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crd-migration.go
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crd-migration.go
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package tests
import (
"os/exec"
"time"
migrationv1alpha1 "github.com/kubernetes-sigs/kube-storage-version-migrator/pkg/apis/migration/v1alpha1"
migrationclient "github.com/kubernetes-sigs/kube-storage-version-migrator/pkg/clients/clientset"
"github.com/kubernetes-sigs/kube-storage-version-migrator/test/e2e/util"
. "github.com/onsi/ginkgo"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/discovery"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
)
const (
// The migration trigger controller redo the discovery every discoveryPeriod.
discoveryPeriod = 10 * time.Minute
)
func succeeded(conditions []migrationv1alpha1.MigrationCondition) bool {
for _, c := range conditions {
if c.Type == migrationv1alpha1.MigrationSucceeded && c.Status == corev1.ConditionTrue {
return true
}
}
return false
}
func storageVersionHash(d discovery.DiscoveryInterface, groupversion, resource string) (string, error) {
rl, err := d.ServerResourcesForGroupVersion(groupversion)
if err != nil {
return "", err
}
for _, r := range rl.APIResources {
if r.Name == resource {
return r.StorageVersionHash, nil
}
}
return "", nil
}
var _ = Describe("storage version migrator", func() {
It("should migrate CRD", func() {
setupMigrator()
cfg, err := clientcmd.BuildConfigFromFlags("", "/workspace/.kube/config")
if err != nil {
util.Failf("can't build client config: %v", err)
}
client, err := migrationclient.NewForConfig(rest.AddUserAgent(cfg, "e2e test"))
if err != nil {
util.Failf("can't build client: %v", err)
}
By("Wait for the testCRD to appear in the discovery document")
var v1Hash string
err = wait.PollImmediate(10*time.Second, 1*time.Minute, func() (bool, error) {
v1Hash, err = storageVersionHash(client.Discovery(), "migrationtest.k8s.io/v1", "tests")
if err != nil {
util.Logf("failed to fetch the storage version of the crd, %v. Retrying.", err)
return false, nil
}
if v1Hash == "" {
return false, nil
}
return true, nil
})
if err != nil {
util.Failf("%v", err)
}
By("Wait for storage states to be created")
err = wait.PollImmediate(10*time.Second, 1*time.Minute, func() (bool, error) {
l, err := client.MigrationV1alpha1().StorageStates().List(metav1.ListOptions{})
if err != nil {
util.Failf("%v", err)
}
if len(l.Items) != 0 {
return true, nil
}
return false, nil
})
if err != nil {
util.Failf("%v", err)
}
By("Wait for the storage state of the CRD to be created")
var crdStorageState *migrationv1alpha1.StorageState
err = wait.PollImmediate(10*time.Second, 1*time.Minute, func() (bool, error) {
var err error
crdStorageState, err = client.MigrationV1alpha1().StorageStates().Get("tests.migrationtest.k8s.io", metav1.GetOptions{})
if err != nil && !errors.IsNotFound(err) {
util.Failf("%v", err)
}
if err != nil && errors.IsNotFound(err) {
return false, nil
}
return true, nil
})
if err != nil {
util.Failf("%v", err)
}
if a, e := crdStorageState.Status.CurrentStorageVersionHash, v1Hash; a != e {
util.Failf("unexpected storage version hash %s, expected, %s", a, e)
}
By("Change the storage version of the CRD")
output, err := exec.Command("kubectl", "patch", "crd", "tests.migrationtest.k8s.io", `--patch={"spec":{"versions":[{"name":"v1","served":true,"storage":false},{"name":"v2","served":true,"storage":true}]}}`).CombinedOutput()
if err != nil {
util.Failf("%s", output)
}
By("Wait for the storageVersionHash of the CRD to change in the discovery document")
var v2Hash string
err = wait.PollImmediate(10*time.Second, 1*time.Minute, func() (bool, error) {
v2Hash, err = storageVersionHash(client.Discovery(), "migrationtest.k8s.io/v1", "tests")
if err != nil {
util.Logf("failed to fetch the storage version of the crd, %v. Retrying.", err)
return false, nil
}
if v2Hash == "" || v2Hash == v1Hash {
return false, nil
}
return true, nil
})
if err != nil {
util.Failf("%v", err)
}
By("Wait for the storage state of the CRD to change")
// Wait for discoveryPeriod + 1 minute to give the triggering controller enough time to detect and react.
err = wait.PollImmediate(10*time.Second, discoveryPeriod+1*time.Minute, func() (bool, error) {
var err error
crdStorageState, err = client.MigrationV1alpha1().StorageStates().Get("tests.migrationtest.k8s.io", metav1.GetOptions{})
if err != nil {
util.Failf("%v", err)
}
if crdStorageState.Status.CurrentStorageVersionHash != v2Hash {
return false, nil
}
return true, nil
})
if err != nil {
util.Failf("%v", err)
}
By("Wait for all storage states to converge")
err = wait.PollImmediate(30*time.Second, 10*time.Minute, func() (bool, error) {
l, err := client.MigrationV1alpha1().StorageStates().List(metav1.ListOptions{})
if err != nil {
util.Failf("%v", err)
}
for _, ss := range l.Items {
if len(ss.Status.PersistedStorageVersionHashes) == 1 && ss.Status.PersistedStorageVersionHashes[0] == ss.Status.CurrentStorageVersionHash {
continue
}
util.Logf("resource %v has persisted hashes %v, and current hash %s",
ss.Spec.Resource,
ss.Status.PersistedStorageVersionHashes,
ss.Status.CurrentStorageVersionHash)
return false, nil
}
return true, nil
})
if err != nil {
util.Failf("%v", err)
}
By("Migrations should have all completed")
l, err := client.MigrationV1alpha1().StorageVersionMigrations().List(metav1.ListOptions{})
if err != nil {
util.Failf("%v", err)
}
for _, m := range l.Items {
if !succeeded(m.Status.Conditions) {
util.Failf("unexpected in progress migration for resource %v", m.Spec.Resource)
}
}
// TODO: actually verify the etcd contents:
// kubectl log into the etcd pod
// etcd pod name: etcd-server-bootstrap-e2e-master
// namespace: kube-system
})
})