User Scripts allow users to hook into Coriolis’ OS Morphing process and execute any needed last-minute customizations for the instance(s) being Migrated before being booted up on the destination cloud platform.
The feature is available in the following scenarios:
- Creating a Replica Deployment from a current Replica
- Creating a Migration
- User Scrips will be one of the steps prior to starting a Migration task
- The step is available after target configurations
In both cases, you can choose to have one generic, global script per operating system type (Linux, Windows, etc.) or a custom script for a specific instance.
Supported User Scripts file formats:
- for Linux VMs, any scripting language available on a standard Linux (bash, python, etc.)
- for Windows VMs, PowerShell and batch scripts are supported.
User Scripts can be leveraged in the following sample scenarios:
- Install/Remove packages on the instance, that take place on the destination platform (not on the source VM) prior to the Migration process
- Make additional configuration changes
- Download files on the instance
- Install 3rd party drivers
User scripts will run with elevated privileges, so they will have the same access rights as Coriolis itself.
Example of a PowerShell User Script for a Windows VM, this lists all 3rd party drivers from the migrated OS disk of the instance:
dism.exe /Image:$OS /Get-Drivers
This is a Linux User Script snippet that will download a file to the /var folder on the migrated instance disk:
#$1 represents the root disk path
wget https://url -O "$root_disk/var"