This guide covers server-side Word-to-PDF conversion using OpenOffice in headless mode, with a practical sequence for installation, daemon setup, and output validation. It is a troubleshooting-oriented walkthrough based on real conversion pipelines where font packages, lock files, and process supervision caused inconsistent results. We will cover package setup, command execution, batch handling, and rendering pitfalls, then link to the deployment playbook for rollout controls.
Why this workflow still appears
Many teams inherit systems that depend on deterministic document output and cannot rewrite immediately. Headless conversion remains useful when isolated, monitored, and constrained.
Step 1: Install office packages and fonts
Conversion quality depends heavily on fonts. Missing fonts do not always throw hard errors. They often produce layout drift that only appears during manual review.
Step 2: Run a direct conversion test
1 | soffice --headless --convert-to pdf sample.docx --outdir /tmp |
Test with representative documents, not a trivial one-page sample.
Step 3: Design service model
Options:
- Execute one-off conversion command per document.
- Run supervised worker process that consumes queued jobs.
For moderate load, queue-based workers are easier to monitor and restart safely.
Step 4: Handle temp paths and lock files
Use dedicated working directories. Clear stale lock files between retries. Do not run all jobs in shared /tmp without namespacing.
Rendering issues to expect
- Font substitution changes line wrapping.
- Embedded images can shift due to decoder differences.
- Complex table layouts vary across office suite versions.
Operational caution
Treat conversion as an isolated service with clear resource limits. Batch jobs can spike memory and trigger cascading failures if they share resources with web workers.
Verification checklist
- Compare output against baseline templates.
- Validate file count and naming for batch jobs.
- Confirm worker restarts do not duplicate conversions.
FAQ
Is LibreOffice better for current systems?
Usually yes, but migration should include output comparison testing before switch.
How do I avoid stuck conversion processes?
Use supervision, timeouts, and explicit job-level retries with idempotent storage paths.
Can this run in containers?
Yes, but include fonts and locale packages explicitly.