mirror of https://github.com/k3s-io/k3s.git
61 lines
1.7 KiB
Go
61 lines
1.7 KiB
Go
package apiaddresses
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import (
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"bytes"
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"context"
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"encoding/json"
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"github.com/k3s-io/k3s/pkg/daemons/config"
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"github.com/k3s-io/k3s/pkg/etcd"
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"github.com/k3s-io/k3s/pkg/util"
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"github.com/k3s-io/k3s/pkg/version"
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controllerv1 "github.com/rancher/wrangler/pkg/generated/controllers/core/v1"
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clientv3 "go.etcd.io/etcd/client/v3"
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v1 "k8s.io/api/core/v1"
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)
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type EndpointsControllerGetter func() controllerv1.EndpointsController
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func Register(ctx context.Context, runtime *config.ControlRuntime, endpoints controllerv1.EndpointsController) error {
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h := &handler{
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endpointsController: endpoints,
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runtime: runtime,
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ctx: ctx,
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}
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endpoints.OnChange(ctx, version.Program+"-apiserver-lb-controller", h.sync)
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cl, err := etcd.GetClient(h.ctx, h.runtime, "https://127.0.0.1:2379")
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if err != nil {
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return err
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}
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h.etcdClient = cl
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return nil
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}
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type handler struct {
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endpointsController controllerv1.EndpointsController
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runtime *config.ControlRuntime
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ctx context.Context
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etcdClient *clientv3.Client
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}
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// This controller will update the version.program/apiaddresses etcd key with a list of
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// api addresses endpoints found in the kubernetes service in the default namespace
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func (h *handler) sync(key string, endpoint *v1.Endpoints) (*v1.Endpoints, error) {
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if endpoint != nil &&
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endpoint.Namespace == "default" &&
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endpoint.Name == "kubernetes" {
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w := &bytes.Buffer{}
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if err := json.NewEncoder(w).Encode(util.GetAddresses(endpoint)); err != nil {
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return nil, err
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}
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_, err := h.etcdClient.Put(h.ctx, etcd.AddressKey, w.String())
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if err != nil {
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return nil, err
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}
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}
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return endpoint, nil
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}
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