redis-standalone.go

package k8sutils

import redisv1beta2 "github.com/cafe24-dhkim05/redis-operator/api/v1beta2"

var (
	enableMetrics bool
)

// CreateStandaloneService method will create standalone service for Redis
func CreateStandaloneService(cr *redisv1beta2.Redis) error {
	logger := serviceLogger(cr.Namespace, cr.ObjectMeta.Name)
	labels := getRedisLabels(cr.ObjectMeta.Name, "standalone", "standalone", cr.ObjectMeta.Labels)
	annotations := generateServiceAnots(cr.ObjectMeta, nil)
	if cr.Spec.RedisExporter != nil && cr.Spec.RedisExporter.Enabled {
		enableMetrics = true
	} else {
		enableMetrics = false
	}
	additionalServiceAnnotations := map[string]string{}
	if cr.Spec.KubernetesConfig.Service != nil {
		additionalServiceAnnotations = cr.Spec.KubernetesConfig.Service.ServiceAnnotations
	}
	objectMetaInfo := generateObjectMetaInformation(cr.ObjectMeta.Name, cr.Namespace, labels, annotations)
	headlessObjectMetaInfo := generateObjectMetaInformation(cr.ObjectMeta.Name+"-headless", cr.Namespace, labels, annotations)
	additionalObjectMetaInfo := generateObjectMetaInformation(cr.ObjectMeta.Name+"-additional", cr.Namespace, labels, generateServiceAnots(cr.ObjectMeta, additionalServiceAnnotations))
	err := CreateOrUpdateService(cr.Namespace, headlessObjectMetaInfo, redisAsOwner(cr), false, true, "ClusterIP")
	if err != nil {
		logger.Error(err, "Cannot create standalone headless service for Redis")
		return err
	}
	err = CreateOrUpdateService(cr.Namespace, objectMetaInfo, redisAsOwner(cr), enableMetrics, false, "ClusterIP")
	if err != nil {
		logger.Error(err, "Cannot create standalone service for Redis")
		return err
	}
	additionalServiceType := "ClusterIP"
	if cr.Spec.KubernetesConfig.Service != nil {
		additionalServiceType = cr.Spec.KubernetesConfig.Service.ServiceType
	}
	err = CreateOrUpdateService(cr.Namespace, additionalObjectMetaInfo, redisAsOwner(cr), false, false, additionalServiceType)
	if err != nil {
		logger.Error(err, "Cannot create additional service for Redis")
		return err
	}
	return nil
}

// CreateStandaloneRedis will create a standalone redis setup
func CreateStandaloneRedis(cr *redisv1beta2.Redis) error {
	logger := statefulSetLogger(cr.Namespace, cr.ObjectMeta.Name)
	labels := getRedisLabels(cr.ObjectMeta.Name, "standalone", "standalone", cr.ObjectMeta.Labels)
	annotations := generateStatefulSetsAnots(cr.ObjectMeta)
	objectMetaInfo := generateObjectMetaInformation(cr.ObjectMeta.Name, cr.Namespace, labels, annotations)
	err := CreateOrUpdateStateFul(cr.Namespace,
		objectMetaInfo,
		generateRedisStandaloneParams(cr),
		redisAsOwner(cr),
		generateRedisStandaloneInitContainerParams(cr),
		generateRedisStandaloneContainerParams(cr),
		cr.Spec.Sidecars,
	)
	if err != nil {
		logger.Error(err, "Cannot create standalone statefulset for Redis")
		return err
	}
	return nil
}

// generateRedisStandalone generates Redis standalone information
func generateRedisStandaloneParams(cr *redisv1beta2.Redis) statefulSetParameters {
	replicas := int32(1)
	res := statefulSetParameters{
		Replicas:                      &replicas,
		ClusterMode:                   false,
		NodeConfVolume:                false,
		NodeSelector:                  cr.Spec.NodeSelector,
		PodSecurityContext:            cr.Spec.PodSecurityContext,
		PriorityClassName:             cr.Spec.PriorityClassName,
		Affinity:                      cr.Spec.Affinity,
		TerminationGracePeriodSeconds: cr.Spec.TerminationGracePeriodSeconds,
		Tolerations:                   cr.Spec.Tolerations,
		UpdateStrategy:                cr.Spec.KubernetesConfig.UpdateStrategy,
	}
	if cr.Spec.KubernetesConfig.ImagePullSecrets != nil {
		res.ImagePullSecrets = cr.Spec.KubernetesConfig.ImagePullSecrets
	}
	if cr.Spec.Storage != nil {
		res.PersistentVolumeClaim = cr.Spec.Storage.VolumeClaimTemplate
	}
	if cr.Spec.RedisConfig != nil {
		res.ExternalConfig = cr.Spec.RedisConfig.AdditionalRedisConfig
	}
	if cr.Spec.RedisExporter != nil {
		res.EnableMetrics = cr.Spec.RedisExporter.Enabled

	}
	if cr.Spec.ServiceAccountName != nil {
		res.ServiceAccountName = cr.Spec.ServiceAccountName
	}
	if _, found := cr.ObjectMeta.GetAnnotations()[AnnotationKeyRecreateStatefulset]; found {
		res.RecreateStatefulSet = true
	}
	return res
}

// generateRedisStandaloneContainerParams generates Redis container information
func generateRedisStandaloneContainerParams(cr *redisv1beta2.Redis) containerParameters {
	trueProperty := true
	falseProperty := false
	containerProp := containerParameters{
		Role:            "standalone",
		Image:           cr.Spec.KubernetesConfig.Image,
		ImagePullPolicy: cr.Spec.KubernetesConfig.ImagePullPolicy,
		Resources:       cr.Spec.KubernetesConfig.Resources,
		SecurityContext: cr.Spec.SecurityContext,
	}

	if cr.Spec.Storage != nil {
		containerProp.AdditionalVolume = cr.Spec.Storage.VolumeMount.Volume
		containerProp.AdditionalMountPath = cr.Spec.Storage.VolumeMount.MountPath
	}

	if cr.Spec.KubernetesConfig.ExistingPasswordSecret != nil {
		containerProp.EnabledPassword = &trueProperty
		containerProp.SecretName = cr.Spec.KubernetesConfig.ExistingPasswordSecret.Name
		containerProp.SecretKey = cr.Spec.KubernetesConfig.ExistingPasswordSecret.Key
	} else {
		containerProp.EnabledPassword = &falseProperty
	}
	if cr.Spec.RedisExporter != nil {
		containerProp.RedisExporterImage = cr.Spec.RedisExporter.Image
		containerProp.RedisExporterImagePullPolicy = cr.Spec.RedisExporter.ImagePullPolicy

		if cr.Spec.RedisExporter.Resources != nil {
			containerProp.RedisExporterResources = cr.Spec.RedisExporter.Resources
		}

		if cr.Spec.RedisExporter.EnvVars != nil {
			containerProp.RedisExporterEnv = cr.Spec.RedisExporter.EnvVars
		}

	}
	if cr.Spec.ReadinessProbe != nil {
		containerProp.ReadinessProbe = &cr.Spec.ReadinessProbe.Probe
	}
	if cr.Spec.LivenessProbe != nil {
		containerProp.LivenessProbe = &cr.Spec.LivenessProbe.Probe
	}
	if cr.Spec.Storage != nil {
		containerProp.PersistenceEnabled = &trueProperty
	}
	if cr.Spec.TLS != nil {
		containerProp.TLSConfig = cr.Spec.TLS
	}
	if cr.Spec.ACL != nil {
		containerProp.ACLConfig = cr.Spec.ACL
	}
	return containerProp
}

// generateRedisStandaloneInitContainerParams generates Redis initcontainer information
func generateRedisStandaloneInitContainerParams(cr *redisv1beta2.Redis) initContainerParameters {
	trueProperty := true
	initcontainerProp := initContainerParameters{}

	if cr.Spec.InitContainer != nil {
		initContainer := cr.Spec.InitContainer

		initcontainerProp = initContainerParameters{
			Enabled:               initContainer.Enabled,
			Role:                  "standalone",
			Image:                 initContainer.Image,
			ImagePullPolicy:       initContainer.ImagePullPolicy,
			Resources:             initContainer.Resources,
			AdditionalEnvVariable: initContainer.EnvVars,
			Command:               initContainer.Command,
			Arguments:             initContainer.Args,
		}

		if cr.Spec.Storage != nil {
			initcontainerProp.AdditionalVolume = cr.Spec.Storage.VolumeMount.Volume
			initcontainerProp.AdditionalMountPath = cr.Spec.Storage.VolumeMount.MountPath
		}
		if cr.Spec.Storage != nil {
			initcontainerProp.PersistenceEnabled = &trueProperty
		}

	}

	return initcontainerProp
}