●Change8

Migrating to HAProxy v3.4-dev11

Version v3.4-dev11 introduces 1 breaking change. This guide details how to update your code.

Released: 5/8/2026

1
Breaking Changes
1
Migration Steps
24
Affected Symbols

⚠️ Check Your Code

If you use any of these symbols, you need to read this guide:

acmesinknet_helpervarshpackquicclimux-quich3/hq_interopaclmappatterngithubmux-h2http-anamworker/clihttp-fetchh1_htxhatermsslmux-h1jwsjwestick-table

Breaking Changes

●Issue #1

The `USE_OTEL` build option has been removed. The OpenTelemetry addon is now built using the `EXTRA_MAKE` option. To enable OpenTelemetry, you need to modify your build process to include it via `EXTRA_MAKE`.

Migration Steps

  1. 1
    Update build process to use `EXTRA_MAKE` for building the OpenTelemetry addon instead of the `USE_OTEL` option.

Release Summary

This release introduces an MPSC ring buffer, enhances QUIC and H2 support, and includes numerous bug fixes across various modules. Key new features include ACME EAB support and improved JWE/JWS capabilities.

Need More Details?

View the full release notes and all changes for HAProxy v3.4-dev11.

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