# OBI v0.7.0 Adds HTTP Header Enrichment for Incident Triage

- Link: https://thestackobserver.com/obi-v0-7-0-adds-http-header-enrichment-for-incident-triage/
- Published: 2026-04-10T09:55:05-04:00
- Author: Stackxx

OpenTelemetry eBPF Instrumentation (OBI) v0.7.0 introduces **HTTP header enrichment**—
a capability that adds request context to traces without touching application code.
For incident responders, this means moving from error rate is up to this is isolated
to one customer cohort in seconds, dramatically reducing mean time to resolution
for customer-impacting incidents.

## The Incident Response Gap

Traces tell you something is wrong by showing latency spikes, error rates, and service
dependencies. The harder problem is figuring out _who_ is affected and _why_, quickly.
Header enrichment closes this gap by capturing request metadata—tenant IDs, user
segments, feature flags, and A/B test groups—that usually stays invisible to observability
systems because it only exists in HTTP headers.

The key advantage: this is purely a configuration change on OBI itself. No application
rebuilds, no redeployments, no code changes required. This makes it viable for immediate
deployment during active incidents when every minute matters.

## How It Works

OBI’s eBPF agent intercepts HTTP traffic at the kernel level using kprobes and tracepoints,
extracts configured headers, and attaches them as span attributes before the data
leaves the node. The configuration uses a policy-based approach with explicit include
and obfuscate rules:

 * Include rules specify which headers to capture and emit with spans
 * Obfuscate rules mask sensitive values while still recording header presence
 * Scope settings apply rules to requests, responses, or both
 * Case-insensitive matching prevents missing headers due to casing differences

The eBPF-based implementation adds minimal overhead since it operates entirely at
the kernel level without userspace interception or context switches.

## Security Considerations

The configuration supports header obfuscation for sensitive data. Headers like Authorization
or Cookie can be masked while still appearing in traces (shown as asterisks or custom
replacement strings), providing evidence that the header was present and had a value
without exposing credentials or session identifiers.

This balances observability needs with security requirements—teams can see that 
authentication was attempted without seeing the actual tokens.

## Practical Impact

With enriched spans, trace search can filter by http.request.header.x-tenant-id 
to identify affected cohorts instantly. This turns distributed traces from a diagnostic
tool into a debugging tool for customer-impacting incidents.

Example scenario: latency spikes in a multi-tenant service. Previously, you’d see
elevated latency across all spans but need to correlate with logs or database queries
to identify the affected tenant. With header enrichment, the tenant ID is in the
trace itself—filter by the header attribute and immediately see which tenant’s requests
are slow.

## Deployment

OBI v0.7.0 is available now from the GitHub releases page. For existing deployments,
upgrade the agent DaemonSet and apply the new configuration. New users can start
with the header enrichment demo in the repository to see an end-to-end working example.

## Scope and Limitations

Currently supported for HTTP/1.1 and HTTP/2 traffic. Header values are captured 
as string attributes—binary content or very large headers may be truncated. The 
feature is particularly valuable for microservices using header-based routing, multi-
tenant SaaS applications, and environments with extensive A/B testing.

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## Sources

 * [OBI HTTP Header Enrichment Announcement](https://opentelemetry.io/blog/2026/obi-http-header-enrichment/)
 * [OBI v0.7.0 Release](https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.7.0)
 * [OBI Setup Documentation](https://opentelemetry.io/docs/zero-code/obi/setup/)