cluster/kube/lib/nginx: add gerrit forwarding

This is already running in production since gerrit was deployed - it
just got lost during submit.

Change-Id: I8a1580b1ca3ec3142a8fa4320dc9f51a599a914f
diff --git a/cluster/kube/lib/nginx.libsonnet b/cluster/kube/lib/nginx.libsonnet
index a6d10f1..a871b96 100644
--- a/cluster/kube/lib/nginx.libsonnet
+++ b/cluster/kube/lib/nginx.libsonnet
@@ -26,7 +26,11 @@
                 metadata+: env.metadata,
             },
             configuration: env.maps.make("nginx-configuration"),
-            tcp: env.maps.make("tcp-services"),
+            tcp: env.maps.make("tcp-services") {
+                data: {
+                    "22": "gerrit/gerrit:22"
+                }
+            },
             udp: env.maps.make("udp-services"),
         },
 
@@ -139,6 +143,7 @@
             spec+: {
                 type: "LoadBalancer",
                 ports: [
+                    { name: "ssh", port: 22, targetPort: 22, protocol: "TCP" },
                     { name: "http", port: 80, targetPort: 80, protocol: "TCP" },
                     { name: "https", port: 443, targetPort: 443, protocol: "TCP" },
                 ],