WIP enable gateway discovery in db mode

config/variants/multi-gw-postgres/base/gateway_admin_service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: kong-admin
+  namespace: kong
+spec:
+  clusterIP: "None"
+  selector:
+    app: proxy-kong
+  ports:
+  - name: admin
+    port: 8444
+    targetPort: 8444
+    protocol: TCP

config/variants/multi-gw-postgres/base/gateway_deployment.yaml

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+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: proxy-kong
+  name: proxy-kong
+  namespace: kong
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: proxy-kong
+  template:
+    metadata:
+      annotations:
+        traffic.sidecar.istio.io/includeInboundPorts: ""
+        kuma.io/gateway: enabled
+        kuma.io/service-account-token-volume: kong-serviceaccount-token
+      labels:
+        app: proxy-kong
+    spec:
+      serviceAccountName: kong-serviceaccount
+      automountServiceAccountToken: false
+      volumes:
+      - name: kong-serviceaccount-token
+        projected:
+          sources:
+            - serviceAccountToken:
+                expirationSeconds: 3607
+                path: token
+            - configMap:
+                name: kube-root-ca.crt
+                items:
+                  - key: ca.crt
+                    path: ca.crt
+            - downwardAPI:
+                items:
+                  - fieldRef:
+                      apiVersion: v1
+                      fieldPath: metadata.namespace
+                    path: namespace
+      containers:
+      - name: proxy
+        image: kong-placeholder:placeholder # This is replaced by the config/image.yaml component
+        env:
+          # servers
+        - name: KONG_PROXY_LISTEN
+          value: 0.0.0.0:8000 reuseport backlog=16384, 0.0.0.0:8443 http2 ssl reuseport backlog=16384
+        - name: KONG_PORT_MAPS
+          value: "80:8000, 443:8443"
+        - name: KONG_ADMIN_LISTEN
+          value: 0.0.0.0:8444 http2 ssl reuseport backlog=16384
+        - name: KONG_STATUS_LISTEN
+          value: 0.0.0.0:8100
+          # DB
+        - name: KONG_DATABASE
+          value: "postgres"
+        - name: KONG_PG_HOST
+          value: postgres
+        - name: KONG_PG_PASSWORD
+          value: kong
+          # runtime tweaks
+        - name: KONG_NGINX_WORKER_PROCESSES
+          value: "2"
+        - name: KONG_KIC
+          value: "on"
+          # logging
+        - name: KONG_ADMIN_ACCESS_LOG
+          value: /dev/stdout
+        - name: KONG_ADMIN_ERROR_LOG
+          value: /dev/stderr
+        # - name: KONG_PROXY_ACCESS_LOG
+        # - value: /dev/stdout
+        - name: KONG_PROXY_ERROR_LOG
+          value: /dev/stderr
+        # router mode in 3.0.0. use `traditional` here for full compatibility.
+        - name: KONG_ROUTER_FLAVOR
+          value: traditional
+        lifecycle:
+          preStop:
+            exec:
+              command: [ "/bin/bash", "-c", "kong quit" ]
+        ports:
+        - name: proxy
+          containerPort: 8000
+          protocol: TCP
+        - name: proxy-ssl
+          containerPort: 8443
+          protocol: TCP
+        - name: metrics
+          containerPort: 8100
+          protocol: TCP
+        livenessProbe:
+          httpGet:
+            path: /status
+            port: 8100
+            scheme: HTTP
+          initialDelaySeconds: 5
+          timeoutSeconds: 1
+          periodSeconds: 10
+          successThreshold: 1
+          failureThreshold: 3
+        readinessProbe:
+          httpGet:
+            path: /status/ready
+            port: 8100
+            scheme: HTTP
+          initialDelaySeconds: 5
+          timeoutSeconds: 1
+          periodSeconds: 10
+          successThreshold: 1
+          failureThreshold: 3

config/variants/multi-gw-postgres/base/gateway_service_patch.yaml

@@ -0,0 +1,8 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: kong-proxy
+  namespace: kong
+spec:
+  selector:
+    app: proxy-kong

config/variants/multi-gw-postgres/base/kustomization.yaml

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+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: kong
+
+resources:
+- ../../../base
+- gateway_deployment.yaml
+- gateway_admin_service.yaml
+- postgres.yaml
+- migration.yaml
+
+components:
+  - ../../../image/oss
+
+patchesStrategicMerge:
+- manager_multi_gateway_patch.yaml
+- gateway_service_patch.yaml
+
+patchesJson6902:
+- target:
+    group: apps
+    version: v1
+    kind: Deployment
+    name: ingress-kong
+  path: ./remove_proxy_container.yaml

config/variants/multi-gw-postgres/base/manager_multi_gateway_patch.yaml

@@ -0,0 +1,17 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: ingress-kong
+  name: ingress-kong
+  namespace: kong
+spec:
+  template:
+    spec:
+      containers:
+      - name: ingress-controller
+        env:
+        - name: CONTROLLER_KONG_ADMIN_SVC
+          value: kong/kong-admin
+        - name: CONTROLLER_KONG_ADMIN_URL
+          $patch: delete

config/variants/multi-gw-postgres/base/migration.yaml

@@ -0,0 +1,32 @@
+---
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: kong-migrations
+  namespace: kong
+spec:
+  template:
+    metadata:
+      name: kong-migrations
+    spec:
+      initContainers:
+      - name: wait-for-postgres
+        image: kong-placeholder:placeholder
+        env:
+        - name: KONG_PG_HOST
+          value: postgres
+        - name: KONG_PG_PORT
+          value: "5432"
+        command: [ "/bin/bash", "-c", "until timeout 1 bash 9<>/dev/tcp/${KONG_PG_HOST}/${KONG_PG_PORT}; do echo 'waiting for db'; sleep 1; done" ]
+      containers:
+      - name: kong-migrations
+        image: kong-placeholder:placeholder
+        env:
+        - name: KONG_PG_PASSWORD
+          value: kong
+        - name: KONG_PG_HOST
+          value: postgres
+        - name: KONG_PG_PORT
+          value: "5432"
+        command: [ "/bin/bash", "-c", "kong migrations bootstrap && kong migrations up && kong migrations finish" ]
+      restartPolicy: OnFailure

config/variants/multi-gw-postgres/base/postgres.yaml

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+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: postgres
+  namespace: kong
+spec:
+  ports:
+  - name: pgql
+    port: 5432
+    targetPort: 5432
+    protocol: TCP
+  selector:
+    app: postgres
+
+---
+apiVersion: apps/v1  #  for k8s versions before 1.9.0 use apps/v1beta2  and before 1.8.0 use extensions/v1beta1
+kind: StatefulSet
+metadata:
+  name: postgres
+  namespace: kong
+spec:
+  serviceName: "postgres"
+  replicas: 1
+  selector:
+    matchLabels:
+      app: postgres
+  template:
+    metadata:
+      labels:
+        app: postgres
+    spec:
+      containers:
+      - name: postgres
+        image: postgres:9.5
+        volumeMounts:
+        - name: datadir
+          mountPath: /var/lib/postgresql/data
+          subPath: pgdata
+        env:
+        - name: POSTGRES_USER
+          value: kong
+        - name: POSTGRES_PASSWORD
+          value: kong
+        - name: POSTGRES_DB
+          value: kong
+        - name: PGDATA
+          value: /var/lib/postgresql/data/pgdata
+        ports:
+        - containerPort: 5432
+      # No pre-stop hook is required, a SIGTERM plus some time is all that's
+      # needed for graceful shutdown of a node.
+      terminationGracePeriodSeconds: 60
+  volumeClaimTemplates:
+  - metadata:
+      name: datadir
+    spec:
+      accessModes:
+      - "ReadWriteOnce"
+      resources:
+        requests:
+          storage: 1Gi

config/variants/multi-gw-postgres/base/remove_proxy_container.yaml

@@ -0,0 +1,2 @@
+- op: remove
+  path: "/spec/template/spec/containers/1"