replicaset.go

/*
Copyright (c) 2019 the Octant contributors. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/

package objectstatus

import (
	"context"
	"fmt"

	"github.com/vmware-tanzu/octant/internal/link"

	"github.com/pkg/errors"
	appsv1 "k8s.io/api/apps/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/client-go/kubernetes/scheme"

	"github.com/vmware-tanzu/octant/pkg/store"
	"github.com/vmware-tanzu/octant/pkg/view/component"
)

// replicaSetAppsV1 creates status for an v1/apps replica set. This is
// not the final implementation. It is included to generate output.
func replicaSetAppsV1(_ context.Context, object runtime.Object, _ store.Store, _ link.Interface) (ObjectStatus, error) {
	if object == nil {
		return ObjectStatus{}, errors.Errorf("replica set is nil")
	}

	replicaSet := &appsv1.ReplicaSet{}

	if err := scheme.Scheme.Convert(object, replicaSet, 0); err != nil {
		return ObjectStatus{}, errors.Wrap(err, "convert object to apps/v1 replica set")
	}

	status := replicaSet.Status
	specReplicas := int32(0)
	if r := replicaSet.Spec.Replicas; r != nil {
		specReplicas = *r
	}
	current := fmt.Sprintf("%d", replicaSet.Status.ReadyReplicas)
	desired := fmt.Sprintf("%d", specReplicas)

	properties := []component.Property{{Label: "Current Replicas", Value: component.NewText(current)},
		{Label: "Desired Replicas", Value: component.NewText(desired)}}

	switch {
	case status.Replicas == 0 && specReplicas != 0:
		return ObjectStatus{
			NodeStatus: component.NodeStatusError,
			Details:    []component.Component{component.NewText("Replica Set has no replicas available")},
			Properties: properties,
		}, nil
	case status.Replicas == status.AvailableReplicas:
		return ObjectStatus{NodeStatus: component.NodeStatusOK,
			Details:    []component.Component{component.NewText("Replica Set is OK")},
			Properties: properties,
		}, nil
	default:
		return ObjectStatus{
			NodeStatus: component.NodeStatusWarning,
			Details:    []component.Component{component.NewText(fmt.Sprintf("Expected %d replicas, but %d are available", status.Replicas, status.AvailableReplicas))},
			Properties: properties,
		}, nil
	}

}