bootstrap

Documentation

Index

• type Bootstrapper
  • func NewBootstrapper(lock Locker, clock clock.Clock, client client.TxnClient, ...) Bootstrapper
• type Locker

Types

type Bootstrapper

type Bootstrapper interface {
	// Bootstrap creates some internal databases and tables at the time of MO
	Bootstrap(ctx context.Context) error
}

Bootstrapper is used to create some internal databases and tables at the time of MO initialization according to a specific logic. It provides the necessary dependencies for other components to be launched later.

Note that, this bootstrapper is not used to bootstrap logservice and dn. The internal databases and tables as below: 1. mo_indexes in mo_catalog 2. task inferstructure database

func NewBootstrapper

func NewBootstrapper(
	lock Locker,
	clock clock.Clock,
	client client.TxnClient,
	exec executor.SQLExecutor) Bootstrapper

NewBootstrapper create bootstrapper to bootstrap mo database

type Locker

type Locker interface {
	// Get return true means get lock
	Get(ctx context.Context) (bool, error)
}

Locker locker is used to get lock to bootstrap. Only one cn can get lock to bootstrap. Other cns need to wait bootstrap completed.