migrate redis

The contents of this repo allow for an easy migration of Redis service instances using a custom Docker Image and Push2Cloud Workflow.

Note: this workflow creates service instances that might incur additional cost.

How to / TL;DR

git clone https://github.com/push2cloud/migrate-redis.git
cd migrate-redis
vi deploymentConfig.json # Edit target to fit your deployment
npm install # install push2cloud dependencies
DEBUG=* ./node_modules/.bin/p2c exec ./workflow/migrate.js

Details!

The workflow performs the following steps for you:

1. Create all the required Push2Cloud data structures
2. Create new service instances (same plan is used)
3. Create migration apps, configure via environment variables
4. Stops all applications in configured space
5. Starts migration apps and waits for completion/failure
6. Stops and deletes migration apps
7. Renames old service instances to ${name}-old
8. Renames new serivce instances to their proper name
9. Starts all apps again

Using a different service

By default, the migration will always use a service called redis. If the service is called differently, you can configure the names via environment variables:

OLD_SERVICE_TYPE_NAME=redis-2 NEW_SERVICE_TYPE_NAME=redis-2 DEBUG=* ./node_modules/.bin/p2c exec ./workflow/migrate.js

Migration app

The migration application is a custom Docker image that runs migrate.sh on startup. The docker container must be configured via the two environment variables fromService and toSerivice (names of the CF service instances). migrate.sh performs a complete data migration between the configured services using redis-dump and the redis-cli

Customizing

This workflow is meant to be used as a base for your own custom migration workflows. You probably want to fine tune start/stop behaviour to your liking. Open an Issue if you have questions on how to achieve certain things.