Setup a CDK project
Install the CDK V1
If you are using Cloud9, the CDK is already pre-installed but it will likely be a the CDK V2. Where this workshop was published for AWS CDK V1. Run the following commands from the Cloud9 terminal to remove your current version we will initialize the pipeline with V1 in a bit:
npm uninstall -g cdk
Initialize project
Now, let’s create a folder within our sam-app directory where the pipeline code will reside.
cd ~/environment/sam-app
mkdir pipeline
cd pipeline
Initialize a new CDK project within the pipeline folder by running the following command:
npx aws-cdk@1.x init app --language python
You will be prompted to install aws-cdk@1.x, go ahead and accept with y.
Now add an alias as cdk for AWS CDK V1:
alias cdk="npx aws-cdk@1.x"
Now install the CDK modules that we will be using to build a pipeline:
python3 -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt
pip install aws-cdk.aws-s3 aws-cdk.aws_codebuild aws-cdk.aws_codecommit aws-cdk.aws_codepipeline aws-cdk.aws_codepipeline_actions
After a few seconds, our new CDK project should look like this:
Project structure
At this point, your project should have the structure below (only the most relevant files and folders are shown). Within the CDK project, the main file you will be interacting with is the pipeline_stack.py. Don’t worry about the rest of the files for now.
sam-app # SAM application root
├── hello_world # Lambda code
├── pipeline
│ ├── app.py # Entry point for CDK project
│ ├── pipeline # CDK project root
│ │ └── pipeline_stack.py # Pipeline definition
│ ├── requirements.txt
│ ├── setup.py
├── samconfig.toml # Config file for manual deployments
└── template.yaml # SAM template
Modify stack name
Open the app.py file, which is your entry point to the CDK project, and change the name of the stack to sam-app-cicd.
Save the file.