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proxy.go
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proxy.go
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package controller
import (
"encoding/json"
"fmt"
"reflect"
"sort"
"time"
"github.com/caicloud/canary-release/pkg/api"
"github.com/caicloud/canary-release/pkg/chart"
"github.com/caicloud/canary-release/proxies/nginx/config"
releaselisters "github.com/caicloud/clientset/listers/release/v1alpha1"
releaseapi "github.com/caicloud/clientset/pkg/apis/release/v1alpha1"
"github.com/caicloud/clientset/util/syncqueue"
"github.com/caicloud/release-controller/pkg/kube"
"github.com/caicloud/release-controller/pkg/render"
log "github.com/zoumo/logdog"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/intstr"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/apimachinery/pkg/watch"
"k8s.io/client-go/kubernetes/scheme"
corelister "k8s.io/client-go/listers/core/v1"
"k8s.io/client-go/pkg/api/v1"
"k8s.io/client-go/tools/cache"
)
const (
forkedServiceSuffix = "-forked"
canaryServiceSuffix = "-canary"
)
var (
// canaryKind contains the schema.GroupVersionKind for this controller type.
canaryKind = releaseapi.SchemeGroupVersion.WithKind(api.CanaryReleaseKind)
releaseKind = releaseapi.SchemeGroupVersion.WithKind("Release")
)
// Proxy ...
type Proxy struct {
cfg config.Configuration
release string
canaryrelease string
namespace string
crLister releaselisters.CanaryReleaseLister
rLister releaselisters.ReleaseLister
svcLister corelister.ServiceLister
crInformer cache.Controller
rInformer cache.Controller
svcInformer cache.Controller
queue *syncqueue.SyncQueue
nginx *NginxController
codec kube.Codec
runningConfig *config.TemplateConfig
exiting bool
stopCh chan struct{}
}
// NewProxy ...
func NewProxy(cfg config.Configuration) *Proxy {
p := &Proxy{
cfg: cfg,
namespace: cfg.CanaryReleaseNamespace,
canaryrelease: cfg.CanaryReleaseName,
release: cfg.ReleaseName,
nginx: NewNginxController(),
codec: cfg.Codec,
stopCh: make(chan struct{}),
}
namespace := cfg.CanaryReleaseNamespace
var crIndexer, rIndexer, svcIndexer cache.Indexer
// construct canary release informer
crIndexer, p.crInformer = cache.NewIndexerInformer(
&cache.ListWatch{
ListFunc: func(options metav1.ListOptions) (runtime.Object, error) {
return cfg.Client.ReleaseV1alpha1().CanaryReleases(namespace).List(options)
},
WatchFunc: func(options metav1.ListOptions) (watch.Interface, error) {
return cfg.Client.ReleaseV1alpha1().CanaryReleases(namespace).Watch(options)
},
},
&releaseapi.CanaryRelease{},
0,
cache.ResourceEventHandlerFuncs{
AddFunc: p.addCanaryRelease,
UpdateFunc: p.updateCanaryRelease,
DeleteFunc: p.deleteCanaryRelease,
},
cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc},
)
// construct release informer
rIndexer, p.rInformer = cache.NewIndexerInformer(
&cache.ListWatch{
ListFunc: func(options metav1.ListOptions) (runtime.Object, error) {
return cfg.Client.ReleaseV1alpha1().Releases(namespace).List(options)
},
WatchFunc: func(options metav1.ListOptions) (watch.Interface, error) {
return cfg.Client.ReleaseV1alpha1().Releases(namespace).Watch(options)
},
},
&releaseapi.Release{},
0,
cache.ResourceEventHandlerFuncs{
UpdateFunc: p.updateRelease,
DeleteFunc: p.deleteRelease,
},
cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc},
)
// construct svc informer
svcIndexer, p.svcInformer = cache.NewIndexerInformer(
&cache.ListWatch{
ListFunc: func(options metav1.ListOptions) (runtime.Object, error) {
return cfg.Client.CoreV1().Services(namespace).List(options)
},
WatchFunc: func(options metav1.ListOptions) (watch.Interface, error) {
return cfg.Client.CoreV1().Services(namespace).Watch(options)
},
},
&v1.Service{},
0,
cache.ResourceEventHandlerFuncs{},
cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc},
)
p.queue = syncqueue.NewPassthroughSyncQueue(&releaseapi.CanaryRelease{}, p.syncCanaryRelease)
p.crLister = releaselisters.NewCanaryReleaseLister(crIndexer)
p.rLister = releaselisters.NewReleaseLister(rIndexer)
p.svcLister = corelister.NewServiceLister(svcIndexer)
return p
}
// Run ...
func (p *Proxy) Run(workers int) {
defer utilruntime.HandleCrash()
log.Info("Startting canary release controller")
defer log.Info("Shutting down canary release controller")
log.Info("Startting informer factory")
go p.crInformer.Run(p.stopCh)
go p.rInformer.Run(p.stopCh)
go p.svcInformer.Run(p.stopCh)
log.Info("Wart for all caches synced")
if !cache.WaitForCacheSync(p.stopCh,
p.crInformer.HasSynced,
p.rInformer.HasSynced,
p.svcInformer.HasSynced,
) {
log.Error("wait for cache sync timeout")
return
}
log.Info("All cahces have synced, Running Canary Release Controller ...", log.Fields{
"worker": workers,
"canary": p.canaryrelease,
"namespace": p.namespace,
"release": p.release,
})
// start workers
p.queue.Run(workers)
// start nginx
go p.nginx.Start()
<-p.stopCh
}
// Stop shutdowns the proxy
func (p *Proxy) Stop() error {
// wait proxy to clean up resource
p.waitForCleanup()
// close channel to stop informers and queue loop
close(p.stopCh)
// stop queue
p.queue.ShutDown()
// stop nginx
p.nginx.Stop()
return nil
}
// canaryFiltered checks whether needs to filter the canary release
func (p *Proxy) canaryFiltered(cr *releaseapi.CanaryRelease) bool {
// this cr has been adopted or deprecated
if cr.Status.Phase != releaseapi.CanaryTrasitionNone {
return true
}
if p.namespace == cr.Namespace && p.canaryrelease == cr.Name {
return false
}
return true
}
// releaseFiltered checks whether needs to filter the release
func (p Proxy) releaseFiltered(r *releaseapi.Release) bool {
if p.namespace == r.Namespace && p.release == r.Name {
return false
}
return true
}
func (p *Proxy) addCanaryRelease(obj interface{}) {
cr := obj.(*releaseapi.CanaryRelease)
if p.canaryFiltered(cr) {
return
}
if cr.DeletionTimestamp != nil {
// On a restart of the controller manager, it's possible for an object to
// show up in a state that is already pending deletion.
p.deleteCanaryRelease(cr)
return
}
log.Info("Adding CanaryRelaese", log.Fields{"name": cr.Name})
p.queue.Enqueue(cr)
}
func (p *Proxy) updateCanaryRelease(oldObj, curObj interface{}) {
old := oldObj.(*releaseapi.CanaryRelease)
cur := curObj.(*releaseapi.CanaryRelease)
if old.ResourceVersion == cur.ResourceVersion {
// Periodic resync will send update events for all known Objects.
// Two different versions of the same Objects will always have different RVs.
return
}
if p.canaryFiltered(cur) {
return
}
if reflect.DeepEqual(old.Spec, cur.Spec) {
return
}
log.Info("Updating CanaryRelease", log.Fields{"name": old.Name})
p.queue.EnqueueAfter(cur, 1*time.Second)
}
func (p *Proxy) deleteCanaryRelease(obj interface{}) {
cr, ok := obj.(*releaseapi.CanaryRelease)
if !ok {
tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
if !ok {
utilruntime.HandleError(fmt.Errorf("Couldn't get object from tombstone %#v", obj))
return
}
cr, ok = tombstone.Obj.(*releaseapi.CanaryRelease)
if !ok {
utilruntime.HandleError(fmt.Errorf("Tombstone contained object that is not a CanaryRelease %#v", obj))
return
}
}
if p.canaryFiltered(cr) {
return
}
log.Info("Deleting CanaryRelease", log.Fields{"cr.name": cr.Name, "cr.ns": cr.Namespace})
p.queue.Enqueue(cr)
}
func (p *Proxy) updateRelease(oldObj, curObj interface{}) {
old := oldObj.(*releaseapi.Release)
cur := curObj.(*releaseapi.Release)
if old.ResourceVersion == cur.ResourceVersion {
// Periodic resync will send update events for all known Objects.
// Two different versions of the same Objects will always have different RVs.
return
}
if p.releaseFiltered(cur) {
return
}
if reflect.DeepEqual(old.Spec, cur.Spec) {
return
}
cr, err := p.crLister.CanaryReleases(p.namespace).Get(p.canaryrelease)
if err != nil {
return
}
log.Info("Updating Release", log.Fields{"name": old.Name})
p.queue.EnqueueAfter(cr, 1*time.Second)
}
func (p *Proxy) deleteRelease(obj interface{}) {
r, ok := obj.(*releaseapi.Release)
if !ok {
tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
if !ok {
utilruntime.HandleError(fmt.Errorf("Couldn't get object from tombstone %#v", obj))
return
}
r, ok = tombstone.Obj.(*releaseapi.Release)
if !ok {
utilruntime.HandleError(fmt.Errorf("Tombstone contained object that is not a Release %#v", obj))
return
}
}
if p.releaseFiltered(r) {
return
}
cr, err := p.crLister.CanaryReleases(p.namespace).Get(p.canaryrelease)
if err != nil {
return
}
log.Info("Deleting Release", log.Fields{"cr.name": cr.Name, "cr.ns": cr.Namespace})
p.queue.Enqueue(cr)
}
// deprecate changes the canary release's transition to Deprecated
// and defers the processing to next iteration.
func (p *Proxy) deprecate(cr *releaseapi.CanaryRelease) error {
// if Transition is not None, skip it
if cr.Spec.Transition != releaseapi.CanaryTrasitionNone {
return nil
}
patch := fmt.Sprintf(`{"spec":{"transition":"%s"}}`, releaseapi.CanaryTrasitionDeprecated)
_, err := p.cfg.Client.ReleaseV1alpha1().CanaryReleases(cr.Namespace).Patch(cr.Name, types.MergePatchType, []byte(patch))
return err
}
func (p *Proxy) waitForCleanup() {
// wait 20 seconds for proxy to cleanup
wait.PollInfinite(1*time.Second, func() (bool, error) {
if p.exiting {
return true, nil
}
cr, err := p.crLister.CanaryReleases(p.namespace).Get(p.canaryrelease)
if errors.IsNotFound(err) {
// canary release has been deleted, need to wait
return true, nil
}
if err != nil {
// need retry
return false, nil
}
if cr.Spec.Transition == releaseapi.CanaryTrasitionNone {
// the transition is none, but want to stop.
// That means you don't need to wait for clean up
return true, nil
}
return false, nil
})
}
// syncCanaryRelease will sync the canary release with the given obj.
// This function is not meant to be invoked concurrently with the same obj.
func (p *Proxy) syncCanaryRelease(obj interface{}) error {
// type assertion
cr, ok := obj.(*releaseapi.CanaryRelease)
if !ok {
return fmt.Errorf("expect canary release, got:%v", obj)
}
// get obj key
key, _ := cache.DeletionHandlingMetaNamespaceKeyFunc(cr)
// record time
startTime := time.Now()
defer func() {
log.Debug("Finished syncing canary release", log.Fields{"cr": key, "usedTime": time.Since(startTime)})
}()
// find obj in local store
ncr, err := p.crLister.CanaryReleases(cr.Namespace).Get(cr.Name)
if errors.IsNotFound(err) {
log.Warn("CanaryRelease has been deleted, clean up", log.Fields{"cr": key})
return p.cleanup(cr)
}
if err != nil {
utilruntime.HandleError(fmt.Errorf("Unable to retrieve CanaryRelease %v from store: %v", key, err))
return err
}
// fresh cr
if cr.UID != ncr.UID {
// original canary release is gone
return nil
}
if ncr.DeletionTimestamp != nil {
return nil
}
// deep copy
cr, err = api.CanaryReleaseDeepCopy(ncr)
if err != nil {
return err
}
if cr.Spec.Transition != releaseapi.CanaryTrasitionNone {
log.Info("detected a adopted/deprecated Cananry Release, cleanup it", log.Fields{"cr": key})
return p.cleanup(cr)
}
// find related release
release, err := p.rLister.Releases(cr.Namespace).Get(cr.Spec.Release)
if errors.IsNotFound(err) {
// if release has been deleted, deprecate this canary release
log.Info("Release has been deleted, deprecate this CanaryRelease", log.Fields{"cr": key})
return p.deprecate(cr)
}
if err != nil {
utilruntime.HandleError(fmt.Errorf("Unable to retrieve Release %v from store: %v", key, err))
return err
}
// if release.version != canary.version, deprecate it
if release.Status.Version != cr.Spec.Version {
log.Info("Release.Version != CanaryRelease.Version deprecate this CanaryRelease", log.Fields{"release.version": release.Status.Version, "canary.version": cr.Spec.Version})
return p.deprecate(cr)
}
return p.sync(cr, release)
}
func (p *Proxy) sync(cr *releaseapi.CanaryRelease, release *releaseapi.Release) error {
p.addCondition(cr, api.NewCondition(api.ReasonUpdating, ""))
err := p._sync(cr, release)
if err != nil {
p.addCondition(cr, api.NewConditionFrom(err))
} else {
p.addCondition(cr, api.NewCondition(api.ReasonAvailable, ""))
}
return err
}
func (p *Proxy) _sync(cr *releaseapi.CanaryRelease, release *releaseapi.Release) error {
// generate origin resources from release's template and config
// generate canary resources from release's template and canary's config, with owner reference
// find origin service
// fork origin service and change it's name, add owner reference
// find canay release service and change it's name
// update nginx config
// find original service change it's target port and selector
canaryOwner := renderOwnerReference(cr)
releaseOwner := renderReleaseOwnerReference(release)
// Step 1
originObj, err := p.renderRelease(release, cr)
if err != nil {
log.Errorf("Error render release objects, err: %v", err)
return err
}
// Step 2
canaryObj, err := p.renderCanaryRelease(release, cr)
if err != nil {
log.Errorf("Error render canary objects, err: %v", err)
return err
}
// Step 3
svcCol, err := p.renderService(originObj, canaryObj, cr)
if err != nil {
log.Errorf("Error render service collections %v", err)
return err
}
// update or create canary resources add canary owner and release owner
lastManifest := render.SplitManifest(cr.Status.Manifest)
// service in canary objects have been changed
manifest, _ := p.codec.ObjectsToResources(canaryObj)
if reflect.DeepEqual(lastManifest, manifest) {
log.Info("manifest is not changed, skip this sync")
return nil
}
err = p.cfg.ReleaseClient.Update(cr.Namespace, lastManifest, manifest, kube.UpdateOptions{
OwnerReferences: []metav1.OwnerReference{
canaryOwner,
releaseOwner,
},
})
if err != nil {
log.Errorf("Error update manifest, err: %v", err)
return err
}
// update status - patch manifest
patch, _ := json.Marshal(jsonMap{
"status": jsonMap{
"manifest": render.MergeResources(manifest),
},
})
_, err = p.cfg.Client.ReleaseV1alpha1().CanaryReleases(p.namespace).Patch(p.canaryrelease, types.MergePatchType, patch)
if err != nil {
log.Errorf("Error update canary release status.manifest, %v", err)
return err
}
// Step 4
// get tcp and udp upsteam
nginxConfig := config.NewDefaultTemplateConfig()
nginxConfig.TCPBackends, nginxConfig.UDPBackends = p.getUpsteamService(svcCol)
// check if need to update
if p.runningConfig != nil && p.runningConfig.Equal(&nginxConfig) {
log.Info("template config is not changed")
return nil
}
// Step 5
// try to create forked service
for _, svccol := range svcCol {
// add owner reference to service
svccol.forked.OwnerReferences = appendOwnerIfNotExists(svccol.forked.OwnerReferences, canaryOwner)
_, err := p.cfg.Client.CoreV1().Services(p.namespace).Create(svccol.forked)
if errors.IsAlreadyExists(err) {
continue
}
if err != nil {
err = fmt.Errorf("Error create forked service, err: %v", err)
return err
}
}
// Step 6
// update nginx config
err = p.nginx.OnUpdate(nginxConfig)
if err != nil {
err = fmt.Errorf("Error reload nginx, err: %v", err)
log.Error(err)
return err
}
// Step 6
// update original service
for _, col := range svcCol {
generated := col.origin
inCluster := col.inCluster
// change service selector
generated.Spec.Selector = map[string]string{
api.LabelKeyCreatedBy: fmt.Sprintf(api.LabelValueFormatCreateby, p.namespace, p.canaryrelease),
}
// change target port
for i, port := range generated.Spec.Ports {
port.TargetPort = intstr.FromInt(int(col.protoPort2upstreamPort[protoPortKey(port.Protocol, port.Port)]))
generated.Spec.Ports[i] = port
}
if reflect.DeepEqual(generated.Spec.Ports, inCluster.Spec.Ports) &&
reflect.DeepEqual(generated.Spec.Selector, inCluster.Spec.Selector) {
continue
}
// add in cluster owner references (release controller) and generated owner referecens (canary release controller)
inCluster.OwnerReferences = appendOwnerIfNotExists(inCluster.OwnerReferences, canaryOwner)
inCluster.Spec.Ports = generated.Spec.Ports
inCluster.Spec.Selector = generated.Spec.Selector
_, err := p.cfg.Client.CoreV1().Services(p.namespace).Update(inCluster)
if err != nil {
log.Errorf("Error update original service %v, err: %v", generated.Name, err)
return err
}
}
// set running config
p.runningConfig = &nginxConfig
return nil
}
func (p *Proxy) getUpsteamService(svcCol []*serviceCollection) ([]api.L4Service, []api.L4Service) {
getWeight := func(weight *int32) (int32, int32) {
if weight == nil {
return 0, 100
}
canaryWeight := *weight
if *weight >= 100 {
canaryWeight = 100
}
if *weight <= 0 {
canaryWeight = 0
}
return canaryWeight, 100 - canaryWeight
}
upsteamPort := int32(8080)
// sort servce by name
cols := sortByName(svcCol)
sort.Sort(cols)
var tcpService, udpService []api.L4Service
for _, col := range cols {
// sort ports
ports := sortByPort(col.service.Ports)
sort.Sort(ports)
if col.protoPort2upstreamPort == nil {
col.protoPort2upstreamPort = make(map[string]int32)
}
for _, port := range ports {
// HTTP HTTPS TCP are considered as TCP protocol
protocol := v1.ProtocolTCP
if port.Protocol == releaseapi.ProtocolUDP {
protocol = v1.ProtocolUDP
}
canaryWeight, originWeight := getWeight(port.Config.Weight)
upsteam := api.L4Service{
Port: upsteamPort,
Backend: api.L4Backend{
Port: port.Port,
Name: col.name,
Namespace: p.namespace,
Protocol: protocol,
},
Endpoints: []api.Endpoint{
{
Address: col.forked.Name,
Port: port.Port,
Weight: originWeight,
},
{
Address: col.canary.Name,
Port: port.Port,
Weight: canaryWeight,
},
},
}
if protocol == v1.ProtocolTCP {
tcpService = append(tcpService, upsteam)
} else {
udpService = append(udpService, upsteam)
}
col.protoPort2upstreamPort[protoPortKey(protocol, port.Port)] = upsteamPort
upsteamPort++
}
}
return tcpService, udpService
}
// render all needed services
func (p *Proxy) renderService(originObj, canaryObj []runtime.Object, cr *releaseapi.CanaryRelease) ([]*serviceCollection, error) {
services := make([]*serviceCollection, 0, len(cr.Spec.Service))
for _, svc := range cr.Spec.Service {
var err error
// add canary service config
s := &serviceCollection{
service: svc,
}
// get origin generated object
s.origin, err = getService(originObj, svc.Service)
if err != nil {
log.Errorf("Error get service %v from origin objects, err: %v", svc.Service, err)
return nil, err
}
// fork origin service
// change it's name and add owner reference
copy := *s.origin
copy.Name += forkedServiceSuffix
s.forked = ©
// get in-cluster service
s.inCluster, err = p.svcLister.Services(p.namespace).Get(svc.Service)
if err != nil {
log.Errorf("Error get service %v from lister, err: %v", svc.Service, err)
return nil, err
}
// get canary service
s.canary, err = getService(canaryObj, svc.Service)
if err != nil {
log.Errorf("Error get service %v from canary objects, err: %v", svc.Service, err)
return nil, err
}
// change canary service name
s.canary.Name += canaryServiceSuffix
services = append(services, s)
}
return services, nil
}
func (p *Proxy) renderRelease(release *releaseapi.Release, cr *releaseapi.CanaryRelease) ([]runtime.Object, error) {
carry, err := render.CarrierForManifest(release.Status.Manifest)
if err != nil {
return nil, err
}
// get canary release resources
ress, err := carry.ResourcesOf(cr.Spec.Path)
if err != nil {
return nil, fmt.Errorf("Error find resources from carrier with path %v", err)
}
// render to objects
objs, err := p.codec.ResourcesToObjects(ress)
if err != nil {
return nil, err
}
return objs, nil
}
// render objects from release's template and canary config
func (p *Proxy) renderCanaryRelease(release *releaseapi.Release, cr *releaseapi.CanaryRelease) ([]runtime.Object, error) {
canaryConfig, err := chart.ReplaceConfig(release.Spec.Config, cr.Spec.Path, cr.Spec.Config)
if err != nil {
return nil, err
}
r := render.NewRender()
carry, err := r.Render(&render.RenderOptions{
Namespace: release.Namespace,
Release: release.Name,
Version: release.Status.Version,
Template: release.Spec.Template,
Config: canaryConfig,
})
if err != nil {
return nil, err
}
// get canary release resources
// the path to resource has been changed
ress, err := carry.ResourcesOf(cr.Spec.Path)
if err != nil {
return nil, fmt.Errorf("Error find resources from carrier with path %v", err)
}
// render to objects
objs, err := p.codec.ResourcesToObjects(ress)
if err != nil {
return nil, err
}
return objs, nil
}
func (p *Proxy) cleanup(cr *releaseapi.CanaryRelease) error {
err := p._cleanup(cr)
if err != nil {
p.addErrorCondition(cr, err)
} else {
p.addCondition(cr, api.NewCondition(string(cr.Spec.Transition), ""))
}
return err
}
func (p *Proxy) _cleanup(cr *releaseapi.CanaryRelease) error {
if cr.Status.Phase != releaseapi.CanaryTrasitionNone {
return nil
}
canaryOwner := renderOwnerReference(cr)
rClient := p.cfg.Client.ReleaseV1alpha1().Releases(cr.Namespace)
crClient := p.cfg.Client.ReleaseV1alpha1().CanaryReleases(cr.Namespace)
svcClient := p.cfg.Client.CoreV1().Services(cr.Namespace)
// get service from lister with suffix
getSvcs := func(suffix string) ([]*v1.Service, error) {
var svcs []*v1.Service
for _, svc := range cr.Spec.Service {
name := svc.Service + suffix
original, err := p.svcLister.Services(p.namespace).Get(name)
if errors.IsNotFound(err) {
continue
}
if err != nil {
return nil, err
}
svcs = append(svcs, original)
}
return svcs, nil
}
// delete services
deleteSvcs := func(svcs []*v1.Service) {
background := metav1.DeletePropagationBackground
for _, svc := range svcs {
err := svcClient.Delete(svc.Name, &metav1.DeleteOptions{
PropagationPolicy: &background,
})
if errors.IsNotFound(err) {
log.Warnf("delete service %v not found", svc.Name)
}
}
}
// revocer service relate origin and target services whith name suffix
// use all fields in target service but original name and owner references
// to recover the origin service
recoverSvcs := func(origin, target []*v1.Service, suffix string, deleteOwner bool) {
for _, o := range origin {
var fs *v1.Service
for _, f := range target {
if f.Name == o.Name+suffix {
fs = f
break
}
}
if fs == nil {
continue
}
// deep copy target service
oc, _ := scheme.Scheme.DeepCopy(o)
o = oc.(*v1.Service)
if deleteOwner {
o.OwnerReferences = deleteOwnerIfExists(o.OwnerReferences, canaryOwner)
}
o.Spec.Ports = fs.Spec.Ports
o.Spec.Selector = fs.Spec.Selector
svcClient.Update(o)
}
}
// if release has been deleted, original service will be empty
originalService, err := getSvcs("")
if err != nil {
return err
}
forkedService, err := getSvcs(forkedServiceSuffix)
if err != nil {
return err
}
canaryService, err := getSvcs(canaryServiceSuffix)
if err != nil {
return err
}
if cr.Spec.Transition == releaseapi.CanaryTrasitionAdopted {
// apply change to release
// find related release
release, err := p.rLister.Releases(cr.Namespace).Get(cr.Spec.Release)
if errors.IsNotFound(err) {
// if release has been deleted, deprecate this canary release
log.Info("Release has been deleted, deprecate this CanaryRelease", log.Fields{"cr": cr.Name})
return p.deprecate(cr)
}
if err != nil {
utilruntime.HandleError(fmt.Errorf("Unable to retrieve Release %v from store: %v", cr.Spec.Release, err))
return err
}
if cr.Spec.Version != release.Status.Version {
return p.deprecate(cr)
}
// use canary service cover original
// origin service has two owner now
recoverSvcs(originalService, canaryService, canaryServiceSuffix, false)
// generate new config
canaryConfig, err := chart.ReplaceConfig(release.Spec.Config, cr.Spec.Path, cr.Spec.Config)
if err != nil {
return err
}
// update release
release.Spec.Config = canaryConfig
_, err = rClient.Update(release)
if err != nil {
return err
}
// wait for release updated
wait.PollImmediate(1*time.Second, 10*time.Second, func() (bool, error) {
r, err := p.cfg.Client.ReleaseV1alpha1().Releases(release.Namespace).Get(release.Name, metav1.GetOptions{})
if err != nil {
return false, nil
}
if r.Status.Version > release.Status.Version {
return true, nil
}
return false, nil
})
// change owner reference to Release for all manifest
owner := renderReleaseOwnerReference(release)
ownerPatch := []byte(fmt.Sprintf(`{"metadata":{"ownerReferences":[{"apiVersion":"%s","kind":"%s","name":"%s","uid":"%s"}]}}`, owner.APIVersion, owner.Kind, owner.Name, owner.UID))
objs, accessors, err := p.codec.AccessorsForResources(render.SplitManifest(cr.Status.Manifest))
for i, obj := range objs {
accessor := accessors[i]
gvk := obj.GetObjectKind().GroupVersionKind()
if gvk.Kind == "Service" {
// skip service to avoid unexpected deletion
// if you set the owner to release, release controller will
// take over the resources, it find that the resources don't
// match the spec, so controller delete the redundant resource
// we expect to delete these services manually.
continue
}
client, _ := p.cfg.ReleaseClientPool.ClientFor(gvk, p.namespace)
_, err := client.Patch(accessor.GetName(), types.MergePatchType, ownerPatch)
if err != nil {
return err
}
}
// reset owner
for _, svc := range originalService {
// reset the owner reference to let release controller take over these services
svcClient.Patch(svc.Name, types.MergePatchType, ownerPatch)
}
// delete forkedServices
deleteSvcs(forkedService)
// delete canaryServices
deleteSvcs(canaryService)
} else if cr.Spec.Transition == releaseapi.CanaryTrasitionDeprecated {
// maybe release has been deleted, the originalService will be empty
// use forked service cover original
recoverSvcs(originalService, forkedService, forkedServiceSuffix, true)
// delete manifest
err := p.cfg.ReleaseClient.Delete(p.namespace, render.SplitManifest(cr.Status.Manifest), kube.DeleteOptions{})
if err != nil {
log.Errorf("Error delete manifest from canary release, %v", err)
}
// delete forked service
deleteSvcs(forkedService)
}
patch := fmt.Sprintf(`{"status":{"manifest":null,"phase":"%s"}}`, cr.Spec.Transition)
crClient.Patch(cr.Name, types.MergePatchType, []byte(patch))
p.runningConfig = nil
p.exiting = true
return nil
}