---
title: "Server Diagnostics Skill"
description: "Recovered LXC 300 skill reference for automated server troubleshooting. Covers Docker container diagnostics, SSH-based health checks, log reading, metrics collection, remediation workflows, and security constraints."
type: runbook
domain: monitoring
tags: [server-diagnostics, docker, ssh, health-check, remediation, n8n, paper-dynasty]
---

# Server Diagnostics - Automated Troubleshooting

## When to Activate This Skill
- N8N triggers with error context
- "diagnose container X", "check docker status"
- "read logs from server", "check disk usage"
- "troubleshoot server issue"
- Any automated health check response

## Quick Start

### Check All Containers
```bash
python ~/.claude/skills/server-diagnostics/client.py docker-status paper-dynasty
```

### Quick Health Check (Docker + System Metrics)
```bash
python ~/.claude/skills/server-diagnostics/client.py health paper-dynasty
```

### Get Container Logs
```bash
python ~/.claude/skills/server-diagnostics/client.py docker-logs paper-dynasty paper-dynasty_discord-app_1 --lines 200
```

### Restart a Container
```bash
python ~/.claude/skills/server-diagnostics/client.py docker-restart paper-dynasty paper-dynasty_discord-app_1
```

### System Metrics
```bash
python ~/.claude/skills/server-diagnostics/client.py metrics paper-dynasty --type all
python ~/.claude/skills/server-diagnostics/client.py metrics paper-dynasty --type disk
```

### Run Diagnostic Command
```bash
python ~/.claude/skills/server-diagnostics/client.py diagnostic paper-dynasty disk_usage
python ~/.claude/skills/server-diagnostics/client.py diagnostic paper-dynasty memory_usage
```

## Troubleshooting Workflow

When an issue is reported:

1. **Quick Health Check** - Get overview of containers and system state
   ```bash
   python ~/.claude/skills/server-diagnostics/client.py health paper-dynasty
   ```

2. **Check MemoryGraph** - Recall similar issues
   ```bash
   python ~/.claude/skills/memorygraph/client.py recall "docker container error"
   ```

3. **Get Container Logs** - Look for errors
   ```bash
   python ~/.claude/skills/server-diagnostics/client.py docker-logs paper-dynasty <container> --lines 500 --filter error
   ```

4. **Remediate if Safe** - Restart if allowed
   ```bash
   python ~/.claude/skills/server-diagnostics/client.py docker-restart paper-dynasty <container>
   ```

5. **Store Solution** - Save to MemoryGraph if resolved
   ```bash
   python ~/.claude/skills/memorygraph/client.py store \
     --type solution \
     --title "Fixed <container> issue" \
     --content "Description of problem and solution" \
     --tags "docker,paper-dynasty,troubleshooting" \
     --importance 0.7
   ```

## Server Inventory

| Server | IP | SSH User | Description |
|--------|-----|----------|-------------|
| paper-dynasty | 10.10.0.88 | cal | Paper Dynasty Discord bots and services |

## Monitored Containers

| Container | Critical | Restart Allowed | Description |
|-----------|----------|-----------------|-------------|
| paper-dynasty_discord-app_1 | Yes | Yes | Paper Dynasty Discord bot |
| paper-dynasty_db_1 | Yes | Yes | PostgreSQL database |
| paper-dynasty_adminer_1 | No | Yes | Database admin UI |
| sba-website_sba-web_1 | Yes | Yes | SBA website |
| sba-ghost_sba-ghost_1 | No | Yes | Ghost CMS |

## Available Diagnostic Commands

- `disk_usage` - df -h
- `memory_usage` - free -h
- `cpu_usage` - top -bn1 | head -20
- `cpu_load` - uptime
- `process_list` - ps aux --sort=-%mem | head -20
- `network_status` - ss -tuln
- `docker_ps` - docker ps -a (formatted)
- `docker_stats` - docker stats --no-stream
- `journal_errors` - journalctl -p err -n 50

## Security Constraints

### DENIED Patterns (Will Be Rejected)
- rm -rf, rm -r /
- dd if=, mkfs
- shutdown, reboot
- systemctl stop
- chmod 777
- wget|sh, curl|sh

### Container Restart Rules
- Only containers in config.yaml with restart_allowed: true
- N8N container restart is NEVER allowed (it triggers us)

## MemoryGraph Integration

Before troubleshooting, check for known solutions:
```bash
python ~/.claude/skills/memorygraph/client.py recall "docker paper-dynasty"
```

After resolving, store the pattern:
```bash
python ~/.claude/skills/memorygraph/client.py store \
  --type solution \
  --title "Brief description" \
  --content "Full explanation..." \
  --tags "docker,paper-dynasty,fix" \
  --importance 0.7
```

## Common Issues and Solutions

### Container Not Running
1. Check logs for crash reason
2. Check disk space and memory
3. Attempt restart if allowed
4. Escalate if restart fails

### High Memory Usage
1. Check which container is consuming
2. Review docker stats
3. Check for memory leaks in logs
4. Consider container restart

### Disk Space Low
1. Run disk_usage diagnostic
2. Check docker system df
3. Consider log rotation
4. Alert user for cleanup

## Output Format

All commands return JSON:
```json
{
  "success": true,
  "stdout": "...",
  "stderr": "...",
  "returncode": 0,
  "data": {...}  // Parsed data if applicable
}
```