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snow.go
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snow.go
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package snow
import (
"context"
"fmt"
"time"
"github.com/go-logr/logr"
"k8s.io/apimachinery/pkg/api/equality"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/aws/eks-anywhere/pkg/api/v1alpha1"
"github.com/aws/eks-anywhere/pkg/bootstrapper"
"github.com/aws/eks-anywhere/pkg/clients/kubernetes"
"github.com/aws/eks-anywhere/pkg/cluster"
"github.com/aws/eks-anywhere/pkg/constants"
"github.com/aws/eks-anywhere/pkg/logger"
"github.com/aws/eks-anywhere/pkg/providers"
providerValidator "github.com/aws/eks-anywhere/pkg/providers/validator"
"github.com/aws/eks-anywhere/pkg/retrier"
"github.com/aws/eks-anywhere/pkg/templater"
"github.com/aws/eks-anywhere/pkg/types"
releasev1alpha1 "github.com/aws/eks-anywhere/release/api/v1alpha1"
)
const (
eksaSnowCredentialsFileKey = "EKSA_AWS_CREDENTIALS_FILE"
eksaSnowCABundlesFileKey = "EKSA_AWS_CA_BUNDLES_FILE"
snowCredentialsKey = "AWS_B64ENCODED_CREDENTIALS"
snowCertsKey = "AWS_B64ENCODED_CA_BUNDLES"
maxRetries = 30
backOffPeriod = 5 * time.Second
)
var (
snowDatacenterResourceType = fmt.Sprintf("snowdatacenterconfigs.%s", v1alpha1.GroupVersion.Group)
snowMachineResourceType = fmt.Sprintf("snowmachineconfigs.%s", v1alpha1.GroupVersion.Group)
)
type SnowProvider struct {
kubeUnAuthClient KubeUnAuthClient
retrier *retrier.Retrier
configManager *ConfigManager
ipValidator *providerValidator.IPValidator
skipIpCheck bool
log logr.Logger
}
type KubeUnAuthClient interface {
KubeconfigClient(kubeconfig string) kubernetes.Client
Apply(ctx context.Context, kubeconfig string, obj runtime.Object) error
}
func NewProvider(kubeUnAuthClient KubeUnAuthClient, configManager *ConfigManager, skipIpCheck bool) *SnowProvider {
retrier := retrier.NewWithMaxRetries(maxRetries, backOffPeriod)
return &SnowProvider{
kubeUnAuthClient: kubeUnAuthClient,
retrier: retrier,
configManager: configManager,
ipValidator: providerValidator.NewIPValidator(),
skipIpCheck: skipIpCheck,
log: logger.Get(),
}
}
func (p *SnowProvider) Name() string {
return constants.SnowProviderName
}
func (p *SnowProvider) SetupAndValidateCreateCluster(ctx context.Context, clusterSpec *cluster.Spec) error {
if err := p.validateUpgradeRolloutStrategy(clusterSpec); err != nil {
return fmt.Errorf("failed setup and validations: %v", err)
}
if err := p.configManager.SetDefaultsAndValidate(ctx, clusterSpec.Config); err != nil {
return fmt.Errorf("setting defaults and validate snow config: %v", err)
}
if !p.skipIpCheck {
if err := p.ipValidator.ValidateControlPlaneIPUniqueness(clusterSpec.Cluster); err != nil {
return err
}
} else {
logger.Info("Skipping check for whether control plane ip is in use")
}
return nil
}
func (p *SnowProvider) SetupAndValidateUpgradeCluster(ctx context.Context, cluster *types.Cluster, clusterSpec *cluster.Spec, _ *cluster.Spec) error {
if err := p.validateUpgradeRolloutStrategy(clusterSpec); err != nil {
return fmt.Errorf("failed setup and validations: %v", err)
}
if err := p.configManager.SetDefaultsAndValidate(ctx, clusterSpec.Config); err != nil {
return fmt.Errorf("setting defaults and validate snow config: %v", err)
}
return nil
}
func (p *SnowProvider) SetupAndValidateDeleteCluster(ctx context.Context, _ *types.Cluster, clusterSpec *cluster.Spec) error {
if err := p.validateUpgradeRolloutStrategy(clusterSpec); err != nil {
return fmt.Errorf("failed setup and validations: %v", err)
}
if err := SetupEksaCredentialsSecret(clusterSpec.Config); err != nil {
return fmt.Errorf("setting up credentials: %v", err)
}
return nil
}
func (p *SnowProvider) UpdateSecrets(ctx context.Context, cluster *types.Cluster, clusterSpec *cluster.Spec) error {
if err := p.kubeUnAuthClient.Apply(ctx, cluster.KubeconfigFile, clusterSpec.SnowCredentialsSecret); err != nil {
return fmt.Errorf("applying eks-a snow credentials secret in cluster: %v", err)
}
return nil
}
// CAPIObjects generates the control plane and worker nodes objects for snow provider from clusterSpec.
func CAPIObjects(ctx context.Context, log logr.Logger, clusterSpec *cluster.Spec, kubeClient kubernetes.Client) (controlPlaneSpec, workersSpec []byte, err error) {
controlPlaneObjs, err := ControlPlaneObjects(ctx, log, clusterSpec, kubeClient)
if err != nil {
return nil, nil, err
}
controlPlaneSpec, err = templater.ObjectsToYaml(kubernetesToRuntimeObjects(controlPlaneObjs)...)
if err != nil {
return nil, nil, err
}
workersObjs, err := WorkersObjects(ctx, log, clusterSpec, kubeClient)
if err != nil {
return nil, nil, err
}
workersSpec, err = templater.ObjectsToYaml(kubernetesToRuntimeObjects(workersObjs)...)
if err != nil {
return nil, nil, err
}
return controlPlaneSpec, workersSpec, nil
}
func kubernetesToRuntimeObjects(objs []kubernetes.Object) []runtime.Object {
runtimeObjs := make([]runtime.Object, 0, len(objs))
for _, o := range objs {
runtimeObjs = append(runtimeObjs, o)
}
return runtimeObjs
}
func (p *SnowProvider) generateCAPISpec(ctx context.Context, cluster *types.Cluster, clusterSpec *cluster.Spec) (controlPlaneSpec, workersSpec []byte, err error) {
kubeconfigClient := p.kubeUnAuthClient.KubeconfigClient(cluster.KubeconfigFile)
return CAPIObjects(ctx, p.log, clusterSpec, kubeconfigClient)
}
func (p *SnowProvider) GenerateCAPISpecForCreate(ctx context.Context, cluster *types.Cluster, clusterSpec *cluster.Spec) (controlPlaneSpec, workersSpec []byte, err error) {
return p.generateCAPISpec(ctx, cluster, clusterSpec)
}
func (p *SnowProvider) GenerateCAPISpecForUpgrade(ctx context.Context, bootstrapCluster, _ *types.Cluster, _ *cluster.Spec, clusterSpec *cluster.Spec) (controlPlaneSpec, workersSpec []byte, err error) {
return p.generateCAPISpec(ctx, bootstrapCluster, clusterSpec)
}
func (p *SnowProvider) PreCAPIInstallOnBootstrap(ctx context.Context, cluster *types.Cluster, clusterSpec *cluster.Spec) error {
return nil
}
func (p *SnowProvider) PostBootstrapSetup(ctx context.Context, clusterConfig *v1alpha1.Cluster, cluster *types.Cluster) error {
return nil
}
// PostBootstrapDeleteForUpgrade runs any provider-specific operations after bootstrap cluster has been deleted.
func (p *SnowProvider) PostBootstrapDeleteForUpgrade(ctx context.Context, cluster *types.Cluster) error {
return nil
}
func (p *SnowProvider) PostBootstrapSetupUpgrade(ctx context.Context, clusterConfig *v1alpha1.Cluster, cluster *types.Cluster) error {
return nil
}
func (p *SnowProvider) PostWorkloadInit(ctx context.Context, cluster *types.Cluster, clusterSpec *cluster.Spec) error {
return nil
}
func (p *SnowProvider) BootstrapClusterOpts(_ *cluster.Spec) ([]bootstrapper.BootstrapClusterOption, error) {
return nil, nil
}
func (p *SnowProvider) UpdateKubeConfig(content *[]byte, clusterName string) error {
return nil
}
func (p *SnowProvider) Version(clusterSpec *cluster.Spec) string {
versionsBundle := clusterSpec.RootVersionsBundle()
return versionsBundle.Snow.Version
}
func (p *SnowProvider) EnvMap(clusterSpec *cluster.Spec) (map[string]string, error) {
envMap := make(map[string]string)
envMap[snowCredentialsKey] = string(clusterSpec.SnowCredentialsSecret.Data[v1alpha1.SnowCredentialsKey])
envMap[snowCertsKey] = string(clusterSpec.SnowCredentialsSecret.Data[v1alpha1.SnowCertificatesKey])
versionsBundle := clusterSpec.RootVersionsBundle()
envMap["SNOW_CONTROLLER_IMAGE"] = versionsBundle.Snow.Manager.VersionedImage()
return envMap, nil
}
func (p *SnowProvider) GetDeployments() map[string][]string {
return map[string][]string{
constants.CapasSystemNamespace: {"capas-controller-manager"},
}
}
func (p *SnowProvider) GetInfrastructureBundle(clusterSpec *cluster.Spec) *types.InfrastructureBundle {
versionsBundle := clusterSpec.RootVersionsBundle()
folderName := fmt.Sprintf("infrastructure-snow/%s/", versionsBundle.Snow.Version)
infraBundle := types.InfrastructureBundle{
FolderName: folderName,
Manifests: []releasev1alpha1.Manifest{
versionsBundle.Snow.Components,
versionsBundle.Snow.Metadata,
},
}
return &infraBundle
}
func (p *SnowProvider) DatacenterConfig(clusterSpec *cluster.Spec) providers.DatacenterConfig {
return clusterSpec.SnowDatacenter
}
func (p *SnowProvider) DatacenterResourceType() string {
return snowDatacenterResourceType
}
func (p *SnowProvider) MachineResourceType() string {
return snowMachineResourceType
}
func (p *SnowProvider) MachineConfigs(clusterSpec *cluster.Spec) []providers.MachineConfig {
configs := make([]providers.MachineConfig, 0, len(clusterSpec.SnowMachineConfigs))
for _, mc := range clusterSpec.SnowMachineConfigs {
configs = append(configs, mc)
}
return configs
}
func (p *SnowProvider) ValidateNewSpec(ctx context.Context, cluster *types.Cluster, clusterSpec *cluster.Spec) error {
return nil
}
func (p *SnowProvider) ChangeDiff(currentSpec, newSpec *cluster.Spec) *types.ComponentChangeDiff {
currentVersionsBundle := currentSpec.RootVersionsBundle()
newVersionsBundle := newSpec.RootVersionsBundle()
if currentVersionsBundle.Snow.Version == newVersionsBundle.Snow.Version {
return nil
}
return &types.ComponentChangeDiff{
ComponentName: constants.SnowProviderName,
NewVersion: newVersionsBundle.Snow.Version,
OldVersion: currentVersionsBundle.Snow.Version,
}
}
func (p *SnowProvider) RunPostControlPlaneUpgrade(ctx context.Context, oldClusterSpec *cluster.Spec, clusterSpec *cluster.Spec, workloadCluster *types.Cluster, managementCluster *types.Cluster) error {
return nil
}
func bundleImagesEqual(new, old releasev1alpha1.SnowBundle) bool {
return new.Manager.ImageDigest == old.Manager.ImageDigest && new.KubeVip.ImageDigest == old.KubeVip.ImageDigest
}
func (p *SnowProvider) machineConfigsChanged(ctx context.Context, cluster *types.Cluster, spec *cluster.Spec) (bool, error) {
client := p.kubeUnAuthClient.KubeconfigClient(cluster.KubeconfigFile)
for _, new := range spec.SnowMachineConfigs {
old := &v1alpha1.SnowMachineConfig{}
err := client.Get(ctx, new.Name, namespaceOrDefault(new), old)
if apierrors.IsNotFound(err) {
return true, nil
}
if err != nil {
return false, err
}
if len(new.Spec.Devices) != len(old.Spec.Devices) || !equality.Semantic.DeepDerivative(new.Spec, old.Spec) {
return true, nil
}
}
return false, nil
}
func (p *SnowProvider) datacenterChanged(ctx context.Context, cluster *types.Cluster, spec *cluster.Spec) (bool, error) {
client := p.kubeUnAuthClient.KubeconfigClient(cluster.KubeconfigFile)
new := spec.SnowDatacenter
old := &v1alpha1.SnowDatacenterConfig{}
err := client.Get(ctx, new.Name, namespaceOrDefault(new), old)
if apierrors.IsNotFound(err) {
return true, nil
}
if err != nil {
return false, err
}
return !equality.Semantic.DeepDerivative(new.Spec, old.Spec), nil
}
// namespaceOrDefault return the object namespace or default if it's empty.
func namespaceOrDefault(obj client.Object) string {
ns := obj.GetNamespace()
if ns == "" {
ns = "default"
}
return ns
}
func (p *SnowProvider) validateUpgradeRolloutStrategy(clusterSpec *cluster.Spec) error {
if clusterSpec.Cluster.Spec.ControlPlaneConfiguration.UpgradeRolloutStrategy != nil {
return fmt.Errorf("Upgrade rollout strategy customization is not supported for snow provider")
}
for _, workerNodeGroupConfiguration := range clusterSpec.Cluster.Spec.WorkerNodeGroupConfigurations {
if workerNodeGroupConfiguration.UpgradeRolloutStrategy != nil {
return fmt.Errorf("Upgrade rollout strategy customization is not supported for snow provider")
}
}
return nil
}
// UpgradeNeeded compares the new snow version bundle and objects with the existing ones in the cluster and decides whether
// to trigger a cluster upgrade or not.
// TODO: revert the change once cluster.BuildSpec is used in cluster_manager to replace the deprecated cluster.BuildSpecForCluster
func (p *SnowProvider) UpgradeNeeded(ctx context.Context, newSpec, oldSpec *cluster.Spec, c *types.Cluster) (bool, error) {
oldVersionBundle := oldSpec.RootVersionsBundle()
newVersionsBundle := newSpec.RootVersionsBundle()
if !bundleImagesEqual(newVersionsBundle.Snow, oldVersionBundle.Snow) {
return true, nil
}
datacenterChanged, err := p.datacenterChanged(ctx, c, newSpec)
if err != nil {
return false, err
}
if datacenterChanged {
return true, nil
}
return p.machineConfigsChanged(ctx, c, newSpec)
}
func (p *SnowProvider) DeleteResources(ctx context.Context, clusterSpec *cluster.Spec) error {
client := p.kubeUnAuthClient.KubeconfigClient(clusterSpec.ManagementCluster.KubeconfigFile)
for _, mc := range clusterSpec.SnowMachineConfigs {
mc.Namespace = namespaceOrDefault(mc)
if err := client.Delete(ctx, mc); err != nil && !apierrors.IsNotFound(err) {
return err
}
}
clusterSpec.SnowDatacenter.Namespace = namespaceOrDefault(clusterSpec.SnowDatacenter)
if err := client.Delete(ctx, clusterSpec.SnowDatacenter); err != nil && !apierrors.IsNotFound(err) {
return fmt.Errorf("deleting snow datacenter: %v", err)
}
return nil
}
func (p *SnowProvider) PostClusterDeleteValidate(_ context.Context, _ *types.Cluster) error {
// No validations
return nil
}
func (p *SnowProvider) PostMoveManagementToBootstrap(_ context.Context, _ *types.Cluster) error {
// NOOP
return nil
}
func (p *SnowProvider) InstallCustomProviderComponents(ctx context.Context, kubeconfigFile string) error {
return nil
}
// PreCoreComponentsUpgrade staisfies the Provider interface.
func (p *SnowProvider) PreCoreComponentsUpgrade(
ctx context.Context,
cluster *types.Cluster,
clusterSpec *cluster.Spec,
) error {
return nil
}