/
addons.go
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/
addons.go
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/*
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 addons
import (
"context"
"fmt"
"github.com/awslabs/kubernetes-iteration-toolkit/operator/pkg/apis/controlplane"
"github.com/awslabs/kubernetes-iteration-toolkit/operator/pkg/apis/controlplane/v1alpha1"
"github.com/awslabs/kubernetes-iteration-toolkit/operator/pkg/controllers/master"
"github.com/awslabs/kubernetes-iteration-toolkit/operator/pkg/errors"
"github.com/awslabs/kubernetes-iteration-toolkit/operator/pkg/kubeprovider"
"github.com/awslabs/kubernetes-iteration-toolkit/operator/pkg/utils/keypairs"
"github.com/awslabs/kubernetes-iteration-toolkit/operator/pkg/utils/object"
"github.com/awslabs/kubernetes-iteration-toolkit/operator/pkg/utils/scheme"
"github.com/awslabs/kubernetes-iteration-toolkit/operator/pkg/utils/secrets"
"go.uber.org/zap"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/tools/clientcmd"
"sigs.k8s.io/controller-runtime/pkg/client"
)
type Controller struct {
substrateClient *kubeprovider.Client
}
func New(kubeClient *kubeprovider.Client) *Controller {
return &Controller{substrateClient: kubeClient}
}
// Reconcile adds add-ons to the guest cluster provisioned
func (c *Controller) Reconcile(ctx context.Context, controlPlane *v1alpha1.ControlPlane) error {
guestClusterClient, err := c.createKubeClient(ctx, object.NamespacedName(
controlPlane.ClusterName(), controlPlane.Namespace))
if err != nil {
return err
}
// reconcile addons to the guest cluster
for _, resource := range []controlplane.Controller{
KubeProxyController(guestClusterClient, c.substrateClient),
CoreDNSController(guestClusterClient),
RBACController(guestClusterClient),
} {
if err := resource.Reconcile(ctx, controlPlane); err != nil {
return err
}
}
zap.S().Infof("[%v] Addons reconciled", controlPlane.ClusterName())
return nil
}
// createKubeClient returns a kubeClient for the new cluster created from the
// admin config stored in management cluster
func (c *Controller) createKubeClient(ctx context.Context, nn types.NamespacedName) (*kubeprovider.Client, error) {
// Get the admin kube config stored in a secret in the management cluster
adminSecret, err := keypairs.Reconciler(c.substrateClient).GetSecretFromServer(ctx, object.NamespacedName(
master.KubeAdminSecretNameFor(nn.Name), nn.Namespace))
if err != nil {
return nil, err
}
restConfig, err := clientcmd.RESTConfigFromKubeConfig(adminSecret.Data[secrets.SecretConfigKey])
if err != nil {
return nil, fmt.Errorf("creating rest config for new cluster, %w", err)
}
newClient, err := client.New(restConfig, client.Options{Scheme: scheme.GuestCluster})
if err != nil {
if errors.IsDNSLookUpNoSuchHost(err) {
return nil, fmt.Errorf("%v control plane endpoint not ready, lookup failed, %w", nn.Name, errors.WaitingForSubResources)
}
if errors.IsNetIOTimeOut(err) {
// This happens 1-2 times, but if it happens more we would want to know in the logs
zap.S().Errorf("Creating kubeclient, net i/o timed out for control plane %s endpoint", nn.Name)
return nil, fmt.Errorf("net i/o timeout for %v control plane endpoint, %w", nn.Name, errors.WaitingForSubResources)
}
if errors.IsConnectionRefused(err) {
zap.S().Errorf("Creating kubeclient, connection refused for control plane %s endpoint", nn.Name)
return nil, fmt.Errorf("connection refused %v control plane endpoint, %w", nn.Name, errors.WaitingForSubResources)
}
return nil, fmt.Errorf("creating kubeclient for new cluster, %w", err)
}
return kubeprovider.New(newClient), nil
}
func (c *Controller) Finalize(_ context.Context, _ *v1alpha1.ControlPlane) (err error) {
return nil
}