terraform/internal/backend/remote-state/kubernetes/backend_test.go

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package kubernetes
import (
"context"
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"fmt"
"math/rand"
"os"
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"sync"
"testing"
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"time"
"github.com/hashicorp/terraform/internal/backend"
"github.com/hashicorp/terraform/internal/states/statemgr"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
secretSuffix = "test-state"
)
var namespace string
// verify that we are doing ACC tests or the k8s tests specifically
func testACC(t *testing.T) {
skip := os.Getenv("TF_ACC") == "" && os.Getenv("TF_K8S_TEST") == ""
if skip {
t.Log("k8s backend tests require setting TF_ACC or TF_K8S_TEST")
t.Skip()
}
ns := os.Getenv("KUBE_NAMESPACE")
if ns != "" {
namespace = ns
} else {
namespace = "default"
}
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cleanupK8sResources(t)
}
func TestBackend_impl(t *testing.T) {
var _ backend.Backend = new(Backend)
}
func TestBackend(t *testing.T) {
testACC(t)
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defer cleanupK8sResources(t)
b1 := backend.TestBackendConfig(t, New(), backend.TestWrapConfig(map[string]interface{}{
"secret_suffix": secretSuffix,
}))
// Test
backend.TestBackendStates(t, b1)
}
func TestBackendLocks(t *testing.T) {
testACC(t)
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defer cleanupK8sResources(t)
// Get the backend. We need two to test locking.
b1 := backend.TestBackendConfig(t, New(), backend.TestWrapConfig(map[string]interface{}{
"secret_suffix": secretSuffix,
}))
b2 := backend.TestBackendConfig(t, New(), backend.TestWrapConfig(map[string]interface{}{
"secret_suffix": secretSuffix,
}))
// Test
backend.TestBackendStateLocks(t, b1, b2)
backend.TestBackendStateForceUnlock(t, b1, b2)
}
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func TestBackendLocksSoak(t *testing.T) {
testACC(t)
defer cleanupK8sResources(t)
clientCount := 100
lockAttempts := 100
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lockers := []statemgr.Locker{}
for i := 0; i < clientCount; i++ {
b := backend.TestBackendConfig(t, New(), backend.TestWrapConfig(map[string]interface{}{
"secret_suffix": secretSuffix,
}))
s, err := b.StateMgr(backend.DefaultStateName)
if err != nil {
t.Fatalf("Error creating state manager: %v", err)
}
lockers = append(lockers, s.(statemgr.Locker))
}
wg := sync.WaitGroup{}
for i, l := range lockers {
wg.Add(1)
go func(locker statemgr.Locker, n int) {
defer wg.Done()
li := statemgr.NewLockInfo()
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li.Operation = "test"
li.Who = fmt.Sprintf("client-%v", n)
for i := 0; i < lockAttempts; i++ {
id, err := locker.Lock(li)
if err != nil {
continue
}
// hold onto the lock for a little bit
time.Sleep(time.Duration(rand.Intn(10)) * time.Microsecond)
err = locker.Unlock(id)
if err != nil {
t.Errorf("failed to unlock: %v", err)
}
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}
}(l, i)
}
wg.Wait()
}
func cleanupK8sResources(t *testing.T) {
ctx := context.Background()
// Get a backend to use the k8s client
b1 := backend.TestBackendConfig(t, New(), backend.TestWrapConfig(map[string]interface{}{
"secret_suffix": secretSuffix,
}))
b := b1.(*Backend)
sClient, err := b.KubernetesSecretClient()
if err != nil {
t.Fatal(err)
}
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// Delete secrets
opts := metav1.ListOptions{LabelSelector: tfstateKey + "=true"}
secrets, err := sClient.List(ctx, opts)
if err != nil {
t.Fatal(err)
}
delProp := metav1.DeletePropagationBackground
delOps := metav1.DeleteOptions{PropagationPolicy: &delProp}
var errs []error
for _, secret := range secrets.Items {
labels := secret.GetLabels()
key, ok := labels[tfstateSecretSuffixKey]
if !ok {
continue
}
if key == secretSuffix {
err = sClient.Delete(ctx, secret.GetName(), delOps)
if err != nil {
errs = append(errs, err)
}
}
}
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leaseClient, err := b.KubernetesLeaseClient()
if err != nil {
t.Fatal(err)
}
// Delete leases
leases, err := leaseClient.List(ctx, opts)
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if err != nil {
t.Fatal(err)
}
for _, lease := range leases.Items {
labels := lease.GetLabels()
key, ok := labels[tfstateSecretSuffixKey]
if !ok {
continue
}
if key == secretSuffix {
err = leaseClient.Delete(ctx, lease.GetName(), delOps)
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if err != nil {
errs = append(errs, err)
}
}
}
if len(errs) > 0 {
t.Fatal(errs)
}
}