If we have a docker-file with root level volumes and we do a kompose up
using that docker-file, libcompose will add an additional _ followed by
the current directory name. Since kubernetes doesn't allow _ in the
objects created so kompose up will fail to deploy it. As a solution we
replace _ to - and we can then deploy it successfully.
Now we can deploy application in different namespaces using the "--namespace=<value>" flag with kompose up and kompose down. The --namepace flag will deploy the application in that particular "namespace" if exist."
Now we can provide service name with "_" in docker-compose files and they will by converted as "-" in the generated artifacts by kompose eg, if the service name in docker-compose file is "foo_bar" then it will be converted into "foo-bar" in the generated artifacts
This PR uses the "SelectorFromSet()" function which takes alabel or
selector as an argument returns all the object that uses that label or
selector. Once we get the object that uses a particular label we can
further do the delete operation on them. This is similar to "kubectl
delete <object> --selector=<key>=<value>". Also the label has been
modified from service to io.kompose.service.
Abhishek