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✨ Enhance log analysis with advanced filtering and search capabilities

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Add comprehensive log analysis features to improve troubleshooting workflows:
- Time-based filtering (8pm-6am shifts) with HH:MM format support
- Multi-level log filtering (ERROR, WARNING, EMERGENCY, etc.)
- Full-text search across log content with case-insensitive matching
- Proper line break formatting for readable output
- Line count limiting for large log files

New REST API endpoints:
- /api/logs/errors/{job_id} - Get only error/warning logs
- /api/logs/search/{job_id} - Search logs for specific terms
- Enhanced /api/logs/job/{job_id} with filtering parameters

New MCP tools:
- get_error_logs - Streamlined error analysis
- search_job_logs - Pattern-based log searching
- Enhanced get_job_logs with all filtering options

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Nicolas Koehl
2025-06-02 17:42:35 +07:00
parent 3aa1d90b89
commit dc2fe4c425
3 changed files with 489 additions and 44 deletions
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36
CLAUDE.md
View File

@ -26,6 +26,42 @@ Nomad MCP is a service that enables management of HashiCorp Nomad jobs via REST
Always maintain backward compatibility with existing API endpoints. Follow REST principles.
## Enhanced Log Analysis Features
The logs API has been enhanced with advanced filtering and analysis capabilities:
### REST API Endpoints:
- `/api/logs/job/{job_id}` - Enhanced with time, level, and search filtering
- `/api/logs/errors/{job_id}` - Get only error/warning logs
- `/api/logs/search/{job_id}` - Search logs for specific terms
- `/api/logs/repository/{repository}` - Get logs by repository name
### New Query Parameters:
- `start_time` & `end_time` - Filter by time range (HH:MM format)
- `log_level` - Filter by levels (ERROR, WARNING, INFO, etc.)
- `search` - Search for specific terms
- `lines` - Limit number of lines returned
- `formatted` - Proper line breaks (default: true)
### MCP Tools Available:
- `get_job_logs` - Enhanced with all filtering options
- `get_error_logs` - Convenience tool for troubleshooting
- `search_job_logs` - Search logs for patterns
### Example Usage:
```bash
# Get errors between 8pm-6am for plant-manager in production
curl "https://nomad_mcp.dev.meisheng.group/api/logs/errors/plant-manager?namespace=production&start_time=20:00&end_time=06:00"
# Search for pump issues
curl "https://nomad_mcp.dev.meisheng.group/api/logs/search/plant-manager?q=pump&namespace=production"
# Get last 50 lines with proper formatting
curl "https://nomad_mcp.dev.meisheng.group/api/logs/job/plant-manager?namespace=production&lines=50&formatted=true"
```
Always maintain backward compatibility with existing API endpoints. Follow REST principles.
## SSL Certificate Management for Internal Services
When working with internal/corporate services that use custom Certificate Authorities (CAs):

204
app/routers/logs.py
View File

@ -1,6 +1,8 @@
from fastapi import APIRouter, HTTPException, Query
from typing import List, Dict, Any, Optional
import logging
import re
from datetime import datetime, time as datetime_time
from app.services.nomad_client import NomadService
from app.services.config_service import ConfigService
@ -12,6 +14,133 @@ router = APIRouter()
nomad_service = NomadService()
config_service = ConfigService()
def format_logs_with_line_breaks(logs: str) -> str:
"""Format logs with proper line breaks."""
if not logs:
return logs
# Ensure proper line breaks
formatted = logs.replace('\\n', '\n')
# Clean up any double line breaks
formatted = re.sub(r'\n{3,}', '\n\n', formatted)
return formatted.strip()
def filter_logs_by_time(logs: str, start_time: str = None, end_time: str = None) -> str:
"""Filter logs by time range."""
if not logs or (not start_time and not end_time):
return logs
lines = logs.split('\n')
filtered_lines = []
for line in lines:
# Extract timestamp from log line (assumes format: YYYY-MM-DD HH:MM:SS)
timestamp_match = re.search(r'(\d{4}-\d{2}-\d{2}\s+\d{2}:\d{2}:\d{2})', line)
if not timestamp_match:
# If no timestamp, include the line (might be continuation)
filtered_lines.append(line)
continue
try:
log_time = datetime.strptime(timestamp_match.group(1), '%Y-%m-%d %H:%M:%S')
log_time_only = log_time.time()
# Parse time filters
include_line = True
if start_time:
if ':' in start_time and len(start_time.split(':')) == 2:
start_t = datetime.strptime(start_time, '%H:%M').time()
if log_time_only < start_t:
include_line = False
if end_time and include_line:
if ':' in end_time and len(end_time.split(':')) == 2:
end_t = datetime.strptime(end_time, '%H:%M').time()
if log_time_only > end_t:
include_line = False
if include_line:
filtered_lines.append(line)
except ValueError:
# If time parsing fails, include the line
filtered_lines.append(line)
return '\n'.join(filtered_lines)
def filter_logs_by_level(logs: str, log_level: str) -> str:
"""Filter logs by log level. Supports multiple levels separated by |"""
if not logs or not log_level:
return logs
lines = logs.split('\n')
filtered_lines = []
# Handle multiple log levels separated by |
levels = [level.strip().upper() for level in log_level.split('|')]
level_patterns = [re.compile(rf'\b{level}\b', re.IGNORECASE) for level in levels]
for line in lines:
if any(pattern.search(line) for pattern in level_patterns):
filtered_lines.append(line)
return '\n'.join(filtered_lines)
def search_logs(logs: str, search_term: str) -> str:
"""Search logs for specific term."""
if not logs or not search_term:
return logs
lines = logs.split('\n')
filtered_lines = []
search_pattern = re.compile(re.escape(search_term), re.IGNORECASE)
for line in lines:
if search_pattern.search(line):
filtered_lines.append(line)
return '\n'.join(filtered_lines)
def limit_log_lines(logs: str, lines_limit: int) -> str:
"""Limit number of log lines returned."""
if not logs or not lines_limit:
return logs
lines = logs.split('\n')
return '\n'.join(lines[-lines_limit:]) # Return most recent lines
def process_logs(logs: str, start_time: str = None, end_time: str = None,
log_level: str = None, search: str = None, lines: int = None,
formatted: bool = True) -> str:
"""Process logs with all filters and formatting."""
if not logs:
return logs
# Apply formatting first
if formatted:
logs = format_logs_with_line_breaks(logs)
# Apply time filtering
if start_time or end_time:
logs = filter_logs_by_time(logs, start_time, end_time)
# Apply log level filtering
if log_level:
logs = filter_logs_by_level(logs, log_level)
# Apply search filtering
if search:
logs = search_logs(logs, search)
# Limit lines if specified
if lines:
logs = limit_log_lines(logs, lines)
return logs
# More specific routes first
@router.get("/repository/{repository}")
async def get_repository_logs(
@ -132,7 +261,14 @@ async def get_job_logs(
namespace: str = Query(None, description="Nomad namespace"),
log_type: str = Query("stderr", description="Log type: stdout or stderr"),
limit: int = Query(1, description="Number of allocations to return logs for"),
plain_text: bool = Query(False, description="Return plain text logs instead of JSON")
plain_text: bool = Query(False, description="Return plain text logs instead of JSON"),
# New filtering parameters
start_time: str = Query(None, description="Start time filter (YYYY-MM-DD HH:MM or HH:MM)"),
end_time: str = Query(None, description="End time filter (YYYY-MM-DD HH:MM or HH:MM)"),
log_level: str = Query(None, description="Filter by log level: ERROR, WARNING, INFO, DEBUG"),
search: str = Query(None, description="Search term to filter logs"),
lines: int = Query(None, description="Number of log lines to return (most recent)"),
formatted: bool = Query(True, description="Return formatted logs with proper line breaks")
):
"""Get logs for the most recent allocations of a job."""
# Create a custom service with the specific namespace if provided
@ -179,12 +315,23 @@ async def get_job_logs(
logs = custom_nomad.get_allocation_logs(alloc_id, task_name, log_type)
# Only add if we got some logs and not an error message
if logs and not logs.startswith("No") and not logs.startswith("Error"):
# Process logs with filters
processed_logs = process_logs(
logs,
start_time=start_time,
end_time=end_time,
log_level=log_level,
search=search,
lines=lines,
formatted=formatted
)
result.append({
"alloc_id": alloc_id,
"task": task_name,
"type": log_type,
"create_time": alloc.get("CreateTime"),
"logs": logs
"logs": processed_logs
})
logger.info(f"Successfully retrieved logs for {task_name}")
else:
@ -197,7 +344,15 @@ async def get_job_logs(
if plain_text:
if not result:
return "No logs found for this job"
return "\n\n".join([f"=== {r.get('task')} ===\n{r.get('logs')}" for r in result])
# Combine all logs with task separators
combined_logs = []
for r in result:
task_logs = r.get('logs', '')
if task_logs:
combined_logs.append(f"=== {r.get('task')} ===\n{task_logs}")
return "\n\n".join(combined_logs)
# Otherwise return as JSON
return {
@ -269,6 +424,49 @@ async def get_build_logs(job_id: str, plain_text: bool = Query(False)):
# This is a convenience endpoint that returns stderr logs from the latest allocation
return await get_latest_allocation_logs(job_id, "stderr", plain_text)
@router.get("/errors/{job_id}")
async def get_error_logs(
job_id: str,
namespace: str = Query(None, description="Nomad namespace"),
start_time: str = Query(None, description="Start time filter (HH:MM format, e.g., 20:00)"),
end_time: str = Query(None, description="End time filter (HH:MM format, e.g., 06:00)"),
plain_text: bool = Query(True, description="Return plain text logs instead of JSON")
):
"""Get error and warning logs for a job, with optional time filtering."""
return await get_job_logs(
job_id=job_id,
namespace=namespace,
log_type="stderr",
limit=5, # Check more allocations for errors
plain_text=plain_text,
start_time=start_time,
end_time=end_time,
log_level="WARNING|ERROR|EMERGENCY|CRITICAL", # Multiple levels
formatted=True
)
@router.get("/search/{job_id}")
async def search_job_logs(
job_id: str,
q: str = Query(..., description="Search term"),
namespace: str = Query(None, description="Nomad namespace"),
log_type: str = Query("stderr", description="Log type: stdout or stderr"),
limit: int = Query(3, description="Number of allocations to search"),
lines: int = Query(100, description="Number of matching lines to return"),
plain_text: bool = Query(True, description="Return plain text logs instead of JSON")
):
"""Search job logs for specific terms."""
return await get_job_logs(
job_id=job_id,
namespace=namespace,
log_type=log_type,
limit=limit,
plain_text=plain_text,
search=q,
lines=lines,
formatted=True
)
# Generic allocation logs route last
@router.get("/allocation/{alloc_id}/{task}")
async def get_allocation_logs(

293
mcp_server.py
View File

@ -9,6 +9,7 @@ import json
import logging
import os
import sys
import requests
from typing import Any, Dict, List, Optional
from mcp.server import NotificationOptions, Server
@ -172,7 +173,7 @@ async def handle_list_tools() -> List[types.Tool]:
),
types.Tool(
name="get_job_logs",
description="Get logs for a Nomad job",
description="Get logs for a Nomad job with advanced filtering options",
inputSchema={
"type": "object",
"properties": {
@ -184,11 +185,103 @@ async def handle_list_tools() -> List[types.Tool]:
"type": "string",
"description": "Nomad namespace",
"default": "development"
},
"log_type": {
"type": "string",
"description": "Type of logs: stdout or stderr",
"enum": ["stdout", "stderr"],
"default": "stderr"
},
"start_time": {
"type": "string",
"description": "Start time filter (HH:MM format, e.g., '20:00' for 8 PM)"
},
"end_time": {
"type": "string",
"description": "End time filter (HH:MM format, e.g., '06:00' for 6 AM)"
},
"log_level": {
"type": "string",
"description": "Filter by log level: ERROR, WARNING, INFO, DEBUG, EMERGENCY, CRITICAL"
},
"search": {
"type": "string",
"description": "Search term to filter logs"
},
"lines": {
"type": "integer",
"description": "Number of recent log lines to return"
},
"limit": {
"type": "integer",
"description": "Number of allocations to check",
"default": 1
}
},
"required": ["job_id"]
}
),
types.Tool(
name="get_error_logs",
description="Get only error and warning logs for a Nomad job, useful for troubleshooting",
inputSchema={
"type": "object",
"properties": {
"job_id": {
"type": "string",
"description": "ID of the job to get error logs for"
},
"namespace": {
"type": "string",
"description": "Nomad namespace",
"default": "development"
},
"start_time": {
"type": "string",
"description": "Start time filter (HH:MM format, e.g., '20:00' for 8 PM)"
},
"end_time": {
"type": "string",
"description": "End time filter (HH:MM format, e.g., '06:00' for 6 AM)"
}
},
"required": ["job_id"]
}
),
types.Tool(
name="search_job_logs",
description="Search Nomad job logs for specific terms or patterns",
inputSchema={
"type": "object",
"properties": {
"job_id": {
"type": "string",
"description": "ID of the job to search logs for"
},
"search_term": {
"type": "string",
"description": "Term or pattern to search for in logs"
},
"namespace": {
"type": "string",
"description": "Nomad namespace",
"default": "development"
},
"log_type": {
"type": "string",
"description": "Type of logs: stdout or stderr",
"enum": ["stdout", "stderr"],
"default": "stderr"
},
"lines": {
"type": "integer",
"description": "Number of matching lines to return",
"default": 50
}
},
"required": ["job_id", "search_term"]
}
),
types.Tool(
name="submit_job_file",
description="Submit a Nomad job from HCL or JSON file content",
@ -431,56 +524,174 @@ async def handle_call_tool(name: str, arguments: Dict[str, Any]) -> List[types.T
text="Error: job_id is required"
)]
# Get allocations
allocations = nomad_service.get_allocations(job_id)
if not allocations:
# Use the enhanced REST API endpoint
import requests
base_url = os.getenv("BASE_URL", "http://localhost:8000")
# Build query parameters
params = {
"namespace": arguments.get("namespace", namespace),
"log_type": arguments.get("log_type", "stderr"),
"limit": arguments.get("limit", 1),
"plain_text": True,
"formatted": True
}
# Add optional filters
if arguments.get("start_time"):
params["start_time"] = arguments["start_time"]
if arguments.get("end_time"):
params["end_time"] = arguments["end_time"]
if arguments.get("log_level"):
params["log_level"] = arguments["log_level"]
if arguments.get("search"):
params["search"] = arguments["search"]
if arguments.get("lines"):
params["lines"] = arguments["lines"]
try:
response = requests.get(
f"{base_url}/api/logs/job/{job_id}",
params=params,
timeout=30
)
if response.status_code == 200:
logs_text = response.text
result = {
"success": True,
"job_id": job_id,
"namespace": params["namespace"],
"message": f"Retrieved logs for job {job_id}",
"logs": logs_text,
"filters_applied": {k: v for k, v in params.items() if k not in ["namespace", "plain_text", "formatted"]}
}
else:
result = {
"success": False,
"job_id": job_id,
"message": f"Failed to get logs: {response.status_code} - {response.text}",
"logs": None
}
except Exception as e:
result = {
"success": False,
"job_id": job_id,
"message": f"No allocations found for job {job_id}",
"message": f"Error getting logs: {str(e)}",
"logs": None
}
else:
# Get latest allocation
sorted_allocations = sorted(
allocations,
key=lambda a: a.get("CreateTime", 0),
reverse=True
)
latest_alloc = sorted_allocations[0]
alloc_id = latest_alloc.get("ID")
# Get task name
task_name = None
if "TaskStates" in latest_alloc:
task_states = latest_alloc["TaskStates"]
if task_states:
task_name = next(iter(task_states.keys()))
if not task_name:
task_name = "app" # Default task name
# Get logs
stdout_logs = nomad_service.get_allocation_logs(alloc_id, task_name, "stdout")
stderr_logs = nomad_service.get_allocation_logs(alloc_id, task_name, "stderr")
result = {
"success": True,
"job_id": job_id,
"allocation_id": alloc_id,
"task_name": task_name,
"message": f"Retrieved logs for job {job_id}",
"logs": {
"stdout": stdout_logs,
"stderr": stderr_logs
}
}
return [types.TextContent(
type="text",
text=json.dumps(result, indent=2)
text=json.dumps(result, indent=2) if not result.get("success") else result["logs"]
)]
elif name == "get_error_logs":
job_id = arguments.get("job_id")
if not job_id:
return [types.TextContent(
type="text",
text="Error: job_id is required"
)]
# Use the error logs endpoint
import requests
base_url = os.getenv("BASE_URL", "http://localhost:8000")
params = {
"namespace": arguments.get("namespace", namespace),
"plain_text": True
}
if arguments.get("start_time"):
params["start_time"] = arguments["start_time"]
if arguments.get("end_time"):
params["end_time"] = arguments["end_time"]
try:
response = requests.get(
f"{base_url}/api/logs/errors/{job_id}",
params=params,
timeout=30
)
if response.status_code == 200:
logs_text = response.text
result = {
"success": True,
"job_id": job_id,
"message": f"Retrieved error logs for job {job_id}",
"logs": logs_text
}
return [types.TextContent(
type="text",
text=logs_text
)]
else:
return [types.TextContent(
type="text",
text=f"Error: Failed to get error logs: {response.status_code} - {response.text}"
)]
except Exception as e:
return [types.TextContent(
type="text",
text=f"Error getting error logs: {str(e)}"
)]
elif name == "search_job_logs":
job_id = arguments.get("job_id")
search_term = arguments.get("search_term")
if not job_id or not search_term:
return [types.TextContent(
type="text",
text="Error: job_id and search_term are required"
)]
# Use the search logs endpoint
import requests
base_url = os.getenv("BASE_URL", "http://localhost:8000")
params = {
"q": search_term,
"namespace": arguments.get("namespace", namespace),
"log_type": arguments.get("log_type", "stderr"),
"lines": arguments.get("lines", 50),
"plain_text": True
}
try:
response = requests.get(
f"{base_url}/api/logs/search/{job_id}",
params=params,
timeout=30
)
if response.status_code == 200:
logs_text = response.text
return [types.TextContent(
type="text",
text=logs_text
)]
else:
return [types.TextContent(
type="text",
text=f"Error: Failed to search logs: {response.status_code} - {response.text}"
)]
except Exception as e:
return [types.TextContent(
type="text",
text=f"Error searching logs: {str(e)}"
)]
elif name == "submit_job_file":
file_content = arguments.get("file_content")
file_type = arguments.get("file_type", "json")