When you create a codebuild you can pass environment variables.
{
"name": "sample-docker-project",
"source": {
"type": "S3",
"location": "codebuild-region-ID-account-ID-input-bucket/DockerSample.zip"
},
"artifacts": {
"type": "NO_ARTIFACTS"
},
"environment": {
"type": "LINUX_CONTAINER",
"image": "aws/codebuild/docker:17.09.0",
"computeType": "BUILD_GENERAL1_SMALL",
"environmentVariables": [
{
"name": "AWS_DEFAULT_REGION",
"value": "region-ID"
},
{
"name": "AWS_ACCOUNT_ID",
"value": "account-ID"
},
{
"name": "IMAGE_REPO_NAME",
"value": "Amazon-ECR-repo-name"
},
{
"name": "IMAGE_TAG",
"value": "latest"
}
]
},
"serviceRole": "arn:aws:iam::account-ID:role/role-name",
"encryptionKey": "arn:aws:kms:region-ID:account-ID:key/key-ID"
}
The in your buildspec.yml you can refer them like regular environment variables with $IMAGE_REPO_NAME.
version: 0.2
phases:
pre_build:
commands:
- echo Logging in to Amazon ECR...
- $(aws ecr get-login --no-include-email --region $AWS_DEFAULT_REGION)
build:
commands:
- echo Build started on `date`
- echo Building the Docker image...
- docker build -t $IMAGE_REPO_NAME:$IMAGE_TAG .
- docker tag $IMAGE_REPO_NAME:$IMAGE_TAG $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME:$IMAGE_TAG
post_build:
commands:
- echo Build completed on `date`
- echo Pushing the Docker image...
- docker push $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME:$IMAGE_TAG
What you can not do is create only 1 codebuild and pass variables to it as a script, so you need to create 2 codebuilds, but 1 buildspec.yml.
More information here: https://docs.aws.amazon.com/codebuild/latest/userguide/sample-docker.html
In addition, you can read the AWS Tutorial to get a clearer view of the concept.
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