Fix udp service access through k3d-proxy

This commit separates PORTS and UDP_PORTS and configures
nginx appropriately.

Signed-off-by: Dinar Valeev <dinar.valeev@absa.africa>

go.sum

@@ -48,6 +48,7 @@ github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRF
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 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
+github.com/aws/aws-sdk-go v1.15.11 h1:m45+Ru/wA+73cOZXiEGLDH2d9uLN3iHqMc0/z4noDXE=
 github.com/aws/aws-sdk-go v1.15.11/go.mod h1:mFuSZ37Z9YOHbQEwBWztmVzqXrEkub65tZoCYDt7FT0=
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@@ -97,7 +98,9 @@ github.com/containerd/typeurl v0.0.0-20180627222232-a93fcdb778cd/go.mod h1:Cm3kw
 github.com/containerd/typeurl v1.0.1 h1:PvuK4E3D5S5q6IqsPDCy928FhP0LUIGcmZ/Yhgp5Djw=
 github.com/containerd/typeurl v1.0.1/go.mod h1:TB1hUtrpaiO88KEK56ijojHS1+NeF0izUACaJW2mdXg=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
+github.com/coreos/etcd v3.3.13+incompatible h1:8F3hqu9fGYLBifCmRCJsicFqDx/D68Rt3q1JMazcgBQ=
 github.com/coreos/etcd v3.3.13+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/go-semver v0.3.0 h1:wkHLiw0WNATZnSG7epLsujiMCgPAc9xhjJ4tgnAxmfM=
 github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e h1:Wf6HqHfScWJN9/ZjdUKyjop4mf3Qdd+1TvvltAvM3m8=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
@@ -266,16 +269,22 @@ github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7/go.mod h1:Fecb
 github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
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 github.com/grpc-ecosystem/grpc-gateway v1.9.0/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
+github.com/hashicorp/consul/api v1.1.0 h1:BNQPM9ytxj6jbjjdRPioQ94T6YXriSopn0i8COv6SRA=
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+github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/UYA=
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+github.com/hashicorp/go-cleanhttp v0.5.1 h1:dH3aiDG9Jvb5r5+bYHsikaOUIpcM0xvgMXVoDkXMzJM=
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+github.com/hashicorp/go-sockaddr v1.0.0 h1:GeH6tui99pF4NJgfnhp+L6+FfobzVW3Ah46sLo0ICXs=
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@@ -301,6 +310,7 @@ github.com/imdario/mergo v0.3.9/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJ
 github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
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+github.com/jmespath/go-jmespath v0.0.0-20160803190731-bd40a432e4c7 h1:SMvOWPJCES2GdFracYbBQh93GXac8fq7HeN6JnpduB8=
 github.com/jmespath/go-jmespath v0.0.0-20160803190731-bd40a432e4c7/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
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 github.com/json-iterator/go v0.0.0-20180612202835-f2b4162afba3/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
@@ -441,6 +451,7 @@ github.com/rogpeppe/go-internal v1.3.0 h1:RR9dF3JtopPvtkroDZuVD7qquD0bnHlKSqaQhg
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
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+github.com/ryanuber/go-glob v0.0.0-20170128012129-256dc444b735 h1:7YvPJVmEeFHR1Tj9sZEYsmarJEQfMVYpd/Vyy/A8dqE=
 github.com/ryanuber/go-glob v0.0.0-20170128012129-256dc444b735/go.mod h1:807d1WSdnB0XRJzKNil9Om6lcp/3a0v4qIHxIXzX/Yc=
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 github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg65j358z/aeFdxmN0P9QXhEzd20vsDc=

pkg/client/cluster.go

@@ -501,9 +501,14 @@ ClusterCreatOpts:
 		}
 
 		// generate comma-separated list of extra ports to forward
-		ports := k3d.DefaultAPIPort
+		ports := []string{k3d.DefaultAPIPort}
+		var udp_ports []string
 		for exposedPort := range cluster.ServerLoadBalancer.Ports {
-			ports += "," + exposedPort.Port()
+			if exposedPort.Proto() == "udp" {
+				udp_ports = append(udp_ports, exposedPort.Port())
+				continue
+			}
+			ports = append(ports, exposedPort.Port())
 		}
 
 		if cluster.ServerLoadBalancer.Ports == nil {
@@ -518,14 +523,17 @@ ClusterCreatOpts:
 			Ports: cluster.ServerLoadBalancer.Ports,
 			Env: []string{
 				fmt.Sprintf("SERVERS=%s", servers),
-				fmt.Sprintf("PORTS=%s", ports),
-				fmt.Sprintf("WORKER_PROCESSES=%d", len(strings.Split(ports, ","))),
+				fmt.Sprintf("PORTS=%s", strings.Join(ports, ",")),
+				fmt.Sprintf("WORKER_PROCESSES=%d", len(ports)),
 			},
 			Role:     k3d.LoadBalancerRole,
 			Labels:   clusterCreateOpts.GlobalLabels, // TODO: createLoadBalancer: add more expressive labels
 			Networks: []string{cluster.Network.Name},
 			Restart:  true,
 		}
+		if len(udp_ports) > 0 {
+			lbNode.Env = append(lbNode.Env, fmt.Sprintf("UDP_PORTS=%s", strings.Join(udp_ports, ",")))
+		}
 		cluster.Nodes = append(cluster.Nodes, lbNode) // append lbNode to list of cluster nodes, so it will be considered during rollback
 		log.Infof("Creating LoadBalancer '%s'", lbNode.Name)
 		if err := NodeCreate(clusterCreateCtx, runtime, lbNode, k3d.NodeCreateOpts{}); err != nil {

proxy/conf.d/nginx.toml

@@ -4,4 +4,4 @@ dest = "/etc/nginx/nginx.conf"
 keys = [
     "SERVERS",
     "PORTS",
-]
+]

proxy/templates/nginx.tmpl

@@ -1,5 +1,6 @@
 {{- $servers := split (getenv "SERVERS") "," -}}
 {{- $ports := split (getenv "PORTS") "," -}}
+{{- $udp_ports := split (getenv "UDP_PORTS") "," -}}
 error_log stderr notice;
 
 worker_processes auto;
@@ -24,4 +25,20 @@ stream {
     proxy_connect_timeout 2s;
   }
   {{- end }}
-}
+  {{- range $port := $udp_ports }}
+  {{- if $port }}
+  upstream server_nodes_{{ $port }} {
+    {{- range $server := $servers }}
+    server {{ $server }}:{{ $port }} max_fails=1 fail_timeout=10s;
+    {{- end }}
+  }
+
+  server {
+    listen        {{ $port }} udp;
+    proxy_pass    server_nodes_{{ $port }};
+    proxy_timeout 600;
+    proxy_connect_timeout 2s;
+  }
+  {{- end }}
+  {{- end }}
+}