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For rsync specifically, measure health/reachability of target clusters.
Tracing
Istio provides some tracing support, but it appears rudimentary (no detailed spans for EMCO related operations).
Preliminary guidelines:
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a starting point for tracing by creating a trace for each request in the sidecars. But this is insufficient as it does not include the outgoing requests made during an inbound request. What we'd like to see is a complete trace of, for example, an instantiate request to the orchestrator that includes the requests made to any controllers, etc.
In order to do this it is necessary to pass the tracing headers from the inbound request through to any outbound requests. This will be done with the https://opentelemetry.io/ golang libraries.
Logging
Each log message must contain the timestamp and identifying information describing the resource, such as project, composite application, etc. in case of orchestration.
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