elasticsearch6 设置分片数及副本数

2019独角兽企业重金招聘Python工程师标准>>>

有时，我们的ES集群小，或者是测试时，只启动一个es时，我们需要将分片数设小，副本数设为0。要不然集群一直是yellow状态。

elasticsearch.yml 里设置index.number_of_shards参数已经废弃，会报错：

[2018-03-26T13:34:41,435][WARN ][o.e.c.s.SettingsModule   ] [node-1] 
*************************************************************************************
Found index level settings on node level configuration.

Since elasticsearch 5.x index level settings can NOT be set on the nodes 
configuration like the elasticsearch.yaml, in system properties or command line 
arguments.In order to upgrade all indices the settings must be updated via the 
/${index}/_settings API. Unless all settings are dynamic all indices must be closed 
in order to apply the upgradeIndices created in the future should use index templates 
to set default values. 

Please ensure all required values are updated on all indices by executing: 

curl -XPUT 'http://localhost:9200/_all/_settings?preserve_existing=true' -d '{
  "index.number_of_replicas" : "0"
}'
*************************************************************************************

[2018-03-26T13:34:41,438][ERROR][o.e.b.Bootstrap          ] Exception
java.lang.IllegalArgumentException: node settings must not contain any index level settings
	at org.elasticsearch.common.settings.SettingsModule.(SettingsModule.java:128) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.node.Node.(Node.java:331) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.node.Node.(Node.java:246) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Bootstrap$5.(Bootstrap.java:213) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:213) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:323) [elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:121) [elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) [elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) [elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) [elasticsearch-cli-6.2.2.jar:6.2.2]
	at org.elasticsearch.cli.Command.main(Command.java:90) [elasticsearch-cli-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) [elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:85) [elasticsearch-6.2.2.jar:6.2.2]
[2018-03-26T13:34:41,443][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [node-1] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.IllegalArgumentException: node settings must not contain any index level settings
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:125) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.2.2.jar:6.2.2]
	at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:85) ~[elasticsearch-6.2.2.jar:6.2.2]
Caused by: java.lang.IllegalArgumentException: node settings must not contain any index level settings
	at org.elasticsearch.common.settings.SettingsModule.(SettingsModule.java:128) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.node.Node.(Node.java:331) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.node.Node.(Node.java:246) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Bootstrap$5.(Bootstrap.java:213) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:213) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:323) ~[elasticsearch-6.2.2.jar:6.2.2]
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:121) ~[elasticsearch-6.2.2.jar:6.2.2]
	... 6 more

所以我们根据提示，配置文件去掉这个参数，启动起来后，通过API设置：

[elklog@iZ2ze16gjdevwfzy53xejgZ logs]$ curl -XPUT 'http://localhost:9200/_all/_settings?preserve_existing=true' -d '{
>   "index.number_of_replicas" : "0"
> }'
{"error":"Content-Type header [application/x-www-form-urlencoded] is not supported","status":406}[elklog@iZ2ze16gjdevwfzy53xejgZ logs]$ 

看来还需要设置http头信息：

[elklog@iZ2ze16gjdevwfzy53xejgZ logs]$ curl -H "Content-Type: application/json" -XPUT 'http://localhost:9200/_all/_settings?preserve_existing=true' -d '{
>   "index.number_of_replicas" : "0"
> }'
{"acknowledged":true}

分片设置同理：

curl -H "Content-Type: application/json" -XPUT 'http://localhost:9200/_all/_settings?preserve_existing=true' -d '{
  "index.number_of_shards" : "1"
}'

 

转载于:https://my.oschina.net/haha256/blog/1784961