[patch] add support for creating required repositories in aws ecr

[terenceq]

AWS Elastic Container Registry mirroring support

Provide support for mirroring images to AWS Elastic Container Registry (ECR) instances.

Description

In order to select ECR instances as the target registry for mirroring the capability to create the required ECR repositories must be provided. That is each image that will be mirrored needs to have the applicable ECR repository created in advance. For example the AWS cli command must be executed before an image can be uploaded:

aws ecr create-repository --repository-name {image_repo_name} --region {registry_ecr_aws_region}"

In order to use ECR as a target registry the following env variables should be set:

export REGISTRY_PRIVATE_HOST={AWS ECR host}
export REGISTRY_PRIVATE_PORT=443
export REGISTRY_USERNAME=AWS
export REGISTRY_PASSWORD= {AWS ECR login token}
MIRROR_TARGET_IS_ECR=true
AWS_ECR_REGION={AWS region where ECR instance is located}

Before the applicable mirroring command is invoked the following should be satisfied:

• aws cli available in the current path
• aws credentials configured so that the aws ecr create-repository may succeed

Test Results

Successfully mirrored several catalogs/channels to various AWS ECR instances.

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