proxmox/docs/archive/completion/LETS_ENCRYPT_SETUP_COMPLETE.md

Let's Encrypt Setup - Final Status

Date: $(date)
Domain: rpc-core.d-bis.org
Status: ⚠️ DNS RECORD CREATED - CERTIFICATE PENDING

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✅ Completed Steps

1. ✅ DNS Record Created

   • Record ID: fca10a577c5b631b298dac12a7f2f8a8
   • Type: A
   • Name: rpc-core
   • Target: 192.168.11.250
   • Proxied: No (DNS only - required for private IP)

2. ✅ Nginx Configuration

   • Domain added to server_name
   • Ready for certificate

3. ✅ Certbot Installed

   • Version: 1.21.0
   • Auto-renewal enabled

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⚠️ Current Issue

Let's Encrypt HTTP-01 Challenge Failing

Error: no valid A records found for rpc-core.d-bis.org

Possible Causes:

1. DNS still propagating (can take 2-5 minutes)
2. Server on private IP (192.168.11.250) - Let's Encrypt can't reach it directly
3. Port 80 not accessible from internet

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🔧 Solutions

Option 1: Wait and Retry (If DNS Propagating)

# Wait 5 minutes, then retry
pct exec 2500 -- certbot --nginx \
    --non-interactive --agree-tos \
    --email admin@d-bis.org \
    -d rpc-core.d-bis.org --redirect

Option 2: Use DNS-01 Challenge (Recommended for Private IP)

Since the server is on a private IP, use DNS-01 challenge:

# Install DNS plugin
pct exec 2500 -- apt-get install -y python3-certbot-dns-cloudflare

# Create credentials file
pct exec 2500 -- bash -c 'cat > /etc/cloudflare/credentials.ini <<EOF
dns_cloudflare_api_token = YOUR_CLOUDFLARE_API_TOKEN
EOF
chmod 600 /etc/cloudflare/credentials.ini'

# Obtain certificate using DNS-01
pct exec 2500 -- certbot certonly --dns-cloudflare \
    --dns-cloudflare-credentials /etc/cloudflare/credentials.ini \
    --non-interactive --agree-tos \
    --email admin@d-bis.org \
    -d rpc-core.d-bis.org

# Update Nginx manually
pct exec 2500 -- sed -i 's|ssl_certificate /etc/nginx/ssl/rpc.crt;|ssl_certificate /etc/letsencrypt/live/rpc-core.d-bis.org/fullchain.pem;|' /etc/nginx/sites-available/rpc-core
pct exec 2500 -- sed -i 's|ssl_certificate_key /etc/nginx/ssl/rpc.key;|ssl_certificate_key /etc/letsencrypt/live/rpc-core.d-bis.org/privkey.pem;|' /etc/nginx/sites-available/rpc-core

pct exec 2500 -- nginx -t
pct exec 2500 -- systemctl reload nginx

Option 3: Use Cloudflare Tunnel (Alternative)

If using Cloudflare Tunnel, configure tunnel route and use Cloudflare's SSL instead.

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📋 Next Steps

1. Wait 5 minutes for DNS propagation
2. Retry HTTP-01 challenge OR
3. Use DNS-01 challenge (recommended for private IP)

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📊 Current Configuration

• DNS Record: ✅ Created (DNS only, not proxied)
• Nginx: ✅ Configured with domain
• Certbot: ✅ Installed
• Certificate: ⏳ Pending (validation failing)

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Last Updated: $(date)