当您的机器磁盘空间不足时，通常会观察到此错误。 要避免此错误消息所遵循的步骤

Resetting the read-only index block on the index: $ curl -X PUT -H "Content-Type: application/json" http://127.0.0.1:9200/_all/_settings -d '{"index.blocks.read_only_allow_delete": null}' Response ${"acknowledged":true} Updating the low watermark to at least 50 gigabytes free, a high watermark of at least 20 gigabytes free, and a flood stage watermark of 10 gigabytes free, and updating the information about the cluster every minute Request $curl -X PUT "http://127.0.0.1:9200/_cluster/settings?pretty" -H 'Content-Type: application/json' -d' { "transient": { "cluster.routing.allocation.disk.watermark.low": "50gb", "cluster.routing.allocation.disk.watermark.high": "20gb", "cluster.routing.allocation.disk.watermark.flood_stage": "10gb", "cluster.info.update.interval": "1m"}}' Response ${ "acknowledged" : true, "persistent" : { }, "transient" : { "cluster" : { "routing" : { "allocation" : { "disk" : { "watermark" : { "low" : "50gb", "flood_stage" : "10gb", "high" : "20gb" } } } }, "info" : {"update" : {"interval" : "1m"}}}}}

运行这两个命令后，必须再次运行第一个命令，以使索引不会再次进入只读模式

仅使用以下命令更改设置在我的环境中不起作用:

curl -XPUT -H "Content-Type: application/json" http://localhost:9200/_all/_settings -d '{"index.blocks.read_only_allow_delete": null}'

我还必须运行强制合并API命令:

curl -X POST "localhost:9200/my-index-000001/_forcemerge?pretty"

参考:强制合并API

当您的机器磁盘空间不足时，通常会观察到此错误。 要避免此错误消息所遵循的步骤

Resetting the read-only index block on the index: $ curl -X PUT -H "Content-Type: application/json" http://127.0.0.1:9200/_all/_settings -d '{"index.blocks.read_only_allow_delete": null}' Response ${"acknowledged":true} Updating the low watermark to at least 50 gigabytes free, a high watermark of at least 20 gigabytes free, and a flood stage watermark of 10 gigabytes free, and updating the information about the cluster every minute Request $curl -X PUT "http://127.0.0.1:9200/_cluster/settings?pretty" -H 'Content-Type: application/json' -d' { "transient": { "cluster.routing.allocation.disk.watermark.low": "50gb", "cluster.routing.allocation.disk.watermark.high": "20gb", "cluster.routing.allocation.disk.watermark.flood_stage": "10gb", "cluster.info.update.interval": "1m"}}' Response ${ "acknowledged" : true, "persistent" : { }, "transient" : { "cluster" : { "routing" : { "allocation" : { "disk" : { "watermark" : { "low" : "50gb", "flood_stage" : "10gb", "high" : "20gb" } } } }, "info" : {"update" : {"interval" : "1m"}}}}}

运行这两个命令后，必须再次运行第一个命令，以使索引不会再次进入只读模式

从PostMan中删除只读设置

当Elasticsearch认为磁盘空间不足时，就会发生这种情况，因此它将自己设置为只读模式。

默认情况下，Elasticsearch的决定是基于空闲磁盘空间的百分比，因此在大磁盘上，即使您有许多gb的空闲空间，这种情况也会发生。

默认情况下，泛滥水位为95%，因此在1TB的驱动器上，您至少需要50GB的空闲空间，否则Elasticsearch将自己设置为只读模式。

有关洪水阶段水印的文档请参见https://www.elastic.co/guide/en/elasticsearch/reference/6.2/disk-allocator.html。

正确的解决方案取决于上下文——例如生产环境与开发环境。

解决方法1:释放磁盘空间

释放足够的磁盘空间，使磁盘的空闲空间超过5%，就可以解决这个问题。一旦有足够的磁盘空闲，Elasticsearch不会自动退出只读模式，你必须做一些类似这样的事情来解锁索引:

$ curl -XPUT -H "Content-Type: application/json" https://[YOUR_ELASTICSEARCH_ENDPOINT]:9200/_all/_settings -d '{"index.blocks.read_only_allow_delete": null}'

解决方案2:修改洪水水位设置

修改“cluster.routing.allocation.disk.watermark.水印”。Flood_stage”设置为其他内容。可以将其设置为较低的百分比或绝对值。下面是如何从文档中更改设置的示例:

PUT _cluster/settings
{
  "transient": {
    "cluster.routing.allocation.disk.watermark.low": "100gb",
    "cluster.routing.allocation.disk.watermark.high": "50gb",
    "cluster.routing.allocation.disk.watermark.flood_stage": "10gb",
    "cluster.info.update.interval": "1m"
  }
}

同样，在完成此操作后，您必须使用上面的curl命令来解锁索引，但在此之后，它们不应该再次进入只读模式。

ELK团队的一个很好的指南:

https://www.elastic.co/guide/en/elasticsearch/reference/master/disk-usage-exceeded.html

我用ELK 7.x就能做到