如何使用 Amazon PHP SDK 2 获取 EC2 实例列表？

Question

如何使用AWS SDK for PHP 2 获取与某些过滤器匹配的 Amazon EC2 实例列表？

Answer 1

为此使用DescribeInstances 方法。让我们详细介绍一下。

您需要先获取 Ec2Client 实例。初始化客户端的最简单方法：

$config = array();
$config['key'] = 'key';
$config['secret'] = 'secret';
$config['region'] = 'us-east-1';
$config['version'] = 'latest'; // Or Specified
$ec2Client = \Aws\Ec2\Ec2Client::factory($config);

然后只需调用DescribeInstances 方法。

$result = $ec2Client->DescribeInstances(array(
        'Filters' => array(
                array('Name' => 'instance-type', 'Values' => array('m1.small')),
        )
));

您可以在 Amazon DescribeInstances API 方法页面上获取可用过滤器列表。

但是等等，这里有什么困难？

• 注意参数名称Filters。在 API 中，它被称为 Filter
• 参数Values与API调用不同，是一个数组

是的，这一切都在文档中进行了描述。但是，如果您查看一些 Old API usage samples，您会发现语法发生了变化，这可能很难注意到该示例中必须更新哪些内容才能使事情正常运行。

为了完成这个例子，让我展示一些简单的结果输出。

$reservations = $result['Reservations'];
foreach ($reservations as $reservation) {
    $instances = $reservation['Instances'];
    foreach ($instances as $instance) {

        $instanceName = '';
        foreach ($instance['Tags'] as $tag) {
            if ($tag['Key'] == 'Name') {
                $instanceName = $tag['Value'];
            }
        }


        echo 'Instance Name: ' . $instanceName . PHP_EOL;
        echo '---> State: ' . $instance['State']['Name'] . PHP_EOL;
        echo '---> Instance ID: ' . $instance['InstanceId'] . PHP_EOL;
        echo '---> Image ID: ' . $instance['ImageId'] . PHP_EOL;
        echo '---> Private Dns Name: ' . $instance['PrivateDnsName'] . PHP_EOL;
        echo '---> Instance Type: ' . $instance['InstanceType'] . PHP_EOL;
        echo '---> Security Group: ' . $instance['SecurityGroups'][0]['GroupName'] . PHP_EOL;
    }

}

Answer 2

Victor 的回答很棒，但它对我不起作用，因为我漏掉了一行：

$reservations=$result->toArray();

Amazon PHP SDK 2 为许多事情（包括这个）返回 Guzzle 模型对象，并且需要在 foreach 工作之前将它们转换为数组。更多信息在这里：

http://guzzlephp.org/api/class-Guzzle.Service.Resource.Model.html

Answer 3

这对维克多很有帮助， 嘿 voidstin，在我的情况下不需要 [$reservations=$result->toArray();]

require "aws.phar";

use Aws\Ec2\Ec2Client;
use Aws\Common\Enum\Region; 

$aws = Ec2Client::factory(array(
'key' => 'XXXXXX',  //Your key and secret key are found at https://portal.aws.amazon.com/gp/aws/securityCredentials
'secret' => 'XXXXXX',
'region' => 'XXXXXX'  //This is the server cluster we are connecting to.  US_EAST_1 is Northern Virginia.  US_WEST_1 is Northern California.  US_WEST_2 is Oregon
));

$result = $aws->DescribeInstances();

$reservations = $result['Reservations'];
foreach ($reservations as $reservation) {
$instances = $reservation['Instances'];
foreach ($instances as $instance) {
$instanceName = '';
foreach ($instance['Tags'] as $tag) {
if ($tag['Key'] == 'Name') {
$instanceName = $tag['Value'];
}
}
echo 'Instance Name: ' . $instanceName . PHP_EOL;
echo '<br>';
echo '---> State: ' . $instance['State']['Name'] . PHP_EOL;
echo '<br>';
echo '---> Instance ID: ' . $instance['InstanceId'] . PHP_EOL;
echo '<br>';
echo '---> Image ID: ' . $instance['ImageId'] . PHP_EOL;
echo '<br>';
echo '---> Private Dns Name: ' . $instance['PrivateDnsName'] . PHP_EOL;
echo '<br>';
echo '---> Instance Type: ' . $instance['InstanceType'] . PHP_EOL;
echo '<br>';
echo '---> Security Group: ' . $instance['SecurityGroups'][0]['GroupName'] . PHP_EOL;
echo '<br>';
echo '-----------------------------------------------------------------------------------------------------';
echo '<br>';
echo '<br>';
}
}

Answer 4

为了获取PublicDnsName 的列表，您可以使用以下代码：

use Aws\Ec2\Ec2Client;

$ec2 = Ec2Client::factory($config);
$args = [
    'Filters' => [
        ['Name' => 'tag:Name', 'Values' => ['*{{your-tag}}*']],
    ]
];
$data = $ec2->DescribeInstances($args)->toArray();
$instances = [];
array_walk_recursive($data, function ($value, $key) use (&$instances) {
    if ($key === 'PublicDnsName') {
        $instances[$value] = true;
    }
});
var_export($instances);

你会收到这样的东西：

array (
  'ec2-*-*-*-*.eu-west-1.compute.amazonaws.com' => true,
  'ec2-*-*-*-*.eu-west-1.compute.amazonaws.com' => true,
  'ec2-*-*-*-*.eu-west-1.compute.amazonaws.com' => true,
  'ec2-*-*-*-*.eu-west-1.compute.amazonaws.com' => true,
  'ec2-*-*-*-*.eu-west-1.compute.amazonaws.com' => true,
  'ec2-*-*-*-*.eu-west-1.compute.amazonaws.com' => true,
)