tests: patch dns-operator when running over OpenShift

When running over OpenShift need to patch the CRD of dns-operator in
order order to configure extra DNS entry for testing. Using 'jq' utility
to simplify JSON parsing.

See "DNS Operator in OpenShift Container Platform" in OpenShift's
documentations for examples.

Signed-off-by: Shachar Sharon <[email protected]>

Author: synarete

tests/files/openshift-dns-snippet.template

@@ -0,0 +1,18 @@
+{
+	"spec": {
+		"nodePlacement": {},
+		"servers": [
+			{
+				"forwardPlugin": {
+					"upstreams": [
+						"AD_SERVER_IP:53"
+					]
+				},
+				"name": "samba-ad",
+				"zones": [
+					"domain1.sink.test"
+				]
+	 		}
+		]
+	}
+}

tests/test-deploy-ad-server.sh

@@ -6,13 +6,22 @@ BASE_DIR="$(cd "${SCRIPT_DIR}/.." && pwd)"
 DEPLOYMENT_YAML="${BASE_DIR}/tests/files/samba-ad-server-deployment.yml"
 DEPLOYMENT_NAME="samba-ad-server"
 COREDNS_SNIPPET="${BASE_DIR}/tests/files/coredns-snippet.template"
+OPENSHIFT_DNS_SNIPPET="${BASE_DIR}/tests/files/openshift-dns-snippet.template"
 KUBECTL_CMD=${KUBECTL_CMD:-kubectl}
+JQ_CMD=${JQ_CMD:-jq}
 
 _error() {
 	echo "$@"
 	exit 1
 }
 
+_require_command() {
+	command -v "${1}" > /dev/null || _error "Can not find ${1}"
+}
+_require_command "${KUBECTL_CMD}"
+_require_command "${JQ_CMD}"
+
+
 echo "Creating ad server deployment..."
 ERROR_MSG=$(${KUBECTL_CMD} create -f "${DEPLOYMENT_YAML}" 2>&1 1>/dev/null)
 if [ $? -ne 0 ] ; then
@@ -65,12 +74,31 @@ echo
 [ $rc -eq 0 ] || _error "Error: samba ad did not become reachable"
 
 
-
-AD_POD_IP=$(${KUBECTL_CMD} get pod -o jsonpath='{ .items[*].status.podIP }')
+AD_POD_IP=$(${KUBECTL_CMD}  get pod -o json \
+	| ${JQ_CMD} -c -M '.items[] | .metadata.name + " " + .status.podIP' \
+	| grep samba-ad-server \
+	| tr -d "\"" \
+	| awk '{print $2}')
 [ $? -eq 0 ] || _error "Error getting ad server pod IP"
-
 echo "AD pod IP: ${AD_POD_IP}"
 
+# when running over OpenShift need to patch dns-operator
+${KUBECTL_CMD} get deployment dns-operator \
+	-n openshift-dns-operator > /dev/null 2>&1
+OPENSHIFT_DNS="$?"
+if [ ${OPENSHIFT_DNS} -eq 0 ]; then
+	PATCHFILE=$(mktemp).json
+	sed -e "s/AD_SERVER_IP/${AD_POD_IP}/g" \
+		${OPENSHIFT_DNS_SNIPPET} > "${PATCHFILE}"
+
+	${KUBECTL_CMD} patch dns.operator default \
+		--type=merge --patch-file "${PATCHFILE}"
+
+	[ $? -eq 0 ] || _error "Failed patching dns-operator with $PATCHFILE"
+	unlink "${PATCHFILE}"
+	exit 0
+fi
+
 TMPFILE=$(mktemp)
 
 cat > "${TMPFILE}" <<EOF