EZ-Homelab/docs/troubleshooting/COMMON-ISSUES.md

Common Issues and Solutions

Installation Issues

Docker Group Permissions

Symptom: permission denied while trying to connect to the Docker daemon socket

Solution:

# After running setup script, you must log out and back in
exit  # or logout

# Or without logging out:
newgrp docker

Password Hash Generation Timeout

Symptom: Password hash generation takes longer than 60 seconds

Causes:

• High CPU usage from other processes
• Slow system (argon2 is computationally intensive)

Solutions:

# Check system resources
top
# or
htop

# If system is slow, reduce argon2 iterations (less secure but faster)
# This is handled automatically by Authelia - just wait
# On very slow systems, it may take up to 2 minutes

Port Conflicts

Symptom: bind: address already in use

Solution:

# Check what's using the port
sudo lsof -i :80
sudo lsof -i :443

# Common culprits:
# - Apache: sudo systemctl stop apache2
# - Nginx: sudo systemctl stop nginx
# - Another container: docker ps (find and stop it)

Deployment Issues

Authelia Restart Loop

Symptom: Authelia container keeps restarting

Common causes:

1. Password hash corruption - Fixed in current version
2. Encryption key mismatch - Changed .env after initial deployment

Solution:

# Check logs
sudo docker logs authelia

# If encryption key error, reset Authelia database:
sudo ./scripts/reset-test-environment.sh
# Then run setup and deploy again

Watchtower Issues

Status: Temporarily disabled due to Docker API compatibility

Issue: Docker 29.x requires API v1.44, but Watchtower versions have compatibility issues

Current state: Commented out in infrastructure.yml with documentation

Manual updates instead:

# Update all images in a stack
cd /opt/stacks/stack-name/
docker compose pull
docker compose up -d

Homepage Not Showing Correct URLs

Symptom: Homepage shows {{HOMEPAGE_VAR_DOMAIN}} instead of actual domain

Cause: Old deployment script version

Solution:

# Re-run deployment script (safe - won't affect running services)
./scripts/deploy-homelab.sh

# Or manually fix:
cd /opt/stacks/dashboards/homepage
sudo find . -name "*.yaml" -exec sed -i "s/{{HOMEPAGE_VAR_DOMAIN}}/yourdomain.duckdns.org/g" {} \;

Services Not Accessible via HTTPS

Symptom: Can't access services at https://service.yourdomain.duckdns.org

Solutions:

1. Check Traefik is running:

sudo docker ps | grep traefik
sudo docker logs traefik

2. Verify DuckDNS is updating:

sudo docker logs duckdns
# Should show "Your IP has been updated"

3. Check ports are open:

sudo ufw status
# Should show 80/tcp and 443/tcp ALLOW

4. Verify domain resolves:

nslookup yourdomain.duckdns.org
# Should return your public IP

Service-Specific Issues

Gluetun VPN Not Connecting

Symptom: Gluetun shows connection errors

Solutions:

# Check credentials in .env
cat ~/AI-Homelab/.env | grep SURFSHARK

# Check Gluetun logs
sudo docker logs gluetun

# Common fixes:
# 1. Wrong server region
# 2. Invalid credentials
# 3. WireGuard not supported by provider

Pi-hole DNS Not Working

Symptom: Devices can't resolve DNS through Pi-hole

Solutions:

# Check Pi-hole is running
sudo docker ps | grep pihole

# Verify port 53 is available
sudo lsof -i :53

# If systemd-resolved is conflicting:
sudo systemctl disable systemd-resolved
sudo systemctl stop systemd-resolved

Dockge Shows Empty

Symptom: No stacks visible in Dockge

Cause: Stacks not copied to /opt/stacks/

Solution:

# Check what exists
ls -la /opt/stacks/

# Re-run deployment to copy stacks
./scripts/deploy-homelab.sh

Performance Issues

Slow Container Start Times

Causes:

• First-time image pulls
• Slow disk (not using SSD/NVMe)
• Insufficient RAM

Solutions:

# Pre-pull images
cd /opt/stacks/stack-name/
docker compose pull

# Check disk performance
sudo hdparm -Tt /dev/sda  # Replace with your disk

# Check RAM usage
free -h

# Move /opt/stacks to faster disk if needed

High CPU Usage from Authelia

Normal: Argon2 password hashing is intentionally CPU-intensive for security

If persistent:

# Check what's causing load
sudo docker stats

# If Authelia constantly high:
sudo docker logs authelia
# Look for repeated authentication attempts (possible attack)

Reset and Recovery

Complete Reset (Testing Only)

Warning: This is destructive!

# Use the safe reset script
sudo ./scripts/reset-test-environment.sh

# Then re-run setup and deploy
sudo ./scripts/setup-homelab.sh
./scripts/deploy-homelab.sh

Partial Reset (Single Stack)

# Stop and remove specific stack
cd /opt/stacks/stack-name/
docker compose down -v  # -v removes volumes (data loss!)

# Redeploy
docker compose up -d

Backup Before Reset

# Backup important data
sudo tar czf ~/homelab-backup-$(date +%Y%m%d).tar.gz /opt/stacks/

# Backup specific volumes
docker run --rm \
  -v stack_volume:/data \
  -v $(pwd):/backup \
  busybox tar czf /backup/volume-backup.tar.gz /data

Getting Help

1. Check container logs:

   sudo docker logs container-name
   sudo docker logs -f container-name  # Follow logs
   

2. Use Dozzle for real-time logs: Access at https://dozzle.yourdomain.duckdns.org

3. Check the AI assistant: Ask Copilot in VS Code for specific issues

4. Verify configuration:

   # Check .env file
   cat ~/AI-Homelab/.env
   
   # Check compose file
   cat /opt/stacks/stack-name/docker-compose.yml
   

5. Docker system info:

   docker info
   docker version
   docker system df  # Disk usage