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/
apiserver.go
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/
apiserver.go
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/*
Copyright 2020 The Bulward Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package apiserver
import (
"fmt"
"os"
"github.com/spf13/cobra"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
genericapiserver "k8s.io/apiserver/pkg/server"
"k8s.io/apiserver/pkg/server/healthz"
"k8s.io/client-go/dynamic"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/tools/clientcmd"
"sigs.k8s.io/apiserver-builder-alpha/pkg/apiserver"
"sigs.k8s.io/apiserver-builder-alpha/pkg/builders"
"sigs.k8s.io/apiserver-builder-alpha/pkg/cmd/server"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
"k8c.io/bulward/pkg/apis"
apiserverapi "k8c.io/bulward/pkg/apis/apiserver"
apiserverv1alpha1 "k8c.io/bulward/pkg/apis/apiserver/v1alpha1"
storagev1alpha1 "k8c.io/bulward/pkg/apis/storage/v1alpha1"
"k8c.io/bulward/pkg/openapi"
)
type flags struct {
bulwardSystemNamespace string
metricsAddr string
}
const (
componentAPIServer = "apiserver"
)
func init() {
// due to apiserver-builder-alpha usage we must use the following scheme
utilruntime.Must(clientgoscheme.AddToScheme(builders.Scheme))
utilruntime.Must(storagev1alpha1.AddToScheme(builders.Scheme))
utilruntime.Must(apiserverapi.AddToScheme(builders.Scheme))
utilruntime.Must(apiserverv1alpha1.AddToScheme(builders.Scheme))
}
// +kubebuilder:rbac:groups=admissionregistration.k8s.io,resources=mutatingwebhookconfigurations;validatingwebhookconfigurations,verbs=get;list;watch
// +kubebuilder:rbac:groups="",resources=namespaces,verbs=get;list;watch
// +kubebuilder:rbac:groups=authorization.k8s.io,resources=subjectaccessreviews,verbs=create
// +kubebuilder:rbac:groups=storage.bulward.io,resources=organizations,verbs=create;get;list;watch;update;patch;delete
// +kubebuilder:rbac:groups=storage.bulward.io,resources=projects,verbs=create;get;list;watch;update;patch;delete;deletecollection
func NewAPIServerCommand() *cobra.Command {
log := ctrl.Log.WithName("apiserver")
_ = log
signalCh := genericapiserver.SetupSignalHandler()
flags := &flags{}
cmd, _ := server.NewCommandStartServer(
"",
os.Stdout,
os.Stderr,
apis.GetAllApiBuilders(),
signalCh,
"apiserver",
"v0",
func(apiServer *apiserver.Config) error {
apiServer.RecommendedConfig.HealthzChecks = filterHealthChecks(apiServer.RecommendedConfig.HealthzChecks, "etcd")
apiServer.RecommendedConfig.LivezChecks = filterHealthChecks(apiServer.RecommendedConfig.LivezChecks, "etcd")
apiServer.RecommendedConfig.ReadyzChecks = filterHealthChecks(apiServer.RecommendedConfig.ReadyzChecks, "etcd")
apiServer.RecommendedConfig.RESTOptionsGetter = nil // we're not using etcd nor anything like this
return nil
},
)
cmd.Use = componentAPIServer
cmd.PreRunE = func(cmd *cobra.Command, args []string) error {
// from server.StartApiServerWithOptions()
// which isn't called during server.NewCommandStartServer
server.GetOpenApiDefinition = openapi.GetOpenAPIDefinitions
if flags.bulwardSystemNamespace == "" {
return fmt.Errorf("--bulward-system-namespace or ENVVAR BULWARD_NAMESPACE must be set")
}
loader := clientcmd.NewDefaultClientConfigLoadingRules()
loader.ExplicitPath = cmd.Flag("kubeconfig").Value.String()
cfg, err := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
loader,
&clientcmd.ConfigOverrides{},
).ClientConfig()
if err != nil {
return err
}
mapper, err := apiutil.NewDynamicRESTMapper(cfg)
if err != nil {
return err
}
k8sClient, err := client.New(cfg, client.Options{
Scheme: builders.Scheme,
Mapper: mapper,
})
if err != nil {
return err
}
dynamicClient, err := dynamic.NewForConfig(cfg)
if err != nil {
return err
}
// Organization
if err := apiserverapi.OrganizationRESTSingleton.InjectMapper(mapper); err != nil {
return err
}
if err := apiserverapi.OrganizationRESTSingleton.InjectClient(k8sClient); err != nil {
return err
}
if err := apiserverapi.OrganizationRESTSingleton.InjectDynamicClient(dynamicClient); err != nil {
return err
}
if err := apiserverapi.OrganizationRESTSingleton.InjectScheme(builders.Scheme); err != nil {
return err
}
// Project
if err := apiserverapi.ProjectRESTSingleton.InjectMapper(mapper); err != nil {
return err
}
if err := apiserverapi.ProjectRESTSingleton.InjectClient(k8sClient); err != nil {
return err
}
if err := apiserverapi.ProjectRESTSingleton.InjectDynamicClient(dynamicClient); err != nil {
return err
}
if err := apiserverapi.ProjectRESTSingleton.InjectScheme(builders.Scheme); err != nil {
return err
}
return nil
}
cmd.Flags().StringVar(&flags.metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
cmd.Flags().StringVar(&flags.bulwardSystemNamespace, "bulward-system-namespace", os.Getenv("BULWARD_NAMESPACE"), "The namespace that Bulward controller manager deploys to.")
return cmd
}
func filterHealthChecks(in []healthz.HealthChecker, exclude string) []healthz.HealthChecker {
var out []healthz.HealthChecker
for _, it := range in {
if it.Name() != exclude {
out = append(out, it)
}
}
return out
}