ceph-csi/vendor/k8s.io/kubernetes/test/utils/runners.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 utils
import (
"fmt"
"math"
"os"
"sync"
"time"
batch "k8s.io/api/batch/v1"
"k8s.io/api/core/v1"
extensions "k8s.io/api/extensions/v1beta1"
apiequality "k8s.io/apimachinery/pkg/api/equality"
apierrs "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/uuid"
"k8s.io/apimachinery/pkg/util/wait"
clientset "k8s.io/client-go/kubernetes"
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scaleclient "k8s.io/client-go/scale"
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"k8s.io/client-go/util/workqueue"
batchinternal "k8s.io/kubernetes/pkg/apis/batch"
api "k8s.io/kubernetes/pkg/apis/core"
extensionsinternal "k8s.io/kubernetes/pkg/apis/extensions"
"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
"github.com/golang/glog"
)
const (
// String used to mark pod deletion
nonExist = "NonExist"
)
func removePtr(replicas *int32) int32 {
if replicas == nil {
return 0
}
return *replicas
}
func WaitUntilPodIsScheduled(c clientset.Interface, name, namespace string, timeout time.Duration) (*v1.Pod, error) {
// Wait until it's scheduled
p, err := c.CoreV1().Pods(namespace).Get(name, metav1.GetOptions{ResourceVersion: "0"})
if err == nil && p.Spec.NodeName != "" {
return p, nil
}
pollingPeriod := 200 * time.Millisecond
startTime := time.Now()
for startTime.Add(timeout).After(time.Now()) {
time.Sleep(pollingPeriod)
p, err := c.CoreV1().Pods(namespace).Get(name, metav1.GetOptions{ResourceVersion: "0"})
if err == nil && p.Spec.NodeName != "" {
return p, nil
}
}
return nil, fmt.Errorf("Timed out after %v when waiting for pod %v/%v to start.", timeout, namespace, name)
}
func RunPodAndGetNodeName(c clientset.Interface, pod *v1.Pod, timeout time.Duration) (string, error) {
name := pod.Name
namespace := pod.Namespace
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if err := CreatePodWithRetries(c, namespace, pod); err != nil {
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return "", err
}
p, err := WaitUntilPodIsScheduled(c, name, namespace, timeout)
if err != nil {
return "", err
}
return p.Spec.NodeName, nil
}
type RunObjectConfig interface {
Run() error
GetName() string
GetNamespace() string
GetKind() schema.GroupKind
GetClient() clientset.Interface
GetInternalClient() internalclientset.Interface
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GetScalesGetter() scaleclient.ScalesGetter
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SetClient(clientset.Interface)
SetInternalClient(internalclientset.Interface)
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SetScalesClient(scaleclient.ScalesGetter)
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GetReplicas() int
GetLabelValue(string) (string, bool)
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GetGroupResource() schema.GroupResource
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}
type RCConfig struct {
Affinity *v1.Affinity
Client clientset.Interface
InternalClient internalclientset.Interface
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ScalesGetter scaleclient.ScalesGetter
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Image string
Command []string
Name string
Namespace string
PollInterval time.Duration
Timeout time.Duration
PodStatusFile *os.File
Replicas int
CpuRequest int64 // millicores
CpuLimit int64 // millicores
MemRequest int64 // bytes
MemLimit int64 // bytes
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GpuLimit int64 // count
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ReadinessProbe *v1.Probe
DNSPolicy *v1.DNSPolicy
PriorityClassName string
// Env vars, set the same for every pod.
Env map[string]string
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// Extra labels and annotations added to every pod.
Labels map[string]string
Annotations map[string]string
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// Node selector for pods in the RC.
NodeSelector map[string]string
// Ports to declare in the container (map of name to containerPort).
Ports map[string]int
// Ports to declare in the container as host and container ports.
HostPorts map[string]int
Volumes []v1.Volume
VolumeMounts []v1.VolumeMount
// Pointer to a list of pods; if non-nil, will be set to a list of pods
// created by this RC by RunRC.
CreatedPods *[]*v1.Pod
// Maximum allowable container failures. If exceeded, RunRC returns an error.
// Defaults to replicas*0.1 if unspecified.
MaxContainerFailures *int
// If set to false starting RC will print progress, otherwise only errors will be printed.
Silent bool
// If set this function will be used to print log lines instead of glog.
LogFunc func(fmt string, args ...interface{})
// If set those functions will be used to gather data from Nodes - in integration tests where no
// kubelets are running those variables should be nil.
NodeDumpFunc func(c clientset.Interface, nodeNames []string, logFunc func(fmt string, args ...interface{}))
ContainerDumpFunc func(c clientset.Interface, ns string, logFunc func(ftm string, args ...interface{}))
// Names of the secrets and configmaps to mount.
SecretNames []string
ConfigMapNames []string
}
func (rc *RCConfig) RCConfigLog(fmt string, args ...interface{}) {
if rc.LogFunc != nil {
rc.LogFunc(fmt, args...)
}
glog.Infof(fmt, args...)
}
type DeploymentConfig struct {
RCConfig
}
type ReplicaSetConfig struct {
RCConfig
}
type JobConfig struct {
RCConfig
}
// podInfo contains pod information useful for debugging e2e tests.
type podInfo struct {
oldHostname string
oldPhase string
hostname string
phase string
}
// PodDiff is a map of pod name to podInfos
type PodDiff map[string]*podInfo
// Print formats and prints the give PodDiff.
func (p PodDiff) String(ignorePhases sets.String) string {
ret := ""
for name, info := range p {
if ignorePhases.Has(info.phase) {
continue
}
if info.phase == nonExist {
ret += fmt.Sprintf("Pod %v was deleted, had phase %v and host %v\n", name, info.oldPhase, info.oldHostname)
continue
}
phaseChange, hostChange := false, false
msg := fmt.Sprintf("Pod %v ", name)
if info.oldPhase != info.phase {
phaseChange = true
if info.oldPhase == nonExist {
msg += fmt.Sprintf("in phase %v ", info.phase)
} else {
msg += fmt.Sprintf("went from phase: %v -> %v ", info.oldPhase, info.phase)
}
}
if info.oldHostname != info.hostname {
hostChange = true
if info.oldHostname == nonExist || info.oldHostname == "" {
msg += fmt.Sprintf("assigned host %v ", info.hostname)
} else {
msg += fmt.Sprintf("went from host: %v -> %v ", info.oldHostname, info.hostname)
}
}
if phaseChange || hostChange {
ret += msg + "\n"
}
}
return ret
}
// Diff computes a PodDiff given 2 lists of pods.
func Diff(oldPods []*v1.Pod, curPods []*v1.Pod) PodDiff {
podInfoMap := PodDiff{}
// New pods will show up in the curPods list but not in oldPods. They have oldhostname/phase == nonexist.
for _, pod := range curPods {
podInfoMap[pod.Name] = &podInfo{hostname: pod.Spec.NodeName, phase: string(pod.Status.Phase), oldHostname: nonExist, oldPhase: nonExist}
}
// Deleted pods will show up in the oldPods list but not in curPods. They have a hostname/phase == nonexist.
for _, pod := range oldPods {
if info, ok := podInfoMap[pod.Name]; ok {
info.oldHostname, info.oldPhase = pod.Spec.NodeName, string(pod.Status.Phase)
} else {
podInfoMap[pod.Name] = &podInfo{hostname: nonExist, phase: nonExist, oldHostname: pod.Spec.NodeName, oldPhase: string(pod.Status.Phase)}
}
}
return podInfoMap
}
// RunDeployment Launches (and verifies correctness) of a Deployment
// and will wait for all pods it spawns to become "Running".
// It's the caller's responsibility to clean up externally (i.e. use the
// namespace lifecycle for handling Cleanup).
func RunDeployment(config DeploymentConfig) error {
err := config.create()
if err != nil {
return err
}
return config.start()
}
func (config *DeploymentConfig) Run() error {
return RunDeployment(*config)
}
func (config *DeploymentConfig) GetKind() schema.GroupKind {
return extensionsinternal.Kind("Deployment")
}
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func (config *DeploymentConfig) GetGroupResource() schema.GroupResource {
return extensionsinternal.Resource("deployments")
}
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func (config *DeploymentConfig) create() error {
deployment := &extensions.Deployment{
ObjectMeta: metav1.ObjectMeta{
Name: config.Name,
},
Spec: extensions.DeploymentSpec{
Replicas: func(i int) *int32 { x := int32(i); return &x }(config.Replicas),
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{
"name": config.Name,
},
},
Template: v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
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Labels: map[string]string{"name": config.Name},
Annotations: config.Annotations,
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},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: config.Name,
Image: config.Image,
Command: config.Command,
Ports: []v1.ContainerPort{{ContainerPort: 80}},
},
},
},
},
},
}
if len(config.SecretNames) > 0 {
attachSecrets(&deployment.Spec.Template, config.SecretNames)
}
if len(config.ConfigMapNames) > 0 {
attachConfigMaps(&deployment.Spec.Template, config.ConfigMapNames)
}
config.applyTo(&deployment.Spec.Template)
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if err := CreateDeploymentWithRetries(config.Client, config.Namespace, deployment); err != nil {
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return fmt.Errorf("Error creating deployment: %v", err)
}
config.RCConfigLog("Created deployment with name: %v, namespace: %v, replica count: %v", deployment.Name, config.Namespace, removePtr(deployment.Spec.Replicas))
return nil
}
// RunReplicaSet launches (and verifies correctness) of a ReplicaSet
// and waits until all the pods it launches to reach the "Running" state.
// It's the caller's responsibility to clean up externally (i.e. use the
// namespace lifecycle for handling Cleanup).
func RunReplicaSet(config ReplicaSetConfig) error {
err := config.create()
if err != nil {
return err
}
return config.start()
}
func (config *ReplicaSetConfig) Run() error {
return RunReplicaSet(*config)
}
func (config *ReplicaSetConfig) GetKind() schema.GroupKind {
return extensionsinternal.Kind("ReplicaSet")
}
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func (config *ReplicaSetConfig) GetGroupResource() schema.GroupResource {
return extensionsinternal.Resource("replicasets")
}
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func (config *ReplicaSetConfig) create() error {
rs := &extensions.ReplicaSet{
ObjectMeta: metav1.ObjectMeta{
Name: config.Name,
},
Spec: extensions.ReplicaSetSpec{
Replicas: func(i int) *int32 { x := int32(i); return &x }(config.Replicas),
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{
"name": config.Name,
},
},
Template: v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
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Labels: map[string]string{"name": config.Name},
Annotations: config.Annotations,
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},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: config.Name,
Image: config.Image,
Command: config.Command,
Ports: []v1.ContainerPort{{ContainerPort: 80}},
},
},
},
},
},
}
if len(config.SecretNames) > 0 {
attachSecrets(&rs.Spec.Template, config.SecretNames)
}
if len(config.ConfigMapNames) > 0 {
attachConfigMaps(&rs.Spec.Template, config.ConfigMapNames)
}
config.applyTo(&rs.Spec.Template)
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if err := CreateReplicaSetWithRetries(config.Client, config.Namespace, rs); err != nil {
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return fmt.Errorf("Error creating replica set: %v", err)
}
config.RCConfigLog("Created replica set with name: %v, namespace: %v, replica count: %v", rs.Name, config.Namespace, removePtr(rs.Spec.Replicas))
return nil
}
// RunJob baunches (and verifies correctness) of a Job
// and will wait for all pods it spawns to become "Running".
// It's the caller's responsibility to clean up externally (i.e. use the
// namespace lifecycle for handling Cleanup).
func RunJob(config JobConfig) error {
err := config.create()
if err != nil {
return err
}
return config.start()
}
func (config *JobConfig) Run() error {
return RunJob(*config)
}
func (config *JobConfig) GetKind() schema.GroupKind {
return batchinternal.Kind("Job")
}
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func (config *JobConfig) GetGroupResource() schema.GroupResource {
return batchinternal.Resource("jobs")
}
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func (config *JobConfig) create() error {
job := &batch.Job{
ObjectMeta: metav1.ObjectMeta{
Name: config.Name,
},
Spec: batch.JobSpec{
Parallelism: func(i int) *int32 { x := int32(i); return &x }(config.Replicas),
Completions: func(i int) *int32 { x := int32(i); return &x }(config.Replicas),
Template: v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
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Labels: map[string]string{"name": config.Name},
Annotations: config.Annotations,
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},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: config.Name,
Image: config.Image,
Command: config.Command,
},
},
RestartPolicy: v1.RestartPolicyOnFailure,
},
},
},
}
if len(config.SecretNames) > 0 {
attachSecrets(&job.Spec.Template, config.SecretNames)
}
if len(config.ConfigMapNames) > 0 {
attachConfigMaps(&job.Spec.Template, config.ConfigMapNames)
}
config.applyTo(&job.Spec.Template)
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if err := CreateJobWithRetries(config.Client, config.Namespace, job); err != nil {
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return fmt.Errorf("Error creating job: %v", err)
}
config.RCConfigLog("Created job with name: %v, namespace: %v, parallelism/completions: %v", job.Name, config.Namespace, job.Spec.Parallelism)
return nil
}
// RunRC Launches (and verifies correctness) of a Replication Controller
// and will wait for all pods it spawns to become "Running".
// It's the caller's responsibility to clean up externally (i.e. use the
// namespace lifecycle for handling Cleanup).
func RunRC(config RCConfig) error {
err := config.create()
if err != nil {
return err
}
return config.start()
}
func (config *RCConfig) Run() error {
return RunRC(*config)
}
func (config *RCConfig) GetName() string {
return config.Name
}
func (config *RCConfig) GetNamespace() string {
return config.Namespace
}
func (config *RCConfig) GetKind() schema.GroupKind {
return api.Kind("ReplicationController")
}
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func (config *RCConfig) GetGroupResource() schema.GroupResource {
return api.Resource("replicationcontrollers")
}
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func (config *RCConfig) GetClient() clientset.Interface {
return config.Client
}
func (config *RCConfig) GetInternalClient() internalclientset.Interface {
return config.InternalClient
}
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func (config *RCConfig) GetScalesGetter() scaleclient.ScalesGetter {
return config.ScalesGetter
}
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func (config *RCConfig) SetClient(c clientset.Interface) {
config.Client = c
}
func (config *RCConfig) SetInternalClient(c internalclientset.Interface) {
config.InternalClient = c
}
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func (config *RCConfig) SetScalesClient(getter scaleclient.ScalesGetter) {
config.ScalesGetter = getter
}
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func (config *RCConfig) GetReplicas() int {
return config.Replicas
}
func (config *RCConfig) GetLabelValue(key string) (string, bool) {
value, found := config.Labels[key]
return value, found
}
func (config *RCConfig) create() error {
dnsDefault := v1.DNSDefault
if config.DNSPolicy == nil {
config.DNSPolicy = &dnsDefault
}
one := int64(1)
rc := &v1.ReplicationController{
ObjectMeta: metav1.ObjectMeta{
Name: config.Name,
},
Spec: v1.ReplicationControllerSpec{
Replicas: func(i int) *int32 { x := int32(i); return &x }(config.Replicas),
Selector: map[string]string{
"name": config.Name,
},
Template: &v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
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Labels: map[string]string{"name": config.Name},
Annotations: config.Annotations,
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},
Spec: v1.PodSpec{
Affinity: config.Affinity,
Containers: []v1.Container{
{
Name: config.Name,
Image: config.Image,
Command: config.Command,
Ports: []v1.ContainerPort{{ContainerPort: 80}},
ReadinessProbe: config.ReadinessProbe,
},
},
DNSPolicy: *config.DNSPolicy,
NodeSelector: config.NodeSelector,
TerminationGracePeriodSeconds: &one,
PriorityClassName: config.PriorityClassName,
},
},
},
}
if len(config.SecretNames) > 0 {
attachSecrets(rc.Spec.Template, config.SecretNames)
}
if len(config.ConfigMapNames) > 0 {
attachConfigMaps(rc.Spec.Template, config.ConfigMapNames)
}
config.applyTo(rc.Spec.Template)
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if err := CreateRCWithRetries(config.Client, config.Namespace, rc); err != nil {
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return fmt.Errorf("Error creating replication controller: %v", err)
}
config.RCConfigLog("Created replication controller with name: %v, namespace: %v, replica count: %v", rc.Name, config.Namespace, removePtr(rc.Spec.Replicas))
return nil
}
func (config *RCConfig) applyTo(template *v1.PodTemplateSpec) {
if config.Env != nil {
for k, v := range config.Env {
c := &template.Spec.Containers[0]
c.Env = append(c.Env, v1.EnvVar{Name: k, Value: v})
}
}
if config.Labels != nil {
for k, v := range config.Labels {
template.ObjectMeta.Labels[k] = v
}
}
if config.NodeSelector != nil {
template.Spec.NodeSelector = make(map[string]string)
for k, v := range config.NodeSelector {
template.Spec.NodeSelector[k] = v
}
}
if config.Ports != nil {
for k, v := range config.Ports {
c := &template.Spec.Containers[0]
c.Ports = append(c.Ports, v1.ContainerPort{Name: k, ContainerPort: int32(v)})
}
}
if config.HostPorts != nil {
for k, v := range config.HostPorts {
c := &template.Spec.Containers[0]
c.Ports = append(c.Ports, v1.ContainerPort{Name: k, ContainerPort: int32(v), HostPort: int32(v)})
}
}
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if config.CpuLimit > 0 || config.MemLimit > 0 || config.GpuLimit > 0 {
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template.Spec.Containers[0].Resources.Limits = v1.ResourceList{}
}
if config.CpuLimit > 0 {
template.Spec.Containers[0].Resources.Limits[v1.ResourceCPU] = *resource.NewMilliQuantity(config.CpuLimit, resource.DecimalSI)
}
if config.MemLimit > 0 {
template.Spec.Containers[0].Resources.Limits[v1.ResourceMemory] = *resource.NewQuantity(config.MemLimit, resource.DecimalSI)
}
if config.CpuRequest > 0 || config.MemRequest > 0 {
template.Spec.Containers[0].Resources.Requests = v1.ResourceList{}
}
if config.CpuRequest > 0 {
template.Spec.Containers[0].Resources.Requests[v1.ResourceCPU] = *resource.NewMilliQuantity(config.CpuRequest, resource.DecimalSI)
}
if config.MemRequest > 0 {
template.Spec.Containers[0].Resources.Requests[v1.ResourceMemory] = *resource.NewQuantity(config.MemRequest, resource.DecimalSI)
}
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if config.GpuLimit > 0 {
template.Spec.Containers[0].Resources.Limits["nvidia.com/gpu"] = *resource.NewQuantity(config.GpuLimit, resource.DecimalSI)
}
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if len(config.Volumes) > 0 {
template.Spec.Volumes = config.Volumes
}
if len(config.VolumeMounts) > 0 {
template.Spec.Containers[0].VolumeMounts = config.VolumeMounts
}
if config.PriorityClassName != "" {
template.Spec.PriorityClassName = config.PriorityClassName
}
}
type RCStartupStatus struct {
Expected int
Terminating int
Running int
RunningButNotReady int
Waiting int
Pending int
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Scheduled int
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Unknown int
Inactive int
FailedContainers int
Created []*v1.Pod
ContainerRestartNodes sets.String
}
func (s *RCStartupStatus) String(name string) string {
return fmt.Sprintf("%v Pods: %d out of %d created, %d running, %d pending, %d waiting, %d inactive, %d terminating, %d unknown, %d runningButNotReady ",
name, len(s.Created), s.Expected, s.Running, s.Pending, s.Waiting, s.Inactive, s.Terminating, s.Unknown, s.RunningButNotReady)
}
func ComputeRCStartupStatus(pods []*v1.Pod, expected int) RCStartupStatus {
startupStatus := RCStartupStatus{
Expected: expected,
Created: make([]*v1.Pod, 0, expected),
ContainerRestartNodes: sets.NewString(),
}
for _, p := range pods {
if p.DeletionTimestamp != nil {
startupStatus.Terminating++
continue
}
startupStatus.Created = append(startupStatus.Created, p)
if p.Status.Phase == v1.PodRunning {
ready := false
for _, c := range p.Status.Conditions {
if c.Type == v1.PodReady && c.Status == v1.ConditionTrue {
ready = true
break
}
}
if ready {
// Only count a pod is running when it is also ready.
startupStatus.Running++
} else {
startupStatus.RunningButNotReady++
}
for _, v := range FailedContainers(p) {
startupStatus.FailedContainers = startupStatus.FailedContainers + v.Restarts
startupStatus.ContainerRestartNodes.Insert(p.Spec.NodeName)
}
} else if p.Status.Phase == v1.PodPending {
if p.Spec.NodeName == "" {
startupStatus.Waiting++
} else {
startupStatus.Pending++
}
} else if p.Status.Phase == v1.PodSucceeded || p.Status.Phase == v1.PodFailed {
startupStatus.Inactive++
} else if p.Status.Phase == v1.PodUnknown {
startupStatus.Unknown++
}
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// Record count of scheduled pods (useful for computing scheduler throughput).
if p.Spec.NodeName != "" {
startupStatus.Scheduled++
}
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}
return startupStatus
}
func (config *RCConfig) start() error {
// Don't force tests to fail if they don't care about containers restarting.
var maxContainerFailures int
if config.MaxContainerFailures == nil {
maxContainerFailures = int(math.Max(1.0, float64(config.Replicas)*.01))
} else {
maxContainerFailures = *config.MaxContainerFailures
}
label := labels.SelectorFromSet(labels.Set(map[string]string{"name": config.Name}))
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ps, err := NewPodStore(config.Client, config.Namespace, label, fields.Everything())
if err != nil {
return err
}
defer ps.Stop()
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interval := config.PollInterval
if interval <= 0 {
interval = 10 * time.Second
}
timeout := config.Timeout
if timeout <= 0 {
timeout = 5 * time.Minute
}
oldPods := make([]*v1.Pod, 0)
oldRunning := 0
lastChange := time.Now()
for oldRunning != config.Replicas {
time.Sleep(interval)
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pods := ps.List()
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startupStatus := ComputeRCStartupStatus(pods, config.Replicas)
pods = startupStatus.Created
if config.CreatedPods != nil {
*config.CreatedPods = pods
}
if !config.Silent {
config.RCConfigLog(startupStatus.String(config.Name))
}
if config.PodStatusFile != nil {
fmt.Fprintf(config.PodStatusFile, "%d, running, %d, pending, %d, waiting, %d, inactive, %d, unknown, %d, runningButNotReady\n", startupStatus.Running, startupStatus.Pending, startupStatus.Waiting, startupStatus.Inactive, startupStatus.Unknown, startupStatus.RunningButNotReady)
}
if startupStatus.FailedContainers > maxContainerFailures {
if config.NodeDumpFunc != nil {
config.NodeDumpFunc(config.Client, startupStatus.ContainerRestartNodes.List(), config.RCConfigLog)
}
if config.ContainerDumpFunc != nil {
// Get the logs from the failed containers to help diagnose what caused them to fail
config.ContainerDumpFunc(config.Client, config.Namespace, config.RCConfigLog)
}
return fmt.Errorf("%d containers failed which is more than allowed %d", startupStatus.FailedContainers, maxContainerFailures)
}
if len(pods) < len(oldPods) || len(pods) > config.Replicas {
// This failure mode includes:
// kubelet is dead, so node controller deleted pods and rc creates more
// - diagnose by noting the pod diff below.
// pod is unhealthy, so replication controller creates another to take its place
// - diagnose by comparing the previous "2 Pod states" lines for inactive pods
errorStr := fmt.Sprintf("Number of reported pods for %s changed: %d vs %d", config.Name, len(pods), len(oldPods))
config.RCConfigLog("%v, pods that changed since the last iteration:", errorStr)
config.RCConfigLog(Diff(oldPods, pods).String(sets.NewString()))
return fmt.Errorf(errorStr)
}
if len(pods) > len(oldPods) || startupStatus.Running > oldRunning {
lastChange = time.Now()
}
oldPods = pods
oldRunning = startupStatus.Running
if time.Since(lastChange) > timeout {
break
}
}
if oldRunning != config.Replicas {
// List only pods from a given replication controller.
options := metav1.ListOptions{LabelSelector: label.String()}
if pods, err := config.Client.CoreV1().Pods(metav1.NamespaceAll).List(options); err == nil {
for _, pod := range pods.Items {
config.RCConfigLog("Pod %s\t%s\t%s\t%s", pod.Name, pod.Spec.NodeName, pod.Status.Phase, pod.DeletionTimestamp)
}
} else {
config.RCConfigLog("Can't list pod debug info: %v", err)
}
return fmt.Errorf("Only %d pods started out of %d", oldRunning, config.Replicas)
}
return nil
}
// Simplified version of RunRC, that does not create RC, but creates plain Pods.
// Optionally waits for pods to start running (if waitForRunning == true).
// The number of replicas must be non-zero.
func StartPods(c clientset.Interface, replicas int, namespace string, podNamePrefix string,
pod v1.Pod, waitForRunning bool, logFunc func(fmt string, args ...interface{})) error {
// no pod to start
if replicas < 1 {
panic("StartPods: number of replicas must be non-zero")
}
startPodsID := string(uuid.NewUUID()) // So that we can label and find them
for i := 0; i < replicas; i++ {
podName := fmt.Sprintf("%v-%v", podNamePrefix, i)
pod.ObjectMeta.Name = podName
pod.ObjectMeta.Labels["name"] = podName
pod.ObjectMeta.Labels["startPodsID"] = startPodsID
pod.Spec.Containers[0].Name = podName
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if err := CreatePodWithRetries(c, namespace, &pod); err != nil {
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return err
}
}
logFunc("Waiting for running...")
if waitForRunning {
label := labels.SelectorFromSet(labels.Set(map[string]string{"startPodsID": startPodsID}))
err := WaitForPodsWithLabelRunning(c, namespace, label)
if err != nil {
return fmt.Errorf("Error waiting for %d pods to be running - probably a timeout: %v", replicas, err)
}
}
return nil
}
// Wait up to 10 minutes for all matching pods to become Running and at least one
// matching pod exists.
func WaitForPodsWithLabelRunning(c clientset.Interface, ns string, label labels.Selector) error {
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return WaitForEnoughPodsWithLabelRunning(c, ns, label, -1)
}
// Wait up to 10 minutes for at least 'replicas' many pods to be Running and at least
// one matching pod exists. If 'replicas' is < 0, wait for all matching pods running.
func WaitForEnoughPodsWithLabelRunning(c clientset.Interface, ns string, label labels.Selector, replicas int) error {
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running := false
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ps, err := NewPodStore(c, ns, label, fields.Everything())
if err != nil {
return err
}
defer ps.Stop()
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for start := time.Now(); time.Since(start) < 10*time.Minute; time.Sleep(5 * time.Second) {
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pods := ps.List()
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if len(pods) == 0 {
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continue
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}
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runningPodsCount := 0
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for _, p := range pods {
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if p.Status.Phase == v1.PodRunning {
runningPodsCount++
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}
}
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if (replicas < 0 && runningPodsCount < len(pods)) || (runningPodsCount < replicas) {
continue
}
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running = true
break
}
if !running {
return fmt.Errorf("Timeout while waiting for pods with labels %q to be running", label.String())
}
return nil
}
type CountToStrategy struct {
Count int
Strategy PrepareNodeStrategy
}
type TestNodePreparer interface {
PrepareNodes() error
CleanupNodes() error
}
type PrepareNodeStrategy interface {
PreparePatch(node *v1.Node) []byte
CleanupNode(node *v1.Node) *v1.Node
}
type TrivialNodePrepareStrategy struct{}
func (*TrivialNodePrepareStrategy) PreparePatch(*v1.Node) []byte {
return []byte{}
}
func (*TrivialNodePrepareStrategy) CleanupNode(node *v1.Node) *v1.Node {
nodeCopy := *node
return &nodeCopy
}
type LabelNodePrepareStrategy struct {
labelKey string
labelValue string
}
func NewLabelNodePrepareStrategy(labelKey string, labelValue string) *LabelNodePrepareStrategy {
return &LabelNodePrepareStrategy{
labelKey: labelKey,
labelValue: labelValue,
}
}
func (s *LabelNodePrepareStrategy) PreparePatch(*v1.Node) []byte {
labelString := fmt.Sprintf("{\"%v\":\"%v\"}", s.labelKey, s.labelValue)
patch := fmt.Sprintf(`{"metadata":{"labels":%v}}`, labelString)
return []byte(patch)
}
func (s *LabelNodePrepareStrategy) CleanupNode(node *v1.Node) *v1.Node {
nodeCopy := node.DeepCopy()
if node.Labels != nil && len(node.Labels[s.labelKey]) != 0 {
delete(nodeCopy.Labels, s.labelKey)
}
return nodeCopy
}
func DoPrepareNode(client clientset.Interface, node *v1.Node, strategy PrepareNodeStrategy) error {
var err error
patch := strategy.PreparePatch(node)
if len(patch) == 0 {
return nil
}
for attempt := 0; attempt < retries; attempt++ {
if _, err = client.CoreV1().Nodes().Patch(node.Name, types.MergePatchType, []byte(patch)); err == nil {
return nil
}
if !apierrs.IsConflict(err) {
return fmt.Errorf("Error while applying patch %v to Node %v: %v", string(patch), node.Name, err)
}
time.Sleep(100 * time.Millisecond)
}
return fmt.Errorf("To many conflicts when applying patch %v to Node %v", string(patch), node.Name)
}
func DoCleanupNode(client clientset.Interface, nodeName string, strategy PrepareNodeStrategy) error {
for attempt := 0; attempt < retries; attempt++ {
node, err := client.CoreV1().Nodes().Get(nodeName, metav1.GetOptions{})
if err != nil {
return fmt.Errorf("Skipping cleanup of Node: failed to get Node %v: %v", nodeName, err)
}
updatedNode := strategy.CleanupNode(node)
if apiequality.Semantic.DeepEqual(node, updatedNode) {
return nil
}
if _, err = client.CoreV1().Nodes().Update(updatedNode); err == nil {
return nil
}
if !apierrs.IsConflict(err) {
return fmt.Errorf("Error when updating Node %v: %v", nodeName, err)
}
time.Sleep(100 * time.Millisecond)
}
return fmt.Errorf("To many conflicts when trying to cleanup Node %v", nodeName)
}
type TestPodCreateStrategy func(client clientset.Interface, namespace string, podCount int) error
type CountToPodStrategy struct {
Count int
Strategy TestPodCreateStrategy
}
type TestPodCreatorConfig map[string][]CountToPodStrategy
func NewTestPodCreatorConfig() *TestPodCreatorConfig {
config := make(TestPodCreatorConfig)
return &config
}
func (c *TestPodCreatorConfig) AddStrategy(
namespace string, podCount int, strategy TestPodCreateStrategy) {
(*c)[namespace] = append((*c)[namespace], CountToPodStrategy{Count: podCount, Strategy: strategy})
}
type TestPodCreator struct {
Client clientset.Interface
// namespace -> count -> strategy
Config *TestPodCreatorConfig
}
func NewTestPodCreator(client clientset.Interface, config *TestPodCreatorConfig) *TestPodCreator {
return &TestPodCreator{
Client: client,
Config: config,
}
}
func (c *TestPodCreator) CreatePods() error {
for ns, v := range *(c.Config) {
for _, countToStrategy := range v {
if err := countToStrategy.Strategy(c.Client, ns, countToStrategy.Count); err != nil {
return err
}
}
}
return nil
}
func MakePodSpec() v1.PodSpec {
return v1.PodSpec{
Containers: []v1.Container{{
Name: "pause",
Image: "kubernetes/pause",
Ports: []v1.ContainerPort{{ContainerPort: 80}},
Resources: v1.ResourceRequirements{
Limits: v1.ResourceList{
v1.ResourceCPU: resource.MustParse("100m"),
v1.ResourceMemory: resource.MustParse("500Mi"),
},
Requests: v1.ResourceList{
v1.ResourceCPU: resource.MustParse("100m"),
v1.ResourceMemory: resource.MustParse("500Mi"),
},
},
}},
}
}
func makeCreatePod(client clientset.Interface, namespace string, podTemplate *v1.Pod) error {
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if err := CreatePodWithRetries(client, namespace, podTemplate); err != nil {
return fmt.Errorf("Error creating pod: %v", err)
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}
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return nil
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}
func CreatePod(client clientset.Interface, namespace string, podCount int, podTemplate *v1.Pod) error {
var createError error
lock := sync.Mutex{}
createPodFunc := func(i int) {
if err := makeCreatePod(client, namespace, podTemplate); err != nil {
lock.Lock()
defer lock.Unlock()
createError = err
}
}
if podCount < 30 {
workqueue.Parallelize(podCount, podCount, createPodFunc)
} else {
workqueue.Parallelize(30, podCount, createPodFunc)
}
return createError
}
func createController(client clientset.Interface, controllerName, namespace string, podCount int, podTemplate *v1.Pod) error {
rc := &v1.ReplicationController{
ObjectMeta: metav1.ObjectMeta{
Name: controllerName,
},
Spec: v1.ReplicationControllerSpec{
Replicas: func(i int) *int32 { x := int32(i); return &x }(podCount),
Selector: map[string]string{"name": controllerName},
Template: &v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{"name": controllerName},
},
Spec: podTemplate.Spec,
},
},
}
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if err := CreateRCWithRetries(client, namespace, rc); err != nil {
return fmt.Errorf("Error creating replication controller: %v", err)
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}
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return nil
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}
func NewCustomCreatePodStrategy(podTemplate *v1.Pod) TestPodCreateStrategy {
return func(client clientset.Interface, namespace string, podCount int) error {
return CreatePod(client, namespace, podCount, podTemplate)
}
}
func NewSimpleCreatePodStrategy() TestPodCreateStrategy {
basePod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
GenerateName: "simple-pod-",
},
Spec: MakePodSpec(),
}
return NewCustomCreatePodStrategy(basePod)
}
func NewSimpleWithControllerCreatePodStrategy(controllerName string) TestPodCreateStrategy {
return func(client clientset.Interface, namespace string, podCount int) error {
basePod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
GenerateName: controllerName + "-pod-",
Labels: map[string]string{"name": controllerName},
},
Spec: MakePodSpec(),
}
if err := createController(client, controllerName, namespace, podCount, basePod); err != nil {
return err
}
return CreatePod(client, namespace, podCount, basePod)
}
}
type SecretConfig struct {
Content map[string]string
Client clientset.Interface
Name string
Namespace string
// If set this function will be used to print log lines instead of glog.
LogFunc func(fmt string, args ...interface{})
}
func (config *SecretConfig) Run() error {
secret := &v1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: config.Name,
},
StringData: map[string]string{},
}
for k, v := range config.Content {
secret.StringData[k] = v
}
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if err := CreateSecretWithRetries(config.Client, config.Namespace, secret); err != nil {
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return fmt.Errorf("Error creating secret: %v", err)
}
config.LogFunc("Created secret %v/%v", config.Namespace, config.Name)
return nil
}
func (config *SecretConfig) Stop() error {
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if err := DeleteResourceWithRetries(config.Client, api.Kind("Secret"), config.Namespace, config.Name, &metav1.DeleteOptions{}); err != nil {
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return fmt.Errorf("Error deleting secret: %v", err)
}
config.LogFunc("Deleted secret %v/%v", config.Namespace, config.Name)
return nil
}
// TODO: attach secrets using different possibilities: env vars, image pull secrets.
func attachSecrets(template *v1.PodTemplateSpec, secretNames []string) {
volumes := make([]v1.Volume, 0, len(secretNames))
mounts := make([]v1.VolumeMount, 0, len(secretNames))
for _, name := range secretNames {
volumes = append(volumes, v1.Volume{
Name: name,
VolumeSource: v1.VolumeSource{
Secret: &v1.SecretVolumeSource{
SecretName: name,
},
},
})
mounts = append(mounts, v1.VolumeMount{
Name: name,
MountPath: fmt.Sprintf("/%v", name),
})
}
template.Spec.Volumes = volumes
template.Spec.Containers[0].VolumeMounts = mounts
}
type ConfigMapConfig struct {
Content map[string]string
Client clientset.Interface
Name string
Namespace string
// If set this function will be used to print log lines instead of glog.
LogFunc func(fmt string, args ...interface{})
}
func (config *ConfigMapConfig) Run() error {
configMap := &v1.ConfigMap{
ObjectMeta: metav1.ObjectMeta{
Name: config.Name,
},
Data: map[string]string{},
}
for k, v := range config.Content {
configMap.Data[k] = v
}
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if err := CreateConfigMapWithRetries(config.Client, config.Namespace, configMap); err != nil {
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return fmt.Errorf("Error creating configmap: %v", err)
}
config.LogFunc("Created configmap %v/%v", config.Namespace, config.Name)
return nil
}
func (config *ConfigMapConfig) Stop() error {
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if err := DeleteResourceWithRetries(config.Client, api.Kind("ConfigMap"), config.Namespace, config.Name, &metav1.DeleteOptions{}); err != nil {
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return fmt.Errorf("Error deleting configmap: %v", err)
}
config.LogFunc("Deleted configmap %v/%v", config.Namespace, config.Name)
return nil
}
// TODO: attach configmaps using different possibilities: env vars.
func attachConfigMaps(template *v1.PodTemplateSpec, configMapNames []string) {
volumes := make([]v1.Volume, 0, len(configMapNames))
mounts := make([]v1.VolumeMount, 0, len(configMapNames))
for _, name := range configMapNames {
volumes = append(volumes, v1.Volume{
Name: name,
VolumeSource: v1.VolumeSource{
ConfigMap: &v1.ConfigMapVolumeSource{
LocalObjectReference: v1.LocalObjectReference{
Name: name,
},
},
},
})
mounts = append(mounts, v1.VolumeMount{
Name: name,
MountPath: fmt.Sprintf("/%v", name),
})
}
template.Spec.Volumes = volumes
template.Spec.Containers[0].VolumeMounts = mounts
}
type DaemonConfig struct {
Client clientset.Interface
Name string
Namespace string
Image string
// If set this function will be used to print log lines instead of glog.
LogFunc func(fmt string, args ...interface{})
// How long we wait for DaemonSet to become running.
Timeout time.Duration
}
func (config *DaemonConfig) Run() error {
if config.Image == "" {
config.Image = "kubernetes/pause"
}
nameLabel := map[string]string{
"name": config.Name + "-daemon",
}
daemon := &extensions.DaemonSet{
ObjectMeta: metav1.ObjectMeta{
Name: config.Name,
},
Spec: extensions.DaemonSetSpec{
Template: v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: nameLabel,
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: config.Name,
Image: config.Image,
},
},
},
},
},
}
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if err := CreateDaemonSetWithRetries(config.Client, config.Namespace, daemon); err != nil {
return fmt.Errorf("Error creating daemonset: %v", err)
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}
var nodes *v1.NodeList
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var err error
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for i := 0; i < retries; i++ {
// Wait for all daemons to be running
nodes, err = config.Client.CoreV1().Nodes().List(metav1.ListOptions{ResourceVersion: "0"})
if err == nil {
break
} else if i+1 == retries {
return fmt.Errorf("Error listing Nodes while waiting for DaemonSet %v: %v", config.Name, err)
}
}
timeout := config.Timeout
if timeout <= 0 {
timeout = 5 * time.Minute
}
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ps, err := NewPodStore(config.Client, config.Namespace, labels.SelectorFromSet(nameLabel), fields.Everything())
if err != nil {
return err
}
defer ps.Stop()
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err = wait.Poll(time.Second, timeout, func() (bool, error) {
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pods := ps.List()
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nodeHasDaemon := sets.NewString()
for _, pod := range pods {
podReady, _ := PodRunningReady(pod)
if pod.Spec.NodeName != "" && podReady {
nodeHasDaemon.Insert(pod.Spec.NodeName)
}
}
running := len(nodeHasDaemon)
config.LogFunc("Found %v/%v Daemons %v running", running, config.Name, len(nodes.Items))
return running == len(nodes.Items), nil
})
if err != nil {
config.LogFunc("Timed out while waiting for DaemonsSet %v/%v to be running.", config.Namespace, config.Name)
} else {
config.LogFunc("Created Daemon %v/%v", config.Namespace, config.Name)
}
return err
}