弹性搜索：在关闭数据节点之前撤出所有数据？ [英] Elasticsearch: evacuate all data before shutdown of a data node?

问题描述

有没有办法告诉一个节点删除所有的数据（在其他节点之间传播它），以便我可以关闭它，一旦它下来就不会处理重新平衡/重新复制？

如果我有每个分片的2个副本，并且我放弃一个节点，则某些分片现在只有一个实时副本，必须重新复制。如果可以，我宁愿不下降到一个实时拷贝。

解决方案

发布到ES邮件列表，我被告知正确的答案在于_cluster / settings api，具体来说是cluster.routing.allocation.exclude._ip选项。

从文档： http://www.elasticsearch.org/guide/en /elasticsearch/reference/current/modules-cluster.html

  curl -XPUT localhost：9200 / _cluster / settings -d'{
transient：{
cluster.routing.allocation.exclude._ip：10.0.0.1
} 
}'
  

IP地址可以是逗号分隔的列表。要排除，只需从列表中删除IP（或将列表设置为以删除所有排除的IP）。

希望这可以帮助其他人寻找这个问题的答案。

Is there a way to tell a node to remove all of its data (spread it back out among the other nodes) so that I can shut it down and not deal with a rebalance/re-replicate once its down?

If I have 2 copies of each shard, and I drop one node, some of the shards now only have 1 live copy and it has to be re-replicated. I'd prefer to not drop down to 1 live copy for any period of time if I can.

解决方案

After posting to the ES mailing list, I was informed the proper answer lies in the _cluster/settings api, specifically the cluster.routing.allocation.exclude._ip option.

From the docs: http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-cluster.html

curl -XPUT localhost:9200/_cluster/settings -d '{
  "transient" : {
    "cluster.routing.allocation.exclude._ip" : "10.0.0.1"
  }
}'

The IP address can be a comma separated list. To 'un-exclude', just remove the IP from the list (or set the list to "" to remove all excluded IPs).

Hopefully this helps others looking for the answer to this same question.

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