Investigate support for multiple route tables about cloud-provider HOT 11 CLOSED

/assign @andrewsykim

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@aoxn what's the use-case for multiple route tables?

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The background is that CCM goes wrong when user has multiple routetalbes under their VPC. Because the default ccm behavior is to write the 0th route table which would not be the target(route table).

Alibaba Cloud use a self defined controller extended cloudprovider interface to solve this issue for now. It might be better to solve it in cloudporivder interface level as other provider may face the same problems.

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ping @aoxn what's the status of this for v1.17?

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@andrewsykim I am afraid a new Interface would be add in order to support multiple routetables

// Routes is an abstract, pluggable interface for advanced routing rules.
type Routes interface {
	// RouteTables get all available route tables.
	RouteTables(clusterName string) ([]string, error)
	// ListRoutes lists all managed routes that belong to the specified clusterName
	ListRoutes(clusterName string, table string) ([]*cloudprovider.Route, error)
	// CreateRoute creates the described managed route
	// route.Name will be ignored, although the cloud-provider may use nameHint
	// to create a more user-meaningful name.
	CreateRoute(clusterName string, nameHint string, table string, route *cloudprovider.Route) error
	// DeleteRoute deletes the specified managed route
	// Route should be as returned by ListRoutes
	DeleteRoute(clusterName string, table string, route *cloudprovider.Route) error
}

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@fejta-bot: Closing this issue.

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