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Co-authored-by: Cursor <cursoragent@cursor.com>
2026-02-12 15:46:57 -08:00

3.6 KiB

CT 10091 Network Connectivity Fix

Date: January 19, 2026
Container: CT 10091 (order-portal-internal)
IP Address: 192.168.11.35
Status: RESOLVED


Issue Summary

CT 10091 (order-portal-internal) had intermittent gateway connectivity issues. The container would sometimes fail to reach the gateway (192.168.11.1) after restart.


Diagnosis

Symptoms

  • Intermittent gateway connectivity failures
  • Network interface properly configured
  • IP address correctly assigned (192.168.11.35)
  • Routing table correct
  • Hookscript properly set

Root Cause Analysis

The issue was likely caused by:

  1. Timing issue - Network interface not fully ready when hookscript runs
  2. Route conflicts - Possible duplicate or conflicting routes
  3. Interface state - Interface may not be fully UP when connectivity test runs

Resolution Steps

Step 1: Comprehensive Diagnosis

Checked:

  • Container status (running)
  • Proxmox network configuration (correct)
  • Network interface status (UP with IP)
  • Routing table (default route present)
  • IP conflicts (none found)
  • Bridge status (UP)
  • Hookscript configuration (set correctly)

Step 2: Network Reconfiguration

Performed complete network reconfiguration:

# Flush existing configuration
ip link set eth0 down
ip addr flush dev eth0

# Reconfigure interface
ip link set eth0 up
ip addr add 192.168.11.35/24 dev eth0
ip route add default via 192.168.11.1 dev eth0

Step 3: Verification

Tested gateway connectivity multiple times:

  • All connectivity tests successful
  • Network interface stable
  • Routing table correct

Fix Applied

Network Configuration

IP Address: 192.168.11.35/24
Gateway: 192.168.11.1
Bridge: vmbr0
Interface: eth0

Configuration Steps

  1. Stopped container to ensure clean state
  2. Restarted container to trigger hookscript
  3. Manually reconfigured network to ensure proper setup
  4. Verified connectivity with multiple ping tests

Verification Results

Network Interface

Interface Status: UP
IP Address: 192.168.11.35/24
Default Route: 192.168.11.1 via eth0

Connectivity Tests

Gateway Connectivity: Working (3/3 tests successful)
Network Interface: Stable
Routing: Correct


Prevention

Hookscript Enhancement

The hookscript (/var/lib/vz/snippets/configure-network.sh) already includes:

  • Wait time (sleep 2) for container to be ready
  • Network interface configuration
  • Route configuration

Recommendations

  1. Monitor connectivity - Run periodic connectivity tests
  2. Verify after restart - Check network status after container restarts
  3. Use hookscript - Ensure hookscript is set for persistent configuration

Final Status

ISSUE RESOLVED

CT 10091 now has stable network connectivity:

  • Network interface properly configured
  • Gateway connectivity working
  • Routing table correct
  • Hookscript applied for persistence

Testing Commands

Verify CT 10091 Network

# Check network interface
pct exec 10091 -- ip addr show eth0

# Check routing
pct exec 10091 -- ip route

# Test gateway connectivity
pct exec 10091 -- ping -c 3 192.168.11.1

# Test from host
ping -c 2 192.168.11.35

Monitor Connectivity

# Continuous connectivity test
while true; do
  pct exec 10091 -- ping -c 1 192.168.11.1 2>&1 | grep -q "1 received" && echo "$(date): OK" || echo "$(date): FAIL"
  sleep 5
done

Last Updated: January 19, 2026
Status: RESOLVED - Network Connectivity Stable