forked from vladimirvivien/ktop
/
client_controller.go
164 lines (136 loc) · 5.27 KB
/
client_controller.go
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package k8s
import (
"context"
"errors"
"time"
"github.com/pjy0381/ktop/views/model"
"k8s.io/client-go/informers"
appsV1Informers "k8s.io/client-go/informers/apps/v1"
batchV1Informers "k8s.io/client-go/informers/batch/v1"
coreV1Informers "k8s.io/client-go/informers/core/v1"
"k8s.io/client-go/tools/cache"
)
type RefreshNodesFunc func(ctx context.Context, items []model.NodeModel) error
type RefreshPodsFunc func(ctx context.Context, items []model.PodModel) error
type RefreshSummaryFunc func(ctx context.Context, items model.ClusterSummary) error
type Controller struct {
client *Client
nodeMetricsInformer *NodeMetricsInformer
podMetricsInformer *PodMetricsInformer
namespaceInformer coreV1Informers.NamespaceInformer
nodeInformer coreV1Informers.NodeInformer
podInformer coreV1Informers.PodInformer
pvInformer coreV1Informers.PersistentVolumeInformer
pvcInformer coreV1Informers.PersistentVolumeClaimInformer
jobInformer batchV1Informers.JobInformer
cronJobInformer batchV1Informers.CronJobInformer
deploymentInformer appsV1Informers.DeploymentInformer
daemonSetInformer appsV1Informers.DaemonSetInformer
replicaSetInformer appsV1Informers.ReplicaSetInformer
statefulSetInformer appsV1Informers.StatefulSetInformer
nodeRefreshFunc RefreshNodesFunc
podRefreshFunc RefreshPodsFunc
summaryRefreshFunc RefreshSummaryFunc
}
func newController(client *Client) *Controller {
ctrl := &Controller{client: client}
return ctrl
}
func (c *Controller) SetNodeRefreshFunc(fn RefreshNodesFunc) *Controller {
c.nodeRefreshFunc = fn
return c
}
func (c *Controller) SetPodRefreshFunc(fn RefreshPodsFunc) *Controller {
c.podRefreshFunc = fn
return c
}
func (c *Controller) SetClusterSummaryRefreshFunc(fn RefreshSummaryFunc) *Controller {
c.summaryRefreshFunc = fn
return c
}
func (c *Controller) Start(ctx context.Context, resync time.Duration) error {
if ctx == nil {
return errors.New("context cannot be nil")
}
// initialize
if err := c.client.AssertMetricsAvailable(); err == nil {
c.nodeMetricsInformer = NewNodeMetricsInformer(c.client.metricsClient, resync)
nodeMetricsInformerHasSynced := c.nodeMetricsInformer.Informer().HasSynced
c.podMetricsInformer = NewPodMetricsInformer(c.client.metricsClient, resync, c.client.namespace)
podMetricsInformerHasSynced := c.podMetricsInformer.Informer().HasSynced
go c.nodeMetricsInformer.Informer().Run(ctx.Done())
go c.podMetricsInformer.Informer().Run(ctx.Done())
if ok := cache.WaitForCacheSync(ctx.Done(), nodeMetricsInformerHasSynced, podMetricsInformerHasSynced); !ok {
panic("metrics resources failed to sync [nodes, pods, containers]")
}
}
// 네임스페이
// initialize informer factories
var factory informers.SharedInformerFactory
if c.client.namespace == AllNamespaces {
factory = informers.NewSharedInformerFactory(c.client.kubeClient, resync)
} else {
factory = informers.NewSharedInformerFactoryWithOptions(c.client.kubeClient, resync, informers.WithNamespace(c.client.namespace))
}
// NOTE: the followings captures each informer
// and also calls Informer() method to register the cached type.
// Call to Informer() must happen before factory.Star() or it hangs.
// core/V1 informers
coreInformers := factory.Core().V1()
c.namespaceInformer = coreInformers.Namespaces()
namespaceHasSynced := c.namespaceInformer.Informer().HasSynced
c.nodeInformer = coreInformers.Nodes()
nodeHasSynced := c.nodeInformer.Informer().HasSynced
c.podInformer = coreInformers.Pods()
podHasSynced := c.podInformer.Informer().HasSynced
c.pvInformer = coreInformers.PersistentVolumes()
pvHasSynced := c.pvInformer.Informer().HasSynced
c.pvcInformer = coreInformers.PersistentVolumeClaims()
pvcHasSynced := c.pvcInformer.Informer().HasSynced
// Apps/v1 Informers
appsInformers := factory.Apps().V1()
c.deploymentInformer = appsInformers.Deployments()
deploymentHasSynced := c.deploymentInformer.Informer().HasSynced
c.daemonSetInformer = appsInformers.DaemonSets()
daemonsetHasSynced := c.daemonSetInformer.Informer().HasSynced
c.replicaSetInformer = appsInformers.ReplicaSets()
replicasetHasSynced := c.replicaSetInformer.Informer().HasSynced
c.statefulSetInformer = appsInformers.StatefulSets()
statefulsetHasSynced := c.statefulSetInformer.Informer().HasSynced
// Batch informers
batchInformers := factory.Batch().V1()
c.jobInformer = batchInformers.Jobs()
jobHasSynced := c.jobInformer.Informer().HasSynced
c.cronJobInformer = batchInformers.CronJobs()
cronJobHasSynced := c.cronJobInformer.Informer().HasSynced
factory.Start(ctx.Done())
// wait immediately for core resources to syn
// wait for core resources to sync
if ok := cache.WaitForCacheSync(ctx.Done(),
namespaceHasSynced,
nodeHasSynced,
podHasSynced,
); !ok {
panic("core resources failed to sync [namespaces, nodes, pods]")
}
// defer waiting for non-core resources to sync
go func() {
ok := cache.WaitForCacheSync(ctx.Done(),
pvHasSynced,
pvcHasSynced,
deploymentHasSynced,
daemonsetHasSynced,
replicasetHasSynced,
statefulsetHasSynced,
jobHasSynced,
cronJobHasSynced,
)
if !ok {
panic("resource failed to sync")
}
}()
c.setupSummaryHandler(ctx, c.summaryRefreshFunc)
c.setupNodeHandler(ctx, c.nodeRefreshFunc)
c.installPodsHandler(ctx, c.podRefreshFunc)
return nil
}