legacy

type AccessMode string

type Action struct {
	// Refers to the utility image that contains the command which can be utilized to retrieve or process role information.
	//
	// +optional
	Image string `json:"image,omitempty"`

	// A set of instructions that will be executed within the Container to retrieve or process role information. This field is required.
	//
	// +kubebuilder:validation:Required
	Command []string `json:"command"`

	// Additional parameters used to perform specific statements. This field is optional.
	//
	// +optional
	Args []string `json:"args,omitempty"`
}

type Credential struct {
	// Defines the user's name for the credential.
	// The corresponding environment variable will be KB_ITS_USERNAME.
	//
	// +kubebuilder:validation:Required
	Username CredentialVar `json:"username"`

	// Represents the user's password for the credential.
	// The corresponding environment variable will be KB_ITS_PASSWORD.
	//
	// +kubebuilder:validation:Required
	Password CredentialVar `json:"password"`
}

type CredentialVar struct {
	// Specifies the value of the environment variable. This field is optional and defaults to an empty string.
	// The value can include variable references in the format $(VAR_NAME) which will be expanded using previously defined environment variables in the container and any service environment variables.
	//
	// If a variable cannot be resolved, the reference in the input string will remain unchanged.
	// Double $$ can be used to escape the $(VAR_NAME) syntax, resulting in a single $ and producing the string literal "$(VAR_NAME)".
	// Escaped references will not be expanded, regardless of whether the variable exists or not.
	//
	// +optional
	Value string `json:"value,omitempty"`

	// Defines the source for the environment variable's value. This field is optional and cannot be used if the 'Value' field is not empty.
	//
	// +optional
	ValueFrom *corev1.EnvVarSource `json:"valueFrom,omitempty"`
}

type InstanceTemplate struct {
	// Specifies the name of the template.
	// Each instance of the template derives its name from the ReplicatedStateMachine Name, the template's Name and the instance's ordinal.
	// The constructed instance name follows the pattern $(rsm.name)-$(template.name)-$(ordinal).
	// The ordinal starts from 0 by default.
	//
	// +kubebuilder:validation:MaxLength=54
	// +kubebuilder:validation:Pattern:=`^[a-z0-9]([a-z0-9\.\-]*[a-z0-9])?$`
	// +kubebuilder:validation:Required
	Name string `json:"name"`

	// Number of replicas of this template.
	// Default is 1.
	// +kubebuilder:default=1
	// +kubebuilder:validation:Minimum=0
	// +optional
	Replicas *int32 `json:"replicas,omitempty"`

	// Defines annotations to override.
	// Add new or override existing annotations.
	// +optional
	Annotations map[string]string `json:"annotations,omitempty"`

	// Defines labels to override.
	// Add new or override existing labels.
	// +optional
	Labels map[string]string `json:"labels,omitempty"`

	// Defines image to override.
	// Will override the first container's image of the pod.
	// +optional
	Image *string `json:"image,omitempty"`

	// Defines NodeName to override.
	// +optional
	NodeName *string `json:"nodeName,omitempty"`

	// Defines NodeSelector to override.
	// +optional
	NodeSelector map[string]string `json:"nodeSelector,omitempty"`

	// Defines Tolerations to override.
	// Add new or override existing tolerations.
	// +optional
	Tolerations []corev1.Toleration `json:"tolerations,omitempty"`

	// Defines Resources to override.
	// Will override the first container's resources of the pod.
	// +optional
	Resources *corev1.ResourceRequirements `json:"resources,omitempty"`

	// Defines Env to override.
	// Add new or override existing envs.
	// +optional
	Env []corev1.EnvVar `json:"env,omitempty"`

	// Defines Volumes to override.
	// Add new or override existing volumes.
	// +optional
	Volumes []corev1.Volume `json:"volumes,omitempty"`

	// Defines VolumeMounts to override.
	// Add new or override existing volume mounts of the first container in the pod.
	// +optional
	VolumeMounts []corev1.VolumeMount `json:"volumeMounts,omitempty"`

	// Defines VolumeClaimTemplates to override.
	// Add new or override existing volume claim templates.
	// +optional
	VolumeClaimTemplates []corev1.PersistentVolumeClaim `json:"volumeClaimTemplates,omitempty"`
}

type MemberStatus struct {
	// Represents the name of the pod.
	//
	// +kubebuilder:validation:Required
	// +kubebuilder:default=Unknown
	PodName string `json:"podName"`

	// Defines the role of the replica in the cluster.
	//
	// +optional
	ReplicaRole *ReplicaRole `json:"role,omitempty"`

	// Whether the corresponding Pod is in ready condition.
	// +optional
	Ready bool `json:"ready,omitempty"`

	// Indicates whether it is required for the ReplicatedStateMachine to have at least one primary pod ready.
	//
	// +optional
	ReadyWithoutPrimary bool `json:"readyWithoutPrimary"`
}

type MemberUpdateStrategy string

type MembershipReconfiguration struct {
	// Specifies the environment variables that can be used in all following Actions:
	// - KB_ITS_USERNAME: Represents the username part of the credential
	// - KB_ITS_PASSWORD: Represents the password part of the credential
	// - KB_ITS_LEADER_HOST: Represents the leader host
	// - KB_ITS_TARGET_HOST: Represents the target host
	// - KB_ITS_SERVICE_PORT: Represents the service port
	//
	// Defines the action to perform a switchover.
	// If the Image is not configured, the latest [BusyBox](https://busybox.net/) image will be used.
	//
	// +optional
	SwitchoverAction *Action `json:"switchoverAction,omitempty"`

	// Defines the action to add a member.
	// If the Image is not configured, the Image from the previous non-nil action will be used.
	//
	// +optional
	MemberJoinAction *Action `json:"memberJoinAction,omitempty"`

	// Defines the action to remove a member.
	// If the Image is not configured, the Image from the previous non-nil action will be used.
	//
	// +optional
	MemberLeaveAction *Action `json:"memberLeaveAction,omitempty"`

	// Defines the action to trigger the new member to start log syncing.
	// If the Image is not configured, the Image from the previous non-nil action will be used.
	//
	// +optional
	LogSyncAction *Action `json:"logSyncAction,omitempty"`

	// Defines the action to inform the cluster that the new member can join voting now.
	// If the Image is not configured, the Image from the previous non-nil action will be used.
	//
	// +optional
	PromoteAction *Action `json:"promoteAction,omitempty"`
}

type ReplicaRole struct {

	// Defines the role name of the replica.
	//
	// +kubebuilder:validation:Required
	// +kubebuilder:default=leader
	Name string `json:"name"`

	// Specifies the service capabilities of this member.
	//
	// +kubebuilder:validation:Required
	// +kubebuilder:default=ReadWrite
	// +kubebuilder:validation:Enum={None, Readonly, ReadWrite}
	AccessMode AccessMode `json:"accessMode"`

	// Indicates if this member has voting rights.
	//
	// +kubebuilder:default=true
	// +optional
	CanVote bool `json:"canVote"`

	// Determines if this member is the leader.
	//
	// +kubebuilder:default=false
	// +optional
	IsLeader bool `json:"isLeader"`
}

type ReplicatedStateMachine struct {
	// The metadata for the type, like API version and kind.
	metav1.TypeMeta `json:",inline"`

	// Contains the metadata for the particular object, such as name, namespace, labels, and annotations.
	metav1.ObjectMeta `json:"metadata,omitempty"`

	// Defines the desired state of the state machine. It includes the configuration details for the state machine.
	//
	Spec ReplicatedStateMachineSpec `json:"spec,omitempty"`

	// Represents the current information about the state machine. This data may be out of date.
	//
	Status ReplicatedStateMachineStatus `json:"status,omitempty"`
}

type ReplicatedStateMachineList struct {
	metav1.TypeMeta `json:",inline"`
	metav1.ListMeta `json:"metadata,omitempty"`
	Items           []ReplicatedStateMachine `json:"items"`
}

type ReplicatedStateMachineSpec struct {
	// Specifies the desired number of replicas of the given Template.
	// These replicas are instantiations of the same Template, with each having a consistent identity.
	// Defaults to 1 if unspecified.
	// +kubebuilder:default=1
	// +kubebuilder:validation:Minimum=0
	// +optional
	Replicas *int32 `json:"replicas,omitempty"`

	// Defines the minimum number of seconds a newly created pod should be ready
	// without any of its container crashing to be considered available.
	// Defaults to 0, meaning the pod will be considered available as soon as it is ready.
	// +kubebuilder:default=0
	// +kubebuilder:validation:Minimum=0
	// +optional
	MinReadySeconds int32 `json:"minReadySeconds,omitempty"`

	// Represents a label query over pods that should match the replica count.
	// It must match the pod template's labels.
	// More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors
	Selector *metav1.LabelSelector `json:"selector"`

	// Refers to the name of the service that governs this StatefulSet.
	// This service must exist before the StatefulSet and is responsible for
	// the network identity of the set. Pods get DNS/hostnames that follow a specific pattern.
	ServiceName string `json:"serviceName"`

	// Defines the behavior of a service spec.
	// Provides read-write service.
	// https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-status
	// +kubebuilder:pruning:PreserveUnknownFields
	// +optional
	Service *corev1.Service `json:"service,omitempty"`

	// Defines Alternative Services selector pattern specifier.
	// Can be used for creating Readonly service.
	// +optional
	AlternativeServices []corev1.Service `json:"alternativeServices,omitempty"`

	Template corev1.PodTemplateSpec `json:"template"`

	// Overrides values in default Template.
	//
	// Instance is the fundamental unit managed by KubeBlocks.
	// It represents a Pod with additional objects such as PVCs, Services, ConfigMaps, etc.
	// An ReplicatedStateMachine manages instances with a total count of Replicas,
	// and by default, all these instances are generated from the same template.
	// The InstanceTemplate provides a way to override values in the default template,
	// allowing the ReplicatedStateMachine to manage instances from different templates.
	//
	// The naming convention for instances (pods) based on the ReplicatedStateMachine Name, InstanceTemplate Name, and ordinal.
	// The constructed instance name follows the pattern: $(instance_set.name)-$(template.name)-$(ordinal).
	// By default, the ordinal starts from 0 for each InstanceTemplate.
	// It is important to ensure that the Name of each InstanceTemplate is unique.
	//
	// The sum of replicas across all InstanceTemplates should not exceed the total number of Replicas specified for the ReplicatedStateMachine.
	// Any remaining replicas will be generated using the default template and will follow the default naming rules.
	//
	// +optional
	Instances []InstanceTemplate `json:"instances,omitempty" patchStrategy:"merge,retainKeys" patchMergeKey:"name"`

	// Specifies instances to be scaled in with dedicated names in the list.
	//
	// +optional
	OfflineInstances []string `json:"offlineInstances,omitempty"`

	// Represents a list of claims that pods are allowed to reference.
	// The ReplicatedStateMachine controller is responsible for mapping network identities to
	// claims in a way that maintains the identity of a pod. Every claim in
	// this list must have at least one matching (by name) volumeMount in one
	// container in the template. A claim in this list takes precedence over
	// any volumes in the template, with the same name.
	// +optional
	VolumeClaimTemplates []corev1.PersistentVolumeClaim `json:"volumeClaimTemplates,omitempty"`

	// Controls how pods are created during initial scale up,
	// when replacing pods on nodes, or when scaling down.
	//
	// The default policy is `OrderedReady`, where pods are created in increasing order and the controller waits until each pod is ready before
	// continuing. When scaling down, the pods are removed in the opposite order.
	// The alternative policy is `Parallel` which will create pods in parallel
	// to match the desired scale without waiting, and on scale down will delete
	// all pods at once.
	//
	// +optional
	PodManagementPolicy appsv1.PodManagementPolicyType `json:"podManagementPolicy,omitempty"`

	// Indicates the StatefulSetUpdateStrategy that will be
	// employed to update Pods in the ReplicatedStateMachine when a revision is made to
	// Template.
	// UpdateStrategy.Type will be set to appsv1.OnDeleteStatefulSetStrategyType if MemberUpdateStrategy is not nil
	UpdateStrategy appsv1.StatefulSetUpdateStrategy `json:"updateStrategy,omitempty"`

	// A list of roles defined in the system.
	// +optional
	Roles []ReplicaRole `json:"roles,omitempty"`

	// Provides method to probe role.
	// +optional
	RoleProbe *RoleProbe `json:"roleProbe,omitempty"`

	// Provides actions to do membership dynamic reconfiguration.
	// +optional
	MembershipReconfiguration *MembershipReconfiguration `json:"membershipReconfiguration,omitempty"`

	// Members(Pods) update strategy.
	//
	// - serial: update Members one by one that guarantee minimum component unavailable time.
	// - bestEffortParallel: update Members in parallel that guarantee minimum component un-writable time.
	// - parallel: force parallel
	//
	// +kubebuilder:validation:Enum={Serial,BestEffortParallel,Parallel}
	// +optional
	MemberUpdateStrategy *MemberUpdateStrategy `json:"memberUpdateStrategy,omitempty"`

	// Indicates that the ReplicatedStateMachine is paused, meaning the reconciliation of this ReplicatedStateMachine object will be paused.
	// +optional
	Paused bool `json:"paused,omitempty"`

	// Credential used to connect to DB engine
	// +optional
	Credential *Credential `json:"credential,omitempty"`
}

type ReplicatedStateMachineStatus struct {
	appsv1.StatefulSetStatus `json:",inline"`

	// Defines the initial number of pods (members) when the cluster is first initialized.
	// This value is set to spec.Replicas at the time of object creation and remains constant thereafter.
	InitReplicas int32 `json:"initReplicas"`

	// Represents the number of pods (members) that have already reached the MembersStatus during the cluster initialization stage.
	// This value remains constant once it equals InitReplicas.
	//
	// +optional
	ReadyInitReplicas int32 `json:"readyInitReplicas,omitempty"`

	// When not empty, indicates the version of the ReplicatedStateMachine used to generate the underlying workload.
	//
	// +optional
	CurrentGeneration int64 `json:"currentGeneration,omitempty"`

	// Provides the status of each member in the cluster.
	//
	// +optional
	MembersStatus []MemberStatus `json:"membersStatus,omitempty"`

	// currentRevisions, if not empty, indicates the old version of the ReplicatedStateMachine used to generate the underlying workload.
	// key is the pod name, value is the revision.
	//
	// +optional
	CurrentRevisions map[string]string `json:"currentRevisions,omitempty"`

	// updateRevisions, if not empty, indicates the new version of the ReplicatedStateMachine used to generate the underlying workload.
	// key is the pod name, value is the revision.
	//
	// +optional
	UpdateRevisions map[string]string `json:"updateRevisions,omitempty"`
}

type RoleProbe struct {
	// Specifies the builtin handler name to use to probe the role of the main container.
	// Available handlers include: mysql, postgres, mongodb, redis, etcd, kafka.
	// Use CustomHandler to define a custom role probe function if none of the built-in handlers meet the requirement.
	//
	// +optional
	BuiltinHandler *string `json:"builtinHandlerName,omitempty"`

	// Defines a custom method for role probing.
	// If the BuiltinHandler meets the requirement, use it instead.
	// Actions defined here are executed in series.
	// Upon completion of all actions, the final output should be a single string representing the role name defined in spec.Roles.
	// The latest [BusyBox](https://busybox.net/) image will be used if Image is not configured.
	// Environment variables can be used in Command:
	// - v_KB_ITS_LAST_STDOUT: stdout from the last action, watch for 'v_' prefix
	// - KB_ITS_USERNAME: username part of the credential
	// - KB_ITS_PASSWORD: password part of the credential
	//
	// +optional
	CustomHandler []Action `json:"customHandler,omitempty"`

	// Specifies the number of seconds to wait after the container has started before initiating role probing.
	//
	// +kubebuilder:default=0
	// +kubebuilder:validation:Minimum=0
	// +optional
	InitialDelaySeconds int32 `json:"initialDelaySeconds,omitempty"`

	// Specifies the number of seconds after which the probe times out.
	//
	// +kubebuilder:default=1
	// +kubebuilder:validation:Minimum=1
	// +optional
	TimeoutSeconds int32 `json:"timeoutSeconds,omitempty"`

	// Specifies the frequency (in seconds) of probe execution.
	//
	// +kubebuilder:default=2
	// +kubebuilder:validation:Minimum=1
	// +optional
	PeriodSeconds int32 `json:"periodSeconds,omitempty"`

	// Specifies the minimum number of consecutive successes for the probe to be considered successful after having failed.
	//
	// +kubebuilder:default=1
	// +kubebuilder:validation:Minimum=1
	// +optional
	SuccessThreshold int32 `json:"successThreshold,omitempty"`

	// Specifies the minimum number of consecutive failures for the probe to be considered failed after having succeeded.
	//
	// +kubebuilder:default=3
	// +kubebuilder:validation:Minimum=1
	// +optional
	FailureThreshold int32 `json:"failureThreshold,omitempty"`

	// Specifies the method for updating the pod role label.
	//
	// +kubebuilder:default=ReadinessProbeEventUpdate
	// +kubebuilder:validation:Enum={ReadinessProbeEventUpdate, DirectAPIServerEventUpdate}
	// +optional
	RoleUpdateMechanism RoleUpdateMechanism `json:"roleUpdateMechanism,omitempty"`
}

type RoleUpdateMechanism string