chore(server): split gcloud sql proxy into a separate deployment (#5101)

After merge this pull request, need to change the `DATABASE_URL` in environment secrets (stable/beta) from `127.0.0.1` to `affine-cloud-sql-proxy`

.github/helm/affine/charts/gcloud-sql-proxy/templates/NOTES.txt

@@ -0,0 +1,18 @@
+{{- if .Values.global.database.gcloud.enabled -}}
+1. Get the application URL by running these commands:
+{{- if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "gcloud-sql-proxy.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "gcloud-sql-proxy.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "gcloud-sql-proxy.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "gcloud-sql-proxy.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
+{{- end }}
+{{- end }}

.github/helm/affine/charts/gcloud-sql-proxy/templates/_helpers.tpl

@@ -0,0 +1,62 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "gcloud-sql-proxy.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "gcloud-sql-proxy.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "gcloud-sql-proxy.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "gcloud-sql-proxy.labels" -}}
+helm.sh/chart: {{ include "gcloud-sql-proxy.chart" . }}
+{{ include "gcloud-sql-proxy.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "gcloud-sql-proxy.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "gcloud-sql-proxy.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "gcloud-sql-proxy.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "gcloud-sql-proxy.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

.github/helm/affine/charts/gcloud-sql-proxy/templates/deployment.yaml

@@ -0,0 +1,132 @@
+{{- if .Values.global.database.gcloud.enabled -}}
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "gcloud-sql-proxy.fullname" . }}
+  labels:
+    {{- include "gcloud-sql-proxy.labels" . | nindent 4 }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      {{- include "gcloud-sql-proxy.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "gcloud-sql-proxy.labels" . | nindent 8 }}
+	{{- with .Values.podLabels }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "gcloud-sql-proxy.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          terminationMessagePath: /dev/termination-log
+          terminationMessagePolicy: File
+          image: "{{ .Values.image.repository }}:{{ .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          args:
+            - "--address"
+            - "0.0.0.0"
+            - "--structured-logs"
+            - "--auto-iam-authn"
+            - "{{ .Values.global.database.gcloud.connectionName }}"
+          env:
+            # Enable HTTP healthchecks on port 9801. This enables /liveness,
+            # /readiness and /startup health check endpoints. Allow connections
+            # listen for connections on any interface (0.0.0.0) so that the
+            # k8s management components can reach these endpoints.
+            - name: CSQL_PROXY_HEALTH_CHECK
+              value: "true"
+            - name: CSQL_PROXY_HTTP_PORT
+              value: "9801"
+            - name: CSQL_PROXY_HTTP_ADDRESS
+              value: 0.0.0.0
+          ports:
+            - name: cloud-sql-proxy
+              containerPort: {{ .Values.global.database.gcloud.proxyPort }}
+              protocol: TCP
+            - containerPort: 9801
+              protocol: TCP
+          # The /startup probe returns OK when the proxy is ready to receive
+          # connections from the application. In this example, k8s will check
+          # once a second for 60 seconds.
+          startupProbe:
+            failureThreshold: 60
+            httpGet:
+              path: /startup
+              port: 9801
+              scheme: HTTP
+            periodSeconds: 1
+            successThreshold: 1
+            timeoutSeconds: 10
+          # The /liveness probe returns OK as soon as the proxy application has
+          # begun its startup process and continues to return OK until the
+          # process stops.
+          livenessProbe:
+            failureThreshold: 3
+            httpGet:
+              path: /liveness
+              port: 9801
+              scheme: HTTP
+            # The probe will be checked every 10 seconds.
+            periodSeconds: 10
+            # Number of times the probe is allowed to fail before the transition
+            # from healthy to failure state.
+            #
+            # If periodSeconds = 60, 5 tries will result in five minutes of
+            # checks. The proxy starts to refresh a certificate five minutes
+            # before its expiration. If those five minutes lapse without a
+            # successful refresh, the liveness probe will fail and the pod will be
+            # restarted.
+            successThreshold: 1
+            # The probe will fail if it does not respond in 10 seconds
+            timeoutSeconds: 10
+          readinessProbe:
+            # The /readiness probe returns OK when the proxy can establish
+            # a new connections to its databases.
+            httpGet:
+              path: /readiness
+              port: 9801
+            initialDelaySeconds: 10
+            periodSeconds: 10
+            timeoutSeconds: 10
+            # Number of times the probe must report success to transition from failure to healthy state.
+            # Defaults to 1 for readiness probe.
+            successThreshold: 1
+            failureThreshold: 6
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+          {{- with .Values.volumeMounts }}
+          volumeMounts:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+      {{- with .Values.volumes }}
+      volumes:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+{{- end }}

.github/helm/affine/charts/gcloud-sql-proxy/templates/service.yaml

@@ -0,0 +1,17 @@
+{{- if .Values.global.database.gcloud.enabled -}}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "gcloud-sql-proxy.fullname" . }}
+  labels:
+    {{- include "gcloud-sql-proxy.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.global.database.port }}
+      targetPort: cloud-sql-proxy
+      protocol: TCP
+      name: cloud-sql-proxy
+  selector:
+    {{- include "gcloud-sql-proxy.selectorLabels" . | nindent 4 }}
+{{- end }}

.github/helm/affine/charts/gcloud-sql-proxy/templates/serviceaccount.yaml

@@ -0,0 +1,15 @@
+{{- if .Values.global.database.gcloud.enabled -}}
+{{- if .Values.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "gcloud-sql-proxy.serviceAccountName" . }}
+  labels:
+    {{- include "gcloud-sql-proxy.labels" . | nindent 4 }}
+  {{- with .Values.serviceAccount.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+automountServiceAccountToken: {{ .Values.serviceAccount.automount }}
+{{- end }}
+{{- end }}

.github/helm/affine/charts/gcloud-sql-proxy/templates/tests/test-connection.yaml

@@ -0,0 +1,17 @@
+{{- if .Values.global.database.gcloud.enabled -}}
+apiVersion: v1
+kind: Pod
+metadata:
+  name: "{{ include "gcloud-sql-proxy.fullname" . }}-test-connection"
+  labels:
+    {{- include "gcloud-sql-proxy.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test
+spec:
+  containers:
+    - name: wget
+      image: busybox
+      command: ['wget']
+      args: ['{{ include "gcloud-sql-proxy.fullname" . }}:{{ .Values.service.port }}']
+  restartPolicy: Never
+{{- end }}