123 lines
3.3 KiB
Go
123 lines
3.3 KiB
Go
/*
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Copyright 2022 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 v1beta1
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import (
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"fmt"
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"os"
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core "k8s.io/api/core/v1"
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"k8s.io/klog/v2"
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api "k8s.io/kubelet/pkg/apis/deviceplugin/v1beta1"
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v1helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
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"k8s.io/kubernetes/pkg/kubelet/pluginmanager/cache"
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)
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func (s *server) GetPluginHandler() cache.PluginHandler {
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if f, err := os.Create(s.socketDir + "DEPRECATION"); err != nil {
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klog.ErrorS(err, "Failed to create deprecation file at socket dir", "path", s.socketDir)
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} else {
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f.Close()
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klog.V(4).InfoS("Created deprecation file", "path", f.Name())
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}
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return s
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}
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func (s *server) RegisterPlugin(pluginName string, endpoint string, versions []string) error {
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klog.V(2).InfoS("Registering plugin at endpoint", "plugin", pluginName, "endpoint", endpoint)
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return s.connectClient(pluginName, endpoint)
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}
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func (s *server) DeRegisterPlugin(pluginName string) {
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klog.V(2).InfoS("Deregistering plugin", "plugin", pluginName)
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client := s.getClient(pluginName)
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if client != nil {
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s.disconnectClient(pluginName, client)
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}
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}
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func (s *server) ValidatePlugin(pluginName string, endpoint string, versions []string) error {
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klog.V(2).InfoS("Got plugin at endpoint with versions", "plugin", pluginName, "endpoint", endpoint, "versions", versions)
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if !s.isVersionCompatibleWithPlugin(versions...) {
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return fmt.Errorf("manager version, %s, is not among plugin supported versions %v", api.Version, versions)
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}
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if !v1helper.IsExtendedResourceName(core.ResourceName(pluginName)) {
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return fmt.Errorf("invalid name of device plugin socket: %s", fmt.Sprintf(errInvalidResourceName, pluginName))
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}
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return nil
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}
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func (s *server) connectClient(name string, socketPath string) error {
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c := NewPluginClient(name, socketPath, s.chandler)
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s.registerClient(name, c)
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if err := c.Connect(); err != nil {
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s.deregisterClient(name)
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klog.ErrorS(err, "Failed to connect to new client", "resource", name)
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return err
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}
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go func() {
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s.runClient(name, c)
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}()
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return nil
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}
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func (s *server) disconnectClient(name string, c Client) error {
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s.deregisterClient(name)
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return c.Disconnect()
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}
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func (s *server) registerClient(name string, c Client) {
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s.mutex.Lock()
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defer s.mutex.Unlock()
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s.clients[name] = c
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klog.V(2).InfoS("Registered client", "name", name)
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}
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func (s *server) deregisterClient(name string) {
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s.mutex.Lock()
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defer s.mutex.Unlock()
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delete(s.clients, name)
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klog.V(2).InfoS("Deregistered client", "name", name)
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}
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func (s *server) runClient(name string, c Client) {
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c.Run()
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c = s.getClient(name)
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if c == nil {
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return
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}
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if err := s.disconnectClient(name, c); err != nil {
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klog.V(2).InfoS("Unable to disconnect client", "resource", name, "client", c, "err", err)
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}
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}
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func (s *server) getClient(name string) Client {
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s.mutex.Lock()
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defer s.mutex.Unlock()
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return s.clients[name]
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}
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