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fix: LD_ASSUME_KERNEL for Docker 18.09 compatibility (Issue #508) #517

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fix: LD_ASSUME_KERNEL for Docker 18.09 compatibility (Issue #508) #517

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fix: LD_ASSUME_KERNEL for Docker 18.09 (Issue #508)
claw-mini-zz Mar 20, 2026
2164dd9
fix: LD_ASSUME_KERNEL for Docker 18.09 (Issue #508)
claw-mini-zz Mar 20, 2026
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3 changes: 3 additions & 0 deletions components/execd/bootstrap.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,9 @@ if ! touch "$EXECD_ENVS" 2>/dev/null; then
fi
export EXECD_ENVS

# Fix for Docker 18.09 / old glibc compatibility (Issue #508)
export LD_ASSUME_KERNEL=2.33.0
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P2 Badge Preserve caller-provided LD_ASSUME_KERNEL

This change unconditionally sets LD_ASSUME_KERNEL=2.33.0, which overwrites any value a caller passes in CreateSandboxRequest.env; sandbox containers always execute this script because Docker provisioning uses entrypoint=[BOOTSTRAP_PATH] in server/src/services/docker.py. In workloads that intentionally set a different LD_ASSUME_KERNEL (or need to disable it), the requested environment is ignored, which can cause runtime incompatibilities for those images. Treat this as a default-only value (set it only when unset) so explicit user configuration remains authoritative.

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echo "starting OpenSandbox Execd daemon at $EXECD."
$EXECD &

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3 changes: 3 additions & 0 deletions server/src/services/docker.py
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Expand Up @@ -1866,6 +1866,9 @@ def _build_labels_and_env(
if value is None:
continue
environment.append(f"{key}={value}")
# Fix for Docker 18.09 / old glibc compatibility (Issue #508)
# Force use of legacy clone() instead of clone3() for thread creation
environment.append("LD_ASSUME_KERNEL=2.33.0")
return labels, environment

def _resolve_image_auth(
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