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add portmapping getter into network host

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This commit is contained in:
Minhan Xia
2017-02-03 13:11:01 -08:00
parent 8e7219cbb4
commit bd05e1af2b
6 changed files with 101 additions and 20 deletions
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31
pkg/kubelet/network/plugins.go
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@@ -30,6 +30,7 @@ import (
"k8s.io/kubernetes/pkg/apis/componentconfig"
"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
"k8s.io/kubernetes/pkg/kubelet/network/hostport"
utilexec "k8s.io/kubernetes/pkg/util/exec"
utilsysctl "k8s.io/kubernetes/pkg/util/sysctl"
)
@@ -111,9 +112,9 @@ type LegacyHost interface {
// Only used for hostport management
GetRuntime() kubecontainer.Runtime
// SupportsLegacyFeaturs returns true if this host can support hostports
// and bandwidth shaping. Both will either get added to CNI or dropped,
// so differnt implementations can choose to ignore them.
// SupportsLegacyFeatures returns true if the network host support GetPodByName, KubeClient interface and kubelet
// runtime interface. These interfaces will no longer be implemented by CRI shims.
// This function helps network plugins to choose their behavior based on runtime.
SupportsLegacyFeatures() bool
}
@@ -121,17 +122,19 @@ type LegacyHost interface {
// TODO(#35457): get rid of this backchannel to the kubelet. The scope of
// the back channel is restricted to host-ports/testing, and restricted
// to kubenet. No other network plugin wrapper needs it. Other plugins
// only require a way to access namespace information, which they can do
// directly through the embedded NamespaceGetter.
// only require a way to access namespace information and port mapping
// information , which they can do directly through the embedded interfaces.
type Host interface {
// NamespaceGetter is a getter for sandbox namespace information.
// It's the only part of this interface that isn't currently deprecated.
NamespaceGetter
// PortMappingGetter is a getter for sandbox port mapping information.
PortMappingGetter
// LegacyHost contains methods that trap back into the Kubelet. Dependence
// *do not* add more dependencies in this interface. In a post-cri world,
// network plugins will be invoked by the runtime shim, and should only
// require NamespaceGetter.
// require GetNetNS and GetPodPortMappings.
LegacyHost
}
@@ -143,6 +146,14 @@ type NamespaceGetter interface {
GetNetNS(containerID string) (string, error)
}
// PortMappingGetter is an interface to retrieve port mapping information for a given
// sandboxID. Typically implemented by runtime shims that are closely coupled to
// CNI plugin wrappers like kubenet.
type PortMappingGetter interface {
// GetPodPortMappings returns sandbox port mappings information.
GetPodPortMappings(containerID string) ([]*hostport.PortMapping, error)
}
// InitNetworkPlugin inits the plugin that matches networkPluginName. Plugins must have unique names.
func InitNetworkPlugin(plugins []NetworkPlugin, networkPluginName string, host Host, hairpinMode componentconfig.HairpinMode, nonMasqueradeCIDR string, mtu int) (NetworkPlugin, error) {
if networkPluginName == "" {
@@ -276,3 +287,9 @@ func GetPodIP(execer utilexec.Interface, nsenterPath, netnsPath, interfaceName s
return ip, nil
}
type NoopPortMappingGetter struct{}
func (*NoopPortMappingGetter) GetPodPortMappings(containerID string) ([]*hostport.PortMapping, error) {
return nil, nil
}