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podcommon.go
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podcommon.go
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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pod
import (
"github.com/kubernetes/dashboard/src/app/backend/resource/common"
"github.com/kubernetes/dashboard/src/app/backend/resource/dataselect"
"github.com/kubernetes/dashboard/src/app/backend/resource/metric"
"k8s.io/kubernetes/pkg/api"
)
// Gets restart count of given pod (total number of its containers restarts).
func getRestartCount(pod api.Pod) int32 {
var restartCount int32 = 0
for _, containerStatus := range pod.Status.ContainerStatuses {
restartCount += containerStatus.RestartCount
}
return restartCount
}
// getPodStatus returns a PodStatus object containing a summary of the pod's status.
func getPodStatus(pod api.Pod, warnings []common.Event) PodStatus {
var states []api.ContainerState
for _, containerStatus := range pod.Status.ContainerStatuses {
states = append(states, containerStatus.State)
}
return PodStatus{
Status: getPodStatusStatus(pod, warnings),
PodPhase: pod.Status.Phase,
ContainerStates: states,
}
}
// getPodStatus returns one of three pod statuses (pending, success, failed)
func getPodStatusStatus(pod api.Pod, warnings []common.Event) string {
if pod.Status.Phase == api.PodFailed {
return "failed"
}
ready := false
initialized := false
for _, c := range pod.Status.Conditions {
if c.Type == api.PodReady {
ready = c.Status == api.ConditionTrue
}
if c.Type == api.PodInitialized {
initialized = c.Status == api.ConditionTrue
}
}
if initialized && ready {
return "success"
}
// If the pod would otherwise be pending but has warning then label it as
// failed and show and error to the user.
if len(warnings) > 0 {
return "failed"
}
// Unknown?
return "pending"
}
// ToPod transforms Kubernetes pod object into object returned by API.
func ToPod(pod *api.Pod, metrics *common.MetricsByPod, warnings []common.Event) Pod {
podDetail := Pod{
ObjectMeta: common.NewObjectMeta(pod.ObjectMeta),
TypeMeta: common.NewTypeMeta(common.ResourceKindPod),
PodStatus: getPodStatus(*pod, warnings),
RestartCount: getRestartCount(*pod),
}
if metrics != nil && metrics.MetricsMap[pod.Namespace] != nil {
metric := metrics.MetricsMap[pod.Namespace][pod.Name]
podDetail.Metrics = &metric
}
return podDetail
}
// GetContainerImages returns container image strings from the given pod spec.
func GetContainerImages(podTemplate *api.PodSpec) []string {
var containerImages []string
for _, container := range podTemplate.Containers {
containerImages = append(containerImages, container.Image)
}
return containerImages
}
// The code below allows to perform complex data section on []api.Pod
type PodCell api.Pod
func (self PodCell) GetProperty(name dataselect.PropertyName) dataselect.ComparableValue {
switch name {
case dataselect.NameProperty:
return dataselect.StdComparableString(self.ObjectMeta.Name)
case dataselect.CreationTimestampProperty:
return dataselect.StdComparableTime(self.ObjectMeta.CreationTimestamp.Time)
case dataselect.NamespaceProperty:
return dataselect.StdComparableString(self.ObjectMeta.Namespace)
case dataselect.StatusProperty:
return dataselect.StdComparableString(self.Status.Phase)
default:
// if name is not supported then just return a constant dummy value, sort will have no effect.
return nil
}
}
func (self PodCell) GetResourceSelector() *metric.ResourceSelector {
return &metric.ResourceSelector{
Namespace: self.ObjectMeta.Namespace,
ResourceType: common.ResourceKindPod,
ResourceName: self.ObjectMeta.Name,
}
}
func toCells(std []api.Pod) []dataselect.DataCell {
cells := make([]dataselect.DataCell, len(std))
for i := range std {
cells[i] = PodCell(std[i])
}
return cells
}
func fromCells(cells []dataselect.DataCell) []api.Pod {
std := make([]api.Pod, len(cells))
for i := range std {
std[i] = api.Pod(cells[i].(PodCell))
}
return std
}
func getPodConditions(pod api.Pod) []common.Condition {
var conditions []common.Condition
for _, condition := range pod.Status.Conditions {
conditions = append(conditions, common.Condition{
Type: string(condition.Type),
Status: condition.Status,
LastProbeTime: condition.LastProbeTime,
LastTransitionTime: condition.LastTransitionTime,
Reason: condition.Reason,
Message: condition.Message,
})
}
return conditions
}