Building and Pushing Container Images to Multiple ECR Registries with Argo Workflows
Using Argo Workflows to build container images with Kaniko and push them to different registries. This post goes over sending the image to multiple ECR repositories in different AWS partitions but it could easily be switched out with another registry (Docker, GitHub, etc.).
Using AWS EKS with IAM OIDC providers set up in two accounts, allows different pods/service accounts to assume permissions in each account.