Add option to trace eureka registration in v3 #592
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Depends upon zowe/zlux-app-server#336
v2 version of #591
This PR adds the property components.app-server.node.mediationLayer.traceTls
It is used to set enableTrace from the NodeJS TLS level https://nodejs.org/api/tls.html#tlscreateserveroptions-secureconnectionlistener
This is needed because it seems to be the only way to get handshake tracing for NodeJS.
There's a previous property, components.app-server.node.https.enableTrace but it is only for inbound request from clients.
This new property allows you to trace the connection this server gives out to the discovery server, as an outbound request instead.
This can reveal the cause of low level networking issues if they arise.
How to test
Enabling components.app-server.node.mediationLayer.traceTls will show plenty of TLS handshake information during eureka registration. With it off (default), you should notice nothing different.