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[PR #87] [MERGED] Implement rootless Docker container with enhanced security and preserved TFTP logging #215

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opened 2026-03-01 18:33:49 +03:00 by kerem · 0 comments

kerem commented

2026-03-01 18:33:49 +03:00

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📋 Pull Request Information

Original PR: https://github.com/netbootxyz/docker-netbootxyz/pull/87
Author: @antonym
Created: 6/8/2025
Status: ✅ Merged
Merged: 6/12/2025
Merged by: @antonym

Base: master ← Head: feature/rootless-container-security

📝 Commits (3)

0a9993a Implement rootless Docker container with preserved TFTP logging
84db3c6 Update Dockerfile
741467c Update root/init.sh

📊 Changes

7 files changed (+203 additions, -51 deletions)

View changed files

➕ .dockerignore (+59 -0)
📝 Dockerfile (+67 -30)
📝 README.md (+21 -0)
📝 root/etc/supervisor.conf (+12 -16)
📝 root/init.sh (+29 -3)
📝 root/start.sh (+5 -2)
➕ root/usr/local/bin/dnsmasq-wrapper.sh (+10 -0)

📄 Description

Summary

Converts docker-netbootxyz container to run all processes as non-root user for enhanced security
Preserves TFTP logging functionality for PXE boot debugging
Adds customizable PUID/PGID support for volume permission management

Key Security Improvements

✅ All application processes (nginx, webapp, dnsmasq) run as nbxyz user (UID 1000)
✅ Privilege dropping using gosu for secure initialization
✅ Only supervisord initialization runs as root, then drops privileges
✅ Configurable user/group IDs via PUID/PGID environment variables
✅ Proper permission management for all service directories

Performance Optimizations

✅ Multi-stage Docker build reduces image size and improves caching
✅ Optimized package installation and cleanup
✅ Better layer organization for faster rebuilds

TFTP Logging Preservation

✅ TFTP request logs appear in docker logs output for debugging
✅ dnsmasq configured with --log-dhcp --log-queries --log-facility=-
✅ Wrapper script ensures proper log forwarding to container stdout
✅ Users can monitor PXE boot requests in real-time

Breaking Changes

None - fully backward compatible

Test Plan

Container builds successfully
All services start and run as non-root user
Web interface accessible on ports 80 and 3000
TFTP server listening on port 69/udp
TFTP transaction logs visible in docker logs
PUID/PGID customization works correctly
Volume permissions handled properly

Files Changed

Dockerfile - Multi-stage build optimization and security enhancements
root/init.sh - Dynamic user creation with PUID/PGID support
root/start.sh - Privilege dropping with gosu
root/etc/supervisor.conf - Rootless process management
root/usr/local/bin/dnsmasq-wrapper.sh - TFTP logging wrapper (new file)
root/defaults/nginx.conf - Non-root nginx configuration

🤖 Generated with Claude Code

_{🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.}

## 📋 Pull Request Information **Original PR:** https://github.com/netbootxyz/docker-netbootxyz/pull/87 **Author:** [@antonym](https://github.com/antonym) **Created:** 6/8/2025 **Status:** ✅ Merged **Merged:** 6/12/2025 **Merged by:** [@antonym](https://github.com/antonym) **Base:** `master` ← **Head:** `feature/rootless-container-security` --- ### 📝 Commits (3) - [`0a9993a`](https://github.com/netbootxyz/docker-netbootxyz/commit/0a9993a767f57a63964f8b2cfe67a4fd59644e4b) Implement rootless Docker container with preserved TFTP logging - [`84db3c6`](https://github.com/netbootxyz/docker-netbootxyz/commit/84db3c67cbd5d22b638129ad6ccf0598df3ed8a4) Update Dockerfile - [`741467c`](https://github.com/netbootxyz/docker-netbootxyz/commit/741467c6d0f758ece39871b4912e99e23d8e09e2) Update root/init.sh ### 📊 Changes **7 files changed** (+203 additions, -51 deletions) <details> <summary>View changed files</summary> ➕ `.dockerignore` (+59 -0) 📝 `Dockerfile` (+67 -30) 📝 `README.md` (+21 -0) 📝 `root/etc/supervisor.conf` (+12 -16) 📝 `root/init.sh` (+29 -3) 📝 `root/start.sh` (+5 -2) ➕ `root/usr/local/bin/dnsmasq-wrapper.sh` (+10 -0) </details> ### 📄 Description ## Summary - Converts docker-netbootxyz container to run all processes as non-root user for enhanced security - Preserves TFTP logging functionality for PXE boot debugging - Adds customizable PUID/PGID support for volume permission management ## Key Security Improvements - ✅ All application processes (nginx, webapp, dnsmasq) run as `nbxyz` user (UID 1000) - ✅ Privilege dropping using `gosu` for secure initialization - ✅ Only supervisord initialization runs as root, then drops privileges - ✅ Configurable user/group IDs via `PUID`/`PGID` environment variables - ✅ Proper permission management for all service directories ## Performance Optimizations - ✅ Multi-stage Docker build reduces image size and improves caching - ✅ Optimized package installation and cleanup - ✅ Better layer organization for faster rebuilds ## TFTP Logging Preservation - ✅ TFTP request logs appear in `docker logs` output for debugging - ✅ dnsmasq configured with `--log-dhcp --log-queries --log-facility=-` - ✅ Wrapper script ensures proper log forwarding to container stdout - ✅ Users can monitor PXE boot requests in real-time ## Breaking Changes None - fully backward compatible ## Test Plan - [x] Container builds successfully - [x] All services start and run as non-root user - [x] Web interface accessible on ports 80 and 3000 - [x] TFTP server listening on port 69/udp - [x] TFTP transaction logs visible in `docker logs` - [x] PUID/PGID customization works correctly - [x] Volume permissions handled properly ## Files Changed - `Dockerfile` - Multi-stage build optimization and security enhancements - `root/init.sh` - Dynamic user creation with PUID/PGID support - `root/start.sh` - Privilege dropping with gosu - `root/etc/supervisor.conf` - Rootless process management - `root/usr/local/bin/dnsmasq-wrapper.sh` - TFTP logging wrapper (new file) - `root/defaults/nginx.conf` - Non-root nginx configuration 🤖 Generated with [Claude Code](https://claude.ai/code) --- <sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>

kerem

2026-03-01 18:33:49 +03:00

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