今天需要測試一下 RabbitMQ 在打開 TLS 功能後，

能不能順利連線，簡單記錄一下吧～

1. 使用 Python

跟 ChatGPT 來回了幾次，寫出了一個可用的測試程式如下：

import ssl

import pika

# RabbitMQ server information
rabbitmq_host = 'rabbitmq.my-rabbitmq.svc.cluster.local'
rabbitmq_port = 5671
rabbitmq_username = 'root'
rabbitmq_password = 'password'

# Path to your certificate files
ssl_options = {
    'ca_certs': 'rabbit_ca.pem',
    'cert_reqs': ssl.CERT_REQUIRED
}

ssl_context = ssl.create_default_context(cafile=ssl_options['ca_certs'])
ssl_context.load_cert_chain('rabbit_client_crt.pem', 'rabbit_client_key.pem')
ssl_options = pika.SSLOptions(context=ssl_context, server_hostname=rabbitmq_host)

# RabbitMQ connection parameters
connection_params = pika.ConnectionParameters(
    host=rabbitmq_host,
    port=rabbitmq_port,
    virtual_host='/',
    credentials=pika.PlainCredentials(username=rabbitmq_username, password=rabbitmq_password),
    ssl_options=ssl_options
)

# Establish a connection to RabbitMQ
connection = pika.BlockingConnection(connection_params)

# Create a channel
channel = connection.channel()

# Declare a queue
channel.queue_declare(queue='example_queue')

# Publish a message
channel.basic_publish(exchange='',
                      routing_key='example_queue',
                      body='Hello, RabbitMQ with TLS!')

print(" [x] Sent 'Hello, RabbitMQ with TLS!'")

# Close the connection
connection.close()

2. 使用 rabbitmq-c CLI

在 Mac 上使用 Homebrew 安裝 rabbitmq-c：

brew install rabbitmq-c

裝好之後，可以在 /usr/local/Cellar/rabbitmq-c/<version>/bin 目錄下，

找到相關的 CLI，像 amqp-get 和 amqp-publish：

$ ll /usr/local/Cellar/rabbitmq-c/0.13.0/bin

-r-xr-xr-x  1 testuser  admin  54584 Dec 20 15:16 amqp-consume*
-r-xr-xr-x  1 testuser  admin  53232 Dec 20 15:16 amqp-declare-queue*
-r-xr-xr-x  1 testuser  admin  53200 Dec 20 15:16 amqp-delete-queue*
-r-xr-xr-x  1 testuser  admin  53088 Dec 20 15:16 amqp-get*
-r-xr-xr-x  1 testuser  admin  53632 Dec 20 15:16 amqp-publish*

amqp-get 的使用說明如下：

$ /usr/local/Cellar/rabbitmq-c/0.13.0/bin/amqp-get --help

Usage: amqp-get [OPTIONS]...
  -q, --queue=queue             the queue to consume from

Connection options
  -u, --url=amqp://...          the AMQP URL to connect to
  -s, --server=hostname         the AMQP server to connect to
      --port=port               the port to connect on
      --vhost=vhost             the vhost to use when connecting
      --username=username       the username to login with
      --password=password       the password to login with
      --heartbeat=heartbeat     heartbeat interval, set to 0 to disable
      --ssl                     connect over SSL/TLS
      --cacert=cacert.pem       path to the CA certificate file
      --key=key.pem             path to the client private key file
      --cert=cert.pem           path to the client certificate file

試了幾次，終於試出以下方法可以連上有 TLS 的 RabbitMQ：

/usr/local/Cellar/rabbitmq-c/0.13.0/bin/amqp-get \
  --url=amqps://root:password@rabbitmq.my-rabbitmq.svc.cluster.local:5671 \
  -q test-queue \
  --cacert rabbit_ca.pem \
  --cert rabbit_client_crt.pem \
  --key rabbit_client_key.pem

可以在 RabbitMQ UI 上，在 queue 裡面加一個 message，

用上面的方式就可以取到 message，也代表連線成功囉～