cdk.context.json is not created. #26410

DariocfTrendzact · 2023-07-18T18:44:45Z

DariocfTrendzact
Jul 18, 2023

Hi everyone,

I have some troubles trying to run an existing project.

The code is trying to create an VPC endpoint, but I receive the following error:

RuntimeError: Can't add a gateway endpoint to VPC; route table IDs are not available

Before this creation, there is a ec2.Vpc.from_lookup call to get the VPC information. As I understand, there must be a cdk.context.json with the VPC information, but is not creating the file. I think I have setted all the environment variables to run the code:

CDK_DEPLOY_REGION=us-east-2
CDK_DEPLOY_ACCOUNT=XXXXXXXXXX
CDK_DEFAULT_ACCOUNT=XXXXXXXXXX
CDK_DEFAULT_REGION=us-east-2
AWS_ACCESS_KEY_ID=XXXXXXXXXXXX
AWS_SECRET_ACCESS_KEY=XXXXXXXXXX
AWS_DEFAULT_REGION=us-east-2

the code is searching with the correct information:

VPC = ec2.Vpc.from_lookup(
            self,
            "vpclookup",
            vpc_name="VPC001"
 )

...

ec2.GatewayVpcEndpoint(
            self,
            "endpoint001",
            vpc=VPC ...

when I try to run the cdk list I'm getting the following output:

$ cdk list -v
[13:24:00] CDK toolkit version: 2.87.0 (build 9fca790)
[13:24:00] Command line arguments: {
  _: [ 'list' ],
  v: 1,
  verbose: 1,
  deployRegion: 'us-east-2',
  deployAccount: 'XXXXXXXXXXXX',
  defaultAccount: 'XXXXXXXXXXXX',
  defaultRegion: 'us-east-2',
  lookups: true,
  'ignore-errors': false,
  ignoreErrors: false,
  json: false,
  j: false,
  debug: false,
  ec2creds: undefined,
  i: undefined,
  'version-reporting': undefined,
  versionReporting: undefined,
  'path-metadata': undefined,
  pathMetadata: undefined,
  'asset-metadata': undefined,
  assetMetadata: undefined,
  'role-arn': undefined,
  r: undefined,
  roleArn: undefined,
  staging: true,
  'no-color': false,
  noColor: false,
  ci: false,
  long: false,
  l: false,
  '$0': 'cdk'
}
[13:24:00] cdk.json: {
  "app": "python3 app.py",
  "watch": {
    "include": [
      "**"
    ],
    "exclude": [
      "README.md",
      "cdk*.json",
      "requirements*.txt",
      "source.bat",
      "**/__init__.py",
      "python/__pycache__",
      "tests"
    ]
  },
  "context": {
    "@aws-cdk/aws-apigateway:usagePlanKeyOrderInsensitiveId": true,
    "@aws-cdk/core:stackRelativeExports": true,
    "@aws-cdk/aws-rds:lowercaseDbIdentifier": true,
    "@aws-cdk/aws-lambda:recognizeVersionProps": true,
    "@aws-cdk/aws-cloudfront:defaultSecurityPolicyTLSv1.2_2021": true,
    "@aws-cdk-containers/ecs-service-extensions:enableDefaultLogDriver": true,
    "@aws-cdk/aws-ec2:uniqueImdsv2TemplateName": true,
    "@aws-cdk/core:checkSecretUsage": true,
    "@aws-cdk/aws-iam:minimizePolicies": true,
    "@aws-cdk/core:target-partitions": [
      "aws",
      "aws-cn"
    ]
  }
}
[13:24:00] merged settings: {
  versionReporting: true,
  assetMetadata: true,
  pathMetadata: true,
  output: 'cdk.out',
  app: 'python3 app.py',
  watch: {
    include: [ '**' ],
    exclude: [
      'README.md',
      'cdk*.json',
      'requirements*.txt',
      'source.bat',
      '**/__init__.py',
      'python/__pycache__',
      'tests'
    ]
  },
  context: {
    '@aws-cdk/aws-apigateway:usagePlanKeyOrderInsensitiveId': true,
    '@aws-cdk/core:stackRelativeExports': true,
    '@aws-cdk/aws-rds:lowercaseDbIdentifier': true,
    '@aws-cdk/aws-lambda:recognizeVersionProps': true,
    '@aws-cdk/aws-cloudfront:defaultSecurityPolicyTLSv1.2_2021': true,
    '@aws-cdk-containers/ecs-service-extensions:enableDefaultLogDriver': true,
    '@aws-cdk/aws-ec2:uniqueImdsv2TemplateName': true,
    '@aws-cdk/core:checkSecretUsage': true,
    '@aws-cdk/aws-iam:minimizePolicies': true,
    '@aws-cdk/core:target-partitions': [ 'aws', 'aws-cn' ]
  },
  debug: false,
  toolkitBucket: {},
  staging: true,
  bundlingStacks: [],
  lookups: true
}
[13:24:00] Determining if we're on an EC2 instance.
[13:24:00] Does not look like an EC2 instance.
[13:24:00] Toolkit stack: CDKToolkit
[13:24:00] Setting "CDK_DEFAULT_REGION" environment variable to us-east-2
[13:24:00] Resolving default credentials
[13:24:00] Reading cached notices from /Users/user/.cdk/cache/notices.json
[13:24:00] Retrieved account ID XXXXXXXXXXXX from disk cache
[13:24:00] Setting "CDK_DEFAULT_ACCOUNT" environment variable to XXXXXXXXXXXX
[13:24:00] context: {
  '@aws-cdk/aws-apigateway:usagePlanKeyOrderInsensitiveId': true,
  '@aws-cdk/core:stackRelativeExports': true,
  '@aws-cdk/aws-rds:lowercaseDbIdentifier': true,
  '@aws-cdk/aws-lambda:recognizeVersionProps': true,
  '@aws-cdk/aws-cloudfront:defaultSecurityPolicyTLSv1.2_2021': true,
  '@aws-cdk-containers/ecs-service-extensions:enableDefaultLogDriver': true,
  '@aws-cdk/aws-ec2:uniqueImdsv2TemplateName': true,
  '@aws-cdk/core:checkSecretUsage': true,
  '@aws-cdk/aws-iam:minimizePolicies': true,
  '@aws-cdk/core:target-partitions': [ 'aws', 'aws-cn' ],
  'aws:cdk:enable-path-metadata': true,
  'aws:cdk:enable-asset-metadata': true,
  'aws:cdk:version-reporting': true,
  'aws:cdk:bundling-stacks': []
}
[13:24:00] outdir: cdk.out
[13:24:00] env: {
  CDK_DEFAULT_REGION: 'us-east-2',
  CDK_DEFAULT_ACCOUNT: 'XXXXXXXXXXXX',
  CDK_OUTDIR: 'cdk.out',
  CDK_CLI_ASM_VERSION: '32.0.0',
  CDK_CLI_VERSION: '2.87.0'
}
[WARNING] aws-cdk-lib.CfnResource#addDependsOn is deprecated.
  use addDependency
  This API will be removed in the next major release.
jsii.errors.JavaScriptError:
  Error: Can't add a gateway endpoint to VPC; route table IDs are not available
      at new GatewayVpcEndpoint (/private/var/folders/r0/ml04w_v94y9327259yr3_bpr0000gp/T/jsii-kernel-tKP3N6/node_modules/aws-cdk-lib/aws-ec2/lib/vpc-endpoint.js:112:19)
      at Kernel._create (/private/var/folders/r0/ml04w_v94y9327259yr3_bpr0000gp/T/tmp4co7vn0j/lib/program.js:9964:29)
      at Kernel.create (/private/var/folders/r0/ml04w_v94y9327259yr3_bpr0000gp/T/tmp4co7vn0j/lib/program.js:9693:29)
      at KernelHost.processRequest (/private/var/folders/r0/ml04w_v94y9327259yr3_bpr0000gp/T/tmp4co7vn0j/lib/program.js:11544:36)
      at KernelHost.run (/private/var/folders/r0/ml04w_v94y9327259yr3_bpr0000gp/T/tmp4co7vn0j/lib/program.js:11504:22)
      at Immediate._onImmediate (/private/var/folders/r0/ml04w_v94y9327259yr3_bpr0000gp/T/tmp4co7vn0j/lib/program.js:11505:46)
      at process.processImmediate (node:internal/timers:471:21)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/user/Documents/Trendzact/cdk/dev/infra/app.py", line 98, in <module>
    vpc_endpoints_stack = VPCEndpointsStack(
  File "/Users/user/Documents/Trendzact/cdk/dev/infra/.venv/lib/python3.10/site-packages/jsii/_runtime.py", line 112, in __call__
    inst = super().__call__(*args, **kwargs)
  File "/Users/user/Documents/Trendzact/cdk/dev/infra/network_content_delivery/vpc/vpc_endpoints/vpc_endpoints.py", line 82, in __init__
    ec2.GatewayVpcEndpoint(
  File "/Users/user/Documents/Trendzact/cdk/dev/infra/.venv/lib/python3.10/site-packages/jsii/_runtime.py", line 112, in __call__
    inst = super().__call__(*args, **kwargs)
  File "/Users/user/Documents/Trendzact/cdk/dev/infra/.venv/lib/python3.10/site-packages/aws_cdk/aws_ec2/__init__.py", line 83770, in __init__
    jsii.create(self.__class__, self, [scope, id, props])
  File "/Users/user/Documents/Trendzact/cdk/dev/infra/.venv/lib/python3.10/site-packages/jsii/_kernel/__init__.py", line 334, in create
    response = self.provider.create(
  File "/Users/user/Documents/Trendzact/cdk/dev/infra/.venv/lib/python3.10/site-packages/jsii/_kernel/providers/process.py", line 363, in create
    return self._process.send(request, CreateResponse)
  File "/Users/user/Documents/Trendzact/cdk/dev/infra/.venv/lib/python3.10/site-packages/jsii/_kernel/providers/process.py", line 340, in send
    raise RuntimeError(resp.error) from JavaScriptError(resp.stack)
RuntimeError: Can't add a gateway endpoint to VPC; route table IDs are not available
[13:24:08] Reading cached notices from /Users/user/.cdk/cache/notices.json

The VPC exists in the region and the name is correct, I have permissions as administrator in the account.

Is there something that I forgot to set? Any env variable?

Answered by peterwoodworth

Jul 19, 2023

Couple things to check/try:

Did you specify the environment in your stack?
Try running cdk synth -v instead, I'm not familiar with exactly what cdk list does under the hood off the top of my head
Try commenting out all parts of your stack except the lookup, and running cdk synth -v. Does the file get generated then? If so, you're probably running into the same bug as described here

View full answer

peterwoodworth · 2023-07-19T20:19:39Z

peterwoodworth
Jul 19, 2023

Couple things to check/try:

Did you specify the environment in your stack?
Try running cdk synth -v instead, I'm not familiar with exactly what cdk list does under the hood off the top of my head
Try commenting out all parts of your stack except the lookup, and running cdk synth -v. Does the file get generated then? If so, you're probably running into the same bug as described here

2 replies

DariocfTrendzact Jul 19, 2023
Author

Thank you @peterwoodworth

Commenting the code resolved my problem, I really appreciate your help.

Rizxcviii May 11, 2026

Just commenting, in 2026 this worked for me as well.

2023-12-01T20:25:46Z

github-actions[bot]
Bot Dec 1, 2023

Hello! Reopening this discussion to make it searchable.

0 replies

sarma-nci-nih-essex · 2025-03-28T14:49:51Z

sarma-nci-nih-essex
Mar 28, 2025

In my case, the cdk-synth STOPPED updating cdk.context.json. No idea when it did, as this project is over 2 yrs old.

To the point noted by @peterwoodworth ..
using -v (a.k.a. verbose cli-flag) should give you a clue as to what's going on.

In my case, I could clearly see the following:

[10:42:48] Looking up AWS region in the EC2 Instance Metadata Service (IMDS).
[10:42:49] Unable to retrieve AWS region from IMDS: Error: Error fetching metadata token: TimeoutError: Socket timed out without establishing a connection within 1000 ms
[10:42:49] Unable to determine AWS region from environment or AWS configuration (profile: "EssexCloud-DEV"), defaulting to 'us-east-1'
[10:42:50] Toolkit stack: CDKToolkit
[10:42:50] Setting "CDK_DEFAULT_REGION" environment variable to us-east-1
[10:42:50] Retrieved account ID 123456789012 from disk cache
[10:42:50] Setting "CDK_DEFAULT_ACCOUNT" environment variable to 123456789012

FYI: My env parameter passed into aws_cdk.Stack construct is:-

env = Environment(
        account=os.environ["CDK_DEFAULT_ACCOUNT"],
        region=os.environ["CDK_DEFAULT_REGION"],
)

$ npx cdk --version
2.1005.0 (build be378de)

I printed out env for debugging purposes, and it is just fine.
FYI: I also pass in --profile and --region CLI-args to the npx cdk command.

Update

Running the following command .. got rid of that (above noted) error message.

aws configure --profile ${AWSPROFILE} --region ${AWSREGION}

But, STILL --NO-- ❌ cdk.context.json !!

3 replies

Sunbelt Computer Software

PL/B Language Development and Support

cdk.context.json is not created. #26410

Uh oh!

Uh oh!

DariocfTrendzact Jul 18, 2023

Replies: 3 comments · 5 replies

Uh oh!

peterwoodworth Jul 19, 2023

Uh oh!

DariocfTrendzact Jul 19, 2023 Author

Uh oh!

Rizxcviii May 11, 2026

Uh oh!

github-actions[bot] Bot Dec 1, 2023

Uh oh!

Uh oh!

sarma-nci-nih-essex Mar 28, 2025

Update

Uh oh!

sarma-nci-nih-essex Mar 28, 2025

Uh oh!

TristanMalbran Jun 10, 2025

Uh oh!

sarma-nci-nih-essex Jun 10, 2025

DariocfTrendzact
Jul 18, 2023

Replies: 3 comments 5 replies

peterwoodworth
Jul 19, 2023

DariocfTrendzact Jul 19, 2023
Author

github-actions[bot]
Bot Dec 1, 2023

sarma-nci-nih-essex
Mar 28, 2025