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  • Apply sysctl before systemd: a lesson from reserving ephemeral ports too late

    calendar Aug 1, 2026 · 7 min read · Linux Network Bottlerocket  ·
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    We run an OpenTelemetry Collector (otel-collector) as a systemd service on Bottlerocket. Its Prometheus metrics endpoint was configured on port 51000, which falls inside the default Linux ephemeral port range. On a small portion of EC2 instances, the otel-collector kept restarting, failing to bind with EADDRINUSE. …


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Peng Zhang

Software Engineer

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