DockerCLI/cli/command/stack/kubernetes/conversion.go

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package kubernetes
import (
"fmt"
"sort"
"strings"
"time"
"github.com/docker/compose-on-kubernetes/api/labels"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/swarm"
appsv1beta2 "k8s.io/api/apps/v1beta2"
apiv1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
)
// Pod conversion
func podToTask(pod apiv1.Pod) swarm.Task {
var startTime time.Time
if pod.Status.StartTime != nil {
startTime = (*pod.Status.StartTime).Time
}
task := swarm.Task{
ID: string(pod.UID),
NodeID: pod.Spec.NodeName,
Spec: swarm.TaskSpec{
ContainerSpec: &swarm.ContainerSpec{
Image: getContainerImage(pod.Spec.Containers),
},
},
DesiredState: podPhaseToState(pod.Status.Phase),
Status: swarm.TaskStatus{
State: podPhaseToState(pod.Status.Phase),
Timestamp: startTime,
PortStatus: swarm.PortStatus{
Ports: getPorts(pod.Spec.Containers),
},
},
}
return task
}
func podPhaseToState(phase apiv1.PodPhase) swarm.TaskState {
switch phase {
case apiv1.PodPending:
return swarm.TaskStatePending
case apiv1.PodRunning:
return swarm.TaskStateRunning
case apiv1.PodSucceeded:
return swarm.TaskStateComplete
case apiv1.PodFailed:
return swarm.TaskStateFailed
default:
return swarm.TaskState("unknown")
}
}
func toSwarmProtocol(protocol apiv1.Protocol) swarm.PortConfigProtocol {
switch protocol {
case apiv1.ProtocolTCP:
return swarm.PortConfigProtocolTCP
case apiv1.ProtocolUDP:
return swarm.PortConfigProtocolUDP
}
return swarm.PortConfigProtocol("unknown")
}
func fetchPods(stackName string, pods corev1.PodInterface, f filters.Args) ([]apiv1.Pod, error) {
services := f.Get("service")
// for existing script compatibility, support either <servicename> or <stackname>_<servicename> format
stackNamePrefix := stackName + "_"
for _, s := range services {
if strings.HasPrefix(s, stackNamePrefix) {
services = append(services, strings.TrimPrefix(s, stackNamePrefix))
}
}
listOpts := metav1.ListOptions{LabelSelector: labels.SelectorForStack(stackName, services...)}
var result []apiv1.Pod
podsList, err := pods.List(listOpts)
if err != nil {
return nil, err
}
nodes := f.Get("node")
for _, pod := range podsList.Items {
if filterPod(pod, nodes) &&
// name filter is done client side for matching partials
f.FuzzyMatch("name", stackNamePrefix+pod.Name) {
result = append(result, pod)
}
}
return result, nil
}
func filterPod(pod apiv1.Pod, nodes []string) bool {
if len(nodes) == 0 {
return true
}
for _, name := range nodes {
if pod.Spec.NodeName == name {
return true
}
}
return false
}
func getContainerImage(containers []apiv1.Container) string {
if len(containers) == 0 {
return ""
}
return containers[0].Image
}
func getPorts(containers []apiv1.Container) []swarm.PortConfig {
if len(containers) == 0 || len(containers[0].Ports) == 0 {
return nil
}
ports := make([]swarm.PortConfig, len(containers[0].Ports))
for i, port := range containers[0].Ports {
ports[i] = swarm.PortConfig{
PublishedPort: uint32(port.HostPort),
TargetPort: uint32(port.ContainerPort),
Protocol: toSwarmProtocol(port.Protocol),
}
}
return ports
}
type tasksBySlot []swarm.Task
func (t tasksBySlot) Len() int {
return len(t)
}
func (t tasksBySlot) Swap(i, j int) {
t[i], t[j] = t[j], t[i]
}
func (t tasksBySlot) Less(i, j int) bool {
// Sort by slot.
if t[i].Slot != t[j].Slot {
return t[i].Slot < t[j].Slot
}
// If same slot, sort by most recent.
return t[j].Meta.CreatedAt.Before(t[i].CreatedAt)
}
const (
publishedServiceSuffix = "-published"
publishedOnRandomPortSuffix = "-random-ports"
)
func convertToServices(replicas *appsv1beta2.ReplicaSetList, daemons *appsv1beta2.DaemonSetList, services *apiv1.ServiceList) ([]swarm.Service, error) {
result := make([]swarm.Service, len(replicas.Items))
for i, r := range replicas.Items {
s, err := replicatedService(r, services)
if err != nil {
return nil, err
}
result[i] = *s
}
for _, d := range daemons.Items {
s, err := globalService(d, services)
if err != nil {
return nil, err
}
result = append(result, *s)
}
sort.Slice(result, func(i, j int) bool {
return result[i].ID < result[j].ID
})
return result, nil
}
func uint64ptr(i int32) *uint64 {
var o uint64
if i > 0 {
o = uint64(i)
}
return &o
}
func replicatedService(r appsv1beta2.ReplicaSet, services *apiv1.ServiceList) (*swarm.Service, error) {
s, err := convertToService(r.Labels[labels.ForServiceName], services, r.Spec.Template.Spec.Containers)
if err != nil {
return nil, err
}
s.Spec.Mode = swarm.ServiceMode{
Replicated: &swarm.ReplicatedService{Replicas: uint64ptr(r.Status.Replicas)},
}
s.ServiceStatus = &swarm.ServiceStatus{
RunningTasks: uint64(r.Status.AvailableReplicas),
DesiredTasks: uint64(r.Status.Replicas),
}
return s, nil
}
func globalService(d appsv1beta2.DaemonSet, services *apiv1.ServiceList) (*swarm.Service, error) {
s, err := convertToService(d.Labels[labels.ForServiceName], services, d.Spec.Template.Spec.Containers)
if err != nil {
return nil, err
}
s.Spec.Mode = swarm.ServiceMode{
Global: &swarm.GlobalService{},
}
s.ServiceStatus = &swarm.ServiceStatus{
RunningTasks: uint64(d.Status.NumberReady),
DesiredTasks: uint64(d.Status.DesiredNumberScheduled),
}
return s, nil
}
func convertToService(serviceName string, services *apiv1.ServiceList, containers []apiv1.Container) (*swarm.Service, error) {
serviceHeadless, err := findService(services, serviceName)
if err != nil {
return nil, err
}
stack, ok := serviceHeadless.Labels[labels.ForStackName]
if ok {
stack += "_"
}
uid := string(serviceHeadless.UID)
s := &swarm.Service{
ID: uid,
Spec: swarm.ServiceSpec{
Annotations: swarm.Annotations{
Name: stack + serviceHeadless.Name,
},
TaskTemplate: swarm.TaskSpec{
ContainerSpec: &swarm.ContainerSpec{
Image: getContainerImage(containers),
},
},
},
}
if serviceNodePort, err := findService(services, serviceName+publishedOnRandomPortSuffix); err == nil && serviceNodePort.Spec.Type == apiv1.ServiceTypeNodePort {
s.Endpoint = serviceEndpoint(serviceNodePort, swarm.PortConfigPublishModeHost)
}
if serviceLoadBalancer, err := findService(services, serviceName+publishedServiceSuffix); err == nil && serviceLoadBalancer.Spec.Type == apiv1.ServiceTypeLoadBalancer {
s.Endpoint = serviceEndpoint(serviceLoadBalancer, swarm.PortConfigPublishModeIngress)
}
return s, nil
}
func findService(services *apiv1.ServiceList, name string) (apiv1.Service, error) {
for _, s := range services.Items {
if s.Name == name {
return s, nil
}
}
return apiv1.Service{}, fmt.Errorf("could not find service '%s'", name)
}
func serviceEndpoint(service apiv1.Service, publishMode swarm.PortConfigPublishMode) swarm.Endpoint {
configs := make([]swarm.PortConfig, len(service.Spec.Ports))
for i, p := range service.Spec.Ports {
configs[i] = swarm.PortConfig{
PublishMode: publishMode,
PublishedPort: uint32(p.Port),
TargetPort: uint32(p.TargetPort.IntValue()),
Protocol: toSwarmProtocol(p.Protocol),
}
}
return swarm.Endpoint{Ports: configs}
}