docker build -t $NAMESPACE/$APP_NAME:$BUILD_SHA1 .
docker tag $NAMESPACE/$APP_NAME:$SHA1  $DOCKER_REGISTRY/$NAMESPACE/$APP_NAME:$SHA1
docker push $DOCKER_REGISTRY/$NAMESPACE/$APP_NAME:$SHA1

然后你拉特定的标签

docker pull $DOCKER_REGISTRY/$NAMESPACE/$APP_NAME:$SHA1