部署elk报错

部署elasticsearch

报错：

elasticsearch: OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.

elasticsearch: ERROR: [1] bootstrap checks failed

elasticsearch: [1]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured

解决：

The cluster coordination algorithm has changed in 7.0 516 and in order to be safe it requires some specific configuration. We relax that requirement (that is, we run in a less-safe mode) when you bind to localhost only, but if/when you change network.host we enforce that your configure the cluster safely.

This is covered in the breaking changes documentation 1.4k for 7.0

当在配置文件中的network.host中设置为localhost则es不会对安全模式进行强制，但是当network.host设置为0.0.0.0时，会要求强制设置安全模式。

可以使用设置discovery.seed_hosts: [] 进行跳过