I am deploying a microservices - based application using an orchestrator (Rancher specifically).

During the service upgrade (when new images are being pulled and services re-discover one another), there is a small service outage.

What is the best / recommended way to measure the downtime?

I am performing e.g. a

watch -n1 'wget --spider http://some.endpoint.whoa'

but I want to time the duration of e.g. 502 responses.

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