open-consul/agent/consul/state/store_integration_test.go

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package state
import (
"context"
"testing"
"time"
"github.com/hashicorp/consul/acl"
"github.com/hashicorp/consul/agent/consul/stream"
"github.com/hashicorp/consul/agent/structs"
"github.com/stretchr/testify/require"
)
func TestStore_IntegrationWithEventPublisher_ACLTokenUpdate(t *testing.T) {
t.Parallel()
require := require.New(t)
s := testACLTokensStateStore(t)
// Setup token and wait for good state
token := createTokenAndWaitForACLEventPublish(t, s)
// Register the subscription.
subscription := &stream.SubscribeRequest{
Topic: topicService,
Key: "nope",
Token: token.SecretID,
}
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
publisher := stream.NewEventPublisher(ctx, newTestSnapshotHandlers(s), 0)
s.db.publisher = publisher
sub, err := publisher.Subscribe(subscription)
require.NoError(err)
defer sub.Unsubscribe()
eventCh := testRunSub(sub)
// Stream should get EndOfSnapshot
e := assertEvent(t, eventCh)
require.True(e.IsEndOfSnapshot())
// Update an unrelated token.
token2 := &structs.ACLToken{
AccessorID: "a7bbf480-8440-4f55-acfc-6fdca25cb13e",
SecretID: "72e81982-7a0f-491f-a60e-c9c802ac1402",
}
token2.SetHash(false)
require.NoError(s.ACLTokenSet(3, token2.Clone(), false))
// Ensure there's no reset event.
assertNoEvent(t, eventCh)
// Now update the token used in the subscriber.
token3 := &structs.ACLToken{
AccessorID: "3af117a9-2233-4cf4-8ff8-3c749c9906b4",
SecretID: "4268ce0d-d7ae-4718-8613-42eba9036020",
Description: "something else",
}
token3.SetHash(false)
require.NoError(s.ACLTokenSet(4, token3.Clone(), false))
// Ensure the reset event was sent.
err = assertErr(t, eventCh)
require.Equal(stream.ErrSubscriptionClosed, err)
// Register another subscription.
subscription2 := &stream.SubscribeRequest{
Topic: topicService,
Key: "nope",
Token: token.SecretID,
}
sub2, err := publisher.Subscribe(subscription2)
require.NoError(err)
defer sub2.Unsubscribe()
eventCh2 := testRunSub(sub2)
// Expect initial EoS
e = assertEvent(t, eventCh2)
require.True(e.IsEndOfSnapshot())
// Delete the unrelated token.
require.NoError(s.ACLTokenDeleteByAccessor(5, token2.AccessorID, nil))
// Ensure there's no reset event.
assertNoEvent(t, eventCh2)
// Delete the token used by the subscriber.
require.NoError(s.ACLTokenDeleteByAccessor(6, token.AccessorID, nil))
// Ensure the reset event was sent.
err = assertErr(t, eventCh2)
require.Equal(stream.ErrSubscriptionClosed, err)
}
func TestStore_IntegrationWithEventPublisher_ACLPolicyUpdate(t *testing.T) {
t.Parallel()
require := require.New(t)
s := testACLTokensStateStore(t)
// Create token and wait for good state
token := createTokenAndWaitForACLEventPublish(t, s)
// Register the subscription.
subscription := &stream.SubscribeRequest{
Topic: topicService,
Key: "nope",
Token: token.SecretID,
}
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
publisher := stream.NewEventPublisher(ctx, newTestSnapshotHandlers(s), 0)
s.db.publisher = publisher
sub, err := publisher.Subscribe(subscription)
require.NoError(err)
defer sub.Unsubscribe()
eventCh := testRunSub(sub)
// Ignore the end of snapshot event
e := assertEvent(t, eventCh)
require.True(e.IsEndOfSnapshot(), "event should be a EoS got %v", e)
// Update an unrelated policy.
policy2 := structs.ACLPolicy{
ID: testPolicyID_C,
Name: "foo-read",
Rules: `node "foo" { policy = "read" }`,
Syntax: acl.SyntaxCurrent,
Datacenters: []string{"dc1"},
}
policy2.SetHash(false)
require.NoError(s.ACLPolicySet(3, &policy2))
// Ensure there's no reset event.
assertNoEvent(t, eventCh)
// Now update the policy used in the subscriber.
policy3 := structs.ACLPolicy{
ID: testPolicyID_A,
Name: "node-read",
Rules: `node_prefix "" { policy = "write" }`,
Syntax: acl.SyntaxCurrent,
Datacenters: []string{"dc1"},
}
policy3.SetHash(false)
require.NoError(s.ACLPolicySet(4, &policy3))
// Ensure the reset event was sent.
assertReset(t, eventCh, true)
// Register another subscription.
subscription2 := &stream.SubscribeRequest{
Topic: topicService,
Key: "nope",
Token: token.SecretID,
}
sub, err = publisher.Subscribe(subscription2)
require.NoError(err)
eventCh = testRunSub(sub)
// Ignore the end of snapshot event
e = assertEvent(t, eventCh)
require.True(e.IsEndOfSnapshot(), "event should be a EoS got %v", e)
// Delete the unrelated policy.
require.NoError(s.ACLPolicyDeleteByID(5, testPolicyID_C, nil))
// Ensure there's no reload event.
assertNoEvent(t, eventCh)
// Delete the policy used by the subscriber.
require.NoError(s.ACLPolicyDeleteByID(6, testPolicyID_A, nil))
// Ensure the reload event was sent.
err = assertErr(t, eventCh)
require.Equal(stream.ErrSubscriptionClosed, err)
// Register another subscription.
subscription3 := &stream.SubscribeRequest{
Topic: topicService,
Key: "nope",
Token: token.SecretID,
}
sub, err = publisher.Subscribe(subscription3)
require.NoError(err)
defer sub.Unsubscribe()
eventCh = testRunSub(sub)
// Ignore the end of snapshot event
e = assertEvent(t, eventCh)
require.True(e.IsEndOfSnapshot(), "event should be a EoS got %v", e)
// Now update the policy used in role B, but not directly in the token.
policy4 := structs.ACLPolicy{
ID: testPolicyID_B,
Name: "node-read",
Rules: `node_prefix "foo" { policy = "read" }`,
Syntax: acl.SyntaxCurrent,
Datacenters: []string{"dc1"},
}
policy4.SetHash(false)
require.NoError(s.ACLPolicySet(7, &policy4))
// Ensure the reset event was sent.
assertReset(t, eventCh, true)
}
func TestStore_IntegrationWithEventPublisher_ACLRoleUpdate(t *testing.T) {
t.Parallel()
require := require.New(t)
s := testACLTokensStateStore(t)
// Create token and wait for good state
token := createTokenAndWaitForACLEventPublish(t, s)
// Register the subscription.
subscription := &stream.SubscribeRequest{
Topic: topicService,
Key: "nope",
Token: token.SecretID,
}
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
publisher := stream.NewEventPublisher(ctx, newTestSnapshotHandlers(s), 0)
s.db.publisher = publisher
sub, err := publisher.Subscribe(subscription)
require.NoError(err)
eventCh := testRunSub(sub)
// Stream should get EndOfSnapshot
e := assertEvent(t, eventCh)
require.True(e.IsEndOfSnapshot())
// Update an unrelated role (the token has role testRoleID_B).
role := structs.ACLRole{
ID: testRoleID_A,
Name: "unrelated-role",
Description: "test",
}
role.SetHash(false)
require.NoError(s.ACLRoleSet(3, &role))
// Ensure there's no reload event.
assertNoEvent(t, eventCh)
// Now update the role used by the token in the subscriber.
role2 := structs.ACLRole{
ID: testRoleID_B,
Name: "my-new-role",
Description: "changed",
}
role2.SetHash(false)
require.NoError(s.ACLRoleSet(4, &role2))
// Ensure the reload event was sent.
assertReset(t, eventCh, false)
// Register another subscription.
subscription2 := &stream.SubscribeRequest{
Topic: topicService,
Key: "nope",
Token: token.SecretID,
}
sub, err = publisher.Subscribe(subscription2)
require.NoError(err)
eventCh = testRunSub(sub)
// Ignore the end of snapshot event
e = assertEvent(t, eventCh)
require.True(e.IsEndOfSnapshot(), "event should be a EoS got %v", e)
// Delete the unrelated policy.
require.NoError(s.ACLRoleDeleteByID(5, testRoleID_A, nil))
// Ensure there's no reload event.
assertNoEvent(t, eventCh)
// Delete the policy used by the subscriber.
require.NoError(s.ACLRoleDeleteByID(6, testRoleID_B, nil))
// Ensure the reload event was sent.
assertReset(t, eventCh, false)
}
type nextResult struct {
Events []stream.Event
Err error
}
func testRunSub(sub *stream.Subscription) <-chan nextResult {
eventCh := make(chan nextResult, 1)
go func() {
for {
es, err := sub.Next(context.TODO())
eventCh <- nextResult{
Events: es,
Err: err,
}
if err != nil {
return
}
}
}()
return eventCh
}
func assertNoEvent(t *testing.T, eventCh <-chan nextResult) {
t.Helper()
select {
case next := <-eventCh:
require.NoError(t, next.Err)
require.Len(t, next.Events, 1)
t.Fatalf("got unwanted event: %#v", next.Events[0].Payload)
case <-time.After(100 * time.Millisecond):
}
}
func assertEvent(t *testing.T, eventCh <-chan nextResult) *stream.Event {
t.Helper()
select {
case next := <-eventCh:
require.NoError(t, next.Err)
require.Len(t, next.Events, 1)
return &next.Events[0]
case <-time.After(100 * time.Millisecond):
t.Fatalf("no event after 100ms")
}
return nil
}
func assertErr(t *testing.T, eventCh <-chan nextResult) error {
t.Helper()
select {
case next := <-eventCh:
require.Error(t, next.Err)
return next.Err
case <-time.After(100 * time.Millisecond):
t.Fatalf("no err after 100ms")
}
return nil
}
// assertReset checks that a ResetStream event is send to the subscription
// within 100ms. If allowEOS is true it will ignore any intermediate events that
// come before the reset provided they are EndOfSnapshot events because in many
// cases it's non-deterministic whether the snapshot will complete before the
// acl reset is handled.
func assertReset(t *testing.T, eventCh <-chan nextResult, allowEOS bool) {
t.Helper()
for {
select {
case next := <-eventCh:
if allowEOS {
if next.Err == nil && len(next.Events) == 1 && next.Events[0].IsEndOfSnapshot() {
continue
}
}
require.Error(t, next.Err)
require.Equal(t, stream.ErrSubscriptionClosed, next.Err)
return
case <-time.After(100 * time.Millisecond):
t.Fatalf("no err after 100ms")
}
}
}
var topicService stream.Topic = topic("test-topic-service")
func newTestSnapshotHandlers(s *Store) stream.SnapshotHandlers {
return stream.SnapshotHandlers{
topicService: func(req *stream.SubscribeRequest, snap stream.SnapshotAppender) (uint64, error) {
idx, nodes, err := s.ServiceNodes(nil, req.Key, nil)
if err != nil {
return idx, err
}
for _, node := range nodes {
event := stream.Event{
Topic: req.Topic,
Key: req.Key,
Index: node.ModifyIndex,
Payload: node,
}
snap.Append([]stream.Event{event})
}
return idx, nil
},
}
}
func createTokenAndWaitForACLEventPublish(t *testing.T, s *Store) *structs.ACLToken {
token := &structs.ACLToken{
AccessorID: "3af117a9-2233-4cf4-8ff8-3c749c9906b4",
SecretID: "4268ce0d-d7ae-4718-8613-42eba9036020",
Description: "something",
Policies: []structs.ACLTokenPolicyLink{
{ID: testPolicyID_A},
},
Roles: []structs.ACLTokenRoleLink{
{ID: testRoleID_B},
},
}
token.SetHash(false)
// If we subscribe immediately after we create a token we race with the
// publisher that is publishing the ACL token event for the token we just
// created. That means that the subscription we create right after will often
// be immediately reset. The most reliable way to avoid that without just
// sleeping for some arbitrary time is to pre-subscribe using the token before
// it actually exists (which works because the publisher doesn't check tokens
// it assumes something lower down did that) and then wait for it to be reset
// so we know the initial token write event has been sent out before
// continuing...
req := &stream.SubscribeRequest{
Topic: topicService,
Key: "nope",
Token: token.SecretID,
}
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
publisher := stream.NewEventPublisher(ctx, newTestSnapshotHandlers(s), 0)
s.db.publisher = publisher
sub, err := publisher.Subscribe(req)
require.NoError(t, err)
defer sub.Unsubscribe()
eventCh := testRunSub(sub)
// Create the ACL token to be used in the subscription.
require.NoError(t, s.ACLTokenSet(2, token.Clone(), false))
// Wait for the pre-subscription to be reset
assertReset(t, eventCh, true)
return token
}