Elasticsearch磁盘占用大于95%时将所有索引置为只读问题

写入数据会在集群的日志文件中发现类似下面的错误

AuthorizationException: AuthorizationException(403, u'cluster_block_exception', u'blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];')

如果使用9300的tcp端口会出现类似下面的错误

TransportError(403, u'cluster_block_exception', u'blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];')

当Elasticsearch所在磁盘占用大于等于95%时，Elasticsearch会把所有相关索引自动置为只读。 详见Elasticsearch官方文档: https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-cluster.html#disk-based-shard-allocation

可以通过下面的api查看当前索引状态

curl -GET 'localhost:9200/index_name/_settings?pretty'

响应结果:

{
  "index_name" : {
    "settings" : {
      "index" : {
        "number_of_shards" : "5",
        "blocks" : {
          "read_only_allow_delete" : "true"