add /livez as a liveness endpoint for kube-apiserver

go fmt

make func private

refactor config_test

Two primary refactorings:

1. config test checkPath method is now each a distinct test
run (which makes it easier to see what is actually failing)

2. TestNewWithDelegate's root path check now parses the json output and
does a comparison against a list of expected paths (no more whitespace
and ordering issues when updating this test, yay).

go fmt

modify and simplify existing integration test for readyz/livez

simplify integration test

set default rbac policy rules for livez

rename a few functions and the entrypoint command line argument (and etcetera)

simplify interface for installing readyz and livez and make auto-register completion a bootstrapped check

untangle some of the nested functions, restructure the code

cmd/kube-apiserver/app/testing/testserver.go

@@ -31,7 +31,6 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/util/wait"
 	"k8s.io/apiserver/pkg/registry/generic/registry"
-	"k8s.io/apiserver/pkg/server/healthz"
 	"k8s.io/apiserver/pkg/storage/storagebackend"
 	"k8s.io/client-go/kubernetes"
 	restclient "k8s.io/client-go/rest"
@@ -46,8 +45,6 @@ type TearDownFunc func()
 type TestServerInstanceOptions struct {
 	// DisableStorageCleanup Disable the automatic storage cleanup
 	DisableStorageCleanup bool
-	// Injected health
-	InjectedHealthChecker healthz.HealthChecker
 }
 
 // TestServer return values supplied by kube-test-ApiServer
@@ -151,13 +148,6 @@ func StartTestServer(t Logger, instanceOptions *TestServerInstanceOptions, custo
 		return result, fmt.Errorf("failed to create server chain: %v", err)
 	}
 
-	if instanceOptions.InjectedHealthChecker != nil {
-		t.Logf("Adding health check with delay %v %v", s.GenericServerRunOptions.MaxStartupSequenceDuration, instanceOptions.InjectedHealthChecker.Name())
-		if err := server.GenericAPIServer.AddDelayedHealthzChecks(s.GenericServerRunOptions.MaxStartupSequenceDuration, instanceOptions.InjectedHealthChecker); err != nil {
-			return result, err
-		}
-	}
-
 	errCh := make(chan error)
 	go func(stopCh <-chan struct{}) {
 		prepared, err := server.PrepareRun()