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/
reconciler.go
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/
reconciler.go
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package machine
import (
"fmt"
"time"
"github.com/IBM-Cloud/power-go-client/power/models"
"github.com/openshift/cluster-api-provider-powervs/pkg/client"
machinecontroller "github.com/openshift/machine-api-operator/pkg/controller/machine"
"github.com/openshift/machine-api-operator/pkg/metrics"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/klog/v2"
)
const (
requeueAfterSeconds = 20
requeueAfterFatalSeconds = 180
masterLabel = "node-role.kubernetes.io/master"
)
// Reconciler runs the logic to reconciles a machine resource towards its desired state
type Reconciler struct {
*machineScope
}
func newReconciler(scope *machineScope) *Reconciler {
return &Reconciler{
machineScope: scope,
}
}
// create creates machine if it does not exists.
func (r *Reconciler) create() error {
klog.Infof("%s: creating machine", r.machine.Name)
if err := validateMachine(*r.machine); err != nil {
return fmt.Errorf("%v: failed validating machine provider spec: %w", r.machine.GetName(), err)
}
// TODO: remove 45 - 59, this logic is not needed anymore
// We explicitly do NOT want to remove stopped masters.
isMaster, err := r.isMaster()
if err != nil {
// Unable to determine if a machine is a master machine.
// Yet, it's only used to delete stopped machines that are not masters.
// So we can safely continue to create a new machine since in the worst case
// we just don't delete any stopped machine.
klog.Errorf("%s: Error determining if machine is master: %v", r.machine.Name, err)
} else {
if !isMaster {
// Prevent having a lot of stopped nodes sitting around.
if err = removeStoppedMachine(r.machine, r.powerVSClient); err != nil {
return fmt.Errorf("unable to remove stopped machines: %w", err)
}
}
}
userData, err := r.machineScope.getUserData()
if err != nil {
return fmt.Errorf("failed to get user data: %w", err)
}
instance, err := launchInstance(r.machine, r.providerSpec, userData, r.powerVSClient)
if err != nil {
klog.Errorf("%s: error creating machine: %v", r.machine.Name, err)
conditionFailed := conditionFailed()
conditionFailed.Message = err.Error()
r.machineScope.setProviderStatus(nil, conditionFailed)
return fmt.Errorf("failed to launch instance: %w", err)
}
klog.Infof("Created Machine %v", r.machine.Name)
if err = r.setProviderID(instance); err != nil {
return fmt.Errorf("failed to update machine object with providerID: %w", err)
}
if err = r.setMachineCloudProviderSpecifics(instance); err != nil {
return fmt.Errorf("failed to set machine cloud provider specifics: %w", err)
}
r.machineScope.setProviderStatus(instance, conditionSuccess())
return r.requeueIfInstanceBuilding(instance)
}
// delete deletes machine
func (r *Reconciler) delete() error {
klog.Infof("%s: deleting machine", r.machine.Name)
existingInstance, err := r.getMachineInstance()
if err != nil && err != client.ErrorInstanceNotFound {
metrics.RegisterFailedInstanceDelete(&metrics.MachineLabels{
Name: r.machine.Name,
Namespace: r.machine.Namespace,
Reason: err.Error(),
})
klog.Errorf("%s: error getting existing instances: %v", r.machine.Name, err)
return err
} else if err == client.ErrorInstanceNotFound {
klog.Warningf("%s: no instances found to delete for machine", r.machine.Name)
return nil
}
err = r.powerVSClient.DeleteInstance(*existingInstance.PvmInstanceID)
if err != nil {
metrics.RegisterFailedInstanceDelete(&metrics.MachineLabels{
Name: r.machine.Name,
Namespace: r.machine.Namespace,
Reason: err.Error(),
})
return fmt.Errorf("failed to delete instaces: %w", err)
}
klog.Infof("Deleted machine %v", r.machine.Name)
return nil
}
// update finds a vm and reconciles the machine resource status against it.
func (r *Reconciler) update() error {
klog.Infof("%s: updating machine", r.machine.Name)
if err := validateMachine(*r.machine); err != nil {
return fmt.Errorf("%v: failed validating machine provider spec: %v", r.machine.GetName(), err)
}
existingInstance, err := r.getMachineInstance()
if err != nil {
metrics.RegisterFailedInstanceUpdate(&metrics.MachineLabels{
Name: r.machine.Name,
Namespace: r.machine.Namespace,
Reason: err.Error(),
})
klog.Errorf("%s: error getting existing instance: %v", r.machine.Name, err)
return err
}
if err = r.setProviderID(existingInstance); err != nil {
return fmt.Errorf("failed to update machine object with providerID: %w", err)
}
if err = r.setMachineCloudProviderSpecifics(existingInstance); err != nil {
return fmt.Errorf("failed to set machine cloud provider specifics: %w", err)
}
klog.Infof("Updated machine %s", r.machine.Name)
r.machineScope.setProviderStatus(existingInstance, conditionSuccess())
return r.requeueIfInstanceBuilding(existingInstance)
}
// exists returns true if machine exists.
func (r *Reconciler) exists() (bool, error) {
existingInstance, err := r.getMachineInstance()
if err != nil && err != client.ErrorInstanceNotFound {
// Reporting as update here, as successfull return value from the method
// later indicases that an instance update flow will be executed.
metrics.RegisterFailedInstanceUpdate(&metrics.MachineLabels{
Name: r.machine.Name,
Namespace: r.machine.Namespace,
Reason: err.Error(),
})
klog.Errorf("%s: error getting existing instances: %v", r.machine.Name, err)
return false, err
}
if existingInstance == nil {
if r.machine.Spec.ProviderID != nil && *r.machine.Spec.ProviderID != "" && (r.machine.Status.LastUpdated == nil || r.machine.Status.LastUpdated.Add(requeueAfterSeconds*time.Second).After(time.Now())) {
klog.Infof("%s: Possible eventual-consistency discrepancy; returning an error to requeue", r.machine.Name)
return false, &machinecontroller.RequeueAfterError{RequeueAfter: requeueAfterSeconds * time.Second}
}
klog.Infof("%s: Instance does not exist", r.machine.Name)
return false, nil
}
return true, nil
}
// isMaster returns true if the machine is part of a cluster's control plane
func (r *Reconciler) isMaster() (bool, error) {
if r.machine.Status.NodeRef == nil {
klog.Errorf("NodeRef not found in machine %s", r.machine.Name)
return false, nil
}
node := &corev1.Node{}
nodeKey := types.NamespacedName{
Namespace: r.machine.Status.NodeRef.Namespace,
Name: r.machine.Status.NodeRef.Name,
}
err := r.client.Get(r.Context, nodeKey, node)
if err != nil {
return false, fmt.Errorf("failed to get node from machine %s", r.machine.Name)
}
if _, exists := node.Labels[masterLabel]; exists {
return true, nil
}
return false, nil
}
// setProviderID adds providerID in the machine spec
func (r *Reconciler) setProviderID(instance *models.PVMInstance) error {
existingProviderID := r.machine.Spec.ProviderID
if instance == nil {
return nil
}
//TODO: need to figure out a proper providerID here!
providerID := client.FormatProviderID(*instance.PvmInstanceID)
if existingProviderID != nil && *existingProviderID == providerID {
klog.Infof("%s: ProviderID already set in the machine Spec with value:%s", r.machine.Name, *existingProviderID)
return nil
}
r.machine.Spec.ProviderID = &providerID
klog.Infof("%s: ProviderID set at machine spec: %s", r.machine.Name, providerID)
return nil
}
func (r *Reconciler) setMachineCloudProviderSpecifics(instance *models.PVMInstance) error {
if instance == nil {
return nil
}
if r.machine.Labels == nil {
r.machine.Labels = make(map[string]string)
}
if r.machine.Spec.Labels == nil {
r.machine.Spec.Labels = make(map[string]string)
}
if r.machine.Annotations == nil {
r.machine.Annotations = make(map[string]string)
}
if instance.Status != nil {
r.machine.Annotations[machinecontroller.MachineInstanceStateAnnotationName] = *instance.Status
}
return nil
}
func (r *Reconciler) requeueIfInstanceBuilding(instance *models.PVMInstance) error {
// If machine state is still pending, we will return an error to keep the controllers
// attempting to update status until it hits a more permanent state. This will ensure
// we get a public IP populated more quickly.
if instance.Status != nil && *instance.Status == client.InstanceStateNameBuild {
klog.Infof("%s: Instance state still building, returning an error to requeue", r.machine.Name)
return &machinecontroller.RequeueAfterError{RequeueAfter: requeueAfterSeconds * time.Second}
}
return nil
}
func (r *Reconciler) getMachineInstance() (*models.PVMInstance, error) {
// If there is a non-empty instance ID, search using that, otherwise
// fallback to filtering based on name
if r.providerStatus.InstanceID != nil && *r.providerStatus.InstanceID != "" {
i, err := r.powerVSClient.GetInstance(*r.providerStatus.InstanceID)
if err != nil {
klog.Warningf("%s: Failed to find existing instance by id %s: %v", r.machine.Name, *r.providerStatus.InstanceID, err)
} else {
klog.Infof("%s: Found instance by id: %s", r.machine.Name, *r.providerStatus.InstanceID)
return i, nil
}
}
return r.powerVSClient.GetInstanceByName(r.machine.Name)
}