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>

10 files changed, 407 insertions, 0 deletions

diff --git a/kubernetes/contrib/dns-server-for-vhost-ingress-testing/README.md b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/README.md
new file mode 100644
index 0000000000..dced68d7c6
--- /dev/null
+++ b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/README.md
@@ -0,0 +1,23 @@
+#  Motivations
+Ingress controller implementation in the ONAP cluster is based on the virtual host routing.
+Testing ONAP cluster requires a lot of entries on the target machines in the /etc/hosts.
+Adding many entries into the configuration files on testing machines is quite problematic and error prone.
+The better wait is to create central DNS server with entries for all virtual host pointed to simpledemo.onap.org and add custom DNS server as a target DNS server for testing machines and/or as external DNS for kubernetes cluster.
+
+# How to deploy test DNS server:
+Run script ./deploy\_dns.sh
+
+#  How to add DNS address on testing machines:
+See post deploy info
+
+# Test DNS inside cluster (optional)
+1. You can add the following entry after DNS deploy on running cluster at the end of cluster.yaml file (rke)
+~~~yaml
+dns:
+	provider: coredns
+	upstreamnameservers:
+		- <cluster_ip>:31555
+~~~
+2. You can edit coredns configuration with command:
+		kubectl -n kube-system edit configmap coredns
+
diff --git a/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/.helmignore b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/.helmignore
new file mode 100644
index 0000000000..dacad44a66
--- /dev/null
+++ b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/.helmignore
@@ -0,0 +1,37 @@
+#
+#   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.
+
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/
diff --git a/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/Chart.yaml b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/Chart.yaml
new file mode 100644
index 0000000000..a618fd792c
--- /dev/null
+++ b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/Chart.yaml
@@ -0,0 +1,20 @@
+#
+#   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
+appVersion: "1.0"
+description: bind9 DNS server for kubernetes cluster
+name: bind9dns
+version: 0.1.0
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
diff --git a/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/values.yaml b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/values.yaml
new file mode 100644
index 0000000000..c9e19f41d0
--- /dev/null
+++ b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/bind9dns/values.yaml
@@ -0,0 +1,46 @@
+#
+#   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.
+
+replicaCount: 1
+
+image:
+  repository:  luccksam/docker-bind
+  tag: 0.1.0
+  pullPolicy: IfNotPresent
+
+nameOverride: ""
+fullnameOverride: ""
+
+service:
+  type: NodePort
+  port: 53
+  nodePort: 31555
+
+ingress:
+  enabled: false
+  annotations: {}
+  paths: []
+  hosts:
+    - dnsserver.local
+  tls: []
+
+resources: {}
+nodeSelector: {}
+tolerations: []
+affinity: {}
+
+dnsconf:
+    forwarder: "8.8.8.8,8.8.4.4"
+    wildcard: "simpledemo.onap.org=0.0.0.0"
diff --git a/kubernetes/contrib/dns-server-for-vhost-ingress-testing/deploy_dns.sh b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/deploy_dns.sh
new file mode 100755
index 0000000000..a78bc077d8
--- /dev/null
+++ b/kubernetes/contrib/dns-server-for-vhost-ingress-testing/deploy_dns.sh
@@ -0,0 +1,62 @@
+#!/bin/bash -e
+#
+#   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.
+#
+DNS_PORT=31555
+CLUSTER_CONTROL=$( kubectl get no -l node-role.kubernetes.io/controlplane=true -o jsonpath='{.items..metadata.name}')
+CLUSTER_IP=$(kubectl get no $CLUSTER_CONTROL  -o jsonpath='{.metadata.annotations.rke\.cattle\.io/external-ip }')
+SPATH="$( dirname "$( which "$0" )" )"
+
+
+
+usage() {
+cat << ==usage
+$0 [cluster_domain] [helm_chart_args ...]
+	[cluster_domain] Default value simpledemo.onap.org
+	[helm_chart_args...] Optional arguments passed to helm install command
+==usage
+}
+
+
+target_machine_notice_info() {
+cat << ==infodeploy
+Extra DNS server already deployed:
+1. You can add the DNS server to the target machine using following commands:
+	sudo iptables -t nat -A OUTPUT -p tcp -d 192.168.211.211 --dport 53 -j DNAT --to-destination $CLUSTER_IP:$DNS_PORT
+	sudo iptables -t nat -A OUTPUT -p udp -d 192.168.211.211 --dport 53 -j DNAT --to-destination $CLUSTER_IP:$DNS_PORT
+	sudo sysctl -w net.ipv4.conf.all.route_localnet=1
+	sudo sysctl -w net.ipv4.ip_forward=1
+2. Update /etc/resolv.conf file with nameserver 192.168.211.211 entry on your target machine
+==infodeploy
+}
+
+deploy() {
+	pushd "$SPATH/bind9dns" > /dev/null
+	if [ $# -eq 0 ]; then
+		local cl_domain="simpledemo.onap.org"
+	else
+		local cl_domain=$1
+		shift
+	fi
+	helm install . --set dnsconf.wildcard="$cl_domain=$CLUSTER_IP" $@
+	popd > /dev/null
+	target_machine_notice_info
+}
+
+if [[ $# -eq 1 ]] && [[ $1 == "-h" || $1 == "--help" ]]; then
+	usage
+else
+	deploy $@
+fi