/
self_hosted.go
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/
self_hosted.go
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/*
Copyright 2020 The Kubernetes 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 e2e
import (
"context"
"fmt"
"os"
"path/filepath"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"sigs.k8s.io/controller-runtime/pkg/client"
corev1 "k8s.io/api/core/v1"
"k8s.io/utils/pointer"
clusterv1 "sigs.k8s.io/cluster-api/api/v1alpha3"
"sigs.k8s.io/cluster-api/test/e2e/internal/log"
"sigs.k8s.io/cluster-api/test/framework"
"sigs.k8s.io/cluster-api/test/framework/bootstrap"
"sigs.k8s.io/cluster-api/test/framework/clusterctl"
"sigs.k8s.io/cluster-api/util"
)
// SelfHostedSpecInput is the input for SelfHostedSpec.
type SelfHostedSpecInput struct {
E2EConfig *clusterctl.E2EConfig
ClusterctlConfigPath string
BootstrapClusterProxy framework.ClusterProxy
ArtifactFolder string
SkipCleanup bool
}
// SelfHostedSpec implements a test that verifies Cluster API creating a cluster, pivoting to a self-hosted cluster.
func SelfHostedSpec(ctx context.Context, inputGetter func() SelfHostedSpecInput) {
var (
specName = "self-hosted"
input SelfHostedSpecInput
namespace *corev1.Namespace
cancelWatches context.CancelFunc
clusterResources *clusterctl.ApplyClusterTemplateAndWaitResult
selfHostedClusterProxy framework.ClusterProxy
selfHostedNamespace *corev1.Namespace
selfHostedCancelWatches context.CancelFunc
selfHostedCluster *clusterv1.Cluster
)
BeforeEach(func() {
Expect(ctx).NotTo(BeNil(), "ctx is required for %s spec", specName)
input = inputGetter()
Expect(input.E2EConfig).ToNot(BeNil(), "Invalid argument. input.E2EConfig can't be nil when calling %s spec", specName)
Expect(input.ClusterctlConfigPath).To(BeAnExistingFile(), "Invalid argument. input.ClusterctlConfigPath must be an existing file when calling %s spec", specName)
Expect(input.BootstrapClusterProxy).ToNot(BeNil(), "Invalid argument. input.BootstrapClusterProxy can't be nil when calling %s spec", specName)
Expect(os.MkdirAll(input.ArtifactFolder, 0755)).To(Succeed(), "Invalid argument. input.ArtifactFolder can't be created for %s spec", specName)
Expect(input.E2EConfig.Variables).To(HaveKey(KubernetesVersion))
// Setup a Namespace where to host objects for this spec and create a watcher for the namespace events.
namespace, cancelWatches = setupSpecNamespace(context.TODO(), specName, input.BootstrapClusterProxy, input.ArtifactFolder)
})
It("Should pivot the bootstrap cluster to a self-hosted cluster", func() {
By("Creating a workload cluster")
clusterResources = clusterctl.ApplyClusterTemplateAndWait(context.TODO(), clusterctl.ApplyClusterTemplateAndWaitInput{
ClusterProxy: input.BootstrapClusterProxy,
ConfigCluster: clusterctl.ConfigClusterInput{
LogFolder: filepath.Join(input.ArtifactFolder, "clusters", input.BootstrapClusterProxy.GetName()),
ClusterctlConfigPath: input.ClusterctlConfigPath,
KubeconfigPath: input.BootstrapClusterProxy.GetKubeconfigPath(),
InfrastructureProvider: clusterctl.DefaultInfrastructureProvider,
Flavor: clusterctl.DefaultFlavor,
Namespace: namespace.Name,
ClusterName: fmt.Sprintf("%s-%s", specName, util.RandomString(6)),
KubernetesVersion: input.E2EConfig.GetVariable(KubernetesVersion),
ControlPlaneMachineCount: pointer.Int64Ptr(1),
WorkerMachineCount: pointer.Int64Ptr(1),
},
WaitForClusterIntervals: input.E2EConfig.GetIntervals(specName, "wait-cluster"),
WaitForControlPlaneIntervals: input.E2EConfig.GetIntervals(specName, "wait-control-plane"),
WaitForMachineDeployments: input.E2EConfig.GetIntervals(specName, "wait-worker-nodes"),
})
By("Turning the workload cluster into a management cluster")
// In case of the cluster id a DockerCluster, we should load controller images into the nodes.
// Nb. this can be achieved also by changing the DockerMachine spec, but for the time being we are using
// this approach because this allows to have a single source of truth for images, the e2e config
cluster := clusterResources.Cluster
if cluster.Spec.InfrastructureRef.Kind == "DockerCluster" {
Expect(bootstrap.LoadImagesToKindCluster(context.TODO(), bootstrap.LoadImagesToKindClusterInput{
Name: cluster.Name,
Images: input.E2EConfig.Images,
})).To(Succeed())
}
// Get a ClusterBroker so we can interact with the workload cluster
selfHostedClusterProxy = input.BootstrapClusterProxy.GetWorkloadCluster(context.TODO(), cluster.Namespace, cluster.Name)
Byf("Creating a namespace for hosting the %s test spec", specName)
selfHostedNamespace, selfHostedCancelWatches = framework.CreateNamespaceAndWatchEvents(context.TODO(), framework.CreateNamespaceAndWatchEventsInput{
Creator: selfHostedClusterProxy.GetClient(),
ClientSet: selfHostedClusterProxy.GetClientSet(),
Name: namespace.Name,
LogFolder: filepath.Join(input.ArtifactFolder, "clusters", "bootstrap"),
})
By("Initializing the workload cluster")
clusterctl.InitManagementClusterAndWatchControllerLogs(context.TODO(), clusterctl.InitManagementClusterAndWatchControllerLogsInput{
ClusterProxy: selfHostedClusterProxy,
ClusterctlConfigPath: input.ClusterctlConfigPath,
InfrastructureProviders: input.E2EConfig.InfrastructureProviders(),
LogFolder: filepath.Join(input.ArtifactFolder, "clusters", cluster.Name),
}, input.E2EConfig.GetIntervals(specName, "wait-controllers")...)
By("Ensure API servers are stable before doing move")
// Nb. This check was introduced to prevent doing move to self-hosted in an aggressive way and thus avoid flakes.
// More specifically, we were observing the test failing to get objects from the API server during move, so we
// are now testing the API servers are stable before starting move.
Consistently(func() error {
kubeSystem := &corev1.Namespace{}
return input.BootstrapClusterProxy.GetClient().Get(ctx, client.ObjectKey{Name: "kube-system"}, kubeSystem)
}, "5s", "100ms").Should(BeNil(), "Failed to assert bootstrap API server stability")
Consistently(func() error {
kubeSystem := &corev1.Namespace{}
return selfHostedClusterProxy.GetClient().Get(ctx, client.ObjectKey{Name: "kube-system"}, kubeSystem)
}, "5s", "100ms").Should(BeNil(), "Failed to assert self-hosted API server stability")
By("Moving the cluster to self hosted")
clusterctl.Move(context.TODO(), clusterctl.MoveInput{
LogFolder: filepath.Join(input.ArtifactFolder, "clusters", "bootstrap"),
ClusterctlConfigPath: input.ClusterctlConfigPath,
FromKubeconfigPath: input.BootstrapClusterProxy.GetKubeconfigPath(),
ToKubeconfigPath: selfHostedClusterProxy.GetKubeconfigPath(),
Namespace: namespace.Name,
})
log.Logf("Waiting for the cluster to be reconciled after moving to self hosted")
selfHostedCluster = framework.DiscoveryAndWaitForCluster(ctx, framework.DiscoveryAndWaitForClusterInput{
Getter: selfHostedClusterProxy.GetClient(),
Namespace: selfHostedNamespace.Name,
Name: cluster.Name,
}, input.E2EConfig.GetIntervals(specName, "wait-cluster")...)
controlPlane := framework.GetKubeadmControlPlaneByCluster(ctx, framework.GetKubeadmControlPlaneByClusterInput{
Lister: selfHostedClusterProxy.GetClient(),
ClusterName: selfHostedCluster.Name,
Namespace: selfHostedCluster.Namespace,
})
Expect(controlPlane).ToNot(BeNil())
By("PASSED!")
})
AfterEach(func() {
if selfHostedNamespace != nil {
// Dump all Cluster API related resources to artifacts before pivoting back.
framework.DumpAllResources(ctx, framework.DumpAllResourcesInput{
Lister: selfHostedClusterProxy.GetClient(),
Namespace: namespace.Name,
LogPath: filepath.Join(input.ArtifactFolder, "clusters", clusterResources.Cluster.Name, "resources"),
})
}
if selfHostedCluster != nil {
By("Ensure API servers are stable before doing move")
// Nb. This check was introduced to prevent doing move back to bootstrap in an aggressive way and thus avoid flakes.
// More specifically, we were observing the test failing to get objects from the API server during move, so we
// are now testing the API servers are stable before starting move.
Consistently(func() error {
kubeSystem := &corev1.Namespace{}
return input.BootstrapClusterProxy.GetClient().Get(ctx, client.ObjectKey{Name: "kube-system"}, kubeSystem)
}, "5s", "100ms").Should(BeNil(), "Failed to assert bootstrap API server stability")
Consistently(func() error {
kubeSystem := &corev1.Namespace{}
return selfHostedClusterProxy.GetClient().Get(ctx, client.ObjectKey{Name: "kube-system"}, kubeSystem)
}, "5s", "100ms").Should(BeNil(), "Failed to assert self-hosted API server stability")
By("Moving the cluster back to bootstrap")
clusterctl.Move(ctx, clusterctl.MoveInput{
LogFolder: filepath.Join(input.ArtifactFolder, "clusters", clusterResources.Cluster.Name),
ClusterctlConfigPath: input.ClusterctlConfigPath,
FromKubeconfigPath: selfHostedClusterProxy.GetKubeconfigPath(),
ToKubeconfigPath: input.BootstrapClusterProxy.GetKubeconfigPath(),
Namespace: selfHostedNamespace.Name,
})
log.Logf("Waiting for the cluster to be reconciled after moving back to booststrap")
clusterResources.Cluster = framework.DiscoveryAndWaitForCluster(ctx, framework.DiscoveryAndWaitForClusterInput{
Getter: input.BootstrapClusterProxy.GetClient(),
Namespace: namespace.Name,
Name: clusterResources.Cluster.Name,
}, input.E2EConfig.GetIntervals(specName, "wait-cluster")...)
}
if selfHostedCancelWatches != nil {
selfHostedCancelWatches()
}
// Dumps all the resources in the spec namespace, then cleanups the cluster object and the spec namespace itself.
dumpSpecResourcesAndCleanup(ctx, specName, input.BootstrapClusterProxy, input.ArtifactFolder, namespace, cancelWatches, clusterResources.Cluster, input.E2EConfig.GetIntervals, input.SkipCleanup)
})
}