Packer 1.8+ HTTP Provisioner: Latency When Concurrent Builds Run
Packer HTTP Provisioner Concurrency Issue The HTTP provisioner in Packer 1.8+ serves templates via a Go http.Server listening on localhost:55555 by default. When multiple builders are executed in parallel, they share the same listening port, which can create contention for incoming connections. This contention manifests as noticeable latency spikes in the bu