More stringent linting rules (and update linter)

I noticed that the linter was allowing through some commenting rules that
weren't very good, so removed the option that was allowing that to happen
`exclude-use-default`, and then also updated the linter while I was in here
to the latest version.

.golangci.yml

@@ -31,7 +31,6 @@ run:
   # autogenerated files. If it's not please let us know.
   skip-files:
 
-
 # output configuration options
 output:
   # colored-line-number|line-number|json|tab|checkstyle, default is "colored-line-number"
@@ -43,7 +42,6 @@ output:
   # print linter name in the end of issue text, default is true
   print-linter-name: true
 
-
 linters:
   enable:
     - megacheck
@@ -61,3 +59,7 @@ linters:
     - unparam
     - nakedret
 
+issues:
+  # This turns off the default excludes - which was causing the linter
+  # to miss things like erroneous comments
+  exclude-use-default: false

build/build-image/Dockerfile

@@ -69,7 +69,7 @@ RUN go get -u github.com/golang/dep/cmd/dep && \
     go get -u golang.org/x/tools/cmd/goimports
 
 # install golang-ci linter
-RUN curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $GOPATH/bin v1.10.2
+RUN curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $GOPATH/bin v1.12.2
 
 # install the release branch of the code generator tools
 RUN mkdir -p /go/src && cd /go/src && mkdir -p k8s.io && cd k8s.io && \

pkg/apis/stable/v1alpha1/fleet.go

@@ -27,13 +27,11 @@ const (
 	FleetGameServerSetLabel = stable.GroupName + "/fleet"
 )
 
-type SchedulingStrategy string
-
 // +genclient
 // +genclient:noStatus
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
-// Fleet is the data structure for a gameserver resource
+// Fleet is the data structure for a Fleet resource
 type Fleet struct {
 	metav1.TypeMeta   `json:",inline"`
 	metav1.ObjectMeta `json:"metadata,omitempty"`
@@ -44,7 +42,7 @@ type Fleet struct {
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
-// FleetList is a list of GameServer resources
+// FleetList is a list of Fleet resources
 type FleetList struct {
 	metav1.TypeMeta `json:",inline"`
 	metav1.ListMeta `json:"metadata,omitempty"`
@@ -64,7 +62,7 @@ type FleetSpec struct {
 	Template GameServerTemplateSpec `json:"template"`
 }
 
-// FleetStatus is the status of a GameServerSet
+// FleetStatus is the status of a Fleet
 type FleetStatus struct {
 	// Replicas the total number of current GameServer replicas
 	Replicas int32 `json:"replicas"`

pkg/apis/stable/v1alpha1/fleetautoscaler.go

@@ -58,10 +58,13 @@ type FleetAutoscalerPolicy struct {
 	Buffer *BufferPolicy `json:"buffer,omitempty"`
 }
 
+// FleetAutoscalerPolicyType is the policy for autoscaling
+// for a given Fleet
 type FleetAutoscalerPolicyType string
 
 const (
-	// Kill all existing pods before creating new ones.
+	// BufferPolicyType FleetAutoscalerPolicyType is a simple buffering strategy for Ready
+	// GameServers
 	BufferPolicyType FleetAutoscalerPolicyType = "Buffer"
 )
 
@@ -124,15 +127,15 @@ func (fas *FleetAutoscaler) ValidateUpdate(new *FleetAutoscaler, causes []metav1
 	return new.ValidateAutoScalingSettings(causes)
 }
 
-//ValidateAutoScalingSettings validates the FleetAutoscaler scaling settings
+// ValidateAutoScalingSettings validates the FleetAutoscaler scaling settings
 func (fas *FleetAutoscaler) ValidateAutoScalingSettings(causes []metav1.StatusCause) []metav1.StatusCause {
 	if fas.Spec.Policy.Type == BufferPolicyType {
 		causes = fas.Spec.Policy.Buffer.ValidateAutoScalingBufferPolicy(causes)
 	}
 	return causes
 }
 
-//ValidateAutoScalingSettings validates the FleetAutoscaler Buffer policy settings
+// ValidateAutoScalingBufferPolicy validates the FleetAutoscaler Buffer policy settings
 func (b *BufferPolicy) ValidateAutoScalingBufferPolicy(causes []metav1.StatusCause) []metav1.StatusCause {
 	if b == nil {
 		return append(causes, metav1.StatusCause{

pkg/apis/stable/v1alpha1/scheduling.go

@@ -29,3 +29,7 @@ const (
 	// In future versions, this will also impact Fleet scale down, and Pod Scheduling.
 	Distributed SchedulingStrategy = "Distributed"
 )
+
+// SchedulingStrategy is the strategy that a Fleet & GameServers will use
+// when scheduling GameServers' Pods across a cluster.
+type SchedulingStrategy string

pkg/gameservers/localsdk.go

@@ -223,7 +223,7 @@ func (l *LocalSDKServer) setGameServerFromFilePath(filePath string) error {
 	logrus.WithField("filePath", filePath).Info("Reading GameServer configuration")
 
 	reader, err := os.Open(filePath) // nolint: gosec
-	defer reader.Close()             // nolint: megacheck
+	defer reader.Close()             // nolint: megacheck,errcheck
 
 	if err != nil {
 		return err

test/e2e/framework/framework.go

@@ -152,7 +152,7 @@ func (f *Framework) ListGameServersFromFleet(flt *v1alpha1.Fleet) ([]v1alpha1.Ga
 	return results, nil
 }
 
-// FleetReadyCountCondition checks the ready count in a fleet
+// FleetReadyCount returns the ready count in a fleet
 func FleetReadyCount(amount int32) func(fleet *v1alpha1.Fleet) bool {
 	return func(fleet *v1alpha1.Fleet) bool {
 		return fleet.Status.ReadyReplicas == amount