Configure bind address

[xaqq]

Hello,

I would like to be able to bind my gRPC on a dedicated interface.
It seems this is not possible:

• This starter's configuration exposes only a port not an address.
• Extending GRpcServerBuilderConfigurer gives access to an already created NettyServerBuilder
  and therefore the address property cannot be changed.

I am new to Spring and to this gRPC starter, so I'm wondering if maybe I have missed something obvious?
The current workaround would be to let the app bind on 0.0.0.0 and rely on a properly configured firewall. I would rather have the app bind to the expected interface.

Thanks,

[jvmlet]

You are right, it's missing. Will add this tomorrow

[jvmlet]

Hi @xaqq
Unfortunately, the grpc doens't have generic API for all providers to specify the address. It means I will need to expose properties per provider for autoconfiguration.. it will take a while, sorry.

[xaqq]

Hello @jvmlet

Thank you for confirming my issue.
I will try and see if I manage to find an "in-app" workaround until a proper solution is available.

[xaqq]

So I went ahead and forked the project to try to implement (partially) this feature.

You can see the commit here https://github.com/xaqq/grpc-spring-boot-starter/tree/netty-bind-addr

It's limited and apply to Netty only, but this seems to work. I'm not too sure about the order in which the bean are evaluated and if maybe the enabled property, when set to true, could conflict with the nettyBindAddress property.

I noticed the ServerBuilder.forPort() method but there is no forAddress() and I don't know what the ServerProvider is. This is why i've scoped my changed to netty only.

[jvmlet]

Your implementation looks OK, I'll add this functionality to be customizable by all users (OKHttp,Netty and inprocess)

[sshort]

Hi,

what's the state of this, please? I was thinking of adding this myself.

Thanks
Steve

[jvmlet]

Grpc has its own way to pick up the server builder implementation by using SPI. Need to think how NOT to break this functionality when implementing this feature

[ggongit]

Hey @jvmlet , Could you please let me know if you have any further updates on it as I am looking for binding my grpc server services on loopback address (127.0.0.1) and I do not see any way to achieve it.
Thanks.

[jvmlet]

I'm collecting feature requests for the upcoming versions. This one will be in the list.

[jvmlet]

It's better later than never ;-)