AWS CloudFormation Support
Fixing AWS CDK bootstrap and deployment errors.
The CDK needs a bootstrap stack in every account and region it deploys to, and many deploy errors trace back to it: missing, outdated or unable to be assumed. We diagnose the exact message and fix the environment, not just rerun the command.
When You Need This
The situations where this work pays for itself.
Signs it is time
- You see "This stack uses assets, so the toolkit stack must be deployed"
- The error mentions a bootstrap version that is too old
- cdk deploy fails assuming a role or publishing assets
- Cross-account or pipeline deployments fail
- Deployment fails only in one region or account
What you get
- Bootstrapped accounts and regions with a documented qualifier
- Fixed trust and permissions for pipelines
- A CI process with cdk diff and pinned versions
- A troubleshooting guide for your team
How we do it
A clear, safe process you can follow along with.
1. Read the exact error and target
We confirm which account and region the CLI resolves, since many errors come from deploying to an environment that was never bootstrapped or from the wrong profile.
2. Check the bootstrap stack
We look for the CDKToolkit stack and its version output in the account and region. If missing, we run cdk bootstrap aws://ACCOUNT/REGION. If old, re-running bootstrap upgrades it.
3. Match the qualifier
If the app or bootstrap used a custom qualifier, the synthesizer in the code must use the same one, or the CLI looks for roles and buckets that do not exist.
4. Fix role assumption
The CLI assumes deploy, file-publishing and image-publishing roles. We check the calling identity can assume them, and for cross-account use that bootstrap was run with --trust for the deploying account.
5. Resolve asset and permission errors
Asset failures may come from an S3 bucket policy, KMS key, ECR repository or a deleted bucket. We check them, and on a CloudFormation level look at the failing resource event.
6. Stabilize the pipeline
We pin the CDK CLI and library versions, bootstrap every target environment as code or a documented step, use cdk diff in review and verify with a clean deploy.
Mistakes we help you avoid
Common ways this goes wrong, and what we do instead.
Bootstrapping only one region
Each region you deploy to needs its own bootstrap stack.
Deleting the CDKToolkit stack
Existing stacks depend on its bucket and roles. Do not delete it.
Mismatched CLI and library versions
A new library may need a newer bootstrap version.
Running with admin keys locally and different roles in CI
Errors then appear only in the pipeline.
Frequently Asked Questions
What does cdk bootstrap do?
It deploys the CDKToolkit stack, creating the S3 bucket, ECR repository and IAM roles the CDK uses to publish assets and deploy in that account and region.
Why do I get "bootstrap stack version is too old"?
Your app requires a newer bootstrap version than the account has. Re-run cdk bootstrap for that account and region to upgrade it.
Do I need to bootstrap every account?
Yes, each account and region that CDK deploys into needs bootstrapping, including cross-account pipeline targets.
Want Help With Fixing AWS CDK bootstrap and deployment errors?
Schedule an appointment. Tell us about your environment and we will outline the safest, highest-value approach.
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