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30 lines
1.0 KiB
Markdown
30 lines
1.0 KiB
Markdown
# Dualstack
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The dualstack example uses a custom name resolver that provides both IPv4 and
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IPv6 localhost endpoints for each of 3 server instances. The client will first
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use the default name resolver and load balancers which will only connect to the
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first server. It will then use the custom name resolver with round robin to
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connect to each of the servers in turn. The 3 instances of the server will bind
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respectively to: both IPv4 and IPv6, IPv4 only, and IPv6 only.
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Three servers are serving on the following loopback addresses:
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1. `[::]:50052`: Listening on both IPv4 and IPv6 loopback addresses.
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1. `127.0.0.1:50050`: Listening only on the IPv4 loopback address.
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1. `[::1]:50051`: Listening only on the IPv6 loopback address.
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The server response will include its serving port and address type (IPv4, IPv6
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or both). So the server on "127.0.0.1:50050" will reply to the RPC with the
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following message: `Greeting:Hello request:1 from server<50052> type: IPv4
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only)`.
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## Try it
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```sh
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go run server/main.go
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```
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```sh
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go run client/main.go
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```
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