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operator.go
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operator.go
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package operator
import (
"encoding/base64"
"encoding/json"
"fmt"
"io/ioutil"
"time"
"github.com/ghodss/yaml"
"github.com/golang/glog"
configclientset "github.com/openshift/client-go/config/clientset/versioned"
"k8s.io/api/core/v1"
apiextclientset "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
apiextinformersv1beta1 "k8s.io/apiextensions-apiserver/pkg/client/informers/externalversions/apiextensions/v1beta1"
apiextlistersv1beta1 "k8s.io/apiextensions-apiserver/pkg/client/listers/apiextensions/v1beta1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
appsinformersv1 "k8s.io/client-go/informers/apps/v1"
coreinformersv1 "k8s.io/client-go/informers/core/v1"
rbacinformersv1 "k8s.io/client-go/informers/rbac/v1"
"k8s.io/client-go/kubernetes"
coreclientsetv1 "k8s.io/client-go/kubernetes/typed/core/v1"
appslisterv1 "k8s.io/client-go/listers/apps/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
configv1 "github.com/openshift/api/config/v1"
configinformersv1 "github.com/openshift/client-go/config/informers/externalversions/config/v1"
configlistersv1 "github.com/openshift/client-go/config/listers/config/v1"
installertypes "github.com/openshift/installer/pkg/types"
mcfgv1 "github.com/openshift/machine-config-operator/pkg/apis/machineconfiguration.openshift.io/v1"
templatectrl "github.com/openshift/machine-config-operator/pkg/controller/template"
mcfgclientset "github.com/openshift/machine-config-operator/pkg/generated/clientset/versioned"
"github.com/openshift/machine-config-operator/pkg/generated/clientset/versioned/scheme"
mcfginformersv1 "github.com/openshift/machine-config-operator/pkg/generated/informers/externalversions/machineconfiguration.openshift.io/v1"
mcfglistersv1 "github.com/openshift/machine-config-operator/pkg/generated/listers/machineconfiguration.openshift.io/v1"
"github.com/openshift/machine-config-operator/pkg/version"
)
const (
// maxRetries is the number of times a machineconfig pool will be retried before it is dropped out of the queue.
// With the current rate-limiter in use (5ms*2^(maxRetries-1)) the following numbers represent the times
// a machineconfig pool is going to be requeued:
//
// 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms, 640ms, 1.3s, 2.6s, 5.1s, 10.2s, 20.4s, 41s, 82s
maxRetries = 15
// osImageConfigMapName is the name of our configmap for the osImageURL
osImageConfigMapName = "machine-config-osimageurl"
)
// Operator defines machince config operator.
type Operator struct {
namespace, name string
inClusterBringup bool
imagesFile string
vStore *versionStore
client mcfgclientset.Interface
kubeClient kubernetes.Interface
apiExtClient apiextclientset.Interface
configClient configclientset.Interface
eventRecorder record.EventRecorder
syncHandler func(ic string) error
crdLister apiextlistersv1beta1.CustomResourceDefinitionLister
mcoconfigLister mcfglistersv1.MCOConfigLister
mcpLister mcfglistersv1.MachineConfigPoolLister
ccLister mcfglistersv1.ControllerConfigLister
mcLister mcfglistersv1.MachineConfigLister
deployLister appslisterv1.DeploymentLister
daemonsetLister appslisterv1.DaemonSetLister
infraLister configlistersv1.InfrastructureLister
networkLister configlistersv1.NetworkLister
crdListerSynced cache.InformerSynced
mcoconfigListerSynced cache.InformerSynced
deployListerSynced cache.InformerSynced
daemonsetListerSynced cache.InformerSynced
infraListerSynced cache.InformerSynced
networkListerSynced cache.InformerSynced
// queue only ever has one item, but it has nice error handling backoff/retry semantics
queue workqueue.RateLimitingInterface
}
// New returns a new machine config operator.
func New(
namespace, name string,
imagesFile string,
mcoconfigInformer mcfginformersv1.MCOConfigInformer,
mcpInformer mcfginformersv1.MachineConfigPoolInformer,
ccInformer mcfginformersv1.ControllerConfigInformer,
mcInformer mcfginformersv1.MachineConfigInformer,
controllerConfigInformer mcfginformersv1.ControllerConfigInformer,
serviceAccountInfomer coreinformersv1.ServiceAccountInformer,
crdInformer apiextinformersv1beta1.CustomResourceDefinitionInformer,
deployInformer appsinformersv1.DeploymentInformer,
daemonsetInformer appsinformersv1.DaemonSetInformer,
clusterRoleInformer rbacinformersv1.ClusterRoleInformer,
clusterRoleBindingInformer rbacinformersv1.ClusterRoleBindingInformer,
cmInformer coreinformersv1.ConfigMapInformer,
infraInformer configinformersv1.InfrastructureInformer,
networkInformer configinformersv1.NetworkInformer,
client mcfgclientset.Interface,
kubeClient kubernetes.Interface,
apiExtClient apiextclientset.Interface,
configClient configclientset.Interface,
) *Operator {
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(glog.Infof)
eventBroadcaster.StartRecordingToSink(&coreclientsetv1.EventSinkImpl{Interface: kubeClient.CoreV1().Events("")})
optr := &Operator{
namespace: namespace,
name: name,
imagesFile: imagesFile,
vStore: newVersionStore(),
client: client,
kubeClient: kubeClient,
apiExtClient: apiExtClient,
configClient: configClient,
eventRecorder: eventBroadcaster.NewRecorder(scheme.Scheme, v1.EventSource{Component: "machineconfigoperator"}),
queue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "machineconfigoperator"),
}
// set operator version in version store
optr.vStore.Set("operator", version.Version.String())
mcoconfigInformer.Informer().AddEventHandler(optr.eventHandler())
controllerConfigInformer.Informer().AddEventHandler(optr.eventHandler())
serviceAccountInfomer.Informer().AddEventHandler(optr.eventHandler())
crdInformer.Informer().AddEventHandler(optr.eventHandler())
deployInformer.Informer().AddEventHandler(optr.eventHandler())
daemonsetInformer.Informer().AddEventHandler(optr.eventHandler())
clusterRoleInformer.Informer().AddEventHandler(optr.eventHandler())
clusterRoleBindingInformer.Informer().AddEventHandler(optr.eventHandler())
cmInformer.Informer().AddEventHandler(optr.eventHandler())
infraInformer.Informer().AddEventHandler(optr.eventHandler())
networkInformer.Informer().AddEventHandler(optr.eventHandler())
optr.syncHandler = optr.sync
optr.crdLister = crdInformer.Lister()
optr.crdListerSynced = crdInformer.Informer().HasSynced
optr.mcoconfigLister = mcoconfigInformer.Lister()
optr.mcoconfigListerSynced = mcoconfigInformer.Informer().HasSynced
optr.mcpLister = mcpInformer.Lister()
optr.ccLister = ccInformer.Lister()
optr.mcLister = mcInformer.Lister()
optr.deployLister = deployInformer.Lister()
optr.deployListerSynced = deployInformer.Informer().HasSynced
optr.daemonsetLister = daemonsetInformer.Lister()
optr.daemonsetListerSynced = daemonsetInformer.Informer().HasSynced
optr.infraLister = infraInformer.Lister()
optr.infraListerSynced = infraInformer.Informer().HasSynced
optr.networkLister = networkInformer.Lister()
optr.networkListerSynced = networkInformer.Informer().HasSynced
return optr
}
// Run runs the machine config operator.
func (optr *Operator) Run(workers int, stopCh <-chan struct{}) {
defer utilruntime.HandleCrash()
defer optr.queue.ShutDown()
glog.Info("Starting MachineConfigOperator")
defer glog.Info("Shutting down MachineConfigOperator")
apiClient := optr.apiExtClient.ApiextensionsV1beta1()
_, err := apiClient.CustomResourceDefinitions().Get("machineconfigpools.machineconfiguration.openshift.io", metav1.GetOptions{})
if err != nil {
if apierrors.IsNotFound(err) {
glog.Infof("Couldn't find machineconfigpool CRD, in cluster bringup mode")
optr.inClusterBringup = true
} else {
glog.Errorf("While checking for cluster bringup: %v", err)
}
}
if !cache.WaitForCacheSync(stopCh,
optr.crdListerSynced,
optr.mcoconfigListerSynced,
optr.deployListerSynced,
optr.daemonsetListerSynced,
optr.infraListerSynced,
optr.networkListerSynced) {
glog.Error("failed to sync caches")
return
}
for i := 0; i < workers; i++ {
go wait.Until(optr.worker, time.Second, stopCh)
}
<-stopCh
}
func (optr *Operator) eventHandler() cache.ResourceEventHandler {
workQueueKey := fmt.Sprintf("%s/%s", optr.namespace, optr.name)
return cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) { optr.queue.Add(workQueueKey) },
UpdateFunc: func(old, new interface{}) { optr.queue.Add(workQueueKey) },
DeleteFunc: func(obj interface{}) { optr.queue.Add(workQueueKey) },
}
}
func (optr *Operator) worker() {
for optr.processNextWorkItem() {
}
}
func (optr *Operator) processNextWorkItem() bool {
key, quit := optr.queue.Get()
if quit {
return false
}
defer optr.queue.Done(key)
err := optr.syncHandler(key.(string))
optr.handleErr(err, key)
return true
}
func (optr *Operator) handleErr(err error, key interface{}) {
if err == nil {
optr.queue.Forget(key)
return
}
optr.syncFailingStatus(err)
if optr.queue.NumRequeues(key) < maxRetries {
glog.V(2).Infof("Error syncing operator %v: %v", key, err)
optr.queue.AddRateLimited(key)
return
}
utilruntime.HandleError(err)
glog.V(2).Infof("Dropping operator %q out of the queue: %v", key, err)
optr.queue.Forget(key)
}
func (optr *Operator) sync(key string) error {
startTime := time.Now()
glog.V(4).Infof("Started syncing operator %q (%v)", key, startTime)
defer func() {
glog.V(4).Infof("Finished syncing operator %q (%v)", key, time.Since(startTime))
}()
if err := optr.syncCustomResourceDefinitions(); err != nil {
return err
}
namespace, _, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
return err
}
// sync up the images used by operands.
imgsRaw, err := ioutil.ReadFile(optr.imagesFile)
if err != nil {
return err
}
imgs := Images{}
if err := json.Unmarshal(imgsRaw, &imgs); err != nil {
return err
}
// sync up CAs
etcdCA, err := optr.getCAsFromConfigMap("kube-system", "etcd-serving-ca", "ca-bundle.crt")
if err != nil {
return err
}
rootCA, err := optr.getCAsFromConfigMap("kube-system", "root-ca", "ca.crt")
if err != nil {
return err
}
kubeCA, err := optr.getCAsFromConfigMap("openshift-config", "initial-client-ca", "ca-bundle.crt")
if err != nil {
return err
}
bundle := make([]byte, 0)
bundle = append(bundle, rootCA...)
bundle = append(bundle, kubeCA...)
// sync up os image url
// TODO: this should probably be part of the imgs
osimageurl, err := optr.getOsImageURL(namespace)
if err != nil {
return err
}
imgs.MachineOSContent = osimageurl
// sync up the ControllerConfigSpec
ic, err := optr.getInstallConfig()
if err != nil {
return err
}
infra, network, err := optr.getGlobalConfig()
if err != nil {
return err
}
spec, err := createDiscoveredControllerConfigSpec(infra, network)
if err != nil {
return err
}
spec.EtcdCAData = etcdCA
spec.RootCAData = bundle
spec.PullSecret = &v1.ObjectReference{Namespace: "kube-system", Name: "coreos-pull-secret"}
spec.SSHKey = ic.SSHKey
spec.OSImageURL = imgs.MachineOSContent
spec.Images = map[string]string{
templatectrl.EtcdImageKey: imgs.Etcd,
templatectrl.SetupEtcdEnvKey: imgs.SetupEtcdEnv,
}
// create renderConfig
rc := getRenderConfig(namespace, spec, imgs, infra.Status.APIServerURL)
// syncFuncs is the list of sync functions that are executed in order.
// any error marks sync as failure but continues to next syncFunc
var syncFuncs = []syncFunc{
{"pools", optr.syncMachineConfigPools},
{"mcc", optr.syncMachineConfigController},
{"mcs", optr.syncMachineConfigServer},
{"mcd", optr.syncMachineConfigDaemon},
{"required-pools", optr.syncRequiredMachineConfigPools},
}
return optr.syncAll(rc, syncFuncs)
}
func (optr *Operator) getOsImageURL(namespace string) (string, error) {
cm, err := optr.kubeClient.CoreV1().ConfigMaps(namespace).Get(osImageConfigMapName, metav1.GetOptions{})
if err != nil {
return "", err
}
return cm.Data["osImageURL"], nil
}
func (optr *Operator) getCAsFromConfigMap(namespace, name, key string) ([]byte, error) {
cm, err := optr.kubeClient.CoreV1().ConfigMaps(namespace).Get(name, metav1.GetOptions{})
if err != nil {
return nil, err
}
if bd, bdok := cm.BinaryData[key]; bdok {
return bd, nil
} else if d, dok := cm.Data[key]; dok {
raw, err := base64.StdEncoding.DecodeString(d)
if err != nil {
// this is actually the result of a bad assumption. configmap values are not encoded.
// After the installer pull merges, this entire attempt to decode can go away.
return []byte(d), nil
}
return raw, nil
} else {
return nil, fmt.Errorf("%s not found in %s/%s", key, namespace, name)
}
}
func (optr *Operator) getInstallConfig() (installertypes.InstallConfig, error) {
var (
clusterConfigNamespace = "kube-system"
clusterConfigName = "cluster-config-v1"
)
clusterConfig, err := optr.kubeClient.CoreV1().ConfigMaps(clusterConfigNamespace).Get(clusterConfigName, metav1.GetOptions{})
if err != nil {
return installertypes.InstallConfig{}, err
}
return icFromClusterConfig(clusterConfig)
}
// getGlobalConfig gets global configuration for the cluster, namely, the Infrastructure and Network types.
// Each type of global configuration is named `cluster` for easy discovery in the cluster.
func (optr *Operator) getGlobalConfig() (*configv1.Infrastructure, *configv1.Network, error) {
infra, err := optr.infraLister.Get("cluster")
if err != nil {
return nil, nil, err
}
network, err := optr.networkLister.Get("cluster")
if err != nil {
return nil, nil, err
}
return infra, network, nil
}
func icFromClusterConfig(cm *v1.ConfigMap) (installertypes.InstallConfig, error) {
var (
icKey = "install-config"
ic installertypes.InstallConfig
)
icData, ok := cm.Data[icKey]
if !ok {
return ic, fmt.Errorf("%s doesn't exist", icKey)
}
if err := yaml.Unmarshal([]byte(icData), &ic); err != nil {
return ic, err
}
return ic, nil
}
func getRenderConfig(tnamespace string, ccSpec *mcfgv1.ControllerConfigSpec, imgs Images, apiServerURL string) renderConfig {
return renderConfig{
TargetNamespace: tnamespace,
Version: version.Raw,
ControllerConfig: *ccSpec,
Images: imgs,
APIServerURL: apiServerURL,
}
}