script to set a cluster in maintenance mode

deployment/scripts/cluster.maintenance.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# base setup
+SCRIPT_PATH=$(realpath $0)
+SCRIPT_DIR=$(dirname $SCRIPT_PATH)
+
+# configuration
+CONFIGURATION=${CONFIGURATION:-"example"}
+KUBECONFIG=${KUBECONFIG:-${SCRIPT_DIR}/../configurations/${CONFIGURATION}/kubeconfig.yaml}
+
+case $1 in
+    on)
+        kubectl --kubeconfig=${KUBECONFIG} patch ingress ingress-ocelot-webapp --type merge --patch-file ${SCRIPT_DIR}/../src/kubernetes/patches/patch.ingress.maintenance.on.yaml
+    ;;
+    off)
+        kubectl --kubeconfig=${KUBECONFIG} patch ingress ingress-ocelot-webapp --type merge --patch-file ${SCRIPT_DIR}/../src/kubernetes/patches/patch.ingress.maintenance.off.yaml
+    ;;
+    *)
+        echo -e "Run this script with first argument either 'on' or 'off'"
+        exit
+    ;;
+esac

deployment/src/kubernetes/patches/patch.ingress.maintenance.off.yaml

@@ -0,0 +1,12 @@
+spec:
+  rules:
+    - host: 
+      http:
+        paths:
+          - path: /
+            pathType: ImplementationSpecific
+            backend:
+              service:
+                name: ocelot-webapp
+                port:
+                  number: 3000

deployment/src/kubernetes/patches/patch.ingress.maintenance.on.yaml

@@ -0,0 +1,12 @@
+spec:
+  rules:
+    - host: 
+      http:
+        paths:
+          - path: /
+            pathType: ImplementationSpecific
+            backend:
+              service:
+                name: ocelot-maintenance
+                port:
+                  number: 80