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List and watch pods to reduce the http requests to apiserver #132

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15 changes: 15 additions & 0 deletions pkg/galaxy/galaxy.go
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Original file line number Diff line number Diff line change
Expand Up @@ -22,11 +22,16 @@ import (
"io/ioutil"
"time"

v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes"
corev1Lister "k8s.io/client-go/listers/core/v1"
"k8s.io/client-go/tools/clientcmd"
glog "k8s.io/klog"
"tkestack.io/galaxy/pkg/api/docker"
"tkestack.io/galaxy/pkg/api/k8s"
"tkestack.io/galaxy/pkg/galaxy/options"
"tkestack.io/galaxy/pkg/gc"
"tkestack.io/galaxy/pkg/network/kernel"
Expand All @@ -44,6 +49,8 @@ type Galaxy struct {
pmhandler *portmapping.PortMappingHandler
client kubernetes.Interface
pm *policy.PolicyManager
factory informers.SharedInformerFactory
podLister corev1Lister.PodLister
}

type JsonConf struct {
Expand Down Expand Up @@ -163,6 +170,14 @@ func (g *Galaxy) initk8sClient() {
glog.Fatalf("Can not generate client from config: error(%v)", err)
}
glog.Infof("apiserver address %s", clientConfig.Host)
g.factory = informers.NewSharedInformerFactoryWithOptions(g.client, time.Minute,
informers.WithTweakListOptions(
func(listOptions *v1.ListOptions) {
listOptions.FieldSelector = fields.OneTermEqualSelector("spec.nodeName", k8s.GetHostname()).String()
}))
g.podLister = g.factory.Core().V1().Pods().Lister()
g.factory.Start(g.quitChan)
g.factory.WaitForCacheSync(g.quitChan)
}

func (g *Galaxy) SetClient(cli kubernetes.Interface) {
Expand Down
29 changes: 4 additions & 25 deletions pkg/galaxy/server.go
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Original file line number Diff line number Diff line change
Expand Up @@ -31,9 +31,8 @@ import (
t020 "github.com/containernetworking/cni/pkg/types/020"
"github.com/emicklei/go-restful"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/util/wait"
glog "k8s.io/klog"
"tkestack.io/galaxy/pkg/api/cniutil"
Expand Down Expand Up @@ -285,14 +284,12 @@ func parseExtendedCNIArgs(pod *corev1.Pod) (map[string]json.RawMessage, error) {

func (g *Galaxy) setupIPtables() error {
// filter all running pods on node
pods, err := g.client.CoreV1().Pods(v1.NamespaceAll).List(v1.ListOptions{
FieldSelector: fields.OneTermEqualSelector("spec.nodeName", k8s.GetHostname()).String()})
pods, err := g.podLister.List(labels.Everything())
if err != nil {
return fmt.Errorf("failed to get pods on node: %v", err)
}
var allPorts []k8s.Port
for i := range pods.Items {
pod := &pods.Items[i]
for _, pod := range pods {
if len(pod.Status.PodIP) == 0 || pod.Spec.HostNetwork {
continue
}
Expand Down Expand Up @@ -409,25 +406,7 @@ func (g *Galaxy) cleanIPtables(containerID string) error {
}

func (g *Galaxy) getPod(name, namespace string) (*corev1.Pod, error) {
var pod *corev1.Pod
printOnce := false
if err := wait.PollImmediate(time.Millisecond*500, 5*time.Second, func() (done bool, err error) {
pod, err = g.client.CoreV1().Pods(namespace).Get(name, v1.GetOptions{})
if err != nil {
if errors.IsNotFound(err) {
if printOnce == false {
printOnce = true
glog.Warningf("can't find pod %s_%s, retring", name, namespace)
}
return false, nil
}
return false, err
}
return true, nil
}); err != nil {
return nil, fmt.Errorf("failed to get pod %s_%s: %v", name, namespace, err)
}
return pod, nil
return g.podLister.Pods(namespace).Get(name)
}

func convertResult(result types.Result) (*t020.Result, error) {
Expand Down