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container.go
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container.go
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/*
Copyright 2016 The Kubernetes Authors.
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 node
import (
"context"
"fmt"
"time"
v1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/uuid"
podutil "k8s.io/kubernetes/pkg/api/v1/pod"
"k8s.io/kubernetes/test/e2e/framework"
)
const (
// ContainerStatusRetryTimeout represents polling threshold before giving up to get the container status
ContainerStatusRetryTimeout = time.Minute * 5
// ContainerStatusPollInterval represents duration between polls to get the container status
ContainerStatusPollInterval = time.Second * 1
)
// ConformanceContainer defines the types for running container conformance test cases
// One pod one container
type ConformanceContainer struct {
Container v1.Container
RestartPolicy v1.RestartPolicy
Volumes []v1.Volume
ImagePullSecrets []string
PodClient *framework.PodClient
podName string
PodSecurityContext *v1.PodSecurityContext
}
// Create creates the defined conformance container
func (cc *ConformanceContainer) Create() {
cc.podName = cc.Container.Name + string(uuid.NewUUID())
imagePullSecrets := []v1.LocalObjectReference{}
for _, s := range cc.ImagePullSecrets {
imagePullSecrets = append(imagePullSecrets, v1.LocalObjectReference{Name: s})
}
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: cc.podName,
},
Spec: v1.PodSpec{
RestartPolicy: cc.RestartPolicy,
Containers: []v1.Container{
cc.Container,
},
SecurityContext: cc.PodSecurityContext,
Volumes: cc.Volumes,
ImagePullSecrets: imagePullSecrets,
},
}
cc.PodClient.Create(pod)
}
// Delete deletes the defined conformance container
func (cc *ConformanceContainer) Delete() error {
return cc.PodClient.Delete(context.TODO(), cc.podName, *metav1.NewDeleteOptions(0))
}
// IsReady returns whether this container is ready and error if any
func (cc *ConformanceContainer) IsReady() (bool, error) {
pod, err := cc.PodClient.Get(context.TODO(), cc.podName, metav1.GetOptions{})
if err != nil {
return false, err
}
return podutil.IsPodReady(pod), nil
}
// GetPhase returns the phase of the pod lifecycle and error if any
func (cc *ConformanceContainer) GetPhase() (v1.PodPhase, error) {
pod, err := cc.PodClient.Get(context.TODO(), cc.podName, metav1.GetOptions{})
if err != nil {
// it doesn't matter what phase to return as error would not be nil
return v1.PodSucceeded, err
}
return pod.Status.Phase, nil
}
// GetStatus returns the details of the current status of this container and error if any
func (cc *ConformanceContainer) GetStatus() (v1.ContainerStatus, error) {
pod, err := cc.PodClient.Get(context.TODO(), cc.podName, metav1.GetOptions{})
if err != nil {
return v1.ContainerStatus{}, err
}
statuses := pod.Status.ContainerStatuses
if len(statuses) != 1 || statuses[0].Name != cc.Container.Name {
return v1.ContainerStatus{}, fmt.Errorf("unexpected container statuses %v", statuses)
}
return statuses[0], nil
}
// Present returns whether this pod is present and error if any
func (cc *ConformanceContainer) Present() (bool, error) {
_, err := cc.PodClient.Get(context.TODO(), cc.podName, metav1.GetOptions{})
if err == nil {
return true, nil
}
if apierrors.IsNotFound(err) {
return false, nil
}
return false, err
}
// ContainerState represents different states of its lifecycle
type ContainerState string
const (
// ContainerStateWaiting represents 'Waiting' container state
ContainerStateWaiting ContainerState = "Waiting"
// ContainerStateRunning represents 'Running' container state
ContainerStateRunning ContainerState = "Running"
// ContainerStateTerminated represents 'Terminated' container state
ContainerStateTerminated ContainerState = "Terminated"
// ContainerStateUnknown represents 'Unknown' container state
ContainerStateUnknown ContainerState = "Unknown"
)
// GetContainerState returns current state the container represents among its lifecyle
func GetContainerState(state v1.ContainerState) ContainerState {
if state.Waiting != nil {
return ContainerStateWaiting
}
if state.Running != nil {
return ContainerStateRunning
}
if state.Terminated != nil {
return ContainerStateTerminated
}
return ContainerStateUnknown
}