Merge pull request #4691 from edx/jdmulloy/ops3164/maintenance_wrapper_script

Add maintenance playbook wrapper script OPS-3164

util/maintenance.sh

+#!/bin/bash
+
+usage() {
+    echo "Usage: $0 environment-deploy (enable|disable)"
+    echo
+    echo "Examples:"
+    echo "    Turn on maintenance page for stage-edx:    $0 stage-edx enable"
+    echo "    Turn off maintenance page for stage-edx:   $0 stage-edx disable"
+    exit 1
+}
+
+ED=$1
+ENABLE_ARG=$2
+
+case $ED in
+    loadtest-edx|stage-edx|prod-edx|prod-edge)
+        ;;
+    *)
+        echo "ERROR: environment-deploy must be one of loadtest-edx, stage-edx, prod-edx or prod-edge"
+        echo
+        usage
+        ;;
+esac
+
+case $ENABLE_ARG in
+    enable)
+        ENABLE="True"
+        ;;
+    disable)
+        ENABLE="False"
+        ;;
+    *)
+        echo "ERROR: must specify enable or disable"
+        echo
+        usage
+        ;;
+esac
+
+INVENTORY=$(aws ec2 describe-instances --filter "Name=tag:Name,Values=${ED}-edxapp,${ED}-studio,${ED}-worker" --query 'Reservations[].Instances[].PrivateIpAddress' --output text | tr '\t' ',')
+ENABLE_EXTRA_VAR="{\"ENABLE_MAINTENANCE\": ${ENABLE}}"
+
+ansible-playbook ./edx_maintenance.yml -i "${INVENTORY}," -e "${ENABLE_EXTRA_VAR}"