Name Resolution/Connect Failure After Adding a Server about nuraft

[greensky00]

Hi @marcusolini

There is no way to make "add server" synchronous. Instead, it is possible to provide an API to attach your custom resolver to NuRaft so that you can return the IP address from the given host. Does it make sense to you?

[marcusolini]

Hi @greensky00

Sure, using a custom resolver sounds like a good approach. How do you suggest we integrate a custom resolver?

[greensky00]

You can assign your callback in asio_service_options, and that callback function will look like:

void custom_resolver(const std::string& host, 
                     const std::string& port, 
                     const resolver_resp& when_done) {
    // do IP address lookup..
    when_done( resolved_ip_address, port );
}

Such a callback will be an asynchronous task so that you can call when_done in a different thread. Let me work on it shortly.