spec

type BackupPolicy struct {
	// SnapshotIntervalInSecond specifies the interval between two snapshots.
	// The default interval is 1800 seconds.
	SnapshotIntervalInSecond int `json:"snapshotIntervalInSecond"`
	// MaxSnapshot is the maximum number of snapshot files to retain. 0 is disable backup.
	// If backup is disabled, the etcd cluster cannot recover from a
	// disaster failure (lose more than half of its members at the same
	// time).
	MaxSnapshot int `json:"maxSnapshot"`
	// VolumeSizeInMB specifies the required volume size to perform backups.
	// Operator will claim the required size before creating the etcd cluster for backup
	// purpose.
	// If the snapshot size is larger than the size specified, backup fails.
	VolumeSizeInMB int `json:"volumeSizeInMB"`
	// StorageType specifies the type of storage device to store backup files.
	// If it's not set by user, the default is "PersistentVolume".
	StorageType BackupStorageType `json:"storageType"`
	// CleanupStorageIfDeleted specified whether we want to cleanup the backup data if cluster is deleted.
	// By default, operator will keep the backup data.
	CleanupBackupIfDeleted bool `json:"cleanupBackupIfDeleted"`
}

type BackupStorageType string

type ClusterSpec struct {
	// Size is the expected size of the etcd cluster.
	// The etcd-operator will eventually make the size of the running
	// cluster equal to the expected size.
	// The vaild range of the size is from 1 to 7.
	Size int `json:"size"`

	// NodeSelector specifies a map of key-value pairs. For the pod to be eligible
	// to run on a node, the node must have each of the indicated key-value pairs as
	// labels.
	NodeSelector map[string]string `json:"nodeSelector,omitempty"`

	// AntiAffinity determines if the etcd-operator tries to avoid putting
	// the etcd members in the same cluster onto the same node.
	AntiAffinity bool `json:"antiAffinity"`
	// Version is the expected version of the etcd cluster.
	// The etcd-operator will eventually make the etcd cluster version
	// equal to the expected version.
	Version string `json:"version"`
	// Backup is the backup policy for the etcd cluster.
	// There is no backup by default.
	Backup *BackupPolicy `json:"backup,omitempty"`
	// HostNetwork determines if the etcd pods should be run
	// in the host network namespace.
	HostNetwork bool `json:"hostNetwork,omitempty"`
	// Seed specifies a seed member for the cluster.
	// If there is no seed member, a completely new cluster will be created.
	// There is no seed member by default.
	Seed *SeedPolicy `json:"seed,omitempty"`
}

type EtcdCluster struct {
	unversioned.TypeMeta `json:",inline"`
	api.ObjectMeta       `json:"metadata,omitempty"`
	Spec                 ClusterSpec `json:"spec"`
}

type SeedPolicy struct {
	// The client endpoints of the seed member.
	MemberClientEndpoints []string
	// RemoveDelay specifies the delay to remove the original seed member from the
	// cluster in seconds.
	// The seed member will be removed in 30 second by default. Minimum delay is 10 seconds.
	RemoveDelay int
}