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server.go
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server.go
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package server
import (
"context"
"fmt"
"net/http"
"time"
"github.com/cnrancher/edge-api-server/pkg/auth"
"github.com/cnrancher/edge-api-server/pkg/controllers"
"github.com/cnrancher/edge-api-server/pkg/server/ui"
"github.com/cnrancher/edge-api-server/pkg/settings"
"github.com/cnrancher/edge-api-server/pkg/steve/pkg/catalogapi"
"github.com/cnrancher/edge-api-server/pkg/steve/pkg/devicetemplateapi"
"github.com/cnrancher/edge-api-server/pkg/steve/pkg/devicetemplaterevisionapi"
"github.com/rancher/apiserver/pkg/writer"
"github.com/rancher/steve/pkg/accesscontrol"
"github.com/rancher/steve/pkg/server"
steveserver "github.com/rancher/steve/pkg/server"
"github.com/rancher/wrangler/pkg/ratelimit"
"github.com/sirupsen/logrus"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
)
type Config struct {
Namespace string
Threadiness int
HTTPListenPort int
HTTPSListenPort int
}
type EdgeServer struct {
*server.Controllers
Config Config
RestConfig *restclient.Config
DynamicClient dynamic.Interface
ClientSet *kubernetes.Clientset
Context context.Context
Handler http.Handler
ASL accesscontrol.AccessSetLookup
}
func (s *EdgeServer) ListenAndServe(ctx context.Context) error {
server, err := newSteveServer(ctx, s)
if err != nil {
return err
}
return server.ListenAndServe(ctx, s.Config.HTTPSListenPort, s.Config.HTTPListenPort, nil)
}
func New(ctx context.Context, clientConfig clientcmd.ClientConfig, cfg *Config) (*EdgeServer, error) {
restConfig, err := clientConfig.ClientConfig()
if err != nil {
return nil, err
}
restConfig.RateLimiter = ratelimit.None
if err := Wait(ctx, *restConfig); err != nil {
return nil, err
}
clientSet, err := kubernetes.NewForConfig(restConfig)
if err != nil {
return nil, fmt.Errorf("kubernetes clientset create error: %s", err.Error())
}
dynamicClient, err := dynamic.NewForConfig(restConfig)
if err != nil {
return nil, fmt.Errorf("kubernetes dynamic client create error:%s", err.Error())
}
steveControllers, err := server.NewController(restConfig, nil)
if err != nil {
return nil, err
}
asl := accesscontrol.NewAccessStore(ctx, true, steveControllers.RBAC)
err = controllers.Setup(ctx, restConfig, clientSet, 5)
if err != nil {
return nil, err
}
return &EdgeServer{
Controllers: steveControllers,
Config: *cfg,
Context: ctx,
ClientSet: clientSet,
DynamicClient: dynamicClient,
RestConfig: restConfig,
ASL: asl,
}, nil
}
func newSteveServer(ctx context.Context, edgeServer *EdgeServer) (*steveserver.Server, error) {
a := auth.NewK3sAuthenticator(ctx, edgeServer.RestConfig.Host, edgeServer.ClientSet)
handler := SetupLocalHandler(edgeServer)
catalogAPIServer := &catalogapi.Server{}
deviceTemplateAPIServer := &devicetemplateapi.Server{Authenticator: a}
deviceTemplateRevisionAPIServer := &devicetemplaterevisionapi.Server{Authenticator: a}
return &steveserver.Server{
Controllers: edgeServer.Controllers,
AccessSetLookup: edgeServer.ASL,
RestConfig: edgeServer.RestConfig,
AuthMiddleware: auth.ToAuthMiddleware(a),
Next: handler,
DashboardURL: func() string {
if settings.UIIndex.Get() == "local" {
return settings.UIPath.Get()
}
return settings.UIIndex.Get()
},
StartHooks: []steveserver.StartHook{
catalogAPIServer.Setup,
deviceTemplateAPIServer.Setup,
deviceTemplateRevisionAPIServer.Setup,
},
HTMLResponseWriter: writer.HTMLResponseWriter{
CSSURL: ui.CSSURLGetter,
JSURL: ui.JSURLGetter,
APIUIVersion: ui.APIUIVersionGetter,
},
}, nil
}
func Wait(ctx context.Context, config rest.Config) error {
client, err := kubernetes.NewForConfig(&config)
if err != nil {
return err
}
for {
_, err := client.Discovery().ServerVersion()
if err == nil {
break
}
logrus.Infof("Waiting for server to become available: %v", err)
select {
case <-ctx.Done():
return fmt.Errorf("startup canceled")
case <-time.After(2 * time.Second):
}
}
return nil
}