88 lines
2.9 KiB
Go
88 lines
2.9 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package kubelet
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import (
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
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kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
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)
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// This just exports required functions from kubelet proper, for use by network
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// plugins.
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// TODO(#35457): get rid of this backchannel to the kubelet. The scope of
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// the back channel is restricted to host-ports/testing, and restricted
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// to kubenet. No other network plugin wrapper needs it. Other plugins
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// only require a way to access namespace information, which they can do
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// directly through the methods implemented by criNetworkHost.
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type networkHost struct {
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kubelet *Kubelet
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}
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func (nh *networkHost) GetPodByName(name, namespace string) (*v1.Pod, bool) {
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return nh.kubelet.GetPodByName(name, namespace)
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}
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func (nh *networkHost) GetKubeClient() clientset.Interface {
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return nh.kubelet.kubeClient
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}
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func (nh *networkHost) GetRuntime() kubecontainer.Runtime {
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return nh.kubelet.GetRuntime()
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}
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func (nh *networkHost) SupportsLegacyFeatures() bool {
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return true
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}
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// criNetworkHost implements the part of network.Host required by the
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// cri (NamespaceGetter). It leechs off networkHost for all other
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// methods, because networkHost is slated for deletion.
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type criNetworkHost struct {
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*networkHost
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}
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// GetNetNS returns the network namespace of the given containerID.
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// This method satisfies the network.NamespaceGetter interface for
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// networkHost. It's only meant to be used from network plugins
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// that are directly invoked by the kubelet (aka: legacy, pre-cri).
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// Any network plugin invoked by a cri must implement NamespaceGetter
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// to talk directly to the runtime instead.
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func (c *criNetworkHost) GetNetNS(containerID string) (string, error) {
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return c.kubelet.GetRuntime().GetNetNS(kubecontainer.ContainerID{Type: "", ID: containerID})
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}
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// noOpLegacyHost implements the network.LegacyHost interface for the remote
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// runtime shim by just returning empties. It doesn't support legacy features
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// like host port and bandwidth shaping.
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type noOpLegacyHost struct{}
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func (n *noOpLegacyHost) GetPodByName(namespace, name string) (*v1.Pod, bool) {
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return nil, true
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}
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func (n *noOpLegacyHost) GetKubeClient() clientset.Interface {
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return nil
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}
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func (n *noOpLegacyHost) GetRuntime() kubecontainer.Runtime {
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return nil
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}
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func (nh *noOpLegacyHost) SupportsLegacyFeatures() bool {
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return false
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}
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