deploy, cmd/gomoteserver: add the Kubernetes configuration

This change adds the Kubernetes configuration changes necessary
for the gomote server to be deployed in the cluster. It creates
a new ingress for the gomote server. It also adds an external
IP address for the gomote ssh functionality.

Updates golang/go#61912
For golang/go#61772

Change-Id: If821ff368bbd025a566b04f2d9779f2a12ff4cb2
Reviewed-on: https://go-review.googlesource.com/c/build/+/520695
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Carlos Amedee <carlos@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

cmd/gomoteserver/deployment-prod.yaml

@@ -0,0 +1,98 @@
+# Copyright 2023 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  namespace: prod
+  name: gomoteserver-deployment
+spec:
+  selector:
+    matchLabels:
+      app: gomoteserver
+  template:
+    metadata:
+      labels:
+        app: gomoteserver
+    spec:
+      serviceAccountName: gomoteserver
+      containers:
+      - name: gomoteserver
+        image: gcr.io/symbolic-datum-552/gomoteserver:latest
+        imagePullPolicy: Always
+        command: ["/gomoteserver", "-listen-http=:80", "-autocert-bucket=gomote-golang-org-autocert-cache", "-listen-https-selfsigned=:444"]
+        ports:
+        - containerPort: 80
+        - containerPort: 444
+        - containerPort: 2222 # ssh proxy port
+        resources:
+          requests:
+            cpu: "2"
+            memory: "16Gi"
+          limits:
+            cpu: "4"
+            memory: "16Gi"
+---
+apiVersion: v1
+kind: Service
+metadata:
+  namespace: prod
+  name: gomoteserver
+spec:
+  ports:
+    - port: 2222
+      targetPort: 2222
+      name: ssh
+  selector:
+    app: gomoteserver
+  type: LoadBalancer
+  loadBalancerIP: 35.232.178.214 # gomote-ssh-golang-org
+  externalTrafficPolicy: Local
+---
+apiVersion: v1
+kind: Service
+metadata:
+  namespace: prod
+  name: gomoteserver-internal-iap
+  annotations:
+    cloud.google.com/backend-config: '{"default": "gomoteserver-iap-backend"}'
+    cloud.google.com/neg: '{"ingress": false}'
+    cloud.google.com/app-protocols: '{"https":"HTTP2"}'
+spec:
+  ports:
+    - port: 444
+      targetPort: 444
+      name: https
+  selector:
+    app: gomoteserver
+  type: NodePort
+---
+apiVersion: v1
+kind: Service
+metadata:
+  namespace: prod
+  name: gomoteserver-internal
+  annotations:
+    cloud.google.com/neg: '{"ingress": false}'
+    cloud.google.com/app-protocols: '{"https":"HTTP2"}'
+spec:
+  ports:
+    - port: 444
+      targetPort: 444
+      name: https
+  selector:
+    app: gomoteserver
+  type: NodePort
+---
+apiVersion: cloud.google.com/v1
+kind: BackendConfig
+metadata:
+  namespace: prod
+  name: gomoteserver-iap-backend
+spec:
+  iap:
+    enabled: true
+    oauthclientCredentials:
+      secretName: iap-oauth
+  timeoutSec: 86400  # For long-running gomote RPCs. See https://go.dev/issue/56423.

deploy/gomote-ingress.yaml

@@ -0,0 +1,52 @@
+# Copyright 2023 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  namespace: prod
+  name: gomoteserver-ingress
+  annotations:
+    kubernetes.io/ingress.global-static-ip-name: gomote-web-golang-org
+    networking.gke.io/managed-certificates: gomoteserver-cert
+    kubernetes.io/ingress.class: "gce"
+    networking.gke.io/v1beta1.FrontendConfig: gomoteserver-ingress-frontend
+spec:
+  rules:
+  - host: gomote.golang.org
+    http:
+      paths:
+      - pathType: ImplementationSpecific
+        path: /protos.GomoteService/*
+        backend:
+          service:
+            name: gomoteserver-internal-iap
+            port:
+              number: 444
+      - pathType: ImplementationSpecific
+        path: /*
+        backend:
+          service:
+            name: gomoteserver-internal
+            port:
+              number: 444
+---
+apiVersion: networking.gke.io/v1beta1
+kind: FrontendConfig
+metadata:
+  namespace: prod
+  name: gomoteserver-ingress-frontend
+spec:
+  redirectToHttps:
+    enabled: true
+    responseCodeName: FOUND
+---
+apiVersion: networking.gke.io/v1
+kind: ManagedCertificate
+metadata:
+  namespace: prod
+  name: gomoteserver-cert
+spec:
+  domains:
+    - gomote.golang.org