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>

1 files changed, 62 insertions, 0 deletions

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