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Merge pull request red-hat-storage#2374 from umangachapagain/refactor…
…-platform-detection Refactor platform detection
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,162 @@ | ||
| package platform | ||
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||
| import ( | ||
| "context" | ||
| "errors" | ||
| "log" | ||
| "sync" | ||
|
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||
| configv1 "github.com/openshift/api/config/v1" | ||
| secv1 "github.com/openshift/api/security/v1" | ||
| configv1Client "github.com/openshift/client-go/config/clientset/versioned/typed/config/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/client-go/discovery" | ||
| "k8s.io/client-go/rest" | ||
| ctrl "sigs.k8s.io/controller-runtime" | ||
| ) | ||
|
|
||
| var ( | ||
| once sync.Once | ||
| platformInstance *platform | ||
|
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| ErrorPlatformNotDetected = errors.New("platform not detected") | ||
|
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| // SkipObjectStorePlatforms is a list of all PlatformTypes where CephObjectStores will not be deployed. | ||
| SkipObjectStorePlatforms = []configv1.PlatformType{ | ||
| configv1.AWSPlatformType, | ||
| configv1.GCPPlatformType, | ||
| configv1.AzurePlatformType, | ||
| configv1.IBMCloudPlatformType, | ||
| } | ||
| ) | ||
|
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| // platform is used to get the PlatformType of the running cluster in a thread-safe manner | ||
| // It is a singleton which is initialized exactly once via Detect() function call. | ||
| type platform struct { | ||
| isOpenShift bool | ||
| platform configv1.PlatformType | ||
| } | ||
|
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| // SetFakePlatformInstanceForTesting can be used to fake a Platform while testing. | ||
| // It should only be used for testing. This is not thread-safe. | ||
| func SetFakePlatformInstanceForTesting(isOpenShift bool, platformType configv1.PlatformType) { | ||
| platformInstance = &platform{ | ||
| isOpenShift: isOpenShift, | ||
| platform: platformType, | ||
| } | ||
| } | ||
|
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| // UnsetFakePlatformInstanceForTesting can be used to unset the fake Platform while testing. | ||
| // It should only be used for testing. This is not thread-safe. | ||
| func UnsetFakePlatformInstanceForTesting() { | ||
| platformInstance = &platform{} | ||
| } | ||
|
|
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| // Detect instantiates the platform only once. It is thread-safe. | ||
| func Detect() { | ||
| if platformInstance != nil { | ||
| return | ||
| } | ||
| once.Do(func() { | ||
| platformInstance = &platform{} | ||
| cfg := ctrl.GetConfigOrDie() | ||
| dclient := discovery.NewDiscoveryClientForConfigOrDie(cfg) | ||
| _, apis, err := dclient.ServerGroupsAndResources() | ||
| if err != nil && !discovery.IsGroupDiscoveryFailedError(err) { | ||
| log.Fatal(err) | ||
| } | ||
|
|
||
| if discovery.IsGroupDiscoveryFailedError(err) { | ||
| e := err.(*discovery.ErrGroupDiscoveryFailed) | ||
| if _, exists := e.Groups[secv1.GroupVersion]; exists { | ||
| platformInstance.isOpenShift = true | ||
| } | ||
| } | ||
|
|
||
| if !platformInstance.isOpenShift { | ||
| for _, api := range apis { | ||
| if api.GroupVersion == secv1.GroupVersion.String() { | ||
| for _, resource := range api.APIResources { | ||
| if resource.Name == "securitycontextconstraints" { | ||
| platformInstance.isOpenShift = true | ||
| break | ||
| } | ||
| } | ||
| } | ||
| if platformInstance.isOpenShift { | ||
| break | ||
| } | ||
| } | ||
| } | ||
|
|
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| if platformInstance.isOpenShift { | ||
| if infrastructure, err := configv1client(cfg).Infrastructures().Get(context.TODO(), "cluster", metav1.GetOptions{}); err != nil { | ||
| platformInstance.platform = infrastructure.Status.PlatformStatus.Type | ||
| } | ||
| } | ||
| }) | ||
| } | ||
|
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| func configv1client(cfg *rest.Config) *configv1Client.ConfigV1Client { | ||
| return configv1Client.NewForConfigOrDie(cfg) | ||
| } | ||
|
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| // IsPlatformOpenShift returns true if platform is detected to be OpenShift. | ||
| // It returns false in all other cases, including when platform is not yet detected. | ||
| func IsPlatformOpenShift() (bool, error) { | ||
| if platformInstance == nil { | ||
| return false, ErrorPlatformNotDetected | ||
| } | ||
| return platformInstance.isOpenShift, nil | ||
| } | ||
|
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| // GetPlatformType is used to get the PlatformType of the running cluster. | ||
| // It returns a PlatformType only when running on OpenShift clusters. | ||
| // If it is not running on OpenShift or platform is not yet detected, it return empty PlatformType. | ||
| func GetPlatformType() (configv1.PlatformType, error) { | ||
| if platformInstance == nil { | ||
| return "", ErrorPlatformNotDetected | ||
| } | ||
| return platformInstance.platform, nil | ||
| } | ||
|
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| // DevicesDefaultToFastForThisPlatform determines whether we should TuneFastDeviceClass for this platform. | ||
| // It returns false if we shouldn't TuneFastDeviceClass or if platform is not yet detected. | ||
| func DevicesDefaultToFastForThisPlatform() (bool, error) { | ||
| // tuneFastPlatforms is a list of all PlatformTypes where TuneFastDeviceClass has to be set True. | ||
| var tuneFastPlatforms = []configv1.PlatformType{ | ||
| configv1.OvirtPlatformType, | ||
| configv1.IBMCloudPlatformType, | ||
| configv1.AzurePlatformType, | ||
| } | ||
| platform, err := GetPlatformType() | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| for _, tfplatform := range tuneFastPlatforms { | ||
| if platform == tfplatform { | ||
| return true, nil | ||
| } | ||
| } | ||
|
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| return false, nil | ||
| } | ||
|
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| // PlatformsShouldSkipObjectStore determines whether an object store should be created | ||
| // for the platform. It returns false if ObjectStore should not be skipped or if platform is not yet detected. | ||
| func PlatformsShouldSkipObjectStore() (bool, error) { | ||
| platform, err := GetPlatformType() | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| return SkipObjectStore(platform), nil | ||
| } | ||
|
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| func SkipObjectStore(p configv1.PlatformType) bool { | ||
| for _, platform := range SkipObjectStorePlatforms { | ||
| if p == platform { | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } |
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