Google

Currently I am working on a light-weight PHP class which should help me to create, list and delete VM instances on Googles Compute Engine. While writing the class, I came across few issue I would like to share with you. In the following example I tried to create a micro instance, because didn’t need much computing power. As you probably know, here is how you can select the machine type via dashboard.

When I tried to create a micro instance via PHP API with the correct Machine Type I received the following error message.

Fatal error: Uncaught Google_Service_Exception: { "error": { "errors": [ { "domain": "global", "reason": "invalid", "message": "Invalid value for field 'resource.machineType': 'f1-micro'. The URL is malformed." } ], "code": 400, "message": "Invalid value for field 'resource.machineType': 'f1-micro'. The URL is malformed." } }

Fatal error: Uncaught Google_Service_Exception: { "error": { "errors": [ { "domain": "global", "reason": "invalid", "message": "Invalid value for field 'resource.machineType': 'f1-micro'. The URL is malformed." } ], "code": 400, "message": "Invalid value for field 'resource.machineType': 'f1-micro'. The URL is malformed." } }

Here is a part of a PHP file I am using for API connection tests.

<?php

// Load https://github.com/googleapis/google-api-php-client
require 'vendor/autoload.php';
...

// Authenticate
$client = new Google_Client();
...

// Connect to Compute Engine Service
$computeService = new Google_Service_Compute($client);
...

// Update placeholder values
$project = 'project-abc';
$zone = 'us-east1-b';
$instance = 'demo-project';
$machineType = 'f1-micro';

// Create instance inside project-abc
$instanceName = 'my-first-instance';
$newInstance = new Google_Service_Compute_Instance();
$newInstance->setName($instanceName);
$newInstance->setMachineType($machineType);

$response = $computeService->instances->insert($project, $zone, $instanceName);

<?php

// Load https://github.com/googleapis/google-api-php-client

require 'vendor/autoload.php';

...

// Authenticate

$client = new Google_Client();

...

// Connect to Compute Engine Service

$computeService = new Google_Service_Compute($client);

...

// Update placeholder values

$project = 'project-abc';

$zone = 'us-east1-b';

$instance = 'demo-project';

$machineType = 'f1-micro';

// Create instance inside project-abc

$instanceName = 'my-first-instance';

$newInstance = new Google_Service_Compute_Instance();

$newInstance->setName($instanceName);

$newInstance->setMachineType($machineType);

$response = $computeService->instances->insert($project, $zone, $instanceName);

As you can see, I set a string f1-micro which is obviously not valid. I double-checked the API guides and found this URL.

https://www.googleapis.com/compute/v1/projects/{project}/zones/{zone}/machineTypes/{machineType}

1	https://www.googleapis.com/compute/v1/projects/{project}/zones/{zone}/machineTypes/{machineType}

So I defined the value for the machine type as follows which has fixed the invalid value for field resource.machineType.

$machineType = sprintf('https://www.googleapis.com/compute/v1/projects/%s/zones/%s/machineTypes/%s', $project, $zone, $type);
$newInstance->setMachineType($machineType);

1 2	$machineType = sprintf('https://www.googleapis.com/compute/v1/projects/%s/zones/%s/machineTypes/%s', $project, $zone, $type); $newInstance->setMachineType($machineType);