Using plugins/ecr I am fine to build and push image to one ECR server with several tags.
My request is, I need to push this image to several ECR registry servers, but only build once.
Any easy way for me to do that?
There is not an existing plugin that will publish to multiple registry services, however, you could take the existing plugin, fork, and customize to meet your exact needs https://github.com/drone-plugins/drone-ecr