

2、给节点打上标签

elasticsearch.yml

node.attr.size: medium

或启动命令

./bin/elasticsearch -Enode.attr.size=medium

3.

PUT test/_settings
{
  "index.routing.allocation.include.size": "big",
  "index.routing.allocation.include.rack": "rack1"
}

4.

](https://github.com/elastic/elasticsearch/edit/7.5/docs/reference/index-modules/allocation/filtering.asciidoc)

• index.routing.allocation.include.{attribute}`**

  Assign the index to a node whose {attribute} has at least one of the comma-separated values.

• index.routing.allocation.require.{attribute}

  Assign the index to a node whose {attribute} has all of the comma-separated values.

• index.routing.allocation.exclude.{attribute}

  Assign the index to a node whose {attribute} has none of the comma-separated values.

内置的attribute：

_name	Match nodes by node name
_host_ip	Match nodes by host IP address (IP associated with hostname)
_publish_ip	Match nodes by publish IP address
_ip	Match either _host_ip or _publish_ip
_host	Match nodes by hostname
_id	Match nodes by node id

PUT test/_settings
{
  "index.routing.allocation.include._ip": "192.168.2.*"
}

5.

PUT loginmac-201905/_settings
{
  "index": {
    "routing": {
      "allocation": {
        "require": {
          "box_type": "warm"
        }
      }
    }
  }
}

6.

POST /_cluster/reroute
{
  "commands": [
    {
      "move": {
        "index": "loginmac-201905",
        "shard": 2,
        "from_node": "node-248",
        "to_node": "node-12"
      }
    }
  ]
}

参考

1. https://www.elastic.co/guide/en/elasticsearch/reference/7.5/shard-allocation-filtering.html