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/
replicationcontroller.go
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/
replicationcontroller.go
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/*
Copyright (c) 2019 the Octant contributors. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package printer
import (
"context"
"fmt"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"github.com/vmware-tanzu/octant/pkg/store"
"github.com/vmware-tanzu/octant/pkg/view/component"
)
// ReplicationControllerListHandler is a printFunc that lists ReplicationControllers
func ReplicationControllerListHandler(ctx context.Context, list *corev1.ReplicationControllerList, options Options) (component.Component, error) {
if list == nil {
return nil, errors.New("nil list")
}
cols := component.NewTableCols("Name", "Labels", "Status", "Age", "Containers", "Selector")
ot := NewObjectTable("ReplicationControllers",
"We couldn't find any replication controllers!", cols, options.DashConfig.ObjectStore())
ot.EnablePluginStatus(options.DashConfig.PluginManager())
for _, rc := range list.Items {
row := component.TableRow{}
nameLink, err := options.Link.ForObject(&rc, rc.Name)
if err != nil {
return nil, err
}
row["Name"] = nameLink
row["Labels"] = component.NewLabels(rc.Labels)
status := fmt.Sprintf("%d/%d", rc.Status.AvailableReplicas, rc.Status.Replicas)
row["Status"] = component.NewText(status)
ts := rc.CreationTimestamp.Time
row["Age"] = component.NewTimestamp(ts)
containers := component.NewContainers()
for _, c := range rc.Spec.Template.Spec.Containers {
containers.Add(c.Name, c.Image)
}
row["Containers"] = containers
row["Selector"] = printSelectorMap(rc.Spec.Selector)
if err := ot.AddRowForObject(ctx, &rc, row); err != nil {
return nil, fmt.Errorf("add row for object: %w", err)
}
}
return ot.ToComponent()
}
// ReplicationControllerHandler is a printFunc that prints a ReplicationController
func ReplicationControllerHandler(ctx context.Context, rc *corev1.ReplicationController, options Options) (component.Component, error) {
o := NewObject(rc)
o.EnableEvents()
rch, err := newReplicationControllerHandler(rc, o)
if err != nil {
return nil, err
}
if err := rch.Config(options); err != nil {
return nil, errors.Wrap(err, "print replicationcontroller configuration")
}
if err := rch.Status(ctx, options); err != nil {
return nil, errors.Wrap(err, "print replicationcontroller status")
}
if err := rch.Pods(ctx, rc, options); err != nil {
return nil, errors.Wrap(err, "print replicationcontroller pods")
}
return o.ToComponent(ctx, options)
}
// ReplicationControllerConfiguration generates a replicationcontroller configuration
type ReplicationControllerConfiguration struct {
replicationController *corev1.ReplicationController
}
// NewReplicationControllerConfiguration creates an instance of ReplicationControllerConfiguration
func NewReplicationControllerConfiguration(rc *corev1.ReplicationController) *ReplicationControllerConfiguration {
return &ReplicationControllerConfiguration{
replicationController: rc,
}
}
// Create generates a replicationcontroller configuration summary
func (rcc *ReplicationControllerConfiguration) Create(options Options) (*component.Summary, error) {
if rcc == nil || rcc.replicationController == nil {
return nil, errors.New("replicationcontroller is nil")
}
replicationController := rcc.replicationController
sections := component.SummarySections{}
if controllerRef := metav1.GetControllerOf(replicationController); controllerRef != nil {
controlledBy, err := options.Link.ForOwner(replicationController, controllerRef)
if err != nil {
return nil, err
}
sections = append(sections, component.SummarySection{
Header: "Controlled By",
Content: controlledBy,
})
}
current := fmt.Sprintf("%d", replicationController.Status.ReadyReplicas)
if desired := replicationController.Spec.Replicas; desired != nil {
desiredReplicas := fmt.Sprintf("%d", *desired)
status := fmt.Sprintf("Current %s / Desired %s", current, desiredReplicas)
sections.AddText("Replica Status", status)
}
replicas := fmt.Sprintf("%d", replicationController.Status.Replicas)
sections.AddText("Replicas", replicas)
summary := component.NewSummary("Configuration", sections...)
return summary, nil
}
// ReplicationControllerStatus generates a replication controller status
type ReplicationControllerStatus struct {
context context.Context
namespace string
selector map[string]string
uid types.UID
objectStore store.Store
}
// NewReplicationControllerStatus creates an instance of ReplicationControllerStatus
func NewReplicationControllerStatus(ctx context.Context, replicationController *corev1.ReplicationController, options Options) *ReplicationControllerStatus {
return &ReplicationControllerStatus{
context: ctx,
namespace: replicationController.ObjectMeta.Namespace,
selector: replicationController.Spec.Selector,
uid: replicationController.GetUID(),
objectStore: options.DashConfig.ObjectStore(),
}
}
// Create generates a replicaset status quadrant
func (rcs *ReplicationControllerStatus) Create() (*component.Quadrant, error) {
if rcs == nil {
return nil, errors.New("replicationcontroller is nil")
}
selectors := metav1.LabelSelector{
MatchLabels: rcs.selector,
}
pods, err := listPods(rcs.context, rcs.namespace, &selectors, rcs.uid, rcs.objectStore)
if err != nil {
return nil, err
}
ps := createPodStatus(pods)
quadrant := component.NewQuadrant("Status")
if err := quadrant.Set(component.QuadNW, "Running", fmt.Sprintf("%d", ps.Running)); err != nil {
return nil, errors.New("unable to set quadrant nw")
}
if err := quadrant.Set(component.QuadNE, "Waiting", fmt.Sprintf("%d", ps.Waiting)); err != nil {
return nil, errors.New("unable to set quadrant ne")
}
if err := quadrant.Set(component.QuadSW, "Succeeded", fmt.Sprintf("%d", ps.Succeeded)); err != nil {
return nil, errors.New("unable to set quadrant sw")
}
if err := quadrant.Set(component.QuadSE, "Failed", fmt.Sprintf("%d", ps.Failed)); err != nil {
return nil, errors.New("unable to set quadrant se")
}
return quadrant, nil
}
type replicationControllerObject interface {
Config(options Options) error
Status(ctx context.Context, options Options) error
Pods(ctx context.Context, object runtime.Object, options Options) error
}
type replicationControllerHandler struct {
replicationController *corev1.ReplicationController
configFunc func(*corev1.ReplicationController, Options) (*component.Summary, error)
statusFunc func(context.Context, *corev1.ReplicationController, Options) (*component.Quadrant, error)
podFunc func(context.Context, runtime.Object, Options) (component.Component, error)
object *Object
}
var _ replicationControllerObject = (*replicaSetHandler)(nil)
func newReplicationControllerHandler(replicationController *corev1.ReplicationController, object *Object) (*replicationControllerHandler, error) {
if replicationController == nil {
return nil, errors.New("can't print a nil replicationcontroller")
}
if object == nil {
return nil, errors.New("can't print a replicationcontroller using a nil object printer")
}
rch := &replicationControllerHandler{
replicationController: replicationController,
configFunc: defaultReplicationControllerConfig,
statusFunc: defaultReplicationControllerStatus,
podFunc: defaultReplicationControllerPods,
object: object,
}
return rch, nil
}
func (r *replicationControllerHandler) Config(options Options) error {
out, err := r.configFunc(r.replicationController, options)
if err != nil {
return err
}
r.object.RegisterConfig(out)
return nil
}
func defaultReplicationControllerConfig(replicationController *corev1.ReplicationController, options Options) (*component.Summary, error) {
return NewReplicationControllerConfiguration(replicationController).Create(options)
}
func (r *replicationControllerHandler) Status(ctx context.Context, options Options) error {
if r.replicationController == nil {
return errors.New("can't display status for nil replicationcontroller")
}
r.object.RegisterItems(ItemDescriptor{
Width: component.WidthQuarter,
Func: func() (component.Component, error) {
return r.statusFunc(ctx, r.replicationController, options)
},
})
return nil
}
func defaultReplicationControllerStatus(ctx context.Context, replicationController *corev1.ReplicationController, options Options) (*component.Quadrant, error) {
return NewReplicationControllerStatus(ctx, replicationController, options).Create()
}
func (r *replicationControllerHandler) Pods(ctx context.Context, object runtime.Object, options Options) error {
r.object.EnablePodTemplate(*r.replicationController.Spec.Template)
r.object.RegisterItems(ItemDescriptor{
Width: component.WidthFull,
Func: func() (component.Component, error) {
return r.podFunc(ctx, object, options)
},
})
return nil
}
func defaultReplicationControllerPods(ctx context.Context, object runtime.Object, options Options) (component.Component, error) {
return createPodListView(ctx, object, options)
}