Add etcd controller code

api/v1alpha1/etcd_types.go

@@ -17,41 +17,106 @@ limitations under the License.
 package v1alpha1
 
 import (
+	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
-// EDIT THIS FILE!  THIS IS SCAFFOLDING FOR YOU TO OWN!
-// NOTE: json tags are required.  Any new fields you add must have json tags for the fields to be serialized.
+// NOTE: json tags are required.  Any new fields you add must have json tags for
+// the fields to be serialized.
 
-// EtcdSpec defines the desired state of Etcd
+// EtcdSpec defines the desired state of an Etcd cluster managed by the operator
 type EtcdSpec struct {
-	// INSERT ADDITIONAL SPEC FIELDS - desired state of cluster
-	// Important: Run "make" to regenerate code after modifying this file
-	// The following markers will use OpenAPI v3 schema to validate the value
-	// More info: https://book.kubebuilder.io/reference/markers/crd-validation.html
+	// CellName is the name of the cell this Etcd belongs to.
+	// +kubebuilder:validation:MinLength=1
+	// +optional
+	CellName string `json:"cellName,omitempty"`
+
+	// Image is the container image for Etcd.
+	// NOTE: The version information is taken from Multigres repo's local
+	// provisioning setup:
+	// https://github.com/multigres/multigres/blob/38264ed3cb5049961a1e3d8a9de4836f8215ca76/go/provisioner/local/config.go#L186
+	// +kubebuilder:validation:MinLength=1
+	// +kubebuilder:default="gcr.io/etcd-development/etcd:v3.5.9"
+	// +optional
+	Image string `json:"image,omitempty"`
+
+	// ImagePullSecrets is an optional list of references to secrets in the same namespace
+	// to use for pulling the image.
+	// +optional
+	ImagePullSecrets []corev1.LocalObjectReference `json:"imagePullSecrets,omitempty"`
+
+	// Replicas is the desired number of Etcd members.
+	// For high availability, use an odd number (typically 3 or 5).
+	// +kubebuilder:validation:Minimum=0
+	// +kubebuilder:default=3
+	// +optional
+	Replicas *int32 `json:"replicas,omitempty"`
+
+	// Resources defines the resource requirements for the Etcd container.
+	// +optional
+	Resources corev1.ResourceRequirements `json:"resources,omitempty"`
+
+	// ServiceAccountName is the name of the ServiceAccount to use for the Etcd pods.
+	// +optional
+	ServiceAccountName string `json:"serviceAccountName,omitempty"`
+
+	// StorageClassName is the name of the StorageClass to use for Etcd data volumes.
+	// If not specified, the default StorageClass will be used.
+	// +optional
+	StorageClassName *string `json:"storageClassName,omitempty"`
+
+	// StorageSize is the size of the persistent volume for each Etcd member.
+	// +kubebuilder:default="10Gi"
+	// +optional
+	StorageSize string `json:"storageSize,omitempty"`
+
+	// VolumeClaimTemplate allows customization of the PersistentVolumeClaim for Etcd data.
+	// If specified, this takes precedence over StorageClassName and StorageSize.
+	// +optional
+	VolumeClaimTemplate *corev1.PersistentVolumeClaimSpec `json:"volumeClaimTemplate,omitempty"`
+
+	// Affinity defines pod affinity and anti-affinity rules.
+	// +optional
+	Affinity *corev1.Affinity `json:"affinity,omitempty"`
+
+	// Tolerations allows pods to schedule onto nodes with matching taints.
+	// +optional
+	Tolerations []corev1.Toleration `json:"tolerations,omitempty"`
+
+	// NodeSelector is a selector which must be true for the pod to fit on a node.
+	// +optional
+	NodeSelector map[string]string `json:"nodeSelector,omitempty"`
 
-	// foo is an example field of Etcd. Edit etcd_types.go to remove/update
+	// TopologySpreadConstraints controls how pods are spread across topology domains.
 	// +optional
-	Foo *string `json:"foo,omitempty"`
+	TopologySpreadConstraints []corev1.TopologySpreadConstraint `json:"topologySpreadConstraints,omitempty"`
+
+	// PodAnnotations are annotations to add to the Etcd pods.
+	// +optional
+	PodAnnotations map[string]string `json:"podAnnotations,omitempty"`
+
+	// PodLabels are additional labels to add to the Etcd pods.
+	// These are merged with the standard labels generated by the operator.
+	// In case of a key conflict, the operator's standard labels take precedence.
+	// +optional
+	PodLabels map[string]string `json:"podLabels,omitempty"`
 }
 
 // EtcdStatus defines the observed state of Etcd.
 type EtcdStatus struct {
-	// INSERT ADDITIONAL STATUS FIELD - define observed state of cluster
-	// Important: Run "make" to regenerate code after modifying this file
-
-	// For Kubernetes API conventions, see:
-	// https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/api-conventions.md#typical-status-properties
-
-	// conditions represent the current state of the Etcd resource.
-	// Each condition has a unique type and reflects the status of a specific aspect of the resource.
-	//
-	// Standard condition types include:
-	// - "Available": the resource is fully functional
-	// - "Progressing": the resource is being created or updated
-	// - "Degraded": the resource failed to reach or maintain its desired state
-	//
-	// The status of each condition is one of True, False, or Unknown.
+	// Ready indicates whether the Etcd cluster is healthy and available.
+	Ready bool `json:"ready"`
+
+	// Replicas is the desired number of Etcd members.
+	Replicas int32 `json:"replicas"`
+
+	// ReadyReplicas is the number of ready Etcd members.
+	ReadyReplicas int32 `json:"readyReplicas"`
+
+	// ObservedGeneration reflects the generation of the most recently observed Etcd spec.
+	ObservedGeneration int64 `json:"observedGeneration,omitempty"`
+
+	// Conditions represent the latest available observations of the Etcd cluster's state.
 	// +listType=map
 	// +listMapKey=type
 	// +optional
@@ -60,6 +125,10 @@ type EtcdStatus struct {
 
 // +kubebuilder:object:root=true
 // +kubebuilder:subresource:status
+// +kubebuilder:printcolumn:name="Ready",type=boolean,JSONPath=`.status.ready`
+// +kubebuilder:printcolumn:name="DesiredReplicas",type=string,JSONPath=`.status.replicas`
+// +kubebuilder:printcolumn:name="ReadyReplicas",type=string,JSONPath=`.status.readyReplicas`
+// +kubebuilder:printcolumn:name="Age",type=date,JSONPath=`.metadata.creationTimestamp`
 
 // Etcd is the Schema for the etcds API
 type Etcd struct {