Pivotal/Cloud Foundry/Tasks

Cloud Foundry | Cloud Foundry CLI | Apps | Tasks | Logs

Blue/Green App Deployment

https://docs.cloudfoundry.org/devguide/deploy-apps/blue-green.html

Push an app

start by pushing the app and defining the subdomain (hostname) and domain.

~$ cf push web-app -n daring-wildebeest -d cfapps.io

Update the app and push a new version

This will be done along side the old version and given a new subdomain. The old version will retain its existing route and traffic to it will still go to the old app version.

~$ cf push web-app-2 -n responsive-aligator -d cfapps.io

Map original route to new app

Now that we have (2) separate instances of the web-app running, one of the old version and one of the new version, we can map the old route to the new app. This will not replace the old app, instead both the old and new apps will be accessible from the old route (quasi load balanced).

~$ cf map-route web-app-2 cfapps.io --hostname web-app-daring-wildebeest

Unmap old app from old route

Next we can unmap the old app from the old route, leaving only the new app accessible from the old route.

~$ cf unmap-route web-app cfapps.io --hostname web-app-daring-wildebeest

Unmap new app from new route

With the new app deployed on the old route, we can remove the new route that we initially setup during the app deployment. Once the new app has been vested, you can delete the new route altogether.

~$ cf unmap-route web-app-2 cfapps.io --hostname web-app-2-responsive-aligator 
~$ cf delete-route cfapps.io --hostname web-app-2-responsive-aligator

Attach route service to app

https://docs.cloudfoundry.org/services/route-services.html
sample app:https://github.com/cloudfoundry-samples/spring-music
sample route service: https://github.com/cloudfoundry-samples/logging-route-service

push app and service

~$ git clone https://github.com/cloudfoundry-samples/spring-music.git && git clone https://github.com/cloudfoundry-samples/logging-route-service.git
~$ ./spring-music/gradlew -b ./spring-music/build.gradle clean assemble
~$ cf push spring-music -f ./spring-music/manifest.yml
~$ cd ./logging-route-service
~$ cf push logging-route-service -f ./manifest.yml -m 1G
~$ cd ..

create service and bind

~$ [Git] cf routes | grep -E 'host|spring-music|logging'
space                  host                                    domain                             port   path   type   apps                    service
user_test_space   spring-music-grouchy-cassowary          cfapps-16.haas-59.pez.pivotal.io                        spring-music
user_test_space   logging-route-service                   cfapps-16.haas-59.pez.pivotal.io                        logging-route-service

~$ [Git] cf app logging-route-service | grep routes
routes:            logging-route-service.cfapps-16.haas-59.pez.pivotal.io

~$ cf create-user-provided-service mylogger -r https://logging-route-service.cfapps-16.haas-59.pez.pivotal.io
~$ cf bind-route-service cfapps-16.haas-59.pez.pivotal.io mylogger --hostname spring-music-grouchy-cassowary

review logs from service

~$ curl spring-music-grouchy-cassowary.cfapps-16.haas-59.pez.pivotal.io
~$ cf logs logging-route-service --recent

removal

~$ cf unbind-route-service cfapps-16.haas-59.pez.pivotal.io mylogger --hostname spring-music-grouchy-cassowary -f
~$ cf delete spring-music -f && cf delete logging-route-service -f
~$ cf delete-orphaned-routes -f