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deployment.go
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deployment.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package general
import (
"context"
"fmt"
"github.com/go-logr/logr"
appsv1 "k8s.io/api/apps/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/log"
"github.com/gardener/gardener/extensions/pkg/controller/healthcheck"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
"github.com/gardener/gardener/pkg/utils/kubernetes/health"
)
// DeploymentHealthChecker contains all the information for the Deployment HealthCheck
type DeploymentHealthChecker struct {
logger logr.Logger
seedClient client.Client
shootClient client.Client
name string
checkType DeploymentCheckType
}
// DeploymentCheckType in which cluster the check will be executed
type DeploymentCheckType string
const (
deploymentCheckTypeSeed DeploymentCheckType = "Seed"
deploymentCheckTypeShoot DeploymentCheckType = "Shoot"
)
// NewSeedDeploymentHealthChecker is a healthCheck function to check Deployments in the Seed cluster
func NewSeedDeploymentHealthChecker(deploymentName string) healthcheck.HealthCheck {
return &DeploymentHealthChecker{
name: deploymentName,
checkType: deploymentCheckTypeSeed,
}
}
// NewShootDeploymentHealthChecker is a healthCheck function to check Deployments in the Shoot cluster
func NewShootDeploymentHealthChecker(deploymentName string) healthcheck.HealthCheck {
return &DeploymentHealthChecker{
name: deploymentName,
checkType: deploymentCheckTypeShoot,
}
}
// InjectSeedClient injects the seed client
func (healthChecker *DeploymentHealthChecker) InjectSeedClient(seedClient client.Client) {
healthChecker.seedClient = seedClient
}
// InjectShootClient injects the shoot client
func (healthChecker *DeploymentHealthChecker) InjectShootClient(shootClient client.Client) {
healthChecker.shootClient = shootClient
}
// SetLoggerSuffix injects the logger
func (healthChecker *DeploymentHealthChecker) SetLoggerSuffix(provider, extension string) {
healthChecker.logger = log.Log.WithName(fmt.Sprintf("%s-%s-healthcheck-deployment", provider, extension))
}
// DeepCopy clones the healthCheck struct by making a copy and returning the pointer to that new copy
// Actually, it does not perform a *deep* copy.
func (healthChecker *DeploymentHealthChecker) DeepCopy() healthcheck.HealthCheck {
shallowCopy := *healthChecker
return &shallowCopy
}
// Check executes the health check
func (healthChecker *DeploymentHealthChecker) Check(ctx context.Context, request types.NamespacedName) (*healthcheck.SingleCheckResult, error) {
deployment := &appsv1.Deployment{}
var err error
if healthChecker.checkType == deploymentCheckTypeSeed {
err = healthChecker.seedClient.Get(ctx, client.ObjectKey{Namespace: request.Namespace, Name: healthChecker.name}, deployment)
} else {
err = healthChecker.shootClient.Get(ctx, client.ObjectKey{Namespace: request.Namespace, Name: healthChecker.name}, deployment)
}
if err != nil {
if apierrors.IsNotFound(err) {
return &healthcheck.SingleCheckResult{
Status: gardencorev1beta1.ConditionFalse,
Detail: fmt.Sprintf("deployment %q in namespace %q not found", healthChecker.name, request.Namespace),
}, nil
}
err := fmt.Errorf("failed to retrieve deployment %q in namespace %q: %w", healthChecker.name, request.Namespace, err)
healthChecker.logger.Error(err, "Health check failed")
return nil, err
}
if isHealthy, err := deploymentIsHealthy(deployment); !isHealthy {
healthChecker.logger.Error(err, "Health check failed")
return &healthcheck.SingleCheckResult{
Status: gardencorev1beta1.ConditionFalse,
Detail: err.Error(),
}, nil
}
return &healthcheck.SingleCheckResult{
Status: gardencorev1beta1.ConditionTrue,
}, nil
}
func deploymentIsHealthy(deployment *appsv1.Deployment) (bool, error) {
if err := health.CheckDeployment(deployment); err != nil {
err := fmt.Errorf("deployment %q in namespace %q is unhealthy: %w", deployment.Name, deployment.Namespace, err)
return false, err
}
return true, nil
}