Depending on which language you're using, you could use the custom name resolver interface <https://grpc.io/docs/guides/custom-name-resolution/> to implement this behavior yourself. On Wednesday, July 5, 2023 at 12:53:43 PM UTC-7 Gmail wrote:
> Thanks Frederic > I understand that. But I only want to do it when grpc has a connection > failure. Is there an already existing mechanism to do that.? > > On Jul 5, 2023, at 12:37 PM, Frédéric Martinsons <frederic....@gmail.com> > wrote: > > > > I think this is totally unrelated to grpc but for what it worth, if you > control your dnsmasq, you can use --clear-on-reload option and send a > SIGHUP to dnsmasq process to reload the cache. > > Le mer. 5 juil. 2023, 21:24, Ramanujam Jagannath <jag...@gmail.com> a > écrit : > >> Backgrounder - Our device connects to an AWS static IP. We use dnsmasq on >> device to provide lookup services for downstream devices. Currently we are >> planning to use a long. DNS TTL on AWS to avoid too many DNS lookups from >> on field devices. The on-field devices use a grpc connection to maintain >> long standing tcp connections. We do have multiple availability zones and >> so a DNS resolution does return 4 IP addresses >> >> Problem - When an IP address fails(on AWS) the grpc client will retry and >> re-resolve. But because we have dnsmasq on device it will send a cached >> address - which is potentially faulty. >> >> Solution - This can be resolved by flushing the dnsmasq cache on device. >> But is there a way to flush the dnsmasq cache on device on connection >> failure only? grpc under the hood uses c-ares which in our case goes to the >> dnsmasq proxy on device. >> >> Any solutions/thoughts. Someone must have encountered this problem before? >> >> -- >> 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 grpc-io+u...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/grpc-io/75d68762-eb58-4400-b8e1-3584f6bd6e51n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/grpc-io/75d68762-eb58-4400-b8e1-3584f6bd6e51n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- 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 grpc-io+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/90825f02-6699-4f3a-8b77-3c9b7844c20dn%40googlegroups.com.
