interfaces

README

CasaOS-Common

Common structs and functions for CasaOS

Documentation

Index

• type MigrationTool

Types

type MigrationTool

type MigrationTool interface {
	IsMigrationNeeded() (bool, error)
	PreMigrate() error
	Migrate() error
	PostMigrate() error
}

Any logic to migrate data from previous version to current can implement this interface.

The model for migrating from v0.n to v0.m is an execution chain of each version of this migration tool:

START -> migration-tool-v0.n -> migration-tool-v0.n+1 -> ... -> migration-tool-v0.m -> END

Therefore, each migration tool in the chain SHOULD ONLY work on data such as config files and databases. It is responsibility of any install/setup script to control the services because it knows when migration starts and ends.

!!!IMPORTANT!!! DO NOT stop, start, enable or disable services, because the whole execution chain might not have been completed.