Pass AWS CodeBuild IAM Role inside Docker container [unable to locate credentials]

问题

The role configured on CodeBuild project works fine with the runtime environment but doesn't work when we run a command from inside the container, it says "unable to locate credentials".
Let me know how can we use the role out of the box inside the container.

回答1:

You can make use of credential source "EcsContainer" to assume role seamlessly without having to export new credentials in your buildspec.yml.

credential_source - The credential provider to use to get credentials for the initial assume-role call. This parameter cannot be provided alongside source_profile. Valid values are:

Environment to pull source credentials from environment variables.

Ec2InstanceMetadata to use the EC2 instance role as source credentials.

EcsContainer to use the ECS container credentials as the source credentials.

From: https://docs.aws.amazon.com/cli/latest/topic/config-vars.html

Steps:

Step-0: Create a new Role 'arn:aws:iam::0000000000:role/RoleToBeAssumed' and attach required policies to provide the permission required for the commands you are running during the build.

Step-1: Add sts:assumeRole permissions to your CodeBuild Service Role. Here is a sample policy:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "VisualEditor1",
            "Effect": "Allow",
            "Action": "sts:*",
            "Resource": "arn:aws:iam::0000000000:role/RoleToBeAssumed"
        }
    ]
}

Step-2: Configure your build container to use the credential metadata as source for assuming the role. Here is a buildspec example:

version: 0.2

phases:
  install:
    runtime-versions:
      nodejs: 8
    commands:
      - aws sts get-caller-identity
      - mkdir ~/.aws/ && touch ~/.aws/config
      - echo "[profile buildprofile]" > ~/.aws/config
      - echo "role_arn = arn:aws:iam::0000000000:role/RoleToBeAssumed" >> ~/.aws/config
      - echo "credential_source = EcsContainer" >> ~/.aws/config
      - aws sts get-caller-identity --profile buildprofile

回答2:

If you need to run a Docker container in a build environment and the container requires AWS credentials, you must pass through the credentials from the build environment to the container.

docker run -e AWS_DEFAULT_REGION -e AWS_CONTAINER_CREDENTIALS_RELATIVE_URI your-image-tag aws s3 ls

https://docs.aws.amazon.com/codebuild/latest/userguide/troubleshooting.html#troubleshooting-versions

来源：https://stackoverflow.com/questions/60072181/pass-aws-codebuild-iam-role-inside-docker-container-unable-to-locate-credential

标签

amazon-web-services

amazon-iam

aws-codepipeline

aws-codebuild