মডিউল ৭: ম্যানেজমেন্ট ও মনিটরিং (Management & Monitoring)

RabbitMQ এর স্বাস্থ্য এবং পারফরম্যান্স মনিটর করা প্রোডাকশনে অত্যন্ত গুরুত্বপূর্ণ।

১. Management UI

RabbitMQ Management Plugin একটি ওয়েব-বেসড UI প্রদান করে।

Features:

• Queue, Exchange, Binding দেখা এবং তৈরি করা
• Message publish এবং consume করা
• User এবং permission ম্যানেজ করা
• Cluster status দেখা
• Real-time metrics এবং charts

Access:

http://localhost:15672
Default: guest/guest

Key Metrics:

• Message rates: Publish, Deliver, Acknowledge
• Queue depth: কতগুলো মেসেজ pending
• Connection count: কতগুলো active connection
• Memory usage: কত মেমরি ব্যবহার হচ্ছে

২. Command Line Tools (rabbitmqctl)

Queue Management:

# List all queues
rabbitmqctl list_queues name messages consumers

# List queues with details
rabbitmqctl list_queues name messages_ready messages_unacknowledged

# Purge a queue
rabbitmqctl purge_queue my_queue

Connection Management:

# List connections
rabbitmqctl list_connections name peer_host peer_port state

# Close a connection
rabbitmqctl close_connection "<connection_name>" "Reason"

User Management:

# Create user
rabbitmqctl add_user myuser mypassword

# Set permissions
rabbitmqctl set_permissions -p / myuser ".*" ".*" ".*"

# List users
rabbitmqctl list_users

# Delete user
rabbitmqctl delete_user myuser

Cluster Management:

# Cluster status
rabbitmqctl cluster_status

# Node health check
rabbitmqctl node_health_check

# Environment info
rabbitmqctl environment

৩. Monitoring with Prometheus

Prometheus integration RabbitMQ এর জন্য industry-standard monitoring solution।

Setup:

# Enable Prometheus plugin
rabbitmq-plugins enable rabbitmq_prometheus

# Metrics endpoint
curl http://localhost:15692/metrics

Prometheus Configuration:

# prometheus.yml
scrape_configs:
  - job_name: "rabbitmq"
    static_configs:
      - targets: ["localhost:15692"]

Important Metrics:

# Queue metrics
rabbitmq_queue_messages
rabbitmq_queue_messages_ready
rabbitmq_queue_messages_unacknowledged

# Connection metrics
rabbitmq_connections
rabbitmq_channels

# Node metrics
rabbitmq_node_mem_used
rabbitmq_node_fd_used
rabbitmq_node_disk_free

Grafana Dashboard:

RabbitMQ এর জন্য pre-built Grafana dashboards আছে (Dashboard ID: 10991)

৪. Logging

Log Levels:

# Set log level
rabbitmqctl set_log_level debug

# Log levels: debug, info, warning, error, critical, none

Log Files Location:

• Linux: /var/log/rabbitmq/
• Windows: %APPDATA%\RabbitMQ\log\

Log Configuration:

# rabbitmq.conf
log.file.level = info
log.console.level = info
log.file = /var/log/rabbitmq/rabbit.log

৫. Tracing

Message tracing debugging এর জন্য খুব কার্যকর।

# Enable tracing plugin
rabbitmq-plugins enable rabbitmq_tracing

# Create a trace (via Management UI or CLI)
rabbitmqctl trace_on -p /

# Stop tracing
rabbitmqctl trace_off -p /

WARNING

Tracing পারফরম্যান্সে প্রভাব ফেলে, শুধুমাত্র debugging এর সময় ব্যবহার করুন।

৬. Health Checks

Basic Health Check:

rabbitmqctl status

Advanced Health Check:

# Check if node is running
rabbitmqctl ping

# Check alarms
rabbitmqctl alarm_list

# Check if node can accept connections
rabbitmqctl node_health_check

HTTP Health Check Endpoint:

# Health check endpoint
curl http://localhost:15672/api/health/checks/alarms
curl http://localhost:15672/api/health/checks/local-alarms

৭. Alerts Setup

Memory Alarm:

# rabbitmq.conf
vm_memory_high_watermark.relative = 0.4  # 40% of available RAM

Disk Space Alarm:

disk_free_limit.absolute = 2GB

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TIP

প্রোডাকশনে Prometheus + Grafana + Alertmanager সেটআপ করুন comprehensive monitoring এর জন্য।