football/JOURNAL.md

KNEL-Football Development Journal

Project Overview

Building a secure Debian 13 ISO with strict Docker-only workflow for tier0 infrastructure access.

Critical Design Decisions

Docker-Only Workflow (AGENTS.md Compliance)

Decision: All build operations must run inside Docker containers. Why: Ensures reproducible builds, prevents host contamination, maintains strict security. Implementation:

• All operations via docker run
• Volumes mounted: /workspace (read-only), /build, /output, /tmp
• Host commands allowed: docker, git, virsh/libvirt only
• Final artifacts only written to host via volume mounts

File Ownership Strategy

Decision: Container must run as invoking user, not root. Why: Final ISO artifacts must be owned by user who invoked build, not root. Implementation:

• Dockerfile creates non-root builder user
• Docker run uses -u $(id -u):$(id -g) to map user IDs
• Volume mounts preserve ownership correctly

Build Artifact Separation

Decision: Strict separation of workspace, build, temp, and output directories. Why: Prevents clutter, maintains clean working directory, enables easy cleanup. Implementation:

• /workspace: Read-only source code and configs
• /build: Intermediate live-build files (stays in container volume)
• /tmp: Temporary files
• /output: Final artifacts (ISO, checksums) only
• .gitignore configured to ignore all build artifacts

Clean Working Directory

Decision: No intermediate files on host system. Why: Host system remains clean, no git pollution, easy to maintain. Implementation:

• All build files stay in Docker volumes
• Only final artifacts (ISO, checksums) written to host output/
• .gitignore excludes: output/, tmp/, .cache/, bootstrap/, binary/, etc.

Patterns and Best Practices

Volume Mounting Pattern

docker run --rm \
  -v "${SCRIPT_DIR}:/workspace:ro" \  # Source (read-only)
  -v "${OUTPUT_DIR}:/output" \        # Final artifacts
  -v "${BUILD_DIR}:/build" \         # Intermediate files
  -v "${BUILD_DIR}:/tmp" \           # Temp files
  -u "$(id -u):$(id -g)" \          # Preserve ownership
  "${DOCKER_IMAGE}" \
  command

Command Execution Pattern

All commands executed as:

./run.sh <command>

No direct Docker commands from user.

Error Handling Pattern

• set -euo pipefail in all scripts
• Container failures propagate to host
• Clean up on error with --rm flag

Lessons Learned

Issue 1: BASH_SOURCE Syntax Error

Problem: readonly SCRIPT_DIR declaration caused bash syntax error. Cause: Complex variable assignment with readonly declaration on same line. Solution: Declare variable first, then make readonly on separate line.

Issue 2: File Ownership in Containers

Problem: Files written by container owned by root. Cause: Docker containers default to root user. Solution: Use -u $(id -u):$(id -g) to run as invoking user.

Issue 3: Shellcheck Glob Expansion

Problem: shellcheck /workspace/src/*.sh failed with "does not exist". Cause: No files match glob, shell expands before container runs. Solution: Use find with print0 and xargs -0 for safe file handling.

Issue 4: BATS_TMPDIR Permissions

Problem: BATS couldn't write to /tmp inside container. Cause: /tmp directory permissions issue. Solution: Set BATS_TMPDIR=/build/tmp and ensure directory exists.

Current Implementation Status

✅ Completed

• Dockerfile with multi-stage build
• Root run.sh wrapper script
• Docker image built successfully (knel-football-dev:latest)
• Volume mounting strategy implemented
• User ownership preservation via UID/GID mapping

⚠️ In Progress

• ISO build command not yet added to run.sh
• Need to implement live-build execution inside container
• Hook scripts need path reference fixes (/build/src/ → /workspace/src/)

❌ Not Started

• Actual ISO generation
• ISO testing and validation
• Deployment package creation

Technical Debt

1. Shellcheck warnings in scripts (unused function parameters)
2. Hook scripts reference incorrect paths
3. BATS test library path configuration
4. No iso command in root run.sh

Next Steps

1. Add iso command to run.sh
2. Fix path references in hook scripts
3. Execute ISO build (30-60 minutes)
4. Validate final ISO artifact ownership

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This journal is append-only. Record all insights, decisions, and lessons learned.

2026-01-24: ISO Build Implementation

Change: Timezone Update

What: Changed TZ from UTC to America/Chicago in run.sh Why: User requested timezone change for build environment Impact: Affects shell and iso commands

Implementation: ISO Command Added

What: Added iso command to root run.sh script Why: Provides entry point for ISO generation following AGENTS.md requirements Implementation Details:

• All operations run inside Docker container
• Volume mounts: /workspace (read-only), /build (intermediate), /output (final artifacts)
• User ownership preservation: -u $(id -u):$(id -g) flag
• Final artifacts only: ISO, sha256, md5, BUILD-REPORT.txt
• Live-build configuration copied from /workspace/config
• Intermediate files stay in /build volume (no host clutter)
• Build timeout: 3600 seconds (1 hour)

Docker Workflow Compliance Verification

Checklist:

• ✅ All operations in Docker container
• ✅ Docker volumes used for file operations
• ✅ No directories created in /home
• ✅ No host system files modified
• ✅ Only final artifacts copied to output/
• ✅ File ownership preserved (invoking user, not root)
• ✅ Only docker/git/libvirt on host
• ✅ No working directory clutter (intermediate files in /build volume)

Usage Updated

What: Added iso command to usage function Why: Users need to know ISO build command is available Display: "iso Build ISO (30-60 minutes)"

Ready for ISO Build

Status: run.sh now complete with iso command Next: Execute ./run.sh iso to build ISO (30-60 minutes) Expected Output:

• output/knel-football-secure-v1.0.0.iso
• output/knel-football-secure-v1.0.0.iso.sha256
• output/knel-football-secure-v1.0.0.iso.md5
• output/BUILD-REPORT.txt
• All files owned by invoking user

2026-01-24: ISO Build Issues and Solutions

Issue 1: Root Privileges Required

Problem: Live-build requires root privileges inside container Error: "E: Root privileges needed!" Cause: Container running as non-root user via -u $(id -u):$(id -g) flag Conflict: AGENTS.md requires final artifacts owned by invoking user, not root

Solution: Run container as root for build, chown final artifacts Implementation:

• Remove -u $(id -u):$(id -g) from docker run
• Add chown command at end of build to correct ownership
• All intermediate operations still run in container volume
• Final artifacts ownership corrected before copy to host

Issue 2: Invalid Live-Build Option

Problem: Invalid value for LB_BINARY_FILESYSTEM Error: "E: You have specified an invalid value for LB_BINARY_FILESYSTEM" Cause: --binary-filesystem iso9660 not valid for Debian 13 live-build Research: Live-build options may have changed in newer versions

Solution: Remove problematic option, let live-build use defaults Implementation:

• Remove --binary-filesystem iso9660 from lb config
• Let live-build determine appropriate filesystem type
• Test with minimal options first

Revised Build Strategy

1. Run container as root (required for live-build)
2. All intermediate files stay in /build volume
3. Generate ISO and checksums
4. Chown final artifacts to invoking user's UID/GID
5. Copy to /output volume (maintains correct ownership)
6. Clean up intermediate files

Ownership Preservation Pattern

# Inside container (running as root)
# Build ISO...
lb build

# Get user IDs from environment or use default
USER_UID=${USER_UID:-1000}
USER_GID=${USER_GID:-1000}

# Chown final artifacts
chown "$USER_UID:$USER_GID" *.iso *.sha256 *.md5 BUILD-REPORT.txt

Next Actions

1. Update run.sh iso command to run as root
2. Pass UID/GID via environment variables
3. Remove invalid live-build options
4. Add chown step to preserve ownership
5. Re-run ISO build

2026-01-24: Final ISO Build Configuration

Changes Made

1. Timezone: Changed from UTC to America/Chicago (user request)
2. ISO Build Command: Added to root run.sh (calls src/run-new.sh iso)
3. Live-Build Options Fixed:
   • Removed invalid --binary-filesystem iso9660
   • Changed --debian-installer true to --debian-installer netinst
4. Ownership Preservation: Added USER_UID/USER_GID environment variables
5. Chown Step: Added final artifacts ownership correction

Docker Workflow Implementation

Root User Requirement: Live-build requires root privileges Solution:

• Container runs as root (no -u flag for iso command)
• UID/GID passed via environment variables
• Final artifacts chown-ed to correct user before copy
• Preserves ownership while satisfying live-build requirements

Final Implementation Architecture

run.sh (host wrapper)
  └─> src/run-new.sh (orchestrator)
      └─> docker run (container)
          └─> bash -c (inside container)
              ├─> lb config (configure)
              ├─> cp /workspace/config/* ./
              └─> lb build (generate ISO)
                  └─> chown $USER_UID:$USER_GID (correct ownership)
                      └─> cp /output/ (copy to host)

Volume Structure (Strict AGENTS.md Compliance)

• /workspace (read-only): Source code, configs
• /build: Intermediate live-build files (stays in container)
• /output: Final artifacts only (ISO, checksums, report)
• No intermediate files on host
• Final artifacts owned by invoking user

Build Status

✅ Docker image built and verified ✅ All scripts syntax-checked ✅ Volume mounting configured ✅ Ownership preservation implemented ✅ Timezone set to America/Chicago ✅ Ready for ISO build

Next: Execute ISO Build

Command: ./run.sh iso Estimated time: 30-60 minutes Expected output:

• output/knel-football-secure-v1.0.0.iso (~1-2GB)
• output/knel-football-secure-v1.0.0.iso.sha256
• output/knel-football-secure-v1.0.0.iso.md5
• output/BUILD-REPORT.txt

All files owned by invoking user. All operations inside Docker container. No host system modifications.

2026-01-24: Docker-in-Docker Issue Identified

Problem

Error: "docker: command not found" inside container Root Cause: src/run-new.sh tries to run docker run inside a container Architecture Issue: Attempting Docker-in-Docker (nested containers) Problem:

• Root run.sh runs container
• Inside container, run-new.sh tries to run docker run again
• Docker command not available to builder user
• This is not the intended design

Correct Architecture

Host System
  └─> run.sh (wrapper)
      └─> docker run knel-football-dev:latest (ONE container level)
          └─> bash -c "build commands" (direct execution, not docker run)
              ├─> lb config
              ├─> lb build
              └─> chown artifacts

Solution: Simplify ISO Command

Action: Remove src/run-new.sh from ISO build flow Implementation: Have run.sh run build commands directly in container Benefit: Single level of Docker, cleaner architecture, no nested containers

Revised run.sh iso Command

iso)
    docker run --rm \
        -v "${SCRIPT_DIR}:/workspace:ro" \
        -v "${OUTPUT_DIR}:/output" \
        -v "${BUILD_DIR}:/build" \
        -e TZ="America/Chicago" \
        -e DEBIAN_FRONTEND="noninteractive" \
        -e LC_ALL="C" \
        -e USER_UID="$(id -u)" \
        -e USER_GID="$(id -g)" \
        "${DOCKER_IMAGE}" \
        bash -c "
        # Build commands directly
        cd /build
        lb config ...
        lb build ...
        chown ...
        "
    ;;

Key Insight

Pattern: Don't try to orchestrate Docker from inside Docker Why: Docker command not available inside container by default When to use Docker-in-Docker: Only with specific Docker-in-Docker configuration Better Approach: Run single container with all commands executed inside

Next Actions

1. Simplify run.sh iso command to execute directly
2. Remove dependency on src/run-new.sh for ISO builds
3. Ensure all commands run in single container level
4. Test ISO build with simplified architecture

2026-01-24: ISO Build Successfully Started

Problem Solved: Container User Permissions

Issue: Container default user builder (UID 999) caused permission problems Root Cause:

• Dockerfile sets USER builder as default
• Live-build requires root privileges (UID 0)
• Running as non-root user: "Permission denied" errors

Solution: Add --user root flag to docker run Implementation:

docker run --rm \
    --user root \
    -v ... \
    -e USER_UID="$(id -u)" \
    -e USER_GID="$(id -g)" \
    knel-football-dev:latest \
    /build/iso_build.sh

Final Architecture (Working)

Host (UID 1000)
  └─> docker run --user root (container as UID 0)
      └─> /build/iso_build.sh (build script)
          ├─> lb config (configure)
          ├─> lb build (generate ISO - 30-60 min)
          └─> chown $USER_UID:$USER_GID (correct ownership)
              └─> cp /output/ (copy artifacts)

Current Build Status

✅ Build in progress (started 2026-01-24 11:51 CST) ✅ Running as root (required by live-build) ✅ Custom configuration applied ✅ Bootstrapping system (downloading packages) ✅ No permission errors

Build Stages (Expected Timeline)

1. lb bootstrap (downloading packages) - 15-20 minutes ⏳ Current
2. lb chroot (installing packages, running hooks) - 20-30 minutes
3. lb binary (creating ISO) - 5-10 minutes
4. Finalization (checksums, ownership) - 1-2 minutes

Total time: 30-60 minutes

Monitoring Commands

# View real-time build log
tail -f /tmp/knel-iso-build.log

# Check output directory (files appear after completion)
ls -lh output/

# Check if build completed
grep "Build completed successfully" /tmp/knel-iso-build.log

# Check for errors
grep -i "error\|failed" /tmp/knel-iso-build.log

Expected Output Files

• output/knel-football-secure-v1.0.0.iso (~1-2GB)
• output/knel-football-secure-v1.0.0.iso.sha256 (checksum)
• output/knel-football-secure-v1.0.0.iso.md5 (checksum)
• All files owned by invoking user (UID 1000)
• All operations inside Docker container

Key Lessons Learned

1. Default user matters: Dockerfile sets USER builder, which persists
2. Explicit root required: Live-build needs --user root flag
3. Volume permissions: Root container writes files owned by root, then chown corrects
4. Environment variables: Pass USER_UID/USER_GID to preserve ownership
5. Timezone compliance: Set TZ="America/Chicago" as requested

Compliance Check (AGENTS.md)

✅ All operations in Docker container ✅ Docker volumes used for all file I/O ✅ No directories created in /home ✅ No host system files modified ✅ Only final artifacts copied to output/ ✅ File ownership preserved (chown step) ✅ Only docker/git/libvirt on host ✅ No working directory clutter

Next Steps

1. Wait for build completion (30-60 minutes)
2. Verify final artifacts in output/
3. Test ISO boot with libvirt/virsh
4. Document build results

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ISO build is running successfully! Monitoring with: tail -f /tmp/knel-iso-build.log Expected completion: ~2026-01-24 12:50-13:00 CST

2026-01-24: Build Failed - Mount Permissions Issue

Problem Identified

Error: "mount: permission denied" during lb chroot stage Cause: Container lacks mount capabilities even when running as root Issue: Docker containers have limitations on mount operations by default Required: --privileged flag for live-build mount operations

What Failed

• ✅ lb bootstrap (completed successfully)
• ❌ lb chroot (failed on mount)
• Specific errors:
  • mount: /build/chroot/dev/pts: permission denied
  • mount: /build/chroot/proc: permission denied

Root Cause

Live-build needs to mount several filesystems inside chroot environment:

• /dev/pts (pseudo-terminal)
• /proc (process information)
• /sys (system information)
• /dev (device files)

Docker containers restrict these operations by default for security. Even running as root user inside container doesn't give container mount capabilities.

Solution: --privileged Flag

Add --privileged flag to docker run command to give container all capabilities.

Implementation:

docker run --rm \
    --privileged \  # NEW: Required for mount operations
    --user root \
    -v ... \
    knel-football-dev:latest \
    /build/iso_build.sh

Security Considerations

--privileged gives container full access to host devices. This is:

• ✅ Required for live-build in containers
• ⚠️ Acceptable for isolated build environment
• ✅ Still better than building directly on host
• ✅ All intermediate files stay in container volume
• ✅ Final artifacts copied out and ownership corrected

Alternative Approaches Considered

1. Bind mount host /dev, /proc, /sys: More complex, less clean
2. Use Docker-in-Docker socket: Overkill, breaks AGENTS.md
3. Build directly on host: Violates AGENTS.md requirements
4. Use --privileged: Selected - clean solution, maintains compliance

Build Restart Strategy

1. Add --privileged flag to docker run command
2. Clean tmp/ directory
3. Restart build
4. Monitor for successful completion
5. Verify final artifacts

Expected Outcome with --privileged

• ✅ Mount operations succeed
• ✅ lb chroot completes
• ✅ Hooks execute (security hardening)
• ✅ lb binary generates ISO
• ✅ Final artifacts copied to output/

Compliance Note

Using --privileged is acceptable because:

• Still Docker-based (not building directly on host)
• All intermediate files stay in container volume
• Only final artifacts copied to host
• No host system files modified
• Ownership preserved with chown step
• Better than host-based build

2026-01-24: Session Wrap-Up

Current Status (2026-01-24 19:00 CST)

Build Running in Background: YES

• Current Stage: lb binary_chroot (creating binary filesystem)
• Started: 18:04 CST
• Expected Completion: 19:00-19:15 CST
• Status: All previous stages completed successfully

Final Working Configuration

Attempt 7: Minimal configuration (all problematic flags removed) Removed Flags:

• --linux-packages (caused duplicate package names)
• --memtest (missing memtest86+.bin file)
• --win32-loader (package not available)

Required Flags:

• --privileged (mount operations)
• --user root (live-build requirement)
• Build in /tmp (not mounted volume)
• USER_UID/USER_GID for ownership preservation

Key Lessons Learned

1. Default container user matters: builder (UID 999) needs explicit --user root
2. Privileged flag required: Even root user needs --privileged for mount ops
3. Volume permissions issue: Cannot write to mounted volumes from container
4. Use container /tmp: Build entirely inside container, not on mounted volume
5. Minimal config wins: Remove unnecessary flags to avoid conflicts
6. Ownership preservation: Use chown with passed UID/GID environment variables

Project Completion Status

Completed:

• ✅ Docker build environment (Dockerfile)
• ✅ Root run.sh entry point
• ✅ Docker-only workflow (AGENTS.md compliance)
• ✅ All configuration files
• ✅ Security hardening hooks
• ✅ Custom package lists
• ✅ Desktop environment setup
• ✅ Live-build configuration
• ✅ Append-only JOURNAL.md
• ✅ Comprehensive RESUME.md guide

In Progress:

• ⏳ ISO build (running in background)
  • Bootstrap: ✅ Complete
  • Chroot: ✅ Complete
  • Binary: ⏳ In progress (15 min remaining)
  • Finalization: ⏳ Pending

Pending:

• ⏳ ISO testing with libvirt/virsh
• ⏳ Security feature validation
• ⏳ Documentation finalization
• ⏳ Release preparation

Files Created Today

1. Dockerfile - Multi-stage build environment
2. run.sh - Main entry point (build/test/lint/clean/iso/shell)
3. AGENTS.md - Docker-only workflow requirements (already existed)
4. JOURNAL.md - Append-only development journal
5. RESUME.md - Comprehensive resumption guide

Compliance Verification

AGENTS.md Requirements:

• ✅ All operations in Docker container
• ✅ Docker volumes used for file I/O
• ✅ No directories created in /home
• ✅ No host system files modified
• ✅ Only final artifacts copied to output/
• ✅ File ownership preserved (chown step)
• ✅ Only docker/git/libvirt on host
• ✅ No working directory clutter

Next Actions (When Resuming)

1. Check build status: ls -lh output/
2. Monitor if needed: tail -f /tmp/knel-iso-build.log
3. Verify ISO: sha256sum -c output/*.sha256
4. Test ISO: virt-install ... with libvirt
5. Validate security features in live environment

Session Summary

Time: 2026-01-24 11:00-19:00 CST (8 hours) Goal: Build KNEL-Football secure ISO with Docker-only workflow Status: Build running successfully, expected completion in ~15 minutes Progress: All stages completed except binary ISO creation

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READY TO RESUME: All work documented in RESUME.md BUILD STATUS: Running, check output/ when returning DOCUMENTATION: Complete, including issues and solutions

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Session: 2026-01-28 - Mandatory Full Disk Encryption & Password Complexity

New Requirements Added

Decision: Full disk encryption and strong password complexity are now MANDATORY. Why: Tier0 security requirements demand encrypted storage and strong authentication. Impact: All systems must use LUKS2 encryption with AES-256-XTS and strong passphrases.

Changes Made

1. PRD.md Created

• Comprehensive product requirements document
• FR-001: Full Disk Encryption (MANDATORY - P0 Critical)
  • LUKS2 format with AES-256-XTS (512-bit key)
  • Argon2id key derivation function
  • Separate unencrypted /boot partition (UEFI requirement)
  • Encryption passphrase required at every boot
  • Minimum 14 characters, complexity requirements
• Security architecture documentation
• Compliance requirements (NIST SP 800-111, NIST SP 800-53)

2. preseed.cfg Updated

• Partition method changed to "crypto" (LUKS encryption)
• LVM within encrypted partition layout
• AES-XTS-plain64 cipher with 512-bit key size
• LUKS2 format enabled
• Secure disk erasure enabled
• Password complexity enforcement in preseed (24-char default)
• Added packages: cryptsetup, cryptsetup-initramfs, dmsetup, libpam-pwquality

3. Encryption Hooks Created

• config/hooks/installed/encryption-setup.sh
  • Configures LUKS2 settings
  • Sets up initramfs for encryption
  • Creates key management scripts
  • Configures encryption status service
• config/hooks/installed/encryption-validation.sh
  • Validates encryption configuration
  • Creates user reminder files
  • Sets up MOTD encryption messages
  • First boot encryption check service

4. Security Hardening Enhanced

• src/security-hardening.sh updated with stronger password policy
• /etc/security/pwquality.conf configuration:
  • Minimum length: 14 characters
  • Mandatory: 1 uppercase, 1 lowercase, 1 digit, 1 special character
  • Additional complexity requirements
  • Bad words blacklisted
  • Enforcement enabled for all users including root

5. Documentation Updated

• AGENTS.md: Added MANDATORY security requirements section
  • Full disk encryption requirements documented
  • Password complexity requirements documented
  • Compliance references added
• README.md: Updated features to highlight encryption and password requirements
• PRD.md: Comprehensive requirements document

Technical Implementation

Partition Layout

/dev/sda1    512M   EFI System Partition (ESP)
/dev/sda2    512M   /boot (ext4, unencrypted)
/dev/sda3    Remainder   LUKS2 encrypted partition
  └─ cryptroot (LVM)    AES-256-XTS    / (ext4)
  └─ swap (LVM)          swap           swap

Encryption Configuration

• Cipher: aes-xts-plain64
• Key Size: 512 bits (256-bit keys for XTS)
• Hash: SHA-512
• KDF: Argon2id (with appropriate iterations)
• Salt Size: 512 bits
• Key Slots: 8 maximum

Password/Passphrase Requirements

• Encryption passphrase: 14+ chars, complexity required
• User passwords: 14+ chars, complexity enforced via PAM
• Character classes: minimum 3 of 4 (upper, lower, digit, special)
• No common words or patterns
• Enforced for ALL users including root

Security Compliance

• NIST SP 800-111: Guide to Storage Encryption Technologies
• NIST SP 800-53: Security and Privacy Controls
• NIST SP 800-63B: Digital Identity Guidelines
• CIS Benchmarks: Security Configuration Guides
• DISA STIG: Security Technical Implementation Guides

Key Management Scripts

• /usr/local/bin/check-encryption.sh: Check encryption status
• /usr/local/bin/manage-encryption-keys.sh: Manage LUKS key slots
• /usr/local/bin/firstboot-encryption-check.sh: First boot reminder

Documentation Files

• ~/ENCRYPTION-PASSPHRASE-REMINDER.txt: User-facing reminder
• /var/backups/keys/README.txt: Technical recovery information
• MOTD encryption status messages

Next Steps

1. Build ISO with encryption configuration
2. Test ISO in virtual machine
3. Verify encryption setup at boot
4. Test passphrase complexity enforcement
5. Validate all security requirements met
6. Document any issues or fixes

Build Command

See run.sh for ISO build command with proper Docker container usage. All operations run inside Docker container following AGENTS.md requirements.

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