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Add Red Hat UBI-based Dockerfile #1

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@tamalsaha tamalsaha commented Jan 8, 2026 •
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Summary

Add a UBI 10 (Red Hat Universal Base Image) based Dockerfile for enterprise environments that require RHEL-compatible container images.

Changes

  • Uses registry.access.redhat.com/ubi10/ubi:latest as the base image
  • Chromium: Uses Chrome for Testing headless shell from Google (EPEL Chromium requires pipewire which is unavailable in UBI 10)
  • LibreOffice: Installs from official RPM distribution (not available in EPEL 10 or UBI 10 repos)
  • Java: Uses Java 21 OpenJDK headless (UBI 10 doesn't have Java 17, removed jlink stage)
  • QPDF: Installs pre-built binary from GitHub releases (not in EPEL 10)
  • tini: Installs from upstream GitHub release (not in EPEL 10)
  • ExifTool: Installed via perl-Image-ExifTool from EPEL

Package Differences from Debian

Component Debian UBI 10
Base debian:13-slim registry.access.redhat.com/ubi10/ubi:latest
Package Manager apt dnf
Chromium chromium (Debian repos) Chrome for Testing headless shell
LibreOffice libreoffice (trixie-backports) Official RPM from documentfoundation.org
Java default-jdk-headless + jlink java-21-openjdk-headless
QPDF qpdf (Debian repos) Pre-built binary from GitHub
tini tini (Debian repos) Binary from GitHub releases

Testing

# Build the image
docker build --network=host -f build/Dockerfile.ubi -t gotenberg:ubi .

# Run the container
docker run --rm -p 3000:3000 gotenberg:ubi /usr/bin/gotenberg

Verified Components

  • ✅ Gotenberg server starts successfully
  • ✅ All modules loaded: api, chromium, exiftool, libreoffice, libreoffice-api, libreoffice-pdfengine, logging, pdfcpu, pdfengines, pdftk, prometheus, qpdf, webhook
  • ✅ LibreOffice version: 25.2.7.2
  • ✅ Chrome headless shell: stable release
  • ✅ PDF engines: pdftk, qpdf (12.2.0), pdfcpu, exiftool
  • ✅ Image size: 2.7GB

Notes

  • The --network=host flag may be needed during build to resolve EPEL mirrors
  • OpenShift arbitrary user ID support is included (via usermod -aG root gotenberg)

@tamalsaha
feat: add UBI 10 based Dockerfile
c42fe5b 
- Uses registry.access.redhat.com/ubi10/ubi:latest as base image
- Installs Chrome for Testing headless shell (EPEL Chromium requires unavailable pipewire)
- Installs LibreOffice from official RPM distribution (not in EPEL 10)
- Installs QPDF from pre-built binary (not in EPEL 10)
- Installs Java 21 OpenJDK headless (UBI 10 doesn't have Java 17)
- Installs tini from upstream release (not in EPEL 10)
- Installs perl-Image-ExifTool for PDF metadata operations
- All PDF engines verified: pdftk, qpdf, pdfcpu, exiftool
- Tested: gotenberg server starts successfully with all modules

Signed-off-by: Tamal Saha <tamal@appscode.com>
@tamalsaha tamalsaha mentioned this pull request Jan 8, 2026
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