Question

我正在使用以下Cloud Formation模板创建一个EC2实例。将此模板命名为＆＃39; dinesh.json ＆＃39;。

{
  "AWSTemplateFormatVersion" : "2010-09-09",
  "Description" : "Dinesh template",
  "Resources" : {
    "MyEC2Instance" : {
      "Type" : "AWS::EC2::Instance",
      "Properties" : {
        "ImageId" : "ami-775e4f16",
        "InstanceType" : "t2.micro",
        "KeyName" : "****"
       }
    }
  }
}

现在，使用boto3库，我将启动上述模板。

import boto3
cft = boto3.client('cloudformation')
create_cft = cft.create_stack(StackName="Dinesh",TemplateURL=r'https://s3-us-west-2.amazonaws.com/dsp-bucket/dinesh.json')
print create_cft

这是成功运行并获得如下输出：

{u'StackId': 'arn:aws:cloudformation:us-west-2:089691119308:stack/Dinesh/5b573240-548a-11e6-90a0-50a68a0bca36', 'ResponseMetadata': {'HTTPStatusCode': 200, 'RequestId': '5b507be9-548a-11e6-8405-55192e2be20a', 'HTTPHeaders': {'x-amzn-requestid': '5b507be9-548a-11e6-8405-55192e2be20a', 'date': 'Thu, 28 Jul 2016 06:13:09 GMT', 'content-length': '376', 'content-type': 'text/xml'}}}

现在，我想获取上面创建的EC2实例的信息，如公共IP，私有IP和其他信息。

那么，任何人都可以建议我如何检索这个特定EC2实例的信息吗？

除了boto3之外，请让我知道上述事情的各种方法。

Answer 1

使用GetAtt功能。例如，如果您创建了一个名为bob的ec2，那么将其添加到Output部分将显示privip

    "Outputs": {
        "AddressOfbob": {
            "Description": "Domainame",
            "Value": {
                            "Fn::GetAtt": [
                            "bob",
                            "PrivateIp"
                      ]

            }
        }
}

Answer 2

感谢@Vorsprung指向正确的方向。除此之外，我还添加了一些描述性答案。

方法1

当云形成模板中存在“输出”部分时获取EC2实例信息

print "<table>";
print "<tr>";
    for ($x=0; $x <=10; $x++)
    {
        print "<th>$keys[$x]</th>";
    }
print "</tr>";
print "<tr>";
    for ($x=0; $x <=10; $x++)
    {
        print "<td>$step[$x]</td>";
    }
print "</tr>";

输出

import boto3
import time
cft = boto3.client('cloudformation')
create_cft = cft.create_stack(StackName="Dinesh-1",TemplateURL=r'https://s3-us-west-2.amazonaws.com/bucket/dinesh.json')
print "Create Stack o/p - ",create_cft

#Just adding sleep so that stack creation come to the status of CREATE_COMPLETE
#More logic can be added to check the status of stack creation programmatically.
time.sleep(120)

des_stack = cft.describe_stacks(StackName="Dinesh-1")
print "Describe Stack o/p - ",des_stack

在describe_stack输出中，您将获得已创建的EC2实例的公共IP和私有IP。

方法2

当云形成模板中存在否“输出”部分时获取EC2实例信息

Create Stack o/p -  {u'StackId': 'arn:aws:cloudformation:us-west-2:089691119308:stack/Dinesh-1/a92318a0-54a7-11e6-b050-50d0184f2', 'ResponseMetadata': {'HTTPStatusCode': 200, 'RequestId': 'a91c023-54a7-11e6-ba43-67cc9d6ed45b', 'HTTPHeaders': {'x-amzn-requestid': 'a91c023-54a7-11e6-ba43-67cc9d6ed45b', 'date': 'Thu, 28 Jul 2016 09:42:55 GMT', 'content-length': '378', 'content-type': 'text/xml'}}}
Describe Stack o/p -  {u'Stacks': [{u'StackId': 'arn:aws:cloudformation:us-west-2:089691119308:stack/Dinesh-1/a92318a0-54a7-11e6-b050-50a0184f2', u'Description': 'Dinesh template', u'Tags': [], u'Outputs': [{u'Description': 'Private IP', u'OutputKey': 'PrivateIP', u'OutputValue': '172.3.28.221'}, {u'Description': 'Public IP', u'OutputKey': 'PublicIP', u'OutputValue': '52.5.203.173'}], u'CreationTime': datetime.datetime(2016, 7, 28, 9, 42, 55, 624000, tzinfo=tzutc()), u'StackName': 'Dinesh-1', u'NotificationARNs': [], u'StackStatus': 'CREATE_COMPLETE', u'DisableRollback': False}], 'ResponseMetadata': {'HTTPStatusCode': 200, 'RequestId': 'f19dc8ce-54a7-11e6-83e8-01451bce0ba', 'HTTPHeaders': {'x-amzn-requestid': 'f19dc8ce-54a7-11e6-83e8-01451b7ce0a', 'date': 'Thu, 28 Jul 2016 09:44:57 GMT', 'content-length': '1158', 'content-type': 'text/xml'}}}

输出

import boto3
import time
cft = boto3.client('cloudformation')
create_cft = cft.create_stack(StackName="Dinesh-2",TemplateURL=r'https://s3-us-west-2.amazonaws.com/dsp-bucket/dinesh.json')
print "Create Stack o/p - ",create_cft

#Just adding sleep so that stack creation come to the status of CREATE_COMPLETE
#More logic can be added to check the status of stack creation programmatically.
time.sleep(120)

list_stack_resp = cft.list_stack_resources(StackName="Dinesh-2")
print list_stack_resp

在list_stack_resource的输出中，获取'PhysicalResourceId'，在这种情况下为'i-059f15aa'。

然后获取ec2的describe_instance的输出以获取上面创建的EC2实例的完整信息。

Create Stack o/p -  {u'StackId': 'arn:aws:cloudformation:us-west-2:089691119308:stack/Dinesh-2/7238154a8-11e6-9694-50a686be73f2', 'ResponseMetadata': {'HTTPStatusCode': 200, 'RequestId': '7234f160-54a8-11e6-bda6-ef311cece04b', 'HTTPHeaders': {'x-amzn-requestid': '7234f160-54a8-11e6-bda6-ef311cece04b', 'date': 'Thu, 28 Jul 2016 09:48:32 GMT', 'content-length': '378', 'content-type': 'text/xml'}}}
{'ResponseMetadata': {'HTTPStatusCode': 200, 'RequestId': 'baabaa79-54a8-11e6-90e7-9ba061bfa4c', 'HTTPHeaders': {'x-amzn-requestid': 'baabaa79-54a8-11e6-90e7-9bad061bf4c', 'date': 'Thu, 28 Jul 2016 09:50:33 GMT', 'content-length': '687', 'content-type': 'text/xml'}}, u'StackResourceSummaries': [{u'ResourceType': 'AWS::EC2::Instance', u'PhysicalResourceId': 'i-059f15aa', u'LastUpdatedTimestamp': datetime.datetime(2016, 7, 28, 9, 49, 23, 481000, tzinfo=tzutc()), u'ResourceStatus': 'CREATE_COMPLETE', u'LogicalResourceId': 'MyEC2Instance'}]}

输出

import boto3

ec2 = boto3.client('ec2')
ec2_resp = ec2.describe_instances(InstanceIds=['i-059f15aa'])
print ec2_resp

使用云形成模板

2 个答案: