Use DescribeVpcs
with an Amazon SDK or CLI
The following code examples show how to use DescribeVpcs
.
Action examples are code excerpts from larger programs and must be run in context. You can see this action in context in the following code example:
- .NET
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- Amazon SDK for .NET
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Note
There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository
. /// <summary> /// Get the default VPC for the account. /// </summary> /// <returns>The default VPC object.</returns> public async Task<Vpc> GetDefaultVpc() { try { var vpcResponse = await _amazonEc2.DescribeVpcsAsync( new DescribeVpcsRequest() { Filters = new List<Amazon.EC2.Model.Filter>() { new("is-default", new List<string>() { "true" }) } }); return vpcResponse.Vpcs[0]; } catch (AmazonEC2Exception ec2Exception) { if (ec2Exception.ErrorCode == "UnauthorizedOperation") { _logger.LogError(ec2Exception, $"You do not have the necessary permissions to describe VPCs."); } throw; } catch (Exception ex) { _logger.LogError(ex, $"An error occurred while describing the vpcs.: {ex.Message}"); throw; } }
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For API details, see DescribeVpcs in Amazon SDK for .NET API Reference.
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- CLI
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- Amazon CLI
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Example 1: To describe all of your VPCs
The following
describe-vpcs
example retrieves details about your VPCs.aws ec2 describe-vpcs
Output:
{ "Vpcs": [ { "CidrBlock": "30.1.0.0/16", "DhcpOptionsId": "dopt-19edf471", "State": "available", "VpcId": "vpc-0e9801d129EXAMPLE", "OwnerId": "111122223333", "InstanceTenancy": "default", "CidrBlockAssociationSet": [ { "AssociationId": "vpc-cidr-assoc-062c64cfafEXAMPLE", "CidrBlock": "30.1.0.0/16", "CidrBlockState": { "State": "associated" } } ], "IsDefault": false, "Tags": [ { "Key": "Name", "Value": "Not Shared" } ] }, { "CidrBlock": "10.0.0.0/16", "DhcpOptionsId": "dopt-19edf471", "State": "available", "VpcId": "vpc-06e4ab6c6cEXAMPLE", "OwnerId": "222222222222", "InstanceTenancy": "default", "CidrBlockAssociationSet": [ { "AssociationId": "vpc-cidr-assoc-00b17b4eddEXAMPLE", "CidrBlock": "10.0.0.0/16", "CidrBlockState": { "State": "associated" } } ], "IsDefault": false, "Tags": [ { "Key": "Name", "Value": "Shared VPC" } ] } ] }
Example 2: To describe a specified VPC
The following
describe-vpcs
example retrieves details for the specified VPC.aws ec2 describe-vpcs \ --vpc-ids
vpc-06e4ab6c6cEXAMPLE
Output:
{ "Vpcs": [ { "CidrBlock": "10.0.0.0/16", "DhcpOptionsId": "dopt-19edf471", "State": "available", "VpcId": "vpc-06e4ab6c6cEXAMPLE", "OwnerId": "111122223333", "InstanceTenancy": "default", "CidrBlockAssociationSet": [ { "AssociationId": "vpc-cidr-assoc-00b17b4eddEXAMPLE", "CidrBlock": "10.0.0.0/16", "CidrBlockState": { "State": "associated" } } ], "IsDefault": false, "Tags": [ { "Key": "Name", "Value": "Shared VPC" } ] } ] }
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For API details, see DescribeVpcs
in Amazon CLI Command Reference.
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- JavaScript
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- SDK for JavaScript (v3)
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Note
There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository
. const client = new EC2Client({}); const { Vpcs } = await client.send( new DescribeVpcsCommand({ Filters: [{ Name: "is-default", Values: ["true"] }], }), );
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For API details, see DescribeVpcs in Amazon SDK for JavaScript API Reference.
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- PowerShell
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- Tools for PowerShell
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Example 1: This example describes the specified VPC.
Get-EC2Vpc -VpcId vpc-12345678
Output:
CidrBlock : 10.0.0.0/16 DhcpOptionsId : dopt-1a2b3c4d InstanceTenancy : default IsDefault : False State : available Tags : {Name} VpcId : vpc-12345678
Example 2: This example describes the default VPC (there can be only one per region). If your account supports EC2-Classic in this region, there is no default VPC.
Get-EC2Vpc -Filter @{Name="isDefault"; Values="true"}
Output:
CidrBlock : 172.31.0.0/16 DhcpOptionsId : dopt-12345678 InstanceTenancy : default IsDefault : True State : available Tags : {} VpcId : vpc-45678901
Example 3: This example describes the VPCs that match the specified filter (that is, have a CIDR that matches the value '10.0.0.0/16' and are in the state 'available').
Get-EC2Vpc -Filter @{Name="cidr"; Values="10.0.0.0/16"},@{Name="state";Values="available"}
Example 4: This example describes all your VPCs.
Get-EC2Vpc
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For API details, see DescribeVpcs
in Amazon Tools for PowerShell Cmdlet Reference.
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- Python
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- SDK for Python (Boto3)
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Note
There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository
. class AutoScalingWrapper: """ Encapsulates Amazon EC2 Auto Scaling and EC2 management actions. """ def __init__( self, resource_prefix: str, inst_type: str, ami_param: str, autoscaling_client: boto3.client, ec2_client: boto3.client, ssm_client: boto3.client, iam_client: boto3.client, ): """ Initializes the AutoScaler class with the necessary parameters. :param resource_prefix: The prefix for naming AWS resources that are created by this class. :param inst_type: The type of EC2 instance to create, such as t3.micro. :param ami_param: The Systems Manager parameter used to look up the AMI that is created. :param autoscaling_client: A Boto3 EC2 Auto Scaling client. :param ec2_client: A Boto3 EC2 client. :param ssm_client: A Boto3 Systems Manager client. :param iam_client: A Boto3 IAM client. """ self.inst_type = inst_type self.ami_param = ami_param self.autoscaling_client = autoscaling_client self.ec2_client = ec2_client self.ssm_client = ssm_client self.iam_client = iam_client sts_client = boto3.client("sts") self.account_id = sts_client.get_caller_identity()["Account"] self.key_pair_name = f"{resource_prefix}-key-pair" self.launch_template_name = f"{resource_prefix}-template-" self.group_name = f"{resource_prefix}-group" # Happy path self.instance_policy_name = f"{resource_prefix}-pol" self.instance_role_name = f"{resource_prefix}-role" self.instance_profile_name = f"{resource_prefix}-prof" # Failure mode self.bad_creds_policy_name = f"{resource_prefix}-bc-pol" self.bad_creds_role_name = f"{resource_prefix}-bc-role" self.bad_creds_profile_name = f"{resource_prefix}-bc-prof" def get_default_vpc(self) -> Dict[str, Any]: """ Gets the default VPC for the account. :return: Data about the default VPC. """ try: response = self.ec2_client.describe_vpcs( Filters=[{"Name": "is-default", "Values": ["true"]}] ) except ClientError as err: error_code = err.response["Error"]["Code"] log.error("Failed to retrieve the default VPC.") if error_code == "UnauthorizedOperation": log.error( "You do not have the necessary permissions to describe VPCs. " "Ensure that your AWS IAM user or role has the correct permissions." ) elif error_code == "InvalidParameterValue": log.error( "One or more parameters are invalid. Check the request parameters." ) log.error(f"Full error:\n\t{err}") else: if "Vpcs" in response and response["Vpcs"]: log.info(f"Retrieved default VPC: {response['Vpcs'][0]['VpcId']}") return response["Vpcs"][0] else: pass
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For API details, see DescribeVpcs in Amazon SDK for Python (Boto3) API Reference.
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For a complete list of Amazon SDK developer guides and code examples, see Create Amazon EC2 resources using an Amazon SDK. This topic also includes information about getting started and details about previous SDK versions.