Modifying public members of Cortex.

[srijan55]

We are trying to use Cortex in frontend-only mode and to add some layers to it we found that we were able to modify some public members to achieve our scenarios. For example -

• Modify HTTPAuthMiddleware in

  cortex/pkg/api/api.go

  Line 89 in e65da18

  type API struct {

  to add extra layer of authentication checks
• Modify Logger

  cortex/pkg/util/log/log.go

  Line 19 in e65da18

  Logger = kitlog.NewNopLogger()

  to add the logging services we use in our system.

So the question is - Do you think this is a reasonable approach, or it is strictly advised not to take dependency on these members?