Must be used in conjunction with the agent-side join_token plugin
The join_token plugin attests a node based on a pre-shared, one-time-use join token. A
token must be generated by the server before it can be used to attest a node.
The server uses the token to generate a SPIFFE ID with the form:
spiffe://<trust_domain>/spire/agent/join_token/<token>This plugin has no configuration options. Tokens may be generated through the
CLI utility (spire-server token generate) or through the CreateJoinToken RPC
of the SPIRE Server Agent API.