es_post_索引_405

问题:

 POST 提示不支持，如下
curl -XPOST 192.168.100.121:19101/testaii -d "{'a':'b'}"

{"error":"Incorrect HTTP method for uri [/testaii] and method [POST], allowed: [GET, HEAD, DELETE, PUT]","status":405}

分析过程:

       _cat/indics?
返回为yellow ，查看master磁盘90%以上使用，
推断: 磁盘问题，调整磁盘上限 

调整方式:
 curl -H "Content-Type: application/json"  -XPUT "192.168.101.121:19101/_cluster/settings" -d '{"transient": {"cluster.routing.allocation.disk.watermark.low": "92%","cluster.info.update.interval": "1m"}}'|jq "."
curl -H "Content-Type: application/json"  -XPUT "192.168.101.121:19101/_cluster/settings" -d '{"transient": {"cluster.routing.allocation.disk.watermark.high": "98%","cluster.info.update.interval": "1m"}}'|jq "."

结果：调整后
介绍:      _cat/indics? 返回为green ， 但post 索引数据还是405 ，解决继续。
_post
https://www.elastic.co/guide/en/elasticsearch/reference/current/disk-allocator.html

Elasticsearch使用两个配置参数决定分片是否能存放到某个节点上。
cluster.routing.allocation.disk.watermark.low：控制磁盘使用的低水位。默认为85%，意味着如果节点磁盘使用超过85%，则ES不允许在分配新的分片。当配置具体的大小如80MB时，表示如果磁盘空间小于80MB不允许分配分片。
cluster.routing.allocation.disk.watermark.high：控制磁盘使用的高水位。默认为90%，意味着如果磁盘空间使用高于90%时，ES将尝试分配分片到其他节点。
上述两个配置可以使用API动态更新，ES每隔30s获取一次磁盘的使用信息，该值可以通过cluster.info.update.interval来设置。
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原文链接：https://blog.csdn.net/wangxiaofeng0010/article/details/77977497

cluster.routing.allocation.disk.watermark.low

Controls the low watermark for disk usage. It defaults to 85%, meaning that Elasticsearch will not allocate shards to nodes that have more than 85% disk used. It can also be set to an absolute byte value (like 500mb) to prevent Elasticsearch from allocating shards if less than the specified amount of space is available. This setting has no effect on the primary shards of newly-created indices but will prevent their replicas from being allocated.

cluster.routing.allocation.disk.watermark.high

Controls the high watermark. It defaults to 90%, meaning that Elasticsearch will attempt to relocate shards away from a node whose disk usage is above 90%. It can also be set to an absolute byte value (similarly to the low watermark) to relocate shards away from a node if it has less than the specified amount of free space. This setting affects the allocation of all shards, whether previously allocated or not.