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utils.go
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utils.go
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package runtime
import (
"context"
"github.com/go-logr/logr"
"github.com/kyverno/kyverno/pkg/config"
"github.com/kyverno/kyverno/pkg/tls"
appsv1 "k8s.io/api/apps/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
appsv1informers "k8s.io/client-go/informers/apps/v1"
appsv1listers "k8s.io/client-go/listers/apps/v1"
)
type Runtime interface {
IsDebug() bool
IsReady(ctx context.Context) bool
IsLive(ctx context.Context) bool
IsRollingUpdate() bool
IsGoingDown() bool
}
type runtime struct {
serverIP string
deploymentLister appsv1listers.DeploymentLister
certValidator tls.CertValidator
logger logr.Logger
}
func NewRuntime(
logger logr.Logger,
serverIP string,
deploymentInformer appsv1informers.DeploymentInformer,
certValidator tls.CertValidator,
) Runtime {
return &runtime{
logger: logger,
serverIP: serverIP,
deploymentLister: deploymentInformer.Lister(),
certValidator: certValidator,
}
}
func (c *runtime) IsDebug() bool {
return c.serverIP != ""
}
func (c *runtime) IsLive(context.Context) bool {
return true
}
func (c *runtime) IsReady(ctx context.Context) bool {
return c.validateCertificates(ctx)
}
func (c *runtime) IsRollingUpdate() bool {
if c.IsDebug() {
return false
}
deployment, err := c.getDeployment()
if err != nil {
c.logger.Error(err, "failed to get deployment")
return true
}
var replicas int32 = 1
if deployment.Spec.Replicas != nil {
replicas = *deployment.Spec.Replicas
}
nonTerminatedReplicas := deployment.Status.Replicas
if nonTerminatedReplicas > replicas {
c.logger.Info("detect Kyverno is in rolling update, won't trigger the update again")
return true
}
return false
}
func (c *runtime) IsGoingDown() bool {
if c.IsDebug() {
return false
}
deployment, err := c.getDeployment()
if err != nil {
return apierrors.IsNotFound(err)
}
if deployment.GetDeletionTimestamp() != nil {
return true
}
if deployment.Spec.Replicas != nil {
return *deployment.Spec.Replicas == 0
}
return false
}
func (c *runtime) getDeployment() (*appsv1.Deployment, error) {
return c.deploymentLister.Deployments(config.KyvernoNamespace()).Get(config.KyvernoDeploymentName())
}
func (c *runtime) validateCertificates(ctx context.Context) bool {
validity, err := c.certValidator.ValidateCert(ctx)
if err != nil {
c.logger.Error(err, "failed to validate certificates")
return false
}
return validity
}