Kubernetes installed on the cluster EFK log management, how to install searchguard on elasticsearch?

I entered the container, the direct implementation of bin / plugin install com.floragunn / search-guard-ssl / 2.1.1.5, will be an error.

  • Waited by another client. Waiting.
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  • How should this be installed?

    Or should it be done by dockerfile?

    Heads up! This alert needs your attention, but it's not super important.