Upgrade problem (v0.15.2->v0.17.3): configuring namespace

[Svintooo]

I inherited an unfamiliar code-base that broke when controller-runtime was upgraded from v0.15.2 to v0.17.3.
I think I fixed it, but I am asking for a second opinion. How I set the namespace seems unnecessary complicated.

Questions

1. Should the below fix preserve the old functionality correctly?
2. Is this the intended way to set the namespace and metrics bind address?

Code fix

The code that broke looked something like this:

import (
  "k8s.io/apimachinery/pkg/runtime"
  ctrl "sigs.k8s.io/controller-runtime"
)

func managerOptions(scheme *runtime.Scheme, namespace string) ctrl.Options {
  return ctrl.Options{
    Scheme:                     scheme,
    Namespace:                  namespace, // unknown field Namespace in struct literal of type manager.Options
    LeaderElection:             true,
    LeaderElectionResourceLock: "leases",
    LeaderElectionID:           "a-string-of-some-kind",
    MetricsBindAddress:         "0" // unknown field MetricsBindAddress in struct literal of type manager.Options
  }
}

My fix:

import (
  "k8s.io/apimachinery/pkg/runtime"
  ctrl "sigs.k8s.io/controller-runtime"
  "sigs.k8s.io/controller-runtime/pkg/cache" // NEW
  metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server" // NEW
)

func managerOptions(scheme *runtime.Scheme, namespace string) ctrl.Options {
  return ctrl.Options{
    Scheme: scheme,
    Cache: cache.Options{ // NEW
      DefaultNamespaces: map[string]cache.Config{ // NEW
        namespace: {}, // NEW
      }, // NEW
    }, // NEW
    LeaderElection:             true,
    LeaderElectionResourceLock: "leases",
    LeaderElectionID:           "a-string-of-some-kind",
    Metrics:                    metricsserver.Options{BindAddress: "0"}, // NEW
  }
}

Extra

Nameserver fix was inspired by the following change in pkg/manager/example_test.go between v0.15.2 and v0.17.3:

controller-runtime/pkg/manager/example_test.go

Line 64 in 36bb899

 opts.Namespaces = []string{"namespace1", "namespace2"} 

controller-runtime/pkg/manager/example_test.go

Lines 64 to 67 in c25fe2f

 opts.DefaultNamespaces = map[string]cache.Config{ 
 	"namespace1": {}, 
 	"namespace2": {}, 
 } 

Namespace was removed in favor of Cache: Cache.Options.Namespaces in v0.16.0 in commit e92eadb.
Cache.Options.Namespaces was changed to Cache.Options.DefaultNamespaces in v0.16.0 in commit 3e35cab.
MetricsBindAddress was changed to Metrics: metricsserver.Options.BindAddress in v0.16.0 in commit e59161e.

[Stefan Büringer]

Yup, that's correct.

[Svintooo]

Thank you. Now I can be more relaxed.