Return mesh gateway addrs if peering through mgw #14694
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freddygv
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| @@ -150,7 +150,6 @@ func (m *CertManager) watchServerToken(ctx context.Context) { | |||
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| // Cancel existing the leaf cert watch and spin up new one any time the server token changes. | |||
| // The watch needs the current token as set by the leader since certificate signing requests go to the leader. | |||
| fmt.Println("canceling and resetting") | |||
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Stray print from a previous PR
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| if err := waiter.Wait(ctx); err != nil && !errors.Is(err, context.Canceled) && !errors.Is(err, context.DeadlineExceeded) { |
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Collapsed this error handling with the ctx.Done() check below, since waiter.Wait can let us know if the context was canceled
| } else { | ||
| // Block for any changes to the state store. | ||
| updateCh <- cache.UpdateEvent{ |
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This seemed like it could block forever if the peering is deleted, so now there's a check for context cancelation.
| if state.exportList != nil { | ||
| // Trigger public events for all synthetic discovery chain replies. | ||
| for chainName, info := range state.connectServices { | ||
| m.emitEventForDiscoveryChain(ctx, state, pending, chainName, info) |
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Renamed for clarity since this method doesn't actually emit the events
| @@ -49,18 +50,10 @@ func TestSubscriptionManager_RegisterDeregister(t *testing.T) { | |||
| subCh := mgr.subscribe(ctx, id, "my-peering", partition) | |||
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| var ( | |||
| gatewayCorrID = subMeshGateway + partition | |||
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Some of these test changes follow from not directly exporting mesh gateway instances
| if len(serverAddrs) == 0 { | ||
| m.logger.Warn("did not find any server addresses with external gRPC ports to publish") | ||
| continue | ||
| } | ||
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| updateCh <- cache.UpdateEvent{ |
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Again changed to consider context cancellation to avoid potentially blocking forever
| @@ -239,16 +243,10 @@ func (m *subscriptionManager) handleEvent(ctx context.Context, state *subscripti | |||
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| pending := &pendingPayload{} | |||
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| // Directly replicate information about our mesh gateways to the consuming side. | |||
| // TODO(peering): should we scrub anything before replicating this? | |||
| if err := pending.Add(meshGatewayPayloadID, u.CorrelationID, csn); err != nil { | |||
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We were never actually sent these to the peer, the handler for these is a no-op in stream_resources.go. That case statement has been removed now as well.
agent/grpc-external/services/peerstream/subscription_manager.go
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| } else if err != nil { | ||
| logger.Error("failed to wait before re-trying sync", "error", err) |
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waiter.Wait only returns context errors; we could remove this branch since I don't think there's any reason for a waiter function to return anything else
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I added a comment to make that contract explicit, though I don't love that callers rely on that behavior
This commit adds handling so that the replication stream considers whether the user intends to peer through mesh gateways. The subscription will return server or mesh gateway addresses depending on the mesh configuration setting. These watches can be updated at runtime by modifying the mesh config entry.
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Description
Exposing servers through mesh gateways will involve sharing mesh gateway addresses with peers instead of true server addresses.
There are two flows where these addresses are shared:
Each flow was addressed in a separate commit.
Testing & Reproduction steps
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