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Blue/Green Deployment Script
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#!/bin/bash | |
# | |
# This product includes software originally developed by IBM Corporation. | |
# | |
# | |
# Copyright IBM Corp. 2015 | |
# | |
# 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. | |
# | |
# # This is a fork of https://gist.github.com/ryanjbaxter/9ec2dd5de1b1279338bf | |
## Thanks Ryan for making this available. | |
## Edits to make this work with the CLTRe Toolkit. | |
# **********************************USAGE*************************************** | |
# This script will will do a blue/green deployment of an app to Cloud Foundry. # | |
# It assumes you are already logged in, if not make sure you run `cf login` # | |
# before executing this script. # | |
# # | |
# This scrip can do the following things # | |
# 1. Push the application # | |
# 2. Bind Services # | |
# 3. Set Environment Variables # | |
# 4. Map Routes # | |
# 5. Start the application # | |
# # | |
# If a version of the application already exists in the org and space being # | |
# deployed to this script will deploy the new application under the name # | |
# <appName>-new. The routes mapped to the existing application will be mapped # | |
# to the new version. Then the old version of the application will be deleted # | |
# and the new version will be renamed to <appName>. # | |
# # | |
# The scripts depends on a couple of environment variables being set. # | |
# 1. CF_APP - This environment variable is set by default in IBM DevOPs # | |
# Services # | |
# 2. ENV_VARS - Environment variables to be set. The value should take the # | |
# form NAME1:value1,NAME2:value2 # | |
# 3. SERVICES - Services that should be bound to the application. The value # | |
# should take the form servicename1,servicename2 # | |
# 4. ROUTES - Routes that should be mapped to the app. The value should # | |
# take the form host1:domain1,host2:domain2,domain3 # | |
# 5. CF_PUSH_ARGS - a string of arguments to use when calling `cf push # | |
# For example, pushing a specific artifact or setting the memory. # | |
# # | |
# # | |
# To use this script in IBM DevOps Services paste the following Bash script in # | |
# your Deploy stage. # | |
# # | |
# #!/bin/bash # | |
# git clone https://gist.github.com/9ec2dd5de1b1279338bf.git deploy # | |
# /bin/bash deploy/bluegreen.sh # | |
# RESULT=$? # | |
# # | |
# if [ $RESULT -ne 0 ]; then # | |
# echo -e "${red}Executed failed or had warnings ${no_color}" # | |
# exit $RESULT # | |
# fi # | |
# echo -e "${green}Execution complete${no_label}" # | |
# ****************************************************************************** | |
COMMAND="cf apps | grep -w --quiet ${CF_APP}" | |
if eval $COMMAND; then | |
export EXISTS=true | |
export APP_NAME="${CF_APP}-new" | |
else | |
export EXISTS=false | |
export APP_NAME="${CF_APP}" | |
fi | |
echo "Pushing application" | |
cf push $APP_NAME $CF_PUSH_ARGS --no-start | |
echo "Done pushing application" | |
echo "Setting environment variables" | |
IFS=',' read -a envvarsarray <<< "$ENV_VARS" | |
for element in "${envvarsarray[@]}" | |
do | |
IFS=':' read -a envvar <<< "$element" | |
cf set-env $APP_NAME ${envvar[0]} ${envvar[1]} | |
done | |
cf restage CLTReToolkit-new | |
echo "Mapping routes in order to balance traffic between two instances" | |
IFS=',' read -a routesarray <<< "$ROUTES" | |
for element in "${routesarray[@]}" | |
do | |
if [[ $element == *":"* ]]; then | |
IFS=':' read -a route <<< "$element" | |
cf map-route $APP_NAME ${route[1]} -n ${route[0]} | |
else | |
cf map-route $APP_NAME $element | |
fi | |
done | |
echo "Done mapping routes" | |
echo "Starting application" | |
cf start $APP_NAME | |
echo "Done starting application" | |
echo "Cleaning up old application" | |
if $EXISTS; then | |
cf delete -f ${CF_APP} | |
cf unmap-route $APP_NAME mybluemix.net -n $APP_NAME | |
cf rename $APP_NAME ${CF_APP} | |
else | |
echo "No cleanup needed, app did not exist" | |
fi | |
echo "Done cleaning up the old application" | |
# view logs | |
#cf logs "${CF_APP}" --recent |
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