Add dns discovery

MouseHatGames · Feb 22, 2024 · 05fb016 · 05fb016
1 parent 2a25e5c
commit 05fb016
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diff --git a/discovery/dns/dns.go b/discovery/dns/dns.go
@@ -0,0 +1,31 @@
+package dns
+
+import (
+	"fmt"
+	"net"
+
+	"github.com/MouseHatGames/mice/options"
+)
+
+type dnsDiscovery struct {
+}
+
+func Discovery() options.Option {
+	return func(o *options.Options) {
+		o.Discovery = &dnsDiscovery{}
+	}
+}
+
+func (d *dnsDiscovery) Find(svc string) (host string, err error) {
+	ips, err := net.LookupIP(svc)
+	if err != nil {
+		return "", fmt.Errorf("lookup host: %w", err)
+	}
+
+	if len(ips) == 1 {
+		return ips[0].String(), nil
+	}
+
+	//TODO: Use a selection algorithm
+	return "", fmt.Errorf("more than one ip found")
+}
diff --git a/discovery/dns/go.mod b/discovery/dns/go.mod
@@ -0,0 +1,5 @@
+module github.com/MouseHatGames/mice-plugins/discovery/dns
+
+go 1.21.5
+
+require github.com/MouseHatGames/mice v1.2.8
diff --git a/discovery/dns/go.sum b/discovery/dns/go.sum
@@ -0,0 +1,8 @@
+github.com/MouseHatGames/mice v1.2.8 h1:3Gsj8VjVuuDsLuum3oMeBjYcxbV8OhaQ6hd6aDqbJww=
+github.com/MouseHatGames/mice v1.2.8/go.mod h1:Zml0bIiLnFoNEylVWSEsnpscvXmSMnR9jqr/aYh/jNw=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=