元数据中的启动脚本未运行(Python，Google Compute Engine，云存储触发器) [英] Startup Script in Metadata Not Running (Python, Google Compute Engine, Cloud Storage Trigger)

问题描述

我有一个在Google App Engine上运行的应用程序和一个在Google Compute Engine上运行的AI.我触发VM实例从Google Cloud Storage存储桶中的更改开始，并且有一个启动脚本，我尝试将其存储在GCE实例的元数据中.我的云功能看起来像这样:

I have an app running on Google App Engine, and an AI running on Google Compute Engine. I'm triggering the VM instance to start on a change in a Google Cloud Storage bucket, and have a start-up script that I attempt to store in the metadata of the GCE instance. My cloud functions looks like this:

import os
from googleapiclient.discovery import build


def start(event, context):
    file = event
    print(file["id"])

    string = file["id"]

    new_string = string.split('/')
    user_id = new_string[1]
    payment_id = new_string[2]
    name = new_string[3]

    print(name)

    if name == "uploadcomplete.txt":
        startup_script = """ #! /bin/bash
                sudo su username
                cd directory/directory
                python analysis.py -- gs://location/{userId}/{paymentId}
                """.format(userId=user_id, paymentId=payment_id)
        # initialize compute api
        service = build('compute', 'v1', cache_discovery=False)
        print('VM Instance starting')
        project = 'zephyrd'
        zone = 'us-east1-c'
        instance = 'zephyr-a'

        # get metadata fingerprint in order to set new metadata
        metadata = service.instances().get(project=project, zone=zone, instance=instance)
        metares = metadata.execute()
        fingerprint = metares["metadata"]["fingerprint"]

        # set new metadata
        bodydata = {"fingerprint": fingerprint,
                    "items": [{"key": "startup-script", "value": startup_script}]}
        meta = service.instances().setMetadata(project=project, zone=zone, instance=instance,
                                               body=bodydata).execute()
        print(meta)

        # confirm new metdata
        instanceget = service.instances().get(project=project, zone=zone, instance=instance).execute()
        print("'New Metadata:", instanceget['metadata'])
        print(instanceget)

        # start VM
        request = service.instances().start(project=project, zone=zone, instance=instance)
        response = request.execute()
        print('VM Instance started')
        print(response)

VM已启动，但启动脚本未运行.出于问题的考虑，脚本已简化，但这只是我尝试运行的基本命令.我将脚本直接添加到控制台中的元数据，但是我使用云函数触发器中的值在VM中运行命令.我想念什么?

The VM starts, but the startup script does not run. The script has been simplified for the purposes of the question, but this is just a basic command I'm trying to run. I would add the script directly to the metadata in the console, but I use values from the cloud function trigger to run commands in the VM. What am I missing?

我试图通过两种方式设置元数据:

I've attempted to set the metadata in two ways:

"items": [{"key": "startup-script", "value": startup_script}]

以及:

"items": [{"startup-script" : startup_script}]

均无效.如果我在外壳中手动键入命令，这些命令可以很好地运行.

Neither work. The commands run beautifully if I manually type them in the shell.

推荐答案

查看您的日志以确定其为什么不执行.

Look into your logs to determine why its not executing.

https://cloud.google.com/compute/docs/startupscript#viewing_startup_script_logs

可能是您的问题是您试图执行python脚本而不是bash脚本.

Probably you the issue is that you are trying to execute a python script instead of a bash script.

您的启动脚本应类似于:

Your startup script should be something like:

#! /bin/bash

# ...
python3 paht/to/python_script.py

这篇关于元数据中的启动脚本未运行(Python，Google Compute Engine，云存储触发器)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！