I don't see any obvious problems with your setup. However, the version of gRPC that you're using is extremely old -- version 1.30 was released in June 2020, almost 5 years ago. Please try upgrading to a current version and see if that works. If not, we can have a closer look.
On Tue, Jan 21, 2025 at 6:57 AM Gaby Banu <[email protected]> wrote: > *Problem Description:* > > I am trying to configure the round_robin load balancing policy using a > Service Config provided via DNS, as outlined in the > A2-service-configs-in-dns.md > <https://github.com/grpc/proposal/blob/master/A2-service-configs-in-dns.md>. > However, I do not observe any DNS TXT record queries in the client logs, > and the load balancing policy remains set to pick_first. > ------------------------------ > > *Additional Details:* > > 1. *Environment:* > - The gRPC client *(grpc-c++/1.30.3 grpc-c/10.0.0 (linux; chttp2)*) > is configured with the following service URI: > > <streaming-recognition > service-uri="dns:///aiml-pool.dev.orange.intra:50051" /> > > 2. *DNS Setup:* > - The DNS record is configured as follows: > > $ nslookup -type=TXT _grpc_config.aiml-pool.dev.orange.intraServer: > 62.217.251.212Address: 62.217.251.212#53 Non-authoritative > answer:_grpc_config.aiml-pool.dev.orange.intra > text = > "grpc_config=[{\"serviceConfig\":{\"loadBalancingPolicy\":\"round_robin\",\"methodConfig\":[{\"name\":[{\"service\":\"VoicebotService\",\"method\":\"recognize\"}],\"waitForReady\":true}]}}]" > > 3. *Client Logs:* > - Enabling DEBUG level logs shows queries for A and AAAA records, > but no queries for TXT records (entire log file is attached): > > [DEBUG] Load Streaming Recognition Attribute: service-uri = > dns:///aiml-pool.dev.orange.intra:50051[DEBUG] Using ares dns resolver[DEBUG] > (c-ares resolver) request:0x7f6714037610 create_hostbyname_request_locked > host:aiml-pool.dev.orange.intra port:33731 is_balancer:0 qtype:AAAA[DEBUG] > (c-ares resolver) request:0x7f6714037610 create_hostbyname_request_locked > host:aiml-pool.dev.orange.intra port:33731 is_balancer:0 qtype:A[DEBUG] > (c-ares resolver) request:0x7f7bf8037610 on_hostbyname_done_locked qtype=A > host=aiml-pool.dev.orange.intra ARES_SUCCESS[DEBUG] (c-ares resolver) > request:0x7f7bf8037610 c-ares resolver gets a AF_INET result:[DEBUG] > (c-ares resolver) request:0x7f7bf8037610 c-ares resolver gets a AF_INET > result:[INFO] [child_policy_handler 0x7f7bd4001ea0] created new LB > policy "pick_first" (0x7f7bf80253f0) > > 4. *Expected Behavior:* > - The client should query the TXT record > _grpc_config.aiml-pool.dev.orange.intra to retrieve the > ServiceConfig and apply the round_robin policy. > > ------------------------------ > > *Questions:* > > 1. Is there a specific configuration required to enable the client to > query TXT records for the Service Config? > 2. Could there be a limitation or bug in the C gRPC client > implementation that prevents it from querying TXT records? > > Thank you for your assistance! > > > > Best regards, > > Gabriel Banu > > -- > You received this message because you are subscribed to the Google Groups " > grpc.io" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/grpc-io/c09b0708-0f0d-4eb0-b894-a0357a186f71n%40googlegroups.com > <https://groups.google.com/d/msgid/grpc-io/c09b0708-0f0d-4eb0-b894-a0357a186f71n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- Mark D. Roth <[email protected]> Software Engineer Google, Inc. -- You received this message because you are subscribed to the Google Groups "grpc.io" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/grpc-io/CAJgPXp5%3D8kCk0heVhK-EM12TuMDuGwy1YRPEJVNJzZyHo1Ku1A%40mail.gmail.com.
