Azure Linux函数调用Azure AI Speech遇WS_OPEN_ERROR_UNDERLYING_IO_OPEN_FAILED错误

本地Windows开发的Python Azure函数（Linux运行环境），调用Azure AI Speech（原Azure认知服务）的文本转语音（TTS）功能时本地运行正常，但部署到Azure云后出现连接错误：

Connection failed (no connection to the remote host). Internal error: 1. Error details: Failed with error: WS_OPEN_ERROR_UNDERLYING_IO_OPEN_FAILED wss://eastus.tts.speech.microsoft.com/cognitiveservices/websocket/v1 X-ConnectionId: 45e9f87a28fa40ba981221cb55f6fc15 USP state: Sending. Received audio size: 0 bytes.

代码实现 #

try:
    file_url = None

    speech_config = speechsdk.SpeechConfig(
        subscription=my_azure_ai_speech_api_key,
        region="eastus"
    )

    local_audio_path = f"/tmp/{filename}"
    ensure_directory_exists(local_audio_path)

    audio_config = speechsdk.audio.AudioOutputConfig(filename=local_audio_path)
    synthesizer = speechsdk.SpeechSynthesizer(speech_config=speech_config, audio_config=audio_config)
    result = synthesizer.speak_text_async(text).get()

    if result.reason == speechsdk.ResultReason.Canceled:
        cancellation_details = result.cancellation_details
        cancellation_reason = cancellation_details.reason
        cancellation_error = ""

        if cancellation_details.reason == speechsdk.CancellationReason.Error:
            cancellation_error = cancellation_details.error_details

        # 日志记录错误逻辑，上述报错就是在这里触发的
        return

    with open(local_audio_path, "rb") as audio_file:
        audio_data = audio_file.read()

    # 将音频写入Azure Blob存储的逻辑

    # 删除本地文件的逻辑

    return file_url
except Exception as e:
    # 日志记录错误逻辑

已尝试的解决方案 #

安装OpenSSL 1.1的启动脚本 #

创建startup.sh脚本用于环境初始化：

#!/bin/bash

# 记录脚本启动
echo "Starting startup script"

# 更新包列表
echo "Updating package lists"
apt-get update

# 安装依赖
echo "Installing dependencies"
apt-get install -y build-essential libssl-dev ca-certificates libasound2 wget

# 安装OpenSSL 1.1
echo "Installing OpenSSL 1.1"
wget http://security.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2.19_amd64.deb
dpkg -i libssl1.1_1.1.1f-1ubuntu2.19_amd64.deb

# 验证安装
echo "Verifying OpenSSL installation"
openssl version

# 记录脚本结束
echo "Startup script completed"

配置环境变量 #

为函数应用添加以下环境变量：

WEBSITE_STARTUP_SCRIPT=startup.sh
WEBSITE_RUN_FROM_PACKAGE=1

其他排查操作 #

• 确认Azure AI Speech的API密钥和区域配置正确（已在函数应用中留存记录）
• 在Azure AI Speech服务的访问控制（IAM）中，将函数应用添加为Azure AI Developer角色
• 多次重新部署并重启函数应用

以上操作均未解决问题。

内容的提问来源于stack exchange，提问作者Robin