constants

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• Constants

Constants

const (
	// IPTable chains used by RouteAgent.
	SmPostRoutingChain = "SUBMARINER-POSTROUTING"
	SmInputChain       = "SUBMARINER-INPUT"
	SmForwardChain     = "SUBMARINER-FORWARD"
	PostRoutingChain   = "POSTROUTING"
	InputChain         = "INPUT"
	ForwardChain       = "FORWARD"
	MangleTable        = "mangle"
	RemoteCIDRIPSet    = "SUBMARINER-REMOTECIDRS"
	LocalCIDRIPSet     = "SUBMARINER-LOCALCIDRS"

	// In order to support connectivity from HostNetwork to remoteCluster, route-agent tries
	// to discover the CNIInterface[#] on the respective node and does SNAT of outgoing
	// traffic from that node to the corresponding CNIInterfaceIP. It is to be noted that
	// only traffic destined to the remoteClusters connected via Submariner is SNAT'ed and not
	// any other traffic.
	// At the same time, when Globalnet controller is deployed (i.e., clusters with overlapping
	// Service/Cluster CIDRs) it needs this information so that it can map the CNIInterfaceIP
	// with the corresponding globalIP assigned to the node. Since globalnet controller does
	// not run on all the worker-nodes and there is no well defined mechanism to get the
	// CNIInterfaceIP for each of the nodes, we annotate the node with CNIInterfaceIPInfo as
	// part of route-agent and this will subsequently be used in globalnet controller for
	// supporting connectivity from HostNetwork to remoteClusters.
	// [#] interface on the node that has an IPAddress from the clusterCIDR.
	CNIInterfaceIP = "submariner.io/cniIfaceIp"

	RouteAgentInterClusterNetworkTableID = 149

	// To support connectivity for Pods with HostNetworking on the GatewayNode, we program
	// certain routing rules in table 150. As part of these routes, we set the source-ip of
	// the egress traffic to the corresponding CNIInterfaceIP on that host.
	RouteAgentHostNetworkTableID = 150

	NATTable    = "nat"
	FilterTable = "filter"

	OvnTransitSwitchIPAnnotation = "k8s.ovn.org/node-transit-switch-port-ifaddr"
	OvnZoneAnnotation            = "k8s.ovn.org/zone-name"
)