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fabric.go
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fabric.go
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// Copyright 2023 The ClusterLink 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 util
import (
"context"
"crypto/tls"
"crypto/x509"
"fmt"
"time"
appsv1 "k8s.io/api/apps/v1"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/e2e-framework/klient/wait"
"sigs.k8s.io/e2e-framework/klient/wait/conditions"
"github.com/clusterlink-net/clusterlink/cmd/clusterlink/config"
"github.com/clusterlink-net/clusterlink/pkg/apis/clusterlink.net/v1alpha1"
"github.com/clusterlink-net/clusterlink/pkg/bootstrap"
"github.com/clusterlink-net/clusterlink/pkg/bootstrap/platform"
"github.com/clusterlink-net/clusterlink/pkg/client"
"github.com/clusterlink-net/clusterlink/pkg/operator/controller"
)
// PeerConfig is a peer configuration.
type PeerConfig struct {
// CRUDMode indicates a CRUD-based controlplane (i.e. not CRD mode).
CRUDMode bool
// DataplaneType is the dataplane type (envoy / go).
DataplaneType string
// Dataplanes is the number of dataplane instances.
Dataplanes uint16
// ControlplanePersistency should be true if controlplane should use persistent storage.
ControlplanePersistency bool
// ExpectLargeDataplaneTraffic hints that a large amount of dataplane traffic is expected.
ExpectLargeDataplaneTraffic bool
// DeployWithOperator deploys clusterlink using an operator.
DeployWithOperator bool
}
type peer struct {
AsyncRunner
cluster *KindCluster
peerCert *bootstrap.Certificate
controlplaneCert *bootstrap.Certificate
dataplaneCert *bootstrap.Certificate
gwctlCert *bootstrap.Certificate
}
// CreateControlplaneCertificate creates the controlplane certificate.
func (p *peer) CreateControlplaneCertificate() {
p.Run(func() error {
cert, err := bootstrap.CreateControlplaneCertificate(p.cluster.Name(), p.peerCert)
if err != nil {
return fmt.Errorf("cannot create controlplane certificate: %w", err)
}
p.controlplaneCert = cert
return nil
})
}
// CreateDataplaneCertificate creates the dataplane certificate.
func (p *peer) CreateDataplaneCertificate() {
p.Run(func() error {
cert, err := bootstrap.CreateDataplaneCertificate(p.cluster.Name(), p.peerCert)
if err != nil {
return fmt.Errorf("cannot create dataplane certificate: %w", err)
}
p.dataplaneCert = cert
return nil
})
}
// CreateGWCTLCertificate creates the gwctl certificate.
func (p *peer) CreateGWCTLCertificate() {
p.Run(func() error {
cert, err := bootstrap.CreateGWCTLCertificate(p.peerCert)
if err != nil {
return fmt.Errorf("cannot create controlplane certificate: %w", err)
}
p.gwctlCert = cert
return nil
})
}
// Fabric represents a collection of clusterlinks.
type Fabric struct {
AsyncRunner
cert *bootstrap.Certificate
peers []*peer
namespace string
baseNamespace string
}
// CreatePeer creates certificates for a new peer on a given kind cluster.
func (f *Fabric) CreatePeer(cluster *KindCluster) {
p := &peer{cluster: cluster}
f.peers = append(f.peers, p)
f.Run(func() error {
cert, err := bootstrap.CreatePeerCertificate(p.cluster.Name(), f.cert)
if err != nil {
return fmt.Errorf("cannot create peer certificate: %w", err)
}
p.peerCert = cert
p.CreateControlplaneCertificate()
p.CreateDataplaneCertificate()
p.CreateGWCTLCertificate()
return p.Wait()
})
}
// SwitchToNewNamespace creates a new namespace to be used for deploying clusterlink.
// It also updates the current nodeport value.
func (f *Fabric) SwitchToNewNamespace(name string, appendName bool) error {
if appendName {
name = f.baseNamespace + "-" + name
} else {
f.baseNamespace = name
}
// create new namespace
for _, p := range f.peers {
if err := p.cluster.CreateNamespace(name); err != nil {
return fmt.Errorf("cannot create namespace %s: %w", name, err)
}
}
if f.namespace != "" {
// delete old namespace
for _, p := range f.peers {
// delete imports to avoid slowing down upcoming tests
var imports v1alpha1.ImportList
if err := p.cluster.Resources().List(context.Background(), &imports); err != nil {
return err
}
for i := range imports.Items {
err := p.cluster.Resources().Delete(context.Background(), &(imports.Items[i]))
if err != nil {
return err
}
}
if err := p.cluster.DeleteNamespace(f.namespace); err != nil {
return fmt.Errorf("cannot delete namespace %s: %w", f.namespace, err)
}
}
}
f.namespace = name
return nil
}
var deployFunc func(target *peer, cfg *PeerConfig) error
// deployUsingOperator deploys ClusterLink using operator.
func (f *Fabric) deployUsingOperator(target *peer, cfg *PeerConfig) error {
instanceName := "cl-instance" + f.namespace
// Create ClusterLink instance
instance, err := f.generateClusterlinkInstance(instanceName, target, cfg)
if err != nil {
return fmt.Errorf("cannot generate ClusterLink instance: %w", err)
}
if err := target.cluster.CreateFromYAML(instance, controller.OperatorNamespace); err != nil {
return fmt.Errorf("cannot create k8s objects: %w", err)
}
// Create k8s secrets
secretsYAML, err := f.generateClusterlinkSecrets(target)
if err != nil {
return fmt.Errorf("cannot generate ClusterLink secrets: %w", err)
}
if err := target.cluster.CreateFromYAML(secretsYAML, f.namespace); err != nil {
return fmt.Errorf("cannot create k8s objects: %w", err)
}
// wait for operator to be ready
dep := appsv1.Deployment{
ObjectMeta: metav1.ObjectMeta{
Name: "cl-operator-controller-manager",
Namespace: controller.OperatorNamespace,
},
}
waitCon := conditions.New(target.cluster.resources).DeploymentConditionMatch(
&dep, appsv1.DeploymentAvailable, v1.ConditionTrue)
err = wait.For(waitCon, wait.WithTimeout(time.Second*60))
if err != nil {
return fmt.Errorf("failed waiting for operator to be ready: %w", err)
}
// wait for instance to be ready
err = wait.For(func(ctx context.Context) (bool, error) {
var inst v1alpha1.Instance
err := target.cluster.Resources().Get(ctx, instanceName, controller.OperatorNamespace, &inst)
if err != nil {
return false, err
}
if c, ok := inst.Status.Controlplane.Conditions[string(v1alpha1.DeploymentReady)]; ok {
if c.Status == metav1.ConditionTrue {
return true, nil
}
}
return false, nil
}, wait.WithTimeout(time.Second*60))
if err != nil {
return fmt.Errorf("failed waiting for instance to be ready: %w", err)
}
return nil
}
// deployUsingK8sYAML deploys ClusterLink using K8s yaml.
func (f *Fabric) deployUsingK8sYAML(target *peer, cfg *PeerConfig) error {
k8sYAML, err := f.generateK8SYAML(target, cfg)
if err != nil {
return fmt.Errorf("cannot generate k8s yaml: %w", err)
}
if err := target.cluster.CreateFromYAML(k8sYAML, f.namespace); err != nil {
return fmt.Errorf("cannot create k8s objects: %w", err)
}
return nil
}
// deployClusterLink deploys clusterlink to the given peer.
func (f *Fabric) deployClusterLink(target *peer, cfg *PeerConfig) (*ClusterLink, error) {
var err error
if f.namespace == "" {
return nil, fmt.Errorf("namespace not set")
}
svcNodePort := "cl-dataplane"
if cfg.DeployWithOperator {
svcNodePort = controller.IngressName
deployFunc = f.deployUsingOperator
} else {
deployFunc = f.deployUsingK8sYAML
}
if err := deployFunc(target, cfg); err != nil {
return nil, err
}
// Wait for dataplane will be ready.
dep := appsv1.Deployment{ObjectMeta: metav1.ObjectMeta{Name: "cl-dataplane", Namespace: f.namespace}}
waitCon := conditions.New(target.cluster.resources).DeploymentConditionMatch(&dep, appsv1.DeploymentAvailable, v1.ConditionTrue)
err = wait.For(waitCon, wait.WithTimeout(time.Second*60))
if err != nil {
return nil, err
}
var service v1.Service
err = target.cluster.resources.Get(context.Background(), svcNodePort, f.namespace, &service)
if err != nil {
return nil, fmt.Errorf("error getting dataplane service: %w", err)
}
port := uint16(service.Spec.Ports[0].NodePort)
cert := target.gwctlCert
certificate, err := tls.X509KeyPair(cert.RawCert(), cert.RawKey())
if err != nil {
return nil, fmt.Errorf("cannot parse gwctl certificate: %w", err)
}
caCertPool := x509.NewCertPool()
if !caCertPool.AppendCertsFromPEM(target.peerCert.RawCert()) {
return nil, fmt.Errorf("unable to parse peer certificate")
}
c := client.New(target.cluster.IP(), port, &tls.Config{
MinVersion: tls.VersionTLS12,
Certificates: []tls.Certificate{certificate},
RootCAs: caCertPool,
ServerName: target.cluster.Name(),
})
clink := &ClusterLink{
cluster: target.cluster,
namespace: f.namespace,
client: c,
port: port,
crdMode: !cfg.CRUDMode,
}
// wait for default service account to be created
for t := time.Now(); time.Since(t) < time.Second*30; time.Sleep(time.Millisecond * 100) {
err = target.cluster.resources.Get(context.Background(), "default", f.namespace, &v1.ServiceAccount{})
if err == nil {
break
}
}
if err != nil {
return nil, fmt.Errorf("error getting default service account: %w", err)
}
if cfg.CRUDMode {
if err := clink.WaitForControlplaneAPI(); err != nil {
return nil, fmt.Errorf("error waiting for controlplane API server: %w", err)
}
}
return clink, nil
}
// DeployClusterlinks deploys clusterlink to <peerCount> clusters.
func (f *Fabric) DeployClusterlinks(peerCount uint8, cfg *PeerConfig) ([]*ClusterLink, error) {
if int(peerCount) > len(f.peers) {
return nil, fmt.Errorf(
"cannot deploy %d clusterlinks to %d clusters",
peerCount, len(f.peers))
}
if cfg == nil {
// default config
cfg = &PeerConfig{
DataplaneType: platform.DataplaneTypeEnvoy,
Dataplanes: 1,
}
}
clusterlinks := make([]*ClusterLink, peerCount)
for i := uint8(0); i < peerCount; i++ {
f.Run(func(i uint8) func() error {
return func() error {
cl, err := f.deployClusterLink(f.peers[i], cfg)
if err != nil {
return fmt.Errorf(
"cannot deploy clusterlink to cluster %s: %w",
f.peers[i].cluster.Name(), err)
}
clusterlinks[i] = cl
return nil
}
}(i))
}
if err := f.Wait(); err != nil {
return nil, err
}
return clusterlinks, nil
}
// PeerKindCluster returns the peer kind cluster.
func (f *Fabric) PeerKindCluster(num int) *KindCluster {
return f.peers[num].cluster
}
// Namespace returns fabric namespace.
func (f *Fabric) Namespace() string {
return f.namespace
}
// NewFabric returns a new empty fabric.
func NewFabric() (*Fabric, error) {
cert, err := bootstrap.CreateFabricCertificate(config.DefaultFabric)
if err != nil {
return nil, fmt.Errorf("cannot create fabric certificate: %w", err)
}
return &Fabric{cert: cert}, nil
}