Persistent Cluster Update Settings not work

Elastic Stack Elasticsearch
1

Hi.

I have a question about "Cluster Update Settings" in the reference:
https://www.elastic.co/guide/en/elasticsearch/reference/5.3/cluster-update-settings.html

I create a 2-node cluster and write some data into it. The shards of index is distributed across two nodes.
Then I put a persistent setting to the cluster to exclude one node.

curl -XPUT http://1.1.1.1:18437/_cluster/settings?pretty -d '
{
  "persistent" : {
    "cluster.routing.allocation.exclude._ip": "1.1.1.1"
  }
}'

It doesn't work, and the shards of node 1.1.1.1 are still there and not reallocated.
When I put the following transient setting, it works:

curl -XPUT http://1.1.1.1:18437/_cluster/settings?pretty -d '
{
  "transient" : {
    "cluster.routing.allocation.exclude._ip": "1.1.1.1"
  }
}'

I am afraid of losing my settings in case the whole cluster restart, so I want to put my settings in persistent module. why doesn't persistent cluster setting working like transient settings?

my elasticsearch version is 5.0.0

Any help would be appreciated!

2

That is bad, please see Important Configuration Changes | Elasticsearch: The Definitive Guide [2.x] | Elastic

What's the point of putting that in as persistent? If you want there to be no shards on that node, do a transient setting and then remove the node entirely/

3

We create a 2-node cluster just for testing. In production environment, we have more nodes.

I'm worrying that the setting is lost when the whole cluster restart. BTW, why persistent setting not work?

4

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