DNS test server for ingress controller

Testing ingress controller based on virtual hosts
requires a lot of entries in the /etc/hosts.
The better way is to create DNS server for testing purposes.

Signed-off-by: Lucjan Bryndza <l.bryndza@samsung.com>
Issue-ID: OOM-2289
Change-Id: I2ab104c7391e9634972931ac7e79bec5711d2b39
Signed-off-by: Lucjan Bryndza <l.bryndza@samsung.com>

5 files changed, 219 insertions, 0 deletions

diff --git a/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/NOTES.txt b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/NOTES.txt
new file mode 100644
index 0000000000..7211966b89
--- /dev/null
+++ b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/NOTES.txt
@@ -0,0 +1,21 @@
+1. Get the installed DNS host and port by running this commands:
+{{- if .Values.ingress.enabled }}
+{{- range $host := .Values.ingress.hosts }}
+  {{- range $.Values.ingress.paths }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host }}{{ . }}
+  {{- end }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "bind9dns.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo DNS host: $NODE_IP dns port: $NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get svc -w {{ include "bind9dns.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "bind9dns.fullname" . }} -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
+  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 "bind9dns.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl port-forward $POD_NAME 8080:80
+{{- end }}
diff --git a/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/_helpers.tpl b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/_helpers.tpl
new file mode 100644
index 0000000000..3efbbbf831
--- /dev/null
+++ b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/_helpers.tpl
@@ -0,0 +1,49 @@
+{{/*
+
+   Copyright 2020 Samsung Electronics Co., Ltd.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+*/}}
+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "bind9dns.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 "bind9dns.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 "bind9dns.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
diff --git a/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/deployment.yaml b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/deployment.yaml
new file mode 100644
index 0000000000..1a76ba0a96
--- /dev/null
+++ b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/deployment.yaml
@@ -0,0 +1,76 @@
+{{/*
+   Copyright 2020 Samsung Electronics Co., Ltd.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/}}
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "bind9dns.fullname" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "bind9dns.name" . }}
+    helm.sh/chart: {{ include "bind9dns.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: {{ include "bind9dns.name" . }}
+      app.kubernetes.io/instance: {{ .Release.Name }}
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: {{ include "bind9dns.name" . }}
+        app.kubernetes.io/instance: {{ .Release.Name }}
+    spec:
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          env:
+            - name: DNS_FORWARDER
+              value: {{ .Values.dnsconf.forwarder }}
+            - name: WILDCARD_DNS
+              value: {{ .Values.dnsconf.wildcard }}
+            - name: ALLOW_RECURSION
+              value: any
+            - name: ALLOW_QUERY
+              value: any
+          ports:
+            - name: dnsport
+              containerPort: {{ .Values.service.port }}
+          livenessProbe:
+            tcpSocket:
+              port: {{ .Values.service.port }}
+            initialDelaySeconds: 15
+            periodSeconds: 20
+          readinessProbe:
+            tcpSocket:
+              port: {{ .Values.service.port }}
+            initialDelaySeconds: 5
+            periodSeconds: 10
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+    {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+    {{- end }}
+    {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+    {{- end }}
diff --git a/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/service.yaml b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/service.yaml
new file mode 100644
index 0000000000..715f2ff78e
--- /dev/null
+++ b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/service.yaml
@@ -0,0 +1,39 @@
+{{/*
+   Copyright 2020 Samsung Electronics Co., Ltd.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+*/}}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "bind9dns.fullname" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "bind9dns.name" . }}
+    helm.sh/chart: {{ include "bind9dns.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.port }}
+      nodePort: {{ .Values.service.nodePort }}
+      protocol: TCP
+      name: dnstcp
+    - port: {{ .Values.service.port }}
+      nodePort: {{ .Values.service.nodePort }}
+      protocol: UDP
+      name: dnsudp
+  selector:
+    app.kubernetes.io/name: {{ include "bind9dns.name" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
diff --git a/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/tests/test-connection.yaml b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/tests/test-connection.yaml
new file mode 100644
index 0000000000..4fe5d05b02
--- /dev/null
+++ b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/templates/tests/test-connection.yaml
@@ -0,0 +1,34 @@
+{{/*
+   Copyright 2020 Samsung Electronics Co., Ltd.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+*/}}
+apiVersion: v1
+kind: Pod
+metadata:
+  name: "{{ include "bind9dns.fullname" . }}-test-connection"
+  labels:
+    app.kubernetes.io/name: {{ include "bind9dns.name" . }}
+    helm.sh/chart: {{ include "bind9dns.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+  annotations:
+    "helm.sh/hook": test-success
+spec:
+  containers:
+    - name: wget
+      image: busybox
+      command: ['wget']
+      args:  ['{{ include "bind9dns.fullname" . }}:{{ .Values.service.port }}']
+  restartPolicy: Never