amazon web services - How to import existing VPC in aws cdk?

Question

Hi I am working on aws cdk. I am trying to get existing non-default vpc. I tried below options.

vpc = ec2.Vpc.from_lookup(self, id = "VPC", vpc_id='vpcid', vpc_name='vpc-dev')

This results in below error

[Error at /LocationCdkStack-cdkstack] Request has expired.
[Warning at /LocationCdkStack-cdkstack/TaskDef/mw-service] Proper policies need to be attached before pulling from ECR repository, or use 'fromEcrRepository'.
Found errors

Other method I tried is

vpc = ec2.Vpc.from_vpc_attributes(self, 'VPC', vpc_id='vpc-839227e7', availability_zones=['ap-southeast-2a','ap-southeast-2b','ap-southeast-2c'])

This results in

[Error at /LocationCdkStack-cdkstack] Request has expired.
[Warning at /LocationCdkStack-cdkstack/TaskDef/mw-service] Proper policies need to be attached before pulling from ECR repository, or use 'fromEcrRepository'.
Found errors

Other method I tried is

vpc = ec2.Vpc.from_lookup(self, id = "VPC", is_default=True) // This will get default vpc and this will work

Can someone help me to get non-default vpc in aws cdk? Any help would be appreciated. Thanks

Answer 1

Take a look at aws_cdk.aws_ec2 documentation and at CDK Runtime Context.

If your VPC is created outside your CDK app, you can use Vpc.fromLookup(). The CDK CLI will search for the specified VPC in the the stack’s region and account, and import the subnet configuration. Looking up can be done by VPC ID, but more flexibly by searching for a specific tag on the VPC.

Usage:

# Example automatically generated. See https://github.com/aws/jsii/issues/826
from aws_cdk.core import App, Stack, Environment
from aws_cdk import aws_ec2 as ec2

# Information from environment is used to get context information
# so it has to be defined for the stack
stack = MyStack(
    app, "MyStack", env=Environment(account="account_id", region="region")
)

# Retrieve VPC information
vpc = ec2.Vpc.from_lookup(stack, "VPC",
    # This imports the default VPC but you can also
    # specify a 'vpcName' or 'tags'.
    is_default=True
)

Update with a relevant example:

vpc = ec2.Vpc.from_lookup(stack, "VPC",
    vpc_id = VPC_ID
)

Update with typescript example:

import ec2 = require('@aws-cdk/aws-ec2');
const getExistingVpc = ec2.Vpc.fromLookup(this, 'ImportVPC',{isDefault: false,vpcId: vpcId });

More info here.